Fix rb non ipc case and tests in general

Implicit aclose on all channels on ChannelManager aclose
Implicit nursery cancel on pubsub acms
Use long running actor portal for open_{pub,sub}_channel_at fns
Add optional encoder/decoder on pubsub
Add topic system for multiple pub or sub on same actor
Add wait fn for sub and pub channel register

.github/workflows/ci.yml

@@ -8,12 +8,29 @@ on:
   workflow_dispatch:
 
 jobs:
-  # ------ sdist ------
+
+  mypy:
+    name: 'MyPy'
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install the latest version of uv
+        uses: astral-sh/setup-uv@v5
+
+      - name: Setup env
+        run: uv venv .venv --python=3.11
+
+      - name: Install
+        run: uv sync --group=dev
+
+      - name: Run MyPy check
+        run: uv run mypy tractor/ --ignore-missing-imports --show-traceback
+
   # test that we can generate a software distribution and install it
   # thus avoid missing file issues after packaging.
-  #
-  # -[x] produce sdist with uv
-  # ------ - ------
   sdist-linux:
     name: 'sdist'
     runs-on: ubuntu-latest
@@ -22,56 +39,17 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Install latest uv
-        uses: astral-sh/setup-uv@v6
+      - name: Install the latest version of uv
+        uses: astral-sh/setup-uv@v5
 
-      - name: Build sdist as tar.gz
-        run: uv build --sdist --python=3.13
+      - name: Setup env
+        run: uv venv .venv --python=3.11
 
-      - name: Install sdist from .tar.gz
-        run: python -m pip install dist/*.tar.gz
+      - name: Build sdist
+        run: uv build --sdist
 
-  # ------ type-check ------
-  # mypy:
-  #   name: 'MyPy'
-  #   runs-on: ubuntu-latest
-
-  #   steps:
-  #     - name: Checkout
-  #       uses: actions/checkout@v4
-
-  #     - name: Install latest uv
-  #       uses: astral-sh/setup-uv@v6
-
-  #     # faster due to server caching?
-  #     # https://docs.astral.sh/uv/guides/integration/github/#setting-up-python
-  #     - name: "Set up Python"
-  #       uses: actions/setup-python@v6
-  #       with:
-  #         python-version-file: "pyproject.toml"
-
-  #     # w uv
-  #     # - name: Set up Python
-  #     #   run: uv python install
-
-  #     - name: Setup uv venv
-  #       run: uv venv .venv --python=3.13
-
-  #     - name: Install
-  #       run: uv sync --dev
-
-  #     # TODO, ty cmd over repo
-  #     # - name: type check with ty
-  #     #   run: ty ./tractor/
-
-  #     # - uses: actions/cache@v3
-  #     #     name: Cache uv virtenv as default .venv
-  #     #     with:
-  #     #       path: ./.venv
-  #     #       key: venv-${{ hashFiles('uv.lock') }}
-
-  #     - name: Run MyPy check
-  #       run: mypy tractor/ --ignore-missing-imports --show-traceback
+      - name: Install sdist from .zips
+        run: uv run pip install dist/*.tar.gz
 
 
   testing-linux:
@@ -83,45 +61,32 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        python-version: ['3.13']
+        python: ['3.11']
         spawn_backend: [
           'trio',
-          # 'mp_spawn',
-          # 'mp_forkserver',
+          'mp_spawn',
+          'mp_forkserver',
         ]
 
     steps:
+      - name: Checkout
+        uses: actions/checkout@v4
 
-      - uses: actions/checkout@v4
+      - name: Install the latest version of uv
+        uses: astral-sh/setup-uv@v5
 
-      - name: 'Install uv + py-${{ matrix.python-version }}'
-        uses: astral-sh/setup-uv@v6
-        with:
-          python-version: ${{ matrix.python-version }}
+      - name: Setup env
+        run: uv venv .venv --python=3.11
 
-      # GH way.. faster?
-      # - name: setup-python@v6
-      #   uses: actions/setup-python@v6
-      #   with:
-      #     python-version: '${{ matrix.python-version }}'
+      - name: Install dependencies
+        run: uv sync --all-groups
 
-      # consider caching for speedups?
-      # https://docs.astral.sh/uv/guides/integration/github/#caching
-
-      - name: Install the project w uv
-        run: uv sync --all-extras --dev
-
-      # - name: Install dependencies
-      #   run: pip install -U . -r requirements-test.txt -r requirements-docs.txt --upgrade-strategy eager
-
-      - name: List deps tree
-        run: uv tree
+      - name: List dependencies
+        run: uv pip list
 
       - name: Run tests
-        run: uv run pytest tests/ --spawn-backend=${{ matrix.spawn_backend }} -rsx
+        run: uv run pytest tests/ --ignore=tests/devx --spawn-backend=${{ matrix.spawn_backend }} -rsx
 
-  # XXX legacy NOTE XXX
-  #
   # We skip 3.10 on windows for now due to not having any collabs to
   # debug the CI failures. Anyone wanting to hack and solve them is very
   # welcome, but our primary user base is not using that OS.

default.nix

@@ -11,9 +11,4 @@ pkgs.mkShell {
 
   LD_LIBRARY_PATH = pkgs.lib.makeLibraryPath nativeBuildInputs;
   TMPDIR = "/tmp";
-
-  shellHook = ''
-    set -e
-    uv venv .venv --python=3.12
-  '';
 }

docs/README.rst

@@ -1,5 +1,8 @@
 |logo| ``tractor``: distributed structurred concurrency
 
+|gh_actions|
+|docs|
+
 ``tractor`` is a `structured concurrency`_ (SC), multi-processing_ runtime built on trio_.
 
 Fundamentally, ``tractor`` provides parallelism via
@@ -63,13 +66,6 @@ Features
   - (WIP) a ``TaskMngr``: one-cancels-one style nursery supervisor.
 
 
-Status of `main` / infra
-------------------------
-
-- |gh_actions|
-- |docs|
-
-
 Install
 -------
 ``tractor`` is still in a *alpha-near-beta-stage* for many
@@ -693,11 +689,9 @@ channel`_!
 .. _msgspec: https://jcristharif.com/msgspec/
 .. _guest: https://trio.readthedocs.io/en/stable/reference-lowlevel.html?highlight=guest%20mode#using-guest-mode-to-run-trio-on-top-of-other-event-loops
 
-..
-   NOTE, on generating badge links from the UI
-   https://docs.github.com/en/actions/how-tos/monitoring-and-troubleshooting-workflows/monitoring-workflows/adding-a-workflow-status-badge?ref=gitguardian-blog-automated-secrets-detection#using-the-ui
-.. |gh_actions| image:: https://github.com/goodboy/tractor/actions/workflows/ci.yml/badge.svg?branch=main
-    :target: https://github.com/goodboy/tractor/actions/workflows/ci.yml
+
+.. |gh_actions| image:: https://img.shields.io/endpoint.svg?url=https%3A%2F%2Factions-badge.atrox.dev%2Fgoodboy%2Ftractor%2Fbadge&style=popout-square
+    :target: https://actions-badge.atrox.dev/goodboy/tractor/goto
 
 .. |docs| image:: https://readthedocs.org/projects/tractor/badge/?version=latest
     :target: https://tractor.readthedocs.io/en/latest/?badge=latest

examples/debugging/asyncio_bp.py

@@ -29,7 +29,7 @@ async def bp_then_error(
     to_trio.send_nowait('start')
 
     # NOTE: what happens here inside the hook needs some refinement..
-    # => seems like it's still `.debug._set_trace()` but
+    # => seems like it's still `._debug._set_trace()` but
     #    we set `Lock.local_task_in_debug = 'sync'`, we probably want
     #    some further, at least, meta-data about the task/actor in debug
     #    in terms of making it clear it's `asyncio` mucking about.

examples/debugging/restore_builtin_breakpoint.py

@@ -4,11 +4,6 @@ import sys
 import trio
 import tractor
 
-# ensure mod-path is correct!
-from tractor.devx.debug import (
-    _sync_pause_from_builtin as _sync_pause_from_builtin,
-)
-
 
 async def main() -> None:
 
@@ -18,23 +13,19 @@ async def main() -> None:
 
     async with tractor.open_nursery(
         debug_mode=True,
-        loglevel='devx',
-        maybe_enable_greenback=True,
-        # ^XXX REQUIRED to enable `breakpoint()` support (from sync
-        # fns) and thus required here to avoid an assertion err
-        # on the next line
-    ):
+    ) as an:
+        assert an
         assert (
             (pybp_var := os.environ['PYTHONBREAKPOINT'])
             ==
-            'tractor.devx.debug._sync_pause_from_builtin'
+            'tractor.devx._debug._sync_pause_from_builtin'
         )
 
         # TODO: an assert that verifies the hook has indeed been, hooked
         # XD
         assert (
             (pybp_hook := sys.breakpointhook)
-            is not tractor.devx.debug._set_trace
+            is not tractor.devx._debug._set_trace
         )
 
         print(

examples/debugging/root_cancelled_but_child_is_in_tty_lock.py

@@ -24,9 +24,10 @@ async def spawn_until(depth=0):
 
 
 async def main():
-    '''
-    The process tree should look as approximately as follows when the
-    debugger first engages:
+    """The main ``tractor`` routine.
+
+    The process tree should look as approximately as follows when the debugger
+    first engages:
 
     python examples/debugging/multi_nested_subactors_bp_forever.py
     ├─ python -m tractor._child --uid ('spawner1', '7eab8462 ...)
@@ -36,11 +37,10 @@ async def main():
     └─ python -m tractor._child --uid ('spawner0', '1d42012b ...)
        └─ python -m tractor._child --uid ('name_error', '6c2733b8 ...)
 
-    '''
+    """
     async with tractor.open_nursery(
         debug_mode=True,
-        loglevel='devx',
-        enable_transports=['uds'],
+        loglevel='warning'
     ) as n:
 
         # spawn both actors

examples/debugging/shield_hang_in_sub.py

@@ -37,7 +37,6 @@ async def main(
             enable_stack_on_sig=True,
             # maybe_enable_greenback=False,
             loglevel='devx',
-            enable_transports=['uds'],
         ) as an,
     ):
         ptl: tractor.Portal  = await an.start_actor(

examples/debugging/subactor_bp_in_ctx.py

@@ -33,11 +33,8 @@ async def just_bp(
 
 
 async def main():
-
     async with tractor.open_nursery(
         debug_mode=True,
-        enable_transports=['uds'],
-        loglevel='devx',
     ) as n:
         p = await n.start_actor(
             'bp_boi',

examples/debugging/sync_bp.py

@@ -6,7 +6,7 @@ import tractor
 
 # TODO: only import these when not running from test harness?
 # can we detect `pexpect` usage maybe?
-# from tractor.devx.debug import (
+# from tractor.devx._debug import (
 #     get_lock,
 #     get_debug_req,
 # )

pyproject.toml

@@ -61,13 +61,13 @@ dev = [
   # `tractor.devx` tooling
   "greenback>=1.2.1,<2",
   "stackscope>=0.2.2,<0.3",
-  # ^ requires this?
-  "typing-extensions>=4.14.1",
-
   "pyperclip>=1.9.0",
   "prompt-toolkit>=3.0.50",
   "xonsh>=0.19.2",
+  "numpy>=2.2.4", # used for fast test sample gen
+  "mypy>=1.15.0",
   "psutil>=7.0.0",
+  "trio-typing>=0.10.0",
 ]
 # TODO, add these with sane versions; were originally in
 # `requirements-docs.txt`..

tests/conftest.py

@@ -6,22 +6,21 @@ from __future__ import annotations
 import sys
 import subprocess
 import os
+import random
 import signal
 import platform
 import time
 
 import pytest
+import tractor
 from tractor._testing import (
     examples_dir as examples_dir,
     tractor_test as tractor_test,
     expect_ctxc as expect_ctxc,
 )
 
-pytest_plugins: list[str] = [
-    'pytester',
-    'tractor._testing.pytest',
-]
-
+# TODO: include wtv plugin(s) we build in `._testing.pytest`?
+pytest_plugins = ['pytester']
 
 # Sending signal.SIGINT on subprocess fails on windows. Use CTRL_* alternatives
 if platform.system() == 'Windows':
@@ -49,9 +48,6 @@ no_windows = pytest.mark.skipif(
 def pytest_addoption(
     parser: pytest.Parser,
 ):
-    # ?TODO? should this be exposed from our `._testing.pytest`
-    # plugin or should we make it more explicit with `--tl` for
-    # tractor logging like we do in other client projects?
     parser.addoption(
         "--ll",
         action="store",
@@ -59,10 +55,54 @@ def pytest_addoption(
         default='ERROR', help="logging level to set when testing"
     )
 
+    parser.addoption(
+        "--spawn-backend",
+        action="store",
+        dest='spawn_backend',
+        default='trio',
+        help="Processing spawning backend to use for test run",
+    )
+
+    parser.addoption(
+        "--tpdb",
+        "--debug-mode",
+        action="store_true",
+        dest='tractor_debug_mode',
+        # default=False,
+        help=(
+            'Enable a flag that can be used by tests to to set the '
+            '`debug_mode: bool` for engaging the internal '
+            'multi-proc debugger sys.'
+        ),
+    )
+
+    # provide which IPC transport protocols opting-in test suites
+    # should accumulatively run against.
+    parser.addoption(
+        "--tpt-proto",
+        nargs='+',  # accumulate-multiple-args
+        action="store",
+        dest='tpt_protos',
+        default=['tcp'],
+        help="Transport protocol to use under the `tractor.ipc.Channel`",
+    )
+
+
+def pytest_configure(config):
+    backend = config.option.spawn_backend
+    tractor._spawn.try_set_start_method(backend)
+
+
+@pytest.fixture(scope='session')
+def debug_mode(request) -> bool:
+    debug_mode: bool = request.config.option.tractor_debug_mode
+    # if debug_mode:
+    #     breakpoint()
+    return debug_mode
+
 
 @pytest.fixture(scope='session', autouse=True)
 def loglevel(request):
-    import tractor
     orig = tractor.log._default_loglevel
     level = tractor.log._default_loglevel = request.config.option.loglevel
     tractor.log.get_console_log(level)
@@ -70,6 +110,49 @@ def loglevel(request):
     tractor.log._default_loglevel = orig
 
 
+@pytest.fixture(scope='session')
+def spawn_backend(request) -> str:
+    return request.config.option.spawn_backend
+
+
+@pytest.fixture(scope='session')
+def tpt_protos(request) -> list[str]:
+
+    # allow quoting on CLI
+    proto_keys: list[str] = [
+        proto_key.replace('"', '').replace("'", "")
+        for proto_key in request.config.option.tpt_protos
+    ]
+
+    # ?TODO, eventually support multiple protos per test-sesh?
+    if len(proto_keys) > 1:
+        pytest.fail(
+            'We only support one `--tpt-proto <key>` atm!\n'
+        )
+
+    # XXX ensure we support the protocol by name via lookup!
+    for proto_key in proto_keys:
+        addr_type = tractor._addr._address_types[proto_key]
+        assert addr_type.proto_key == proto_key
+
+    yield proto_keys
+
+
+@pytest.fixture(
+    scope='session',
+    autouse=True,
+)
+def tpt_proto(
+    tpt_protos: list[str],
+) -> str:
+    proto_key: str = tpt_protos[0]
+    from tractor import _state
+    if _state._def_tpt_proto != proto_key:
+        _state._def_tpt_proto = proto_key
+    # breakpoint()
+    yield proto_key
+
+
 _ci_env: bool = os.environ.get('CI', False)
 
 
@@ -82,6 +165,80 @@ def ci_env() -> bool:
     return _ci_env
 
 
+# TODO: also move this to `._testing` for now?
+# -[ ] possibly generalize and re-use for multi-tree spawning
+#    along with the new stuff for multi-addrs?
+#
+# choose random port at import time
+_rando_port: str = random.randint(1000, 9999)
+
+
+@pytest.fixture(scope='session')
+def reg_addr(
+    tpt_proto: str,
+) -> tuple[str, int|str]:
+
+    # globally override the runtime to the per-test-session-dynamic
+    # addr so that all tests never conflict with any other actor
+    # tree using the default.
+    from tractor import (
+        _addr,
+    )
+    addr_type = _addr._address_types[tpt_proto]
+    def_reg_addr: tuple[str, int] = _addr._default_lo_addrs[tpt_proto]
+
+    testrun_reg_addr: tuple[str, int]
+    match tpt_proto:
+        case 'tcp':
+            testrun_reg_addr = (
+                addr_type.def_bindspace,
+                _rando_port,
+            )
+
+        # NOTE, file-name uniqueness (no-collisions) will be based on
+        # the runtime-directory and root (pytest-proc's) pid.
+        case 'uds':
+            testrun_reg_addr = addr_type.get_random().unwrap()
+
+    assert def_reg_addr != testrun_reg_addr
+    return testrun_reg_addr
+
+
+def pytest_generate_tests(metafunc):
+    spawn_backend: str = metafunc.config.option.spawn_backend
+
+    if not spawn_backend:
+        # XXX some weird windows bug with `pytest`?
+        spawn_backend = 'trio'
+
+    # TODO: maybe just use the literal `._spawn.SpawnMethodKey`?
+    assert spawn_backend in (
+        'mp_spawn',
+        'mp_forkserver',
+        'trio',
+    )
+
+    # NOTE: used-to-be-used-to dyanmically parametrize tests for when
+    # you just passed --spawn-backend=`mp` on the cli, but now we expect
+    # that cli input to be manually specified, BUT, maybe we'll do
+    # something like this again in the future?
+    if 'start_method' in metafunc.fixturenames:
+        metafunc.parametrize(
+            "start_method",
+            [spawn_backend],
+            scope='module',
+        )
+
+    # TODO, parametrize any `tpt_proto: str` declaring tests!
+    # proto_tpts: list[str] = metafunc.config.option.proto_tpts
+    # if 'tpt_proto' in metafunc.fixturenames:
+    #     metafunc.parametrize(
+    #         'tpt_proto',
+    #         proto_tpts,  # TODO, double check this list usage!
+    #         scope='module',
+    #     )
+
+
 def sig_prog(
     proc: subprocess.Popen,
     sig: int,
@@ -103,7 +260,7 @@ def sig_prog(
 def daemon(
     debug_mode: bool,
     loglevel: str,
-    testdir: pytest.Pytester,
+    testdir,
     reg_addr: tuple[str, int],
     tpt_proto: str,
 

tests/devx/conftest.py

@@ -2,11 +2,9 @@
 `tractor.devx.*` tooling sub-pkg test space.
 
 '''
-from __future__ import annotations
 import time
 from typing import (
     Callable,
-    TYPE_CHECKING,
 )
 
 import pytest
@@ -18,7 +16,7 @@ from pexpect.spawnbase import SpawnBase
 from tractor._testing import (
     mk_cmd,
 )
-from tractor.devx.debug import (
+from tractor.devx._debug import (
     _pause_msg as _pause_msg,
     _crash_msg as _crash_msg,
     _repl_fail_msg as _repl_fail_msg,
@@ -28,22 +26,14 @@ from ..conftest import (
     _ci_env,
 )
 
-if TYPE_CHECKING:
-    from pexpect import pty_spawn
-
-
-# a fn that sub-instantiates a `pexpect.spawn()`
-# and returns it.
-type PexpectSpawner = Callable[[str], pty_spawn.spawn]
-
 
 @pytest.fixture
 def spawn(
-    start_method: str,
+    start_method,
     testdir: pytest.Pytester,
     reg_addr: tuple[str, int],
 
-) -> PexpectSpawner:
+) -> Callable[[str], None]:
     '''
     Use the `pexpect` module shipped via `testdir.spawn()` to
     run an `./examples/..` script by name.
@@ -69,7 +59,7 @@ def spawn(
     def _spawn(
         cmd: str,
         **mkcmd_kwargs,
-    ) -> pty_spawn.spawn:
+    ):
         unset_colors()
         return testdir.spawn(
             cmd=mk_cmd(
@@ -83,7 +73,7 @@ def spawn(
         )
 
     # such that test-dep can pass input script name.
-    return _spawn  # the `PexpectSpawner`, type alias.
+    return _spawn
 
 
 @pytest.fixture(
@@ -121,7 +111,7 @@ def ctlc(
         # XXX: disable pygments highlighting for auto-tests
         # since some envs (like actions CI) will struggle
         # the the added color-char encoding..
-        from tractor.devx.debug import TractorConfig
+        from tractor.devx._debug import TractorConfig
         TractorConfig.use_pygements = False
 
     yield use_ctlc

tests/devx/test_debugger.py

@@ -10,14 +10,10 @@ TODO:
     - wonder if any of it'll work on OS X?
 
 """
-from __future__ import annotations
 from functools import partial
 import itertools
 import platform
 import time
-from typing import (
-    TYPE_CHECKING,
-)
 
 import pytest
 from pexpect.exceptions import (
@@ -38,9 +34,6 @@ from .conftest import (
     assert_before,
 )
 
-if TYPE_CHECKING:
-    from ..conftest import PexpectSpawner
-
 # TODO: The next great debugger audit could be done by you!
 # - recurrent entry to breakpoint() from single actor *after* and an
 #   error in another task?
@@ -535,7 +528,7 @@ def test_multi_daemon_subactors(
     # now the root actor won't clobber the bp_forever child
     # during it's first access to the debug lock, but will instead
     # wait for the lock to release, by the edge triggered
-    # ``devx.debug.Lock.no_remote_has_tty`` event before sending cancel messages
+    # ``devx._debug.Lock.no_remote_has_tty`` event before sending cancel messages
     # (via portals) to its underlings B)
 
     # at some point here there should have been some warning msg from
@@ -1070,88 +1063,6 @@ def test_shield_pause(
     child.expect(EOF)
 
 
-@pytest.mark.parametrize(
-    'quit_early', [False, True]
-)
-def test_ctxep_pauses_n_maybe_ipc_breaks(
-    spawn: PexpectSpawner,
-    quit_early: bool,
-):
-    '''
-    Audit generator embedded `.pause()`es from within a `@context`
-    endpoint with a chan close at the end, requiring that ctl-c is
-    mashed and zombie reaper kills sub with no hangs.
-
-    '''
-    child = spawn('subactor_bp_in_ctx')
-    child.expect(PROMPT)
-
-    # 3 iters for the `gen()` pause-points
-    for i in range(3):
-        assert_before(
-            child,
-            [
-                _pause_msg,
-                "('bp_boi'",  # actor name
-                "<Task 'just_bp'",  # task name
-            ]
-        )
-        if (
-            i == 1
-            and
-            quit_early
-        ):
-            child.sendline('q')
-            child.expect(PROMPT)
-            assert_before(
-                child,
-                ["tractor._exceptions.RemoteActorError: remote task raised a 'BdbQuit'",
-                 "bdb.BdbQuit",
-                 "('bp_boi'",
-                ]
-            )
-            child.sendline('c')
-            child.expect(EOF)
-            assert_before(
-                child,
-                ["tractor._exceptions.RemoteActorError: remote task raised a 'BdbQuit'",
-                 "bdb.BdbQuit",
-                 "('bp_boi'",
-                ]
-            )
-            break  # end-of-test
-
-        child.sendline('c')
-        try:
-            child.expect(PROMPT)
-        except TIMEOUT:
-            # no prompt since we hang due to IPC chan purposely
-            # closed so verify we see error reporting as well as
-            # a failed crash-REPL request msg and can CTL-c our way
-            # out.
-            assert_before(
-                child,
-                ['peer IPC channel closed abruptly?',
-                 'another task closed this fd',
-                 'Debug lock request was CANCELLED?',
-                 "TransportClosed: 'MsgpackUDSStream' was already closed locally ?",]
-
-                # XXX races on whether these show/hit?
-                 # 'Failed to REPl via `_pause()` You called `tractor.pause()` from an already cancelled scope!',
-                 # 'AssertionError',
-            )
-            # OSc(ancel) the hanging tree
-            do_ctlc(
-                child=child,
-                expect_prompt=False,
-            )
-            child.expect(EOF)
-            assert_before(
-                child,
-                ['KeyboardInterrupt'],
-            )
-
-
 # TODO: better error for "non-ideal" usage from the root actor.
 # -[ ] if called from an async scope emit a message that suggests
 #    using `await tractor.pause()` instead since it's less overhead

tests/devx/test_tooling.py

@@ -13,16 +13,9 @@ TODO:
   when debugging a problem inside the stack vs. in their app.
 
 '''
-from __future__ import annotations
-from contextlib import (
-    contextmanager as cm,
-)
 import os
 import signal
 import time
-from typing import (
-    TYPE_CHECKING,
-)
 
 from .conftest import (
     expect,
@@ -31,19 +24,14 @@ from .conftest import (
     PROMPT,
     _pause_msg,
 )
-
-import pytest
 from pexpect.exceptions import (
     # TIMEOUT,
     EOF,
 )
 
-if TYPE_CHECKING:
-    from ..conftest import PexpectSpawner
-
 
 def test_shield_pause(
-    spawn: PexpectSpawner,
+    spawn,
 ):
     '''
     Verify the `tractor.pause()/.post_mortem()` API works inside an
@@ -138,7 +126,7 @@ def test_shield_pause(
 
 
 def test_breakpoint_hook_restored(
-    spawn: PexpectSpawner,
+    spawn,
 ):
     '''
     Ensures our actor runtime sets a custom `breakpoint()` hook
@@ -152,22 +140,16 @@ def test_breakpoint_hook_restored(
     child = spawn('restore_builtin_breakpoint')
 
     child.expect(PROMPT)
-    try:
-        assert_before(
-            child,
-            [
-                _pause_msg,
-                "<Task '__main__.main'",
-                "('root'",
-                "first bp, tractor hook set",
-            ]
-        )
-    # XXX if the above raises `AssertionError`, without sending
-    # the final 'continue' cmd to the REPL-active sub-process,
-    # we'll hang waiting for that pexpect instance to terminate..
-    finally:
-        child.sendline('c')
-
+    assert_before(
+        child,
+        [
+            _pause_msg,
+            "<Task '__main__.main'",
+            "('root'",
+            "first bp, tractor hook set",
+        ]
+    )
+    child.sendline('c')
     child.expect(PROMPT)
     assert_before(
         child,
@@ -188,117 +170,3 @@ def test_breakpoint_hook_restored(
     )
     child.sendline('c')
     child.expect(EOF)
-
-
-
-_to_raise = Exception('Triggering a crash')
-
-
-@pytest.mark.parametrize(
-    'to_raise',
-    [
-        None,
-        _to_raise,
-        RuntimeError('Never crash handle this!'),
-    ],
-)
-@pytest.mark.parametrize(
-    'raise_on_exit',
-    [
-        True,
-        [type(_to_raise)],
-        False,
-    ]
-)
-def test_crash_handler_cms(
-    debug_mode: bool,
-    to_raise: Exception,
-    raise_on_exit: bool|list[Exception],
-):
-    '''
-    Verify the `.devx.open_crash_handler()` API(s) by also
-    (conveniently enough) tesing its `repl_fixture: ContextManager`
-    param support which for this suite allows use to avoid use of
-    a `pexpect`-style-test since we use the fixture to avoid actually
-    entering `PdbpREPL.iteract()` :smirk:
-
-    '''
-    import tractor
-    # import trio
-
-    # state flags
-    repl_acquired: bool = False
-    repl_released: bool = False
-
-    @cm
-    def block_repl_ux(
-        repl: tractor.devx.debug.PdbREPL,
-        maybe_bxerr: (
-            tractor.devx._debug.BoxedMaybeException
-            |None
-        ) = None,
-        enter_repl: bool = True,
-
-    ) -> bool:
-        '''
-        Set pre/post-REPL state vars and bypass actual conole
-        interaction.
-
-        '''
-        nonlocal repl_acquired, repl_released
-
-        # task: trio.Task = trio.lowlevel.current_task()
-        # print(f'pre-REPL active_task={task.name}')
-
-        print('pre-REPL')
-        repl_acquired = True
-        yield False  # never actually .interact()
-        print('post-REPL')
-        repl_released = True
-
-    try:
-        # TODO, with runtime's `debug_mode` setting
-        # -[ ] need to open runtime tho obvi..
-        #
-        # with tractor.devx.maybe_open_crash_handler(
-        #     pdb=True,
-
-        with tractor.devx.open_crash_handler(
-            raise_on_exit=raise_on_exit,
-            repl_fixture=block_repl_ux
-        ) as bxerr:
-            if to_raise is not None:
-                raise to_raise
-
-    except Exception as _exc:
-        exc = _exc
-        if (
-            raise_on_exit is True
-            or
-            type(to_raise) in raise_on_exit
-        ):
-            assert (
-                exc
-                is
-                to_raise
-                is
-                bxerr.value
-            )
-
-        else:
-            raise
-    else:
-        assert (
-            to_raise is None
-            or
-            not raise_on_exit
-            or
-            type(to_raise) not in raise_on_exit
-        )
-        assert bxerr.value is to_raise
-
-    assert bxerr.raise_on_exit == raise_on_exit
-
-    if to_raise is not None:
-        assert repl_acquired
-        assert repl_released

tests/ipc/__init__.py

@@ -1,4 +0,0 @@
-'''
-`tractor.ipc` subsystem(s)/unit testing suites.
-
-'''

tests/ipc/test_multi_tpt.py

@@ -1,95 +0,0 @@
-'''
-Verify the `enable_transports` param drives various
-per-root/sub-actor IPC endpoint/server settings.
-
-'''
-from __future__ import annotations
-
-import pytest
-import trio
-import tractor
-from tractor import (
-    Actor,
-    Portal,
-    ipc,
-    msg,
-    _state,
-    _addr,
-)
-
-@tractor.context
-async def chk_tpts(
-    ctx: tractor.Context,
-    tpt_proto_key: str,
-):
-    rtvars = _state._runtime_vars
-    assert (
-        tpt_proto_key
-        in
-        rtvars['_enable_tpts']
-    )
-    actor: Actor = tractor.current_actor()
-    spec: msg.types.SpawnSpec = actor._spawn_spec
-    assert spec._runtime_vars == rtvars
-
-    # ensure individual IPC ep-addr types
-    serv: ipc._server.Server = actor.ipc_server
-    addr: ipc._types.Address
-    for addr in serv.addrs:
-        assert addr.proto_key == tpt_proto_key
-
-    # Actor delegate-props enforcement
-    assert (
-        actor.accept_addrs
-        ==
-        serv.accept_addrs
-    )
-
-    await ctx.started(serv.accept_addrs)
-
-
-# TODO, parametrize over mis-matched-proto-typed `registry_addrs`
-# since i seems to work in `piker` but not exactly sure if both tcp
-# & uds are being deployed then?
-#
-@pytest.mark.parametrize(
-    'tpt_proto_key',
-    ['tcp', 'uds'],
-    ids=lambda item: f'ipc_tpt={item!r}'
-)
-def test_root_passes_tpt_to_sub(
-    tpt_proto_key: str,
-    reg_addr: tuple,
-    debug_mode: bool,
-):
-    async def main():
-        async with tractor.open_nursery(
-            enable_transports=[tpt_proto_key],
-            registry_addrs=[reg_addr],
-            debug_mode=debug_mode,
-        ) as an:
-
-            assert (
-                tpt_proto_key
-                in
-                _state._runtime_vars['_enable_tpts']
-            )
-
-            ptl: Portal = await an.start_actor(
-                name='sub',
-                enable_modules=[__name__],
-            )
-            async with ptl.open_context(
-                chk_tpts,
-                tpt_proto_key=tpt_proto_key,
-            ) as (ctx, accept_addrs):
-
-                uw_addr: tuple
-                for uw_addr in accept_addrs:
-                    addr = _addr.wrap_address(uw_addr)
-                    assert addr.is_valid
-
-            # shudown sub-actor(s)
-            await an.cancel()
-
-    trio.run(main)

tests/ipc/test_server.py

@@ -1,72 +0,0 @@
-'''
-High-level `.ipc._server` unit tests.
-
-'''
-from __future__ import annotations
-
-import pytest
-import trio
-from tractor import (
-    devx,
-    ipc,
-    log,
-)
-from tractor._testing.addr import (
-    get_rando_addr,
-)
-# TODO, use/check-roundtripping with some of these wrapper types?
-#
-# from .._addr import Address
-# from ._chan import Channel
-# from ._transport import MsgTransport
-# from ._uds import UDSAddress
-# from ._tcp import TCPAddress
-
-
-@pytest.mark.parametrize(
-    '_tpt_proto',
-    ['uds', 'tcp']
-)
-def test_basic_ipc_server(
-    _tpt_proto: str,
-    debug_mode: bool,
-    loglevel: str,
-):
-
-    # so we see the socket-listener reporting on console
-    log.get_console_log("INFO")
-
-    rando_addr: tuple = get_rando_addr(
-        tpt_proto=_tpt_proto,
-    )
-    async def main():
-        async with ipc._server.open_ipc_server() as server:
-
-            assert (
-                server._parent_tn
-                and
-                server._parent_tn is server._stream_handler_tn
-            )
-            assert server._no_more_peers.is_set()
-
-            eps: list[ipc._server.Endpoint] = await server.listen_on(
-                accept_addrs=[rando_addr],
-                stream_handler_nursery=None,
-            )
-            assert (
-                len(eps) == 1
-                and
-                (ep := eps[0])._listener
-                and
-                not ep.peer_tpts
-            )
-
-            server._parent_tn.cancel_scope.cancel()
-
-        # !TODO! actually make a bg-task connection from a client
-        # using `ipc._chan._connect_chan()`
-
-    with devx.maybe_open_crash_handler(
-        pdb=debug_mode,
-    ):
-        trio.run(main)

tests/test_eventfd.py

@@ -0,0 +1,66 @@
+import trio
+import pytest
+from tractor.linux.eventfd import (
+    open_eventfd,
+    EFDReadCancelled,
+    EventFD
+)
+
+
+def test_read_cancellation():
+    '''
+    Ensure EventFD.read raises EFDReadCancelled if EventFD.close()
+    is called.
+
+    '''
+    fd = open_eventfd()
+
+    async def bg_read(event: EventFD):
+        with pytest.raises(EFDReadCancelled):
+            await event.read()
+
+    async def main():
+        async with trio.open_nursery() as n:
+            with (
+                EventFD(fd, 'w') as event,
+                trio.fail_after(3)
+            ):
+                n.start_soon(bg_read, event)
+                await trio.sleep(0.2)
+                event.close()
+
+    trio.run(main)
+
+
+def test_read_trio_semantics():
+    '''
+    Ensure EventFD.read raises trio.ClosedResourceError and
+    trio.BusyResourceError.
+
+    '''
+
+    fd = open_eventfd()
+
+    async def bg_read(event: EventFD):
+        try:
+            await event.read()
+
+        except EFDReadCancelled:
+            ...
+
+    async def main():
+        async with trio.open_nursery() as n:
+
+            # start background read and attempt
+            # foreground read, should be busy
+            with EventFD(fd, 'w') as event:
+                n.start_soon(bg_read, event)
+                await trio.sleep(0.2)
+                with pytest.raises(trio.BusyResourceError):
+                    await event.read()
+
+            # attempt read after close
+            with pytest.raises(trio.ClosedResourceError):
+                await event.read()
+
+    trio.run(main)

tests/test_ext_types_msgspec.py

@@ -5,6 +5,7 @@ Low-level functional audits for our
 B~)
 
 '''
+from __future__ import annotations
 from contextlib import (
     contextmanager as cm,
     # nullcontext,
@@ -20,7 +21,7 @@ from msgspec import (
     # structs,
     # msgpack,
     Raw,
-    # Struct,
+    Struct,
     ValidationError,
 )
 import pytest
@@ -46,6 +47,11 @@ from tractor.msg import (
     apply_codec,
     current_codec,
 )
+from tractor.msg._codec import (
+    default_builtins,
+    mk_dec_hook,
+    mk_codec_from_spec,
+)
 from tractor.msg.types import (
     log,
     Started,
@@ -743,6 +749,143 @@ def test_ext_types_over_ipc(
         assert exc.boxed_type is TypeError
 
 
+'''
+Test the auto enc & dec hooks
+
+Create a codec which will work for:
+    - builtins
+    - custom types
+    - lists of custom types
+'''
+
+
+class BytesTestClass(Struct, tag=True):
+    raw: bytes
+
+    def encode(self) -> bytes:
+        return self.raw
+
+    @classmethod
+    def from_bytes(self, raw: bytes) -> BytesTestClass:
+        return BytesTestClass(raw=raw)
+
+
+class StrTestClass(Struct, tag=True):
+    s: str
+
+    def encode(self) -> str:
+        return self.s
+
+    @classmethod
+    def from_str(self, s: str) -> StrTestClass:
+        return StrTestClass(s=s)
+
+
+class IntTestClass(Struct, tag=True):
+    num: int
+
+    def encode(self) -> int:
+        return self.num
+
+    @classmethod
+    def from_int(self, num: int) -> IntTestClass:
+        return IntTestClass(num=num)
+
+
+builtins = tuple((
+    builtin
+    for builtin in default_builtins
+    if builtin is not list
+))
+
+TestClasses = (BytesTestClass, StrTestClass, IntTestClass)
+
+
+TestSpec = (
+    *TestClasses, list[Union[*TestClasses]]
+)
+
+
+test_codec = mk_codec_from_spec(
+    spec=TestSpec
+)
+
+
+@tractor.context
+async def child_custom_codec(
+    ctx: tractor.Context,
+    msgs: list[Union[*TestSpec]],
+):
+    '''
+    Apply codec and send all msgs passed through stream
+
+    '''
+    with (
+        apply_codec(test_codec),
+        limit_plds(
+            test_codec.pld_spec,
+            dec_hook=mk_dec_hook(TestSpec),
+            ext_types=TestSpec + builtins
+        ),
+    ):
+        await ctx.started(None)
+        async with ctx.open_stream() as stream:
+            for msg in msgs:
+                await stream.send(msg)
+
+
+def test_multi_custom_codec():
+    '''
+    Open subactor setup codec and pld_rx and wait to receive & assert from
+    stream
+
+    '''
+    msgs = [
+        None,
+        True, False,
+        0xdeadbeef,
+        .42069,
+        b'deadbeef',
+        BytesTestClass(raw=b'deadbeef'),
+        StrTestClass(s='deadbeef'),
+        IntTestClass(num=0xdeadbeef),
+        [
+            BytesTestClass(raw=b'deadbeef'),
+            StrTestClass(s='deadbeef'),
+            IntTestClass(num=0xdeadbeef),
+        ]
+    ]
+
+    async def main():
+        async with tractor.open_nursery() as an:
+            p: tractor.Portal = await an.start_actor(
+                'child',
+                enable_modules=[__name__],
+            )
+            async with (
+                p.open_context(
+                    child_custom_codec,
+                    msgs=msgs,
+                ) as (ctx, _),
+                ctx.open_stream() as ipc
+            ):
+                with (
+                    apply_codec(test_codec),
+                    limit_plds(
+                        test_codec.pld_spec,
+                        dec_hook=mk_dec_hook(TestSpec),
+                        ext_types=TestSpec + builtins
+                    )
+                ):
+                    msg_iter = iter(msgs)
+                    async for recv_msg in ipc:
+                        assert recv_msg == next(msg_iter)
+
+            await p.cancel_actor()
+
+    trio.run(main)
+
+
 # def chk_pld_type(
 #     payload_spec: Type[Struct]|Any,
 #     pld: Any,

tests/test_infected_asyncio.py

@@ -889,7 +889,7 @@ async def manage_file(
 
         # NOTE: turns out you don't even need to sched an aio task
         # since the original issue, even though seemingly was due to
-        # the guest-run being abandoned + a `.debug.pause()` inside
+        # the guest-run being abandoned + a `._debug.pause()` inside
         # `._runtime._async_main()` (which was originally trying to
         # debug the `.lifetime_stack` not closing), IS NOT actually
         # the core issue?
@@ -1101,7 +1101,7 @@ def test_sigint_closes_lifetime_stack(
 #    => completed using `.bestow_portal(task)` inside
 #     `.to_asyncio._run_asyncio_task()` right?
 #   -[ ] translation func to get from `asyncio` task calling to 
-#     `.debug.wait_for_parent_stdin_hijack()` which does root
+#     `._debug.wait_for_parent_stdin_hijack()` which does root
 #     call to do TTY locking.
 #
 def test_sync_breakpoint():

tests/test_ring_pubsub.py

@@ -0,0 +1,185 @@
+from typing import AsyncContextManager
+from contextlib import asynccontextmanager as acm
+
+import trio
+import pytest
+import tractor
+
+from tractor.trionics import gather_contexts
+
+from tractor.ipc._ringbuf import open_ringbufs
+from tractor.ipc._ringbuf._pubsub import (
+    open_ringbuf_publisher,
+    open_ringbuf_subscriber,
+    get_publisher,
+    get_subscriber,
+    open_pub_channel_at,
+    open_sub_channel_at
+)
+
+
+log = tractor.log.get_console_log(level='info')
+
+
+@tractor.context
+async def publish_range(
+    ctx: tractor.Context,
+    size: int
+):
+    pub = get_publisher()
+    await ctx.started()
+    for i in range(size):
+        await pub.send(i.to_bytes(4))
+        log.info(f'sent {i}')
+
+    await pub.flush()
+
+    log.info('range done')
+
+
+@tractor.context
+async def subscribe_range(
+    ctx: tractor.Context,
+    size: int
+):
+    sub = get_subscriber()
+    await ctx.started()
+
+    for i in range(size):
+        recv = int.from_bytes(await sub.receive())
+        if recv != i:
+            raise AssertionError(
+                f'received: {recv} expected: {i}'
+            )
+
+        log.info(f'received: {recv}')
+
+    log.info('range done')
+
+
+@tractor.context
+async def subscriber_child(ctx: tractor.Context):
+    try:
+        async with open_ringbuf_subscriber(guarantee_order=True):
+            await ctx.started()
+            await trio.sleep_forever()
+
+    finally:
+        log.info('subscriber exit')
+
+
+@tractor.context
+async def publisher_child(
+    ctx: tractor.Context,
+    batch_size: int
+):
+    try:
+        async with open_ringbuf_publisher(
+            guarantee_order=True,
+            batch_size=batch_size
+        ):
+            await ctx.started()
+            await trio.sleep_forever()
+
+    finally:
+        log.info('publisher exit')
+
+
+@acm
+async def open_pubsub_test_actors(
+
+    ring_names: list[str],
+    size: int,
+    batch_size: int
+
+) -> AsyncContextManager[tuple[tractor.Portal, tractor.Portal]]:
+
+    with trio.fail_after(5):
+        async with tractor.open_nursery(
+            enable_modules=[
+                'tractor.linux._fdshare'
+            ]
+        ) as an:
+            modules = [
+                __name__,
+                'tractor.linux._fdshare',
+                'tractor.ipc._ringbuf._pubsub'
+            ]
+            sub_portal = await an.start_actor(
+                'sub',
+                enable_modules=modules
+            )
+            pub_portal = await an.start_actor(
+                'pub',
+                enable_modules=modules
+            )
+
+            async with (
+                sub_portal.open_context(subscriber_child) as (long_rctx, _),
+                pub_portal.open_context(
+                    publisher_child,
+                    batch_size=batch_size
+                ) as (long_sctx, _),
+
+                open_ringbufs(ring_names) as tokens,
+
+                gather_contexts([
+                    open_sub_channel_at('sub', ring)
+                    for ring in tokens
+                ]),
+                gather_contexts([
+                    open_pub_channel_at('pub', ring)
+                    for ring in tokens
+                ]),
+                sub_portal.open_context(subscribe_range, size=size) as (rctx, _),
+                pub_portal.open_context(publish_range, size=size) as (sctx, _)
+            ):
+                yield
+
+                await rctx.wait_for_result()
+                await sctx.wait_for_result()
+
+                await long_sctx.cancel()
+                await long_rctx.cancel()
+
+            await an.cancel()
+
+
+@pytest.mark.parametrize(
+    ('ring_names', 'size', 'batch_size'),
+    [
+        (
+            ['ring-first'],
+            100,
+            1
+        ),
+        (
+            ['ring-first'],
+            69,
+            1
+        ),
+        (
+            [f'multi-ring-{i}' for i in range(3)],
+            1000,
+            100
+        ),
+    ],
+    ids=[
+        'simple',
+        'redo-simple',
+        'multi-ring',
+    ]
+)
+def test_pubsub(
+    request,
+    ring_names: list[str],
+    size: int,
+    batch_size: int
+):
+    async def main():
+        async with open_pubsub_test_actors(
+            ring_names, size, batch_size
+        ):
+            ...
+
+    trio.run(main)

tests/test_ringbuf.py

@@ -1,4 +1,5 @@
 import time
+import hashlib
 
 import trio
 import pytest
@@ -6,36 +7,45 @@ import pytest
 import tractor
 from tractor.ipc._ringbuf import (
     open_ringbuf,
+    open_ringbuf_pair,
+    attach_to_ringbuf_receiver,
+    attach_to_ringbuf_sender,
+    attach_to_ringbuf_channel,
     RBToken,
-    RingBuffSender,
-    RingBuffReceiver
 )
 from tractor._testing.samples import (
-    generate_sample_messages,
+    generate_single_byte_msgs,
+    RandomBytesGenerator
 )
 
-# in case you don't want to melt your cores, uncomment dis!
-pytestmark = pytest.mark.skip
-
 
 @tractor.context
 async def child_read_shm(
     ctx: tractor.Context,
-    msg_amount: int,
     token: RBToken,
-    total_bytes: int,
-) -> None:
-    recvd_bytes = 0
-    await ctx.started()
-    start_ts = time.time()
-    async with RingBuffReceiver(token) as receiver:
-        while recvd_bytes < total_bytes:
-            msg = await receiver.receive_some()
-            recvd_bytes += len(msg)
+) -> str:
+    '''
+    Sub-actor used in `test_ringbuf`.
 
-        # make sure we dont hold any memoryviews
-        # before the ctx manager aclose()
-        msg = None
+    Attach to a ringbuf and receive all messages until end of stream.
+    Keep track of how many bytes received and also calculate 
+    sha256 of the whole byte stream.
+
+    Calculate and print performance stats, finally return calculated
+    hash.
+
+    '''
+    await ctx.started()
+    print('reader started')
+    msg_amount = 0
+    recvd_bytes = 0
+    recvd_hash = hashlib.sha256()
+    start_ts = time.time()
+    async with attach_to_ringbuf_receiver(token) as receiver:
+        async for msg in receiver:
+            msg_amount += 1
+            recvd_hash.update(msg)
+            recvd_bytes += len(msg)
 
     end_ts = time.time()
     elapsed = end_ts - start_ts
@@ -44,6 +54,10 @@ async def child_read_shm(
     print(f'\n\telapsed ms: {elapsed_ms}')
     print(f'\tmsg/sec: {int(msg_amount / elapsed):,}')
     print(f'\tbytes/sec: {int(recvd_bytes / elapsed):,}')
+    print(f'\treceived msgs: {msg_amount:,}')
+    print(f'\treceived bytes: {recvd_bytes:,}')
+
+    return recvd_hash.hexdigest()
 
 
 @tractor.context
@@ -52,17 +66,37 @@ async def child_write_shm(
     msg_amount: int,
     rand_min: int,
     rand_max: int,
-    token: RBToken,
+    buf_size: int
 ) -> None:
-    msgs, total_bytes = generate_sample_messages(
+    '''
+    Sub-actor used in `test_ringbuf`
+
+    Generate `msg_amount` payloads with
+    `random.randint(rand_min, rand_max)` random bytes at the end,
+    Calculate sha256 hash and send it to parent on `ctx.started`.
+
+    Attach to ringbuf and send all generated messages.
+
+    '''
+    rng = RandomBytesGenerator(
         msg_amount,
         rand_min=rand_min,
         rand_max=rand_max,
     )
-    await ctx.started(total_bytes)
-    async with RingBuffSender(token) as sender:
-        for msg in msgs:
-            await sender.send_all(msg)
+    async with (
+        open_ringbuf('test_ringbuf', buf_size=buf_size) as token,
+        attach_to_ringbuf_sender(token) as sender
+    ):
+        await ctx.started(token)
+        print('writer started')
+        for msg in rng:
+            await sender.send(msg)
+
+            if rng.msgs_generated % rng.recommended_log_interval == 0:
+                print(f'wrote {rng.msgs_generated} msgs')
+
+    print('writer exit')
+    return rng.hexdigest
 
 
 @pytest.mark.parametrize(
@@ -89,84 +123,91 @@ def test_ringbuf(
     rand_max: int,
     buf_size: int
 ):
+    '''
+    - Open a new ring buf on root actor
+    - Open `child_write_shm` ctx in sub-actor which will generate a
+    random payload and send its hash on `ctx.started`, finally sending
+    the payload through the stream.
+    - Open `child_read_shm` ctx in sub-actor which will receive the
+    payload, calculate perf stats and return the hash.
+    - Compare both hashes
+
+    '''
     async def main():
-        with open_ringbuf(
-            'test_ringbuf',
-            buf_size=buf_size
-        ) as token:
-            proc_kwargs = {
-                'pass_fds': (token.write_eventfd, token.wrap_eventfd)
-            }
+        async with tractor.open_nursery() as an:
+            send_p = await an.start_actor(
+                'ring_sender',
+                enable_modules=[
+                    __name__,
+                    'tractor.linux._fdshare'
+                ],
+            )
+            recv_p = await an.start_actor(
+                'ring_receiver',
+                enable_modules=[
+                    __name__,
+                    'tractor.linux._fdshare'
+                ],
+            )
+            async with (
+                send_p.open_context(
+                    child_write_shm,
+                    msg_amount=msg_amount,
+                    rand_min=rand_min,
+                    rand_max=rand_max,
+                    buf_size=buf_size
+                ) as (sctx, token),
 
-            common_kwargs = {
-                'msg_amount': msg_amount,
-                'token': token,
-            }
-            async with tractor.open_nursery() as an:
-                send_p = await an.start_actor(
-                    'ring_sender',
-                    enable_modules=[__name__],
-                    proc_kwargs=proc_kwargs
-                )
-                recv_p = await an.start_actor(
-                    'ring_receiver',
-                    enable_modules=[__name__],
-                    proc_kwargs=proc_kwargs
-                )
-                async with (
-                    send_p.open_context(
-                        child_write_shm,
-                        rand_min=rand_min,
-                        rand_max=rand_max,
-                        **common_kwargs
-                    ) as (sctx, total_bytes),
-                    recv_p.open_context(
-                        child_read_shm,
-                        **common_kwargs,
-                        total_bytes=total_bytes,
-                    ) as (sctx, _sent),
-                ):
-                    await recv_p.result()
+                recv_p.open_context(
+                    child_read_shm,
+                    token=token,
+                ) as (rctx, _),
+            ):
+                sent_hash = await sctx.result()
+                recvd_hash = await rctx.result()
 
-                await send_p.cancel_actor()
-                await recv_p.cancel_actor()
+                assert sent_hash == recvd_hash
 
+            await an.cancel()
 
     trio.run(main)
 
 
 @tractor.context
-async def child_blocked_receiver(
-    ctx: tractor.Context,
-    token: RBToken
-):
-    async with RingBuffReceiver(token) as receiver:
-        await ctx.started()
+async def child_blocked_receiver(ctx: tractor.Context):
+    async with (
+        open_ringbuf('test_ring_cancel_reader') as token,
+
+        attach_to_ringbuf_receiver(token) as receiver
+    ):
+        await ctx.started(token)
         await receiver.receive_some()
 
 
-def test_ring_reader_cancel():
+def test_reader_cancel():
+    '''
+    Test that a receiver blocked on eventfd(2) read responds to
+    cancellation.
+
+    '''
     async def main():
-        with open_ringbuf('test_ring_cancel_reader') as token:
+        async with tractor.open_nursery() as an:
+            recv_p = await an.start_actor(
+                'ring_blocked_receiver',
+                enable_modules=[
+                    __name__,
+                    'tractor.linux._fdshare'
+                ],
+            )
             async with (
-                tractor.open_nursery() as an,
-                RingBuffSender(token) as _sender,
+                recv_p.open_context(
+                    child_blocked_receiver,
+                ) as (sctx, token),
+
+                attach_to_ringbuf_sender(token),
             ):
-                recv_p = await an.start_actor(
-                    'ring_blocked_receiver',
-                    enable_modules=[__name__],
-                    proc_kwargs={
-                        'pass_fds': (token.write_eventfd, token.wrap_eventfd)
-                    }
-                )
-                async with (
-                    recv_p.open_context(
-                        child_blocked_receiver,
-                        token=token
-                    ) as (sctx, _sent),
-                ):
-                    await trio.sleep(1)
-                    await an.cancel()
+                await trio.sleep(.1)
+                await an.cancel()
 
 
     with pytest.raises(tractor._exceptions.ContextCancelled):
@@ -174,38 +215,166 @@ def test_ring_reader_cancel():
 
 
 @tractor.context
-async def child_blocked_sender(
-    ctx: tractor.Context,
-    token: RBToken
-):
-    async with RingBuffSender(token) as sender:
-        await ctx.started()
+async def child_blocked_sender(ctx: tractor.Context):
+    async with (
+        open_ringbuf(
+            'test_ring_cancel_sender',
+            buf_size=1
+        ) as token,
+
+        attach_to_ringbuf_sender(token) as sender
+    ):
+        await ctx.started(token)
         await sender.send_all(b'this will wrap')
 
 
-def test_ring_sender_cancel():
+def test_sender_cancel():
+    '''
+    Test that a sender blocked on eventfd(2) read responds to
+    cancellation.
+
+    '''
     async def main():
-        with open_ringbuf(
-            'test_ring_cancel_sender',
-            buf_size=1
-        ) as token:
-            async with tractor.open_nursery() as an:
-                recv_p = await an.start_actor(
-                    'ring_blocked_sender',
-                    enable_modules=[__name__],
-                    proc_kwargs={
-                        'pass_fds': (token.write_eventfd, token.wrap_eventfd)
-                    }
-                )
-                async with (
-                    recv_p.open_context(
-                        child_blocked_sender,
-                        token=token
-                    ) as (sctx, _sent),
-                ):
-                    await trio.sleep(1)
-                    await an.cancel()
+        async with tractor.open_nursery() as an:
+            recv_p = await an.start_actor(
+                'ring_blocked_sender',
+                enable_modules=[
+                    __name__,
+                    'tractor.linux._fdshare'
+                ],
+            )
+            async with (
+                recv_p.open_context(
+                    child_blocked_sender,
+                ) as (sctx, token),
+
+                attach_to_ringbuf_receiver(token)
+            ):
+                await trio.sleep(.1)
+                await an.cancel()
 
 
     with pytest.raises(tractor._exceptions.ContextCancelled):
         trio.run(main)
+
+
+def test_receiver_max_bytes():
+    '''
+    Test that RingBuffReceiver.receive_some's max_bytes optional
+    argument works correctly, send a msg of size 100, then
+    force receive of messages with max_bytes == 1, wait until
+    100 of these messages are received, then compare join of
+    msgs with original message
+
+    '''
+    msg = generate_single_byte_msgs(100)
+    msgs = []
+
+    rb_common = {
+        'cleanup': False,
+        'is_ipc': False
+    }
+
+    async def main():
+        async with (
+            open_ringbuf(
+                'test_ringbuf_max_bytes',
+                buf_size=10,
+                is_ipc=False
+            ) as token,
+
+            trio.open_nursery() as n,
+
+            attach_to_ringbuf_sender(token, **rb_common) as sender,
+
+            attach_to_ringbuf_receiver(token, **rb_common) as receiver
+        ):
+            async def _send_and_close():
+                await sender.send_all(msg)
+                await sender.aclose()
+
+            n.start_soon(_send_and_close)
+            while len(msgs) < len(msg):
+                msg_part = await receiver.receive_some(max_bytes=1)
+                assert len(msg_part) == 1
+                msgs.append(msg_part)
+
+    trio.run(main)
+    assert msg == b''.join(msgs)
+
+
+@tractor.context
+async def child_channel_sender(
+    ctx: tractor.Context,
+    msg_amount_min: int,
+    msg_amount_max: int,
+    token_in: RBToken,
+    token_out: RBToken
+):
+    import random
+    rng = RandomBytesGenerator(
+        random.randint(msg_amount_min, msg_amount_max),
+        rand_min=256,
+        rand_max=1024,
+    )
+    async with attach_to_ringbuf_channel(
+        token_in,
+        token_out
+    ) as chan:
+        await ctx.started()
+        for msg in rng:
+            await chan.send(msg)
+
+        await chan.send(b'bye')
+        await chan.receive()
+        return rng.hexdigest
+
+
+def test_channel():
+
+    msg_amount_min = 100
+    msg_amount_max = 1000
+
+    mods = [
+        __name__,
+        'tractor.linux._fdshare'
+    ]
+
+    async def main():
+        async with (
+            tractor.open_nursery(enable_modules=mods) as an,
+
+            open_ringbuf_pair(
+                'test_ringbuf_transport'
+            ) as (send_token, recv_token),
+
+            attach_to_ringbuf_channel(send_token, recv_token) as chan,
+        ):
+            sender = await an.start_actor(
+                'test_ringbuf_transport_sender',
+                enable_modules=mods,
+            )
+            async with (
+                sender.open_context(
+                    child_channel_sender,
+                    msg_amount_min=msg_amount_min,
+                    msg_amount_max=msg_amount_max,
+                    token_in=recv_token,
+                    token_out=send_token
+                ) as (ctx, _),
+            ):
+                recvd_hash = hashlib.sha256()
+                async for msg in chan:
+                    if msg == b'bye':
+                        await chan.send(b'bye')
+                        break
+
+                    recvd_hash.update(msg)
+
+                sent_hash = await ctx.result()
+
+                assert recvd_hash.hexdigest() == sent_hash
+
+            await an.cancel()
+
+    trio.run(main)

tests/test_root_runtime.py

@@ -83,26 +83,3 @@ def test_implicit_root_via_first_nursery(
             assert tractor.current_actor().aid.name == 'root'
 
     trio.run(main)
-
-
-def test_runtime_vars_unset(
-    reg_addr: tuple,
-    debug_mode: bool
-):
-    '''
-    Ensure any `._state._runtime_vars` are restored to default values
-    after the root actor-runtime exits!
-
-    '''
-    assert not tractor._state._runtime_vars['_debug_mode']
-    async def main():
-        assert not tractor._state._runtime_vars['_debug_mode']
-        async with tractor.open_nursery(
-            debug_mode=True,
-        ):
-            assert tractor._state._runtime_vars['_debug_mode']
-
-        # after runtime closure, should be reverted!
-        assert not tractor._state._runtime_vars['_debug_mode']
-
-    trio.run(main)

tractor/_context.py

@@ -292,7 +292,7 @@ class Context:
     # - `._runtime._invoke()` will check this flag before engaging
     #   the crash handler REPL in such cases where the "callee"
     #   raises the cancellation,
-    # - `.devx.debug.lock_stdio_for_peer()` will set it to `False` if
+    # - `.devx._debug.lock_stdio_for_peer()` will set it to `False` if
     #   the global tty-lock has been configured to filter out some
     #   actors from being able to acquire the debugger lock.
     _enter_debugger_on_cancel: bool = True
@@ -1069,25 +1069,9 @@ class Context:
         |RemoteActorError  # stream overrun caused and ignored by us
     ):
         '''
-        Maybe raise a remote error depending on the type of error and
-        *who*, i.e. which side of the task pair across actors,
-        requested a cancellation (if any).
-
-        Depending on the input config-params suppress raising
-        certain remote excs:
-
-        - if `remote_error: ContextCancelled` (ctxc) AND this side's
-          task is the "requester", it at somem point called
-          `Context.cancel()`, then the peer's ctxc is treated
-          as a "cancel ack".
-
-         |_ this behaves exactly like how `trio.Nursery.cancel_scope`
-            absorbs any `BaseExceptionGroup[trio.Cancelled]` wherein the
-            owning parent task never will raise a `trio.Cancelled`
-            if `CancelScope.cancel_called == True`.
-
-        - `remote_error: StreamOverrrun` (overrun) AND
-           `raise_overrun_from_self` is set.
+        Maybe raise a remote error depending on the type of error
+        and *who* (i.e. which task from which actor) requested
+        a  cancellation (if any).
 
         '''
         __tracebackhide__: bool = hide_tb
@@ -1129,19 +1113,18 @@ class Context:
             # for this ^, NO right?
 
         ) or (
-            # NOTE: whenever this side is the cause of an
-            # overrun on the peer side, i.e. we sent msgs too
-            # fast and the peer task was overrun according
-            # to `MsgStream` buffer settings, AND this was
-            # called with `raise_overrun_from_self=True` (the
-            # default), silently absorb any `StreamOverrun`.
-            #
-            # XXX, this is namely useful for supressing such faults
-            # during cancellation/error/final-result handling inside
-            # `.msg._ops.drain_to_final_msg()` such that we do not
-            # raise during a cancellation-request, i.e. when
+            # NOTE: whenever this context is the cause of an
+            # overrun on the remote side (aka we sent msgs too
+            # fast that the remote task was overrun according
+            # to `MsgStream` buffer settings) AND the caller
+            # has requested to not raise overruns this side
+            # caused, we also silently absorb any remotely
+            # boxed `StreamOverrun`. This is mostly useful for
+            # supressing such faults during
+            # cancellation/error/final-result handling inside
+            # `msg._ops.drain_to_final_msg()` such that we do not
+            # raise such errors particularly in the case where
             # `._cancel_called == True`.
-            #
             not raise_overrun_from_self
             and isinstance(remote_error, RemoteActorError)
             and remote_error.boxed_type is StreamOverrun
@@ -1251,8 +1234,8 @@ class Context:
 
             # ?XXX, should already be set in `._deliver_msg()` right?
             if self._outcome_msg is not Unresolved:
-                # from .devx import debug
-                # await debug.pause()
+                # from .devx import _debug
+                # await _debug.pause()
                 assert self._outcome_msg is outcome_msg
             else:
                 self._outcome_msg = outcome_msg
@@ -2187,7 +2170,7 @@ async def open_context_from_portal(
         #   debugging the tractor-runtime itself using it's
         #   own `.devx.` tooling!
         # 
-        # await debug.pause()
+        # await _debug.pause()
 
         # CASE 2: context was cancelled by local task calling
         # `.cancel()`, we don't raise and the exit block should
@@ -2254,7 +2237,7 @@ async def open_context_from_portal(
         # NOTE: `Context.cancel()` is conversely NEVER CALLED in
         # the `ContextCancelled` "self cancellation absorbed" case
         # handled in the block above ^^^ !!
-        # await debug.pause()
+        # await _debug.pause()
         # log.cancel(
         match scope_err:
             case trio.Cancelled:
@@ -2269,11 +2252,11 @@ async def open_context_from_portal(
         )
 
         if debug_mode():
-            # async with debug.acquire_debug_lock(portal.actor.uid):
+            # async with _debug.acquire_debug_lock(portal.actor.uid):
             #     pass
             # TODO: factor ^ into below for non-root cases?
             #
-            from .devx.debug import maybe_wait_for_debugger
+            from .devx._debug import maybe_wait_for_debugger
             was_acquired: bool = await maybe_wait_for_debugger(
                 # header_msg=(
                 #     'Delaying `ctx.cancel()` until debug lock '
@@ -2336,8 +2319,8 @@ async def open_context_from_portal(
                 raise
 
             # yes this worx!
-            # from .devx import debug
-            # await debug.pause()
+            # from .devx import _debug
+            # await _debug.pause()
 
             # an exception type boxed in a `RemoteActorError`
             # is returned (meaning it was obvi not raised)
@@ -2372,7 +2355,7 @@ async def open_context_from_portal(
         # where the root is waiting on the lock to clear but the
         # child has already cleared it and clobbered IPC.
         if debug_mode():
-            from .devx.debug import maybe_wait_for_debugger
+            from .devx._debug import maybe_wait_for_debugger
             await maybe_wait_for_debugger()
 
         # though it should be impossible for any tasks

tractor/_discovery.py

@@ -48,6 +48,7 @@ from ._state import (
 
 if TYPE_CHECKING:
     from ._runtime import Actor
+    from .ipc._server import IPCServer
 
 
 log = get_logger(__name__)
@@ -79,7 +80,7 @@ async def get_registry(
         )
     else:
         # TODO: try to look pre-existing connection from
-        # `Server._peers` and use it instead?
+        # `IPCServer._peers` and use it instead?
         async with (
             _connect_chan(addr) as chan,
             open_portal(chan) as regstr_ptl,
@@ -111,22 +112,22 @@ def get_peer_by_name(
 ) -> list[Channel]|None:  # at least 1
     '''
     Scan for an existing connection (set) to a named actor
-    and return any channels from `Server._peers: dict`.
+    and return any channels from `IPCServer._peers: dict`.
 
     This is an optimization method over querying the registrar for
     the same info.
 
     '''
     actor: Actor = current_actor()
-    to_scan: dict[tuple, list[Channel]] = actor.ipc_server._peers.copy()
+    server: IPCServer = actor.ipc_server
+    to_scan: dict[tuple, list[Channel]] = server._peers.copy()
 
     # TODO: is this ever needed? creates a duplicate channel on actor._peers
     # when multiple find_actor calls are made to same actor from a single ctx
     # which causes actor exit to hang waiting forever on
     # `actor._no_more_peers.wait()` in `_runtime.async_main`
-
     # pchan: Channel|None = actor._parent_chan
-    # if pchan and pchan.uid not in to_scan:
+    # if pchan:
     #     to_scan[pchan.uid].append(pchan)
 
     for aid, chans in to_scan.items():

tractor/_entry.py

@@ -22,6 +22,7 @@ from __future__ import annotations
 from functools import partial
 import multiprocessing as mp
 import os
+import textwrap
 from typing import (
     Any,
     TYPE_CHECKING,
@@ -34,10 +35,7 @@ from .log import (
     get_logger,
 )
 from . import _state
-from .devx import (
-    _frame_stack,
-    pformat,
-)
+from .devx import _debug
 from .to_asyncio import run_as_asyncio_guest
 from ._addr import UnwrappedAddress
 from ._runtime import (
@@ -105,6 +103,107 @@ def _mp_main(
         )
 
 
+# TODO: move this func to some kinda `.devx._conc_lang.py` eventually
+# as we work out our multi-domain state-flow-syntax!
+def nest_from_op(
+    input_op: str,
+    #
+    # ?TODO? an idea for a syntax to the state of concurrent systems
+    # as a "3-domain" (execution, scope, storage) model and using
+    # a minimal ascii/utf-8 operator-set.
+    #
+    # try not to take any of this seriously yet XD
+    #
+    # > is a "play operator" indicating (CPU bound)
+    #   exec/work/ops required at the "lowest level computing"
+    #
+    # execution primititves (tasks, threads, actors..) denote their
+    # lifetime with '(' and ')' since parentheses normally are used
+    # in many langs to denote function calls.
+    #
+    # starting = (
+    # >(  opening/starting; beginning of the thread-of-exec (toe?)
+    # (>  opened/started,  (finished spawning toe)
+    # |_<Task: blah blah..>  repr of toe, in py these look like <objs>
+    #
+    # >) closing/exiting/stopping,
+    # )> closed/exited/stopped,
+    # |_<Task: blah blah..>
+    #   [OR <), )< ?? ]
+    #
+    # ending = )
+    # >c) cancelling to close/exit
+    # c)> cancelled (caused close), OR?
+    #  |_<Actor: ..>
+    #   OR maybe "<c)" which better indicates the cancel being
+    #   "delivered/returned" / returned" to LHS?
+    #
+    # >x)  erroring to eventuall exit
+    # x)>  errored and terminated
+    #  |_<Actor: ...>
+    #
+    # scopes: supers/nurseries, IPC-ctxs, sessions, perms, etc.
+    # >{  opening
+    # {>  opened
+    # }>  closed
+    # >}  closing
+    #
+    # storage: like queues, shm-buffers, files, etc..
+    # >[  opening
+    # [>  opened
+    #  |_<FileObj: ..>
+    #
+    # >]  closing
+    # ]>  closed
+
+    # IPC ops: channels, transports, msging
+    # =>  req msg
+    # <=  resp msg
+    # <=> 2-way streaming (of msgs)
+    # <-  recv 1 msg
+    # ->  send 1 msg
+    #
+    # TODO: still not sure on R/L-HS approach..?
+    # =>(  send-req to exec start (task, actor, thread..)
+    # (<=  recv-req to ^
+    #
+    # (<=  recv-req ^
+    # <=(  recv-resp opened remote exec primitive
+    # <=)  recv-resp closed
+    #
+    # )<=c req to stop due to cancel
+    # c=>) req to stop due to cancel
+    #
+    # =>{  recv-req to open
+    # <={  send-status that it closed
+
+    tree_str: str,
+
+    # NOTE: so move back-from-the-left of the `input_op` by
+    # this amount.
+    back_from_op: int = 0,
+) -> str:
+    '''
+    Depth-increment the input (presumably hierarchy/supervision)
+    input "tree string" below the provided `input_op` execution
+    operator, so injecting a `"\n|_{input_op}\n"`and indenting the
+    `tree_str` to nest content aligned with the ops last char.
+
+    '''
+    return (
+        f'{input_op}\n'
+        +
+        textwrap.indent(
+            tree_str,
+            prefix=(
+                len(input_op)
+                -
+                (back_from_op + 1)
+            ) * ' ',
+        )
+    )
+
+
 def _trio_main(
     actor: Actor,
     *,
@@ -116,7 +215,7 @@ def _trio_main(
     Entry point for a `trio_run_in_process` subactor.
 
     '''
-    _frame_stack.hide_runtime_frames()
+    _debug.hide_runtime_frames()
 
     _state._current_actor = actor
     trio_main = partial(
@@ -135,22 +234,22 @@ def _trio_main(
             f'  loglevel: {actor.loglevel}\n'
         )
         log.info(
-            'Starting new `trio` subactor\n'
+            'Starting new `trio` subactor:\n'
             +
-            pformat.nest_from_op(
+            nest_from_op(
                 input_op='>(',  # see syntax ideas above
-                text=actor_info,
-                nest_indent=2,  # since "complete"
+                tree_str=actor_info,
+                back_from_op=2,  # since "complete"
             )
         )
     logmeth = log.info
     exit_status: str = (
         'Subactor exited\n'
         +
-        pformat.nest_from_op(
+        nest_from_op(
             input_op=')>',  # like a "closed-to-play"-icon from super perspective
-            text=actor_info,
-            nest_indent=1,
+            tree_str=actor_info,
+            back_from_op=1,
         )
     )
     try:
@@ -165,9 +264,9 @@ def _trio_main(
         exit_status: str = (
             'Actor received KBI (aka an OS-cancel)\n'
             +
-            pformat.nest_from_op(
+            nest_from_op(
                 input_op='c)>',  # closed due to cancel (see above)
-                text=actor_info,
+                tree_str=actor_info,
             )
         )
     except BaseException as err:
@@ -175,9 +274,9 @@ def _trio_main(
         exit_status: str = (
             'Main actor task exited due to crash?\n'
             +
-            pformat.nest_from_op(
+            nest_from_op(
                 input_op='x)>',  # closed by error
-                text=actor_info,
+                tree_str=actor_info,
             )
         )
         # NOTE since we raise a tb will already be shown on the

tractor/_portal.py

@@ -582,7 +582,8 @@ async def open_portal(
             msg_loop_cs = await tn.start(
                 partial(
                     _rpc.process_messages,
-                    chan=channel,
+                    actor,
+                    channel,
                     # if the local task is cancelled we want to keep
                     # the msg loop running until our block ends
                     shield=True,

tractor/_root.py

@@ -44,10 +44,7 @@ from ._runtime import (
     # Arbiter as Registry,
     async_main,
 )
-from .devx import (
-    debug,
-    _frame_stack,
-)
+from .devx import _debug
 from . import _spawn
 from . import _state
 from . import log
@@ -70,7 +67,7 @@ from ._exceptions import (
 logger = log.get_logger('tractor')
 
 
-# TODO: stick this in a `@acm` defined in `devx.debug`?
+# TODO: stick this in a `@acm` defined in `devx._debug`?
 # -[ ] also maybe consider making this a `wrapt`-deco to
 #     save an indent level?
 #
@@ -92,7 +89,7 @@ async def maybe_block_bp(
         debug_mode
         and maybe_enable_greenback
         and (
-            maybe_mod := await debug.maybe_init_greenback(
+            maybe_mod := await _debug.maybe_init_greenback(
                 raise_not_found=False,
             )
         )
@@ -102,7 +99,7 @@ async def maybe_block_bp(
             'Enabling `tractor.pause_from_sync()` support!\n'
         )
         os.environ['PYTHONBREAKPOINT'] = (
-            'tractor.devx.debug._sync_pause_from_builtin'
+            'tractor.devx._debug._sync_pause_from_builtin'
         )
         _state._runtime_vars['use_greenback'] = True
         bp_blocked = False
@@ -166,9 +163,7 @@ async def open_root_actor(
 
     # enables the multi-process debugger support
     debug_mode: bool = False,
-    maybe_enable_greenback: bool = False,  # `.pause_from_sync()/breakpoint()` support
-    # ^XXX NOTE^ the perf implications of use,
-    # https://greenback.readthedocs.io/en/latest/principle.html#performance
+    maybe_enable_greenback: bool = True,  # `.pause_from_sync()/breakpoint()` support
     enable_stack_on_sig: bool = False,
 
     # internal logging
@@ -183,7 +178,7 @@ async def open_root_actor(
 
     hide_tb: bool = True,
 
-    # XXX, proxied directly to `.devx.debug._maybe_enter_pm()`
+    # XXX, proxied directly to `.devx._debug._maybe_enter_pm()`
     # for REPL-entry logic.
     debug_filter: Callable[
         [BaseException|BaseExceptionGroup],
@@ -222,23 +217,18 @@ async def open_root_actor(
     ):
         if enable_transports is None:
             enable_transports: list[str] = _state.current_ipc_protos()
-        else:
-            _state._runtime_vars['_enable_tpts'] = enable_transports
 
-        # TODO! support multi-tpts per actor!
-        # Bo
-        if not len(enable_transports) == 1:
-            raise RuntimeError(
-                f'No multi-tpt support yet!\n'
-                f'enable_transports={enable_transports!r}\n'
-            )
+            # TODO! support multi-tpts per actor! Bo
+            assert (
+                len(enable_transports) == 1
+            ), 'No multi-tpt support yet!'
 
-        _frame_stack.hide_runtime_frames()
+        _debug.hide_runtime_frames()
         __tracebackhide__: bool = hide_tb
 
         # attempt to retreive ``trio``'s sigint handler and stash it
         # on our debugger lock state.
-        debug.DebugStatus._trio_handler = signal.getsignal(signal.SIGINT)
+        _debug.DebugStatus._trio_handler = signal.getsignal(signal.SIGINT)
 
         # mark top most level process as root actor
         _state._runtime_vars['_is_root'] = True
@@ -286,14 +276,13 @@ async def open_root_actor(
 
         if (
             debug_mode
-            and
-            _spawn._spawn_method == 'trio'
+            and _spawn._spawn_method == 'trio'
         ):
             _state._runtime_vars['_debug_mode'] = True
 
             # expose internal debug module to every actor allowing for
             # use of ``await tractor.pause()``
-            enable_modules.append('tractor.devx.debug._tty_lock')
+            enable_modules.append('tractor.devx._debug')
 
             # if debug mode get's enabled *at least* use that level of
             # logging for some informative console prompts.
@@ -475,7 +464,7 @@ async def open_root_actor(
                     # TODO, in beginning to handle the subsubactor with
                     # crashed grandparent cases..
                     #
-                    # was_locked: bool = await debug.maybe_wait_for_debugger(
+                    # was_locked: bool = await _debug.maybe_wait_for_debugger(
                     #     child_in_debug=True,
                     # )
                     # XXX NOTE XXX see equiv note inside
@@ -483,7 +472,7 @@ async def open_root_actor(
                     # non-root or root-that-opened-this-mahually case we
                     # wait for the local actor-nursery to exit before
                     # exiting the transport channel handler.
-                    entered: bool = await debug._maybe_enter_pm(
+                    entered: bool = await _debug._maybe_enter_pm(
                         err,
                         api_frame=inspect.currentframe(),
                         debug_filter=debug_filter,
@@ -523,17 +512,8 @@ async def open_root_actor(
                     )
                     await actor.cancel(None)  # self cancel
         finally:
-            # revert all process-global runtime state
-            if (
-                debug_mode
-                and
-                _spawn._spawn_method == 'trio'
-            ):
-                _state._runtime_vars['_debug_mode'] = False
-
             _state._current_actor = None
             _state._last_actor_terminated = actor
-
             logger.runtime(
                 f'Root actor terminated\n'
                 f')>\n'

tractor/_rpc.py

@@ -57,7 +57,7 @@ from ._exceptions import (
     unpack_error,
 )
 from .devx import (
-    debug,
+    _debug,
     add_div,
 )
 from . import _state
@@ -266,7 +266,7 @@ async def _errors_relayed_via_ipc(
 
     # TODO: a debug nursery when in debug mode!
     # async with maybe_open_debugger_nursery() as debug_tn:
-    # => see matching comment in side `.debug._pause()`
+    # => see matching comment in side `._debug._pause()`
     rpc_err: BaseException|None = None
     try:
         yield  # run RPC invoke body
@@ -318,7 +318,7 @@ async def _errors_relayed_via_ipc(
                     'RPC task crashed, attempting to enter debugger\n'
                     f'|_{ctx}'
                 )
-                entered_debug = await debug._maybe_enter_pm(
+                entered_debug = await _debug._maybe_enter_pm(
                     err,
                     api_frame=inspect.currentframe(),
                 )
@@ -462,7 +462,7 @@ async def _invoke(
     ):
         # XXX for .pause_from_sync()` usage we need to make sure
         # `greenback` is boostrapped in the subactor!
-        await debug.maybe_init_greenback()
+        await _debug.maybe_init_greenback()
 
     # TODO: possibly a specially formatted traceback
     # (not sure what typing is for this..)?
@@ -751,7 +751,7 @@ async def _invoke(
                 and 'Cancel scope stack corrupted' in scope_error.args[0]
             ):
                 log.exception('Cancel scope stack corrupted!?\n')
-                # debug.mk_pdb().set_trace()
+                # _debug.mk_pdb().set_trace()
 
             # always set this (child) side's exception as the
             # local error on the context
@@ -779,7 +779,7 @@ async def _invoke(
 
             # don't pop the local context until we know the
             # associated child isn't in debug any more
-            await debug.maybe_wait_for_debugger()
+            await _debug.maybe_wait_for_debugger()
             ctx: Context = actor._contexts.pop((
                 chan.uid,
                 cid,
@@ -869,6 +869,7 @@ async def try_ship_error_to_remote(
 
 
 async def process_messages(
+    actor: Actor,
     chan: Channel,
     shield: bool = False,
     task_status: TaskStatus[CancelScope] = trio.TASK_STATUS_IGNORED,
@@ -906,7 +907,6 @@ async def process_messages(
       (as utilized inside `Portal.cancel_actor()` ).
 
     '''
-    actor: Actor = _state.current_actor()
     assert actor._service_n  # runtime state sanity
 
     # TODO: once `trio` get's an "obvious way" for req/resp we
@@ -983,7 +983,7 @@ async def process_messages(
                         # XXX NOTE XXX don't start entire actor
                         # runtime cancellation if this actor is
                         # currently in debug mode!
-                        pdb_complete: trio.Event|None = debug.DebugStatus.repl_release
+                        pdb_complete: trio.Event|None = _debug.DebugStatus.repl_release
                         if pdb_complete:
                             await pdb_complete.wait()
 

tractor/_runtime.py

@@ -44,7 +44,6 @@ from functools import partial
 import importlib
 import importlib.util
 import os
-from pathlib import Path
 from pprint import pformat
 import signal
 import sys
@@ -97,7 +96,7 @@ from ._exceptions import (
     MsgTypeError,
     unpack_error,
 )
-from .devx import debug
+from .devx import _debug
 from ._discovery import get_registry
 from ._portal import Portal
 from . import _state
@@ -112,22 +111,8 @@ if TYPE_CHECKING:
 log = get_logger('tractor')
 
 
-def _get_mod_abspath(module: ModuleType) -> Path:
-    return Path(module.__file__).absolute()
-
-
-def get_mod_nsps2fps(mod_ns_paths: list[str]) -> dict[str, str]:
-    '''
-    Deliver a table of py module namespace-path-`str`s mapped to
-    their "physical" `.py` file paths in the file-sys.
-
-    '''
-    nsp2fp: dict[str, str] = {}
-    for nsp in mod_ns_paths:
-        mod: ModuleType = importlib.import_module(nsp)
-        nsp2fp[nsp] = str(_get_mod_abspath(mod))
-
-    return nsp2fp
+def _get_mod_abspath(module):
+    return os.path.abspath(module.__file__)
 
 
 class Actor:
@@ -234,14 +219,13 @@ class Actor:
         # will be passed to children
         self._parent_main_data = _mp_fixup_main._mp_figure_out_main()
 
-        # TODO? only add this when `is_debug_mode() == True` no?
         # always include debugging tools module
-        if _state.is_root_process():
-            enable_modules.append('tractor.devx.debug._tty_lock')
+        enable_modules.append('tractor.devx._debug')
 
-        self.enable_modules: dict[str, str] = get_mod_nsps2fps(
-            mod_ns_paths=enable_modules,
-        )
+        self.enable_modules: dict[str, str] = {}
+        for name in enable_modules:
+            mod: ModuleType = importlib.import_module(name)
+            self.enable_modules[name] = _get_mod_abspath(mod)
 
         self._mods: dict[str, ModuleType] = {}
         self.loglevel: str = loglevel
@@ -407,6 +391,7 @@ class Actor:
 
     def load_modules(
         self,
+        # debug_mode: bool = False,
     ) -> None:
         '''
         Load explicitly enabled python modules from local fs after
@@ -428,9 +413,6 @@ class Actor:
                         parent_data['init_main_from_path'])
 
             status: str = 'Attempting to import enabled modules:\n'
-
-            modpath: str
-            filepath: str
             for modpath, filepath in self.enable_modules.items():
                 # XXX append the allowed module to the python path which
                 # should allow for relative (at least downward) imports.
@@ -747,33 +729,25 @@ class Actor:
                             f'Received invalid non-`SpawnSpec` payload !?\n'
                             f'{spawnspec}\n'
                         )
-                # ^^XXX TODO XXX^^^
-                # when the `SpawnSpec` fails to decode the above will
-                # raise a `MsgTypeError` which if we do NOT ALSO
-                # RAISE it will tried to be pprinted in the
-                # log.runtime() below..
+
+                # ^^TODO XXX!! when the `SpawnSpec` fails to decode
+                # the above will raise a `MsgTypeError` which if we
+                # do NOT ALSO RAISE it will tried to be pprinted in
+                # the log.runtime() below..
                 #
                 # SO we gotta look at how other `chan.recv()` calls
                 # are wrapped and do the same for this spec receive!
                 # -[ ] see `._rpc` likely has the answer?
-
-                # ^^^XXX NOTE XXX^^^, can't be called here!
                 #
+                # XXX NOTE, can't be called here in subactor
+                # bc we haven't yet received the
+                # `SpawnSpec._runtime_vars: dict` which would
+                # declare whether `debug_mode` is set!
                 # breakpoint()
                 # import pdbp; pdbp.set_trace()
-                #
-                # => bc we haven't yet received the
-                # `spawnspec._runtime_vars` which contains
-                # `debug_mode: bool`..
-
-                # `SpawnSpec.bind_addrs`
-                #  ---------------------
                 accept_addrs: list[UnwrappedAddress] = spawnspec.bind_addrs
 
-                # `SpawnSpec._runtime_vars`
-                # -------------------------
-                # => update process-wide globals
-                # TODO! -[ ] another `Struct` for rtvs..
+                # TODO: another `Struct` for rtvs..
                 rvs: dict[str, Any] = spawnspec._runtime_vars
                 if rvs['_debug_mode']:
                     from .devx import (
@@ -831,20 +805,18 @@ class Actor:
                         f'self._infected_aio = {aio_attr}\n'
                     )
                 if aio_rtv:
-                    assert (
-                        trio_runtime.GLOBAL_RUN_CONTEXT.runner.is_guest
-                        # and
-                        # ^TODO^ possibly add a `sniffio` or
-                        # `trio` pub-API for `is_guest_mode()`?
-                    )
+                    assert trio_runtime.GLOBAL_RUN_CONTEXT.runner.is_guest
+                    # ^TODO^ possibly add a `sniffio` or
+                    # `trio` pub-API for `is_guest_mode()`?
 
                 rvs['_is_root'] = False  # obvi XD
 
+                # update process-wide globals
                 _state._runtime_vars.update(rvs)
 
-                # `SpawnSpec.reg_addrs`
-                # ---------------------
-                # => update parent provided registrar contact info
+                # XXX: ``msgspec`` doesn't support serializing tuples
+                # so just cash manually here since it's what our
+                # internals expect.
                 #
                 self.reg_addrs = [
                     # TODO: we don't really NEED these as tuples?
@@ -855,29 +827,19 @@ class Actor:
                     for val in spawnspec.reg_addrs
                 ]
 
-                # `SpawnSpec.enable_modules`
-                # ---------------------
-                # => extend RPC-python-module (capabilities) with
-                #   those permitted by parent.
-                #
-                # NOTE, only the root actor should have
-                # a pre-permitted entry for `.devx.debug._tty_lock`.
-                assert not self.enable_modules
-                self.enable_modules.update(
-                    spawnspec.enable_modules
-                )
-
-                self._parent_main_data = spawnspec._parent_main_data
-                # XXX QUESTION(s)^^^
-                # -[ ] already set in `.__init__()` right, but how is
-                #      it diff from this blatant parent copy?
-                #    -[ ] do we need/want the .__init__() value in
-                #       just the root case orr?
+                # TODO: better then monkey patching..
+                # -[ ] maybe read the actual f#$-in `._spawn_spec` XD
+                for _, attr, value in pretty_struct.iter_fields(
+                    spawnspec,
+                ):
+                    setattr(self, attr, value)
 
             return (
                 chan,
                 accept_addrs,
-                _state._runtime_vars['_enable_tpts']
+                None,
+                # ^TODO, preferred tpts list from rent!
+                # -[ ] need to extend the `SpawnSpec` tho!
             )
 
         # failed to connect back?
@@ -968,7 +930,7 @@ class Actor:
 
             # kill any debugger request task to avoid deadlock
             # with the root actor in this tree
-            debug_req = debug.DebugStatus
+            debug_req = _debug.DebugStatus
             lock_req_ctx: Context = debug_req.req_ctx
             if (
                 lock_req_ctx
@@ -978,7 +940,7 @@ class Actor:
                 msg += (
                     f'\n'
                     f'-> Cancelling active debugger request..\n'
-                    f'|_{debug.Lock.repr()}\n\n'
+                    f'|_{_debug.Lock.repr()}\n\n'
                     f'|_{lock_req_ctx}\n\n'
                 )
                 # lock_req_ctx._scope.cancel()
@@ -1300,15 +1262,11 @@ async def async_main(
     the actor's "runtime" and all thus all ongoing RPC tasks.
 
     '''
-    # XXX NOTE, `_state._current_actor` **must** be set prior to
-    # calling this core runtime entrypoint!
-    assert actor is _state.current_actor()
-
     actor._task: trio.Task = trio.lowlevel.current_task()
 
     # attempt to retreive ``trio``'s sigint handler and stash it
     # on our debugger state.
-    debug.DebugStatus._trio_handler = signal.getsignal(signal.SIGINT)
+    _debug.DebugStatus._trio_handler = signal.getsignal(signal.SIGINT)
 
     is_registered: bool = False
     try:
@@ -1363,6 +1321,7 @@ async def async_main(
                 ) as service_nursery,
 
                 _server.open_ipc_server(
+                    actor=actor,
                     parent_tn=service_nursery,
                     stream_handler_tn=service_nursery,
                 ) as ipc_server,
@@ -1401,7 +1360,7 @@ async def async_main(
                 # try:
                 #     actor.load_modules()
                 # except ModuleNotFoundError as err:
-                #     debug.pause_from_sync()
+                #     _debug.pause_from_sync()
                 #     import pdbp; pdbp.set_trace()
                 #     raise
 
@@ -1416,6 +1375,7 @@ async def async_main(
                         'Booting IPC server'
                     )
                     eps: list = await ipc_server.listen_on(
+                        actor=actor,
                         accept_addrs=accept_addrs,
                         stream_handler_nursery=service_nursery,
                     )
@@ -1433,7 +1393,7 @@ async def async_main(
                     # tranport address bind errors - normally it's
                     # something silly like the wrong socket-address
                     # passed via a config or CLI Bo
-                    entered_debug: bool = await debug._maybe_enter_pm(
+                    entered_debug: bool = await _debug._maybe_enter_pm(
                         oserr,
                     )
                     if not entered_debug:
@@ -1451,12 +1411,10 @@ async def async_main(
                 # all sub-actors should be able to speak to
                 # their root actor over that channel.
                 if _state._runtime_vars['_is_root']:
-                    raddrs: list[Address] = _state._runtime_vars['_root_addrs']
                     for addr in accept_addrs:
-                        waddr: Address = wrap_address(addr)
-                        raddrs.append(addr)
-                    else:
-                        _state._runtime_vars['_root_mailbox'] = raddrs[0]
+                        waddr = wrap_address(addr)
+                        if waddr == waddr.get_root():
+                            _state._runtime_vars['_root_mailbox'] = addr
 
                 # Register with the arbiter if we're told its addr
                 log.runtime(
@@ -1473,7 +1431,7 @@ async def async_main(
                         waddr = wrap_address(addr)
                         assert waddr.is_valid
                     except AssertionError:
-                        await debug.pause()
+                        await _debug.pause()
 
                     async with get_registry(addr) as reg_portal:
                         for accept_addr in accept_addrs:
@@ -1502,7 +1460,8 @@ async def async_main(
                     await root_nursery.start(
                         partial(
                             _rpc.process_messages,
-                            chan=actor._parent_chan,
+                            actor,
+                            actor._parent_chan,
                             shield=True,
                         )
                     )
@@ -1590,7 +1549,7 @@ async def async_main(
             # prevents any `infected_aio` actor from continuing
             # and any callbacks in the `ls` here WILL NOT be
             # called!!
-            # await debug.pause(shield=True)
+            # await _debug.pause(shield=True)
 
         ls.close()
 
@@ -1603,7 +1562,7 @@ async def async_main(
         #
         # if actor.name == 'brokerd.ib':
         #     with CancelScope(shield=True):
-        #         await debug.breakpoint()
+        #         await _debug.breakpoint()
 
         # Unregister actor from the registry-sys / registrar.
         if (
@@ -1792,7 +1751,7 @@ class Arbiter(Actor):
         waddr: Address = wrap_address(addr)
         if not waddr.is_valid:
             # should never be 0-dynamic-os-alloc
-            await debug.pause()
+            await _debug.pause()
 
         self._registry[uid] = addr
 

tractor/_spawn.py

@@ -34,7 +34,7 @@ from typing import (
 import trio
 from trio import TaskStatus
 
-from .devx.debug import (
+from .devx._debug import (
     maybe_wait_for_debugger,
     acquire_debug_lock,
 )

tractor/_state.py

@@ -37,39 +37,20 @@ if TYPE_CHECKING:
     from ._context import Context
 
 
-# default IPC transport protocol settings
-TransportProtocolKey = Literal[
-    'tcp',
-    'uds',
-]
-_def_tpt_proto: TransportProtocolKey = 'tcp'
-
 _current_actor: Actor|None = None  # type: ignore # noqa
 _last_actor_terminated: Actor|None = None
 
 # TODO: mk this a `msgspec.Struct`!
-# -[ ] type out all fields obvi!
-# -[ ] (eventually) mk wire-ready for monitoring?
 _runtime_vars: dict[str, Any] = {
-    # root of actor-process tree info
-    '_is_root': False,  # bool
-    '_root_mailbox': (None, None),  # tuple[str|None, str|None]
-    '_root_addrs': [],  # tuple[str|None, str|None]
-
-    # parent->chld ipc protocol caps
-    '_enable_tpts': [_def_tpt_proto],
-
-    # registrar info
+    '_debug_mode': False,
+    '_is_root': False,
+    '_root_mailbox': (None, None),
     '_registry_addrs': [],
 
-    # `debug_mode: bool` settings
-    '_debug_mode': False,  # bool
-    'repl_fixture': False,  # |AbstractContextManager[bool]
+    '_is_infected_aio': False,
+
     # for `tractor.pause_from_sync()` & `breakpoint()` support
     'use_greenback': False,
-
-    # infected-`asyncio`-mode: `trio` running as guest.
-    '_is_infected_aio': False,
 }
 
 
@@ -191,6 +172,14 @@ def get_rt_dir(
     return rtdir
 
 
+# default IPC transport protocol settings
+TransportProtocolKey = Literal[
+    'tcp',
+    'uds',
+]
+_def_tpt_proto: TransportProtocolKey = 'tcp'
+
+
 def current_ipc_protos() -> list[str]:
     '''
     Return the list of IPC transport protocol keys currently
@@ -200,4 +189,4 @@ def current_ipc_protos() -> list[str]:
     concrete-backend sub-types defined throughout `tractor.ipc`.
 
     '''
-    return _runtime_vars['_enable_tpts']
+    return [_def_tpt_proto]

tractor/_streaming.py

@@ -426,8 +426,8 @@ class MsgStream(trio.abc.Channel):
             self._closed = re
 
         # if caught_eoc:
-        #     # from .devx import debug
-        #     # await debug.pause()
+        #     # from .devx import _debug
+        #     # await _debug.pause()
         #     with trio.CancelScope(shield=True):
         #         await rx_chan.aclose()
 

tractor/_supervise.py

@@ -31,7 +31,7 @@ import warnings
 import trio
 
 
-from .devx.debug import maybe_wait_for_debugger
+from .devx._debug import maybe_wait_for_debugger
 from ._addr import (
     UnwrappedAddress,
     mk_uuid,

tractor/_testing/__init__.py

@@ -26,7 +26,7 @@ import os
 import pathlib
 
 import tractor
-from tractor.devx.debug import (
+from tractor.devx._debug import (
     BoxedMaybeException,
 )
 from .pytest import (
@@ -37,9 +37,6 @@ from .fault_simulation import (
 )
 
 
-# TODO, use dulwhich for this instead?
-# -> we're going to likely need it (or something similar)
-#   for supporting hot-coad reload feats eventually anyway!
 def repodir() -> pathlib.Path:
     '''
     Return the abspath to the repo directory.

tractor/_testing/addr.py

@@ -1,70 +0,0 @@
-# tractor: structured concurrent "actors".
-# Copyright 2018-eternity Tyler Goodlet.
-
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Affero General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Affero General Public License for more details.
-
-# You should have received a copy of the GNU Affero General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-'''
-Random IPC addr generation for isolating
-the discovery space between test sessions.
-
-Might be eventually useful to expose as a util set from
-our `tractor.discovery` subsys?
-
-'''
-import random
-from typing import (
-    Type,
-)
-from tractor import (
-    _addr,
-)
-
-
-def get_rando_addr(
-    tpt_proto: str,
-    *,
-
-    # choose random port at import time
-    _rando_port: str = random.randint(1000, 9999)
-
-) -> tuple[str, str|int]:
-    '''
-    Used to globally override the runtime to the
-    per-test-session-dynamic addr so that all tests never conflict
-    with any other actor tree using the default.
-
-    '''
-    addr_type: Type[_addr.Addres] = _addr._address_types[tpt_proto]
-    def_reg_addr: tuple[str, int] = _addr._default_lo_addrs[tpt_proto]
-
-    # this is the "unwrapped" form expected to be passed to
-    # `.open_root_actor()` by test body.
-    testrun_reg_addr: tuple[str, int|str]
-    match tpt_proto:
-        case 'tcp':
-            testrun_reg_addr = (
-                addr_type.def_bindspace,
-                _rando_port,
-            )
-
-        # NOTE, file-name uniqueness (no-collisions) will be based on
-        # the runtime-directory and root (pytest-proc's) pid.
-        case 'uds':
-            testrun_reg_addr = addr_type.get_random().unwrap()
-
-    # XXX, as sanity it should never the same as the default for the
-    # host-singleton registry actor.
-    assert def_reg_addr != testrun_reg_addr
-
-    return testrun_reg_addr

tractor/_testing/pytest.py

@@ -26,46 +26,29 @@ from functools import (
 import inspect
 import platform
 
-import pytest
 import tractor
 import trio
 
 
 def tractor_test(fn):
     '''
-    Decorator for async test fns to decorator-wrap them as "native"
-    looking sync funcs runnable by `pytest` and auto invoked with
-    `trio.run()` (much like the `pytest-trio` plugin's approach).
+    Decorator for async test funcs to present them as "native"
+    looking sync funcs runnable by `pytest` using `trio.run()`.
 
-    Further the test fn body will be invoked AFTER booting the actor
-    runtime, i.e. from inside a `tractor.open_root_actor()` block AND
-    with various runtime and tooling parameters implicitly passed as
-    requested by by the test session's config; see immediately below.
+    Use:
 
-    Basic deco use:
-    ---------------
+    @tractor_test
+    async def test_whatever():
+        await ...
 
-      @tractor_test
-      async def test_whatever():
-          await ...
+    If fixtures:
 
+        - ``reg_addr`` (a socket addr tuple where arbiter is listening)
+        - ``loglevel`` (logging level passed to tractor internals)
+        - ``start_method`` (subprocess spawning backend)
 
-    Runtime config via special fixtures:
-    ------------------------------------
-    If any of the following fixture are requested by the wrapped test
-    fn (via normal func-args declaration),
-
-    - `reg_addr` (a socket addr tuple where arbiter is listening)
-    - `loglevel` (logging level passed to tractor internals)
-    - `start_method` (subprocess spawning backend)
-
-    (TODO support)
-    - `tpt_proto` (IPC transport protocol key)
-
-    they will be automatically injected to each test as normally
-    expected as well as passed to the initial
-    `tractor.open_root_actor()` funcargs.
-
+    are defined in the `pytest` fixture space they will be automatically
+    injected to tests declaring these funcargs.
     '''
     @wraps(fn)
     def wrapper(
@@ -128,164 +111,3 @@ def tractor_test(fn):
         return trio.run(main)
 
     return wrapper
-
-
-def pytest_addoption(
-    parser: pytest.Parser,
-):
-    # parser.addoption(
-    #     "--ll",
-    #     action="store",
-    #     dest='loglevel',
-    #     default='ERROR', help="logging level to set when testing"
-    # )
-
-    parser.addoption(
-        "--spawn-backend",
-        action="store",
-        dest='spawn_backend',
-        default='trio',
-        help="Processing spawning backend to use for test run",
-    )
-
-    parser.addoption(
-        "--tpdb",
-        "--debug-mode",
-        action="store_true",
-        dest='tractor_debug_mode',
-        # default=False,
-        help=(
-            'Enable a flag that can be used by tests to to set the '
-            '`debug_mode: bool` for engaging the internal '
-            'multi-proc debugger sys.'
-        ),
-    )
-
-    # provide which IPC transport protocols opting-in test suites
-    # should accumulatively run against.
-    parser.addoption(
-        "--tpt-proto",
-        nargs='+',  # accumulate-multiple-args
-        action="store",
-        dest='tpt_protos',
-        default=['tcp'],
-        help="Transport protocol to use under the `tractor.ipc.Channel`",
-    )
-
-
-def pytest_configure(config):
-    backend = config.option.spawn_backend
-    tractor._spawn.try_set_start_method(backend)
-
-
-@pytest.fixture(scope='session')
-def debug_mode(request) -> bool:
-    '''
-    Flag state for whether `--tpdb` (for `tractor`-py-debugger)
-    was passed to the test run.
-
-    Normally tests should pass this directly to `.open_root_actor()`
-    to allow the user to opt into suite-wide crash handling.
-
-    '''
-    debug_mode: bool = request.config.option.tractor_debug_mode
-    return debug_mode
-
-
-@pytest.fixture(scope='session')
-def spawn_backend(request) -> str:
-    return request.config.option.spawn_backend
-
-
-@pytest.fixture(scope='session')
-def tpt_protos(request) -> list[str]:
-
-    # allow quoting on CLI
-    proto_keys: list[str] = [
-        proto_key.replace('"', '').replace("'", "")
-        for proto_key in request.config.option.tpt_protos
-    ]
-
-    # ?TODO, eventually support multiple protos per test-sesh?
-    if len(proto_keys) > 1:
-        pytest.fail(
-            'We only support one `--tpt-proto <key>` atm!\n'
-        )
-
-    # XXX ensure we support the protocol by name via lookup!
-    for proto_key in proto_keys:
-        addr_type = tractor._addr._address_types[proto_key]
-        assert addr_type.proto_key == proto_key
-
-    yield proto_keys
-
-
-@pytest.fixture(
-    scope='session',
-    autouse=True,
-)
-def tpt_proto(
-    tpt_protos: list[str],
-) -> str:
-    proto_key: str = tpt_protos[0]
-
-    from tractor import _state
-    if _state._def_tpt_proto != proto_key:
-        _state._def_tpt_proto = proto_key
-
-    yield proto_key
-
-
-@pytest.fixture(scope='session')
-def reg_addr(
-    tpt_proto: str,
-) -> tuple[str, int|str]:
-    '''
-    Deliver a test-sesh unique registry address such
-    that each run's (tests which use this fixture) will
-    have no conflicts/cross-talk when running simultaneously
-    nor will interfere with other live `tractor` apps active
-    on the same network-host (namespace).
-
-    '''
-    from tractor._testing.addr import get_rando_addr
-    return get_rando_addr(
-        tpt_proto=tpt_proto,
-    )
-
-
-def pytest_generate_tests(
-    metafunc: pytest.Metafunc,
-):
-    spawn_backend: str = metafunc.config.option.spawn_backend
-
-    if not spawn_backend:
-        # XXX some weird windows bug with `pytest`?
-        spawn_backend = 'trio'
-
-    # TODO: maybe just use the literal `._spawn.SpawnMethodKey`?
-    assert spawn_backend in (
-        'mp_spawn',
-        'mp_forkserver',
-        'trio',
-    )
-
-    # NOTE: used-to-be-used-to dyanmically parametrize tests for when
-    # you just passed --spawn-backend=`mp` on the cli, but now we expect
-    # that cli input to be manually specified, BUT, maybe we'll do
-    # something like this again in the future?
-    if 'start_method' in metafunc.fixturenames:
-        metafunc.parametrize(
-            "start_method",
-            [spawn_backend],
-            scope='module',
-        )
-
-    # TODO, parametrize any `tpt_proto: str` declaring tests!
-    # proto_tpts: list[str] = metafunc.config.option.proto_tpts
-    # if 'tpt_proto' in metafunc.fixturenames:
-    #     metafunc.parametrize(
-    #         'tpt_proto',
-    #         proto_tpts,  # TODO, double check this list usage!
-    #         scope='module',
-    #     )

tractor/_testing/samples.py

@@ -1,35 +1,99 @@
-import os
-import random
+import hashlib
+import numpy as np
 
 
-def generate_sample_messages(
-    amount: int,
-    rand_min: int = 0,
-    rand_max: int = 0,
-    silent: bool = False
-) -> tuple[list[bytes], int]:
+def generate_single_byte_msgs(amount: int) -> bytes:
+    '''
+    Generate a byte instance of length `amount` with repeating ASCII digits 0..9.
 
-    msgs = []
-    size = 0
+    '''
+    # array [0, 1, 2, ..., amount-1], take mod 10 => [0..9], and map 0->'0'(48)
+    # up to 9->'9'(57).
+    arr = np.arange(amount, dtype=np.uint8) % 10
+    # move into ascii space
+    arr += 48
+    return arr.tobytes()
 
-    if not silent:
-        print(f'\ngenerating {amount} messages...')
 
-    for i in range(amount):
-        msg = f'[{i:08}]'.encode('utf-8')
+class RandomBytesGenerator:
+    '''
+    Generate bytes msgs for tests.
 
-        if rand_max > 0:
-            msg += os.urandom(
-                random.randint(rand_min, rand_max))
+    messages will have the following format:
 
-        size += len(msg)
+        b'[{i:08}]' + random_bytes
 
-        msgs.append(msg)
+    so for message index 25:
 
-        if not silent and i and i % 10_000 == 0:
-            print(f'{i} generated')
+        b'[00000025]' + random_bytes
 
-    if not silent:
-        print(f'done, {size:,} bytes in total')
+    also generates sha256 hash of msgs.
 
-    return msgs, size
+    '''
+
+    def __init__(
+        self,
+        amount: int,
+        rand_min: int = 0,
+        rand_max: int = 0
+    ):
+        if rand_max < rand_min:
+            raise ValueError('rand_max must be >= rand_min')
+
+        self._amount = amount
+        self._rand_min = rand_min
+        self._rand_max = rand_max
+        self._index = 0
+        self._hasher = hashlib.sha256()
+        self._total_bytes = 0
+
+        self._lengths = np.random.randint(
+            rand_min,
+            rand_max + 1,
+            size=amount,
+            dtype=np.int32
+        )
+
+    def __iter__(self):
+        return self
+
+    def __next__(self) -> bytes:
+        if self._index == self._amount:
+            raise StopIteration
+
+        header = f'[{self._index:08}]'.encode('utf-8')
+
+        length = int(self._lengths[self._index])
+        msg = header + np.random.bytes(length)
+
+        self._hasher.update(msg)
+        self._total_bytes += length
+        self._index += 1
+
+        return msg
+
+    @property
+    def hexdigest(self) -> str:
+        return self._hasher.hexdigest()
+
+    @property
+    def total_bytes(self) -> int:
+        return self._total_bytes
+
+    @property
+    def total_msgs(self) -> int:
+        return self._amount
+
+    @property
+    def msgs_generated(self) -> int:
+        return self._index
+
+    @property
+    def recommended_log_interval(self) -> int:
+        max_msg_size = 10 + self._rand_max
+
+        if max_msg_size <= 32 * 1024:
+            return 10_000
+
+        else:
+            return 1000

tractor/devx/__init__.py

@@ -20,7 +20,7 @@ Runtime "developer experience" utils and addons to aid our
 and working with/on the actor runtime.
 
 """
-from .debug import (
+from ._debug import (
     maybe_wait_for_debugger as maybe_wait_for_debugger,
     acquire_debug_lock as acquire_debug_lock,
     breakpoint as breakpoint,

tractor/devx/_frame_stack.py

@@ -20,18 +20,13 @@ as it pertains to improving the grok-ability of our runtime!
 
 '''
 from __future__ import annotations
-from contextlib import (
-    _GeneratorContextManager,
-    _AsyncGeneratorContextManager,
-)
 from functools import partial
 import inspect
-import textwrap
 from types import (
     FrameType,
     FunctionType,
     MethodType,
-    CodeType,
+    # CodeType,
 )
 from typing import (
     Any,
@@ -39,9 +34,6 @@ from typing import (
     Type,
 )
 
-import pdbp
-from tractor.log import get_logger
-import trio
 from tractor.msg import (
     pretty_struct,
     NamespacePath,
@@ -49,8 +41,6 @@ from tractor.msg import (
 import wrapt
 
 
-log = get_logger(__name__)
-
 # TODO: yeah, i don't love this and we should prolly just
 # write a decorator that actually keeps a stupid ref to the func
 # obj..
@@ -311,70 +301,3 @@ def api_frame(
 #     error_set: set[BaseException],
 # ) -> TracebackType:
 #     ...
-
-
-def hide_runtime_frames() -> dict[FunctionType, CodeType]:
-    '''
-    Hide call-stack frames for various std-lib and `trio`-API primitives
-    such that the tracebacks presented from our runtime are as minimized
-    as possible, particularly from inside a `PdbREPL`.
-
-    '''
-    # XXX HACKZONE XXX
-    #  hide exit stack frames on nurseries and cancel-scopes!
-    # |_ so avoid seeing it when the `pdbp` REPL is first engaged from
-    #    inside a `trio.open_nursery()` scope (with no line after it
-    #    in before the block end??).
-    #
-    # TODO: FINALLY got this workin originally with
-    #  `@pdbp.hideframe` around the `wrapper()` def embedded inside
-    #  `_ki_protection_decoratior()`.. which is in the module:
-    #  /home/goodboy/.virtualenvs/tractor311/lib/python3.11/site-packages/trio/_core/_ki.py
-    #
-    # -[ ] make an issue and patch for `trio` core? maybe linked
-    #    to the long outstanding `pdb` one below?
-    #   |_ it's funny that there's frame hiding throughout `._run.py`
-    #      but not where it matters on the below exit funcs..
-    #
-    # -[ ] provide a patchset for the lonstanding
-    #   |_ https://github.com/python-trio/trio/issues/1155
-    #
-    # -[ ] make a linked issue to ^ and propose allowing all the
-    #     `._core._run` code to have their `__tracebackhide__` value
-    #     configurable by a `RunVar` to allow getting scheduler frames
-    #     if desired through configuration?
-    #
-    # -[ ] maybe dig into the core `pdb` issue why the extra frame is shown
-    #      at all?
-    #
-    funcs: list[FunctionType] = [
-        trio._core._run.NurseryManager.__aexit__,
-        trio._core._run.CancelScope.__exit__,
-         _GeneratorContextManager.__exit__,
-         _AsyncGeneratorContextManager.__aexit__,
-         _AsyncGeneratorContextManager.__aenter__,
-         trio.Event.wait,
-    ]
-    func_list_str: str = textwrap.indent(
-        "\n".join(f.__qualname__ for f in funcs),
-        prefix=' |_ ',
-    )
-    log.devx(
-        'Hiding the following runtime frames by default:\n'
-        f'{func_list_str}\n'
-    )
-
-    codes: dict[FunctionType, CodeType] = {}
-    for ref in funcs:
-        # stash a pre-modified version of each ref's code-obj
-        # so it can be reverted later if needed.
-        codes[ref] = ref.__code__
-        pdbp.hideframe(ref)
-    #
-    # pdbp.hideframe(trio._core._run.NurseryManager.__aexit__)
-    # pdbp.hideframe(trio._core._run.CancelScope.__exit__)
-    # pdbp.hideframe(_GeneratorContextManager.__exit__)
-    # pdbp.hideframe(_AsyncGeneratorContextManager.__aexit__)
-    # pdbp.hideframe(_AsyncGeneratorContextManager.__aenter__)
-    # pdbp.hideframe(trio.Event.wait)
-    return codes

tractor/devx/_stackscope.py

@@ -49,7 +49,7 @@ from tractor import (
     _state,
     log as logmod,
 )
-from tractor.devx import debug
+from tractor.devx import _debug
 
 log = logmod.get_logger(__name__)
 
@@ -82,7 +82,7 @@ def dump_task_tree() -> None:
     if (
         current_sigint_handler
         is not
-        debug.DebugStatus._trio_handler
+        _debug.DebugStatus._trio_handler
     ):
         sigint_handler_report: str = (
             'The default `trio` SIGINT handler was replaced?!'
@@ -237,9 +237,8 @@ def enable_stack_on_sig(
     try:
         import stackscope
     except ImportError:
-        log.error(
-            '`stackscope` not installed for use in debug mode!\n'
-            '`Ignoring {enable_stack_on_sig!r} call!\n'
+        log.warning(
+            '`stackscope` not installed for use in debug mode!'
         )
         return None
 
@@ -256,8 +255,8 @@ def enable_stack_on_sig(
         dump_tree_on_sig,
     )
     log.devx(
-        f'Enabling trace-trees on `SIGUSR1` '
-        f'since `stackscope` is installed @ \n'
+        'Enabling trace-trees on `SIGUSR1` '
+        'since `stackscope` is installed @ \n'
         f'{stackscope!r}\n\n'
         f'With `SIGUSR1` handler\n'
         f'|_{dump_tree_on_sig}\n'

tractor/devx/debug/__init__.py

@@ -1,100 +0,0 @@
-# tractor: structured concurrent "actors".
-# Copyright 2018-eternity Tyler Goodlet.
-
-# This program is free software: you can redistribute it and/or
-# modify it under the terms of the GNU Affero General Public License
-# as published by the Free Software Foundation, either version 3 of
-# the License, or (at your option) any later version.
-
-# This program is distributed in the hope that it will be useful, but
-# WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Affero General Public License for more details.
-
-# You should have received a copy of the GNU Affero General Public
-# License along with this program.  If not, see
-# <https://www.gnu.org/licenses/>.
-
-'''
-Multi-actor debugging for da peeps!
-
-'''
-from __future__ import annotations
-from tractor.log import get_logger
-from ._repl import (
-    PdbREPL as PdbREPL,
-    mk_pdb as mk_pdb,
-    TractorConfig as TractorConfig,
-)
-from ._tty_lock import (
-    DebugStatus as DebugStatus,
-    DebugStateError as DebugStateError,
-)
-from ._trace import (
-    Lock as Lock,
-    _pause_msg as _pause_msg,
-    _repl_fail_msg as _repl_fail_msg,
-    _set_trace as _set_trace,
-    _sync_pause_from_builtin as _sync_pause_from_builtin,
-    breakpoint as breakpoint,
-    maybe_init_greenback as maybe_init_greenback,
-    maybe_import_greenback as maybe_import_greenback,
-    pause as pause,
-    pause_from_sync as pause_from_sync,
-)
-from ._post_mortem import (
-    BoxedMaybeException as BoxedMaybeException,
-    maybe_open_crash_handler as maybe_open_crash_handler,
-    open_crash_handler as open_crash_handler,
-    post_mortem as post_mortem,
-    _crash_msg as _crash_msg,
-    _maybe_enter_pm as _maybe_enter_pm,
-)
-from ._sync import (
-    maybe_wait_for_debugger as maybe_wait_for_debugger,
-    acquire_debug_lock as acquire_debug_lock,
-)
-from ._sigint import (
-    sigint_shield as sigint_shield,
-    _ctlc_ignore_header as _ctlc_ignore_header
-)
-
-log = get_logger(__name__)
-
-# ----------------
-# XXX PKG TODO XXX
-# ----------------
-# refine the internal impl and APIs!
-#
-# -[ ] rework `._pause()` and it's branch-cases for root vs.
-#     subactor:
-#  -[ ] `._pause_from_root()` + `_pause_from_subactor()`?
-#  -[ ]  do the de-factor based on bg-thread usage in
-#    `.pause_from_sync()` & `_pause_from_bg_root_thread()`.
-#  -[ ] drop `debug_func == None` case which is confusing af..
-#  -[ ]  factor out `_enter_repl_sync()` into a util func for calling
-#    the `_set_trace()` / `_post_mortem()` APIs?
-#
-# -[ ] figure out if we need `acquire_debug_lock()` and/or re-implement
-#    it as part of the `.pause_from_sync()` rework per above?
-#
-# -[ ] pair the `._pause_from_subactor()` impl with a "debug nursery"
-#   that's dynamically allocated inside the `._rpc` task thus
-#   avoiding the `._service_n.start()` usage for the IPC request?
-#  -[ ] see the TODO inside `._rpc._errors_relayed_via_ipc()`
-#
-# -[ ] impl a `open_debug_request()` which encaps all
-#   `request_root_stdio_lock()` task scheduling deats
-#   + `DebugStatus` state mgmt; which should prolly be re-branded as
-#   a `DebugRequest` type anyway AND with suppoort for bg-thread
-#   (from root actor) usage?
-#
-# -[ ] handle the `xonsh` case for bg-root-threads in the SIGINT
-#     handler!
-#   -[ ] do we need to do the same for subactors?
-#   -[ ] make the failing tests finally pass XD
-#
-# -[ ] simplify `maybe_wait_for_debugger()` to be a root-task only
-#     API?
-#   -[ ] currently it's implemented as that so might as well make it
-#     formal?

tractor/devx/debug/_post_mortem.py

@@ -1,412 +0,0 @@
-# tractor: structured concurrent "actors".
-# Copyright 2018-eternity Tyler Goodlet.
-
-# This program is free software: you can redistribute it and/or
-# modify it under the terms of the GNU Affero General Public License
-# as published by the Free Software Foundation, either version 3 of
-# the License, or (at your option) any later version.
-
-# This program is distributed in the hope that it will be useful, but
-# WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Affero General Public License for more details.
-
-# You should have received a copy of the GNU Affero General Public
-# License along with this program.  If not, see
-# <https://www.gnu.org/licenses/>.
-
-'''
-Post-mortem debugging APIs and surrounding machinery for both
-sync and async contexts.
-
-Generally we maintain the same semantics a `pdb.post.mortem()` but
-with actor-tree-wide sync/cooperation around any (sub)actor's use of
-the root's TTY.
-
-'''
-from __future__ import annotations
-import bdb
-from contextlib import (
-    AbstractContextManager,
-    contextmanager as cm,
-    nullcontext,
-)
-from functools import (
-    partial,
-)
-import inspect
-import sys
-import traceback
-from typing import (
-    Callable,
-    Sequence,
-    Type,
-    TYPE_CHECKING,
-)
-from types import (
-    TracebackType,
-    FrameType,
-)
-
-from msgspec import Struct
-import trio
-from tractor._exceptions import (
-    NoRuntime,
-)
-from tractor import _state
-from tractor._state import (
-    current_actor,
-    debug_mode,
-)
-from tractor.log import get_logger
-from tractor._exceptions import (
-    is_multi_cancelled,
-)
-from ._trace import (
-    _pause,
-)
-from ._tty_lock import (
-    DebugStatus,
-)
-from ._repl import (
-    PdbREPL,
-    mk_pdb,
-    TractorConfig as TractorConfig,
-)
-
-if TYPE_CHECKING:
-    from trio.lowlevel import Task
-    from tractor._runtime import (
-        Actor,
-    )
-
-_crash_msg: str = (
-    'Opening a pdb REPL in crashed actor'
-)
-
-log = get_logger(__package__)
-
-
-class BoxedMaybeException(Struct):
-    '''
-    Box a maybe-exception for post-crash introspection usage
-    from the body of a `open_crash_handler()` scope.
-
-    '''
-    value: BaseException|None = None
-
-    # handler can suppress crashes dynamically
-    raise_on_exit: bool|Sequence[Type[BaseException]] = True
-
-    def pformat(self) -> str:
-        '''
-        Repr the boxed `.value` error in more-than-string
-        repr form.
-
-        '''
-        if not self.value:
-            return f'<{type(self).__name__}( .value=None )>'
-
-        return (
-            f'<{type(self.value).__name__}(\n'
-            f' |_.value = {self.value}\n'
-            f')>\n'
-        )
-
-    __repr__ = pformat
-
-
-def _post_mortem(
-    repl: PdbREPL,  # normally passed by `_pause()`
-
-    # XXX all `partial`-ed in by `post_mortem()` below!
-    tb: TracebackType,
-    api_frame: FrameType,
-
-    shield: bool = False,
-    hide_tb: bool = True,
-
-    # maybe pre/post REPL entry
-    repl_fixture: (
-        AbstractContextManager[bool]
-        |None
-    ) = None,
-
-    boxed_maybe_exc: BoxedMaybeException|None = None,
-
-) -> None:
-    '''
-    Enter the ``pdbpp`` port mortem entrypoint using our custom
-    debugger instance.
-
-    '''
-    __tracebackhide__: bool = hide_tb
-
-    # maybe enter any user fixture
-    enter_repl: bool = DebugStatus.maybe_enter_repl_fixture(
-        repl=repl,
-        repl_fixture=repl_fixture,
-        boxed_maybe_exc=boxed_maybe_exc,
-    )
-    try:
-        if not enter_repl:
-            # XXX, trigger `.release()` below immediately!
-            return
-        try:
-            actor: Actor = current_actor()
-            actor_repr: str = str(actor.uid)
-            # ^TODO, instead a nice runtime-info + maddr + uid?
-            # -[ ] impl a `Actor.__repr()__`??
-            #  |_ <task>:<thread> @ <actor>
-
-        except NoRuntime:
-            actor_repr: str = '<no-actor-runtime?>'
-
-        try:
-            task_repr: Task = trio.lowlevel.current_task()
-        except RuntimeError:
-            task_repr: str = '<unknown-Task>'
-
-        # TODO: print the actor supervion tree up to the root
-        # here! Bo
-        log.pdb(
-            f'{_crash_msg}\n'
-            f'x>(\n'
-            f' |_ {task_repr} @ {actor_repr}\n'
-
-        )
-
-        # XXX NOTE(s) on `pdbp.xpm()` version..
-        #
-        # - seems to lose the up-stack tb-info?
-        # - currently we're (only) replacing this from `pdbp.xpm()`
-        #   to add the `end=''` to the print XD
-        #
-        print(traceback.format_exc(), end='')
-        caller_frame: FrameType = api_frame.f_back
-
-        # NOTE, see the impl details of these in the lib to
-        # understand usage:
-        # - `pdbp.post_mortem()`
-        # - `pdbp.xps()`
-        # - `bdb.interaction()`
-        repl.reset()
-        repl.interaction(
-            frame=caller_frame,
-            # frame=None,
-            traceback=tb,
-        )
-    finally:
-        # XXX NOTE XXX: this is abs required to avoid hangs!
-        #
-        # Since we presume the post-mortem was enaged to
-        # a task-ending error, we MUST release the local REPL request
-        # so that not other local task nor the root remains blocked!
-        DebugStatus.release()
-
-
-async def post_mortem(
-    *,
-    tb: TracebackType|None = None,
-    api_frame: FrameType|None = None,
-    hide_tb: bool = False,
-
-    # TODO: support shield here just like in `pause()`?
-    # shield: bool = False,
-
-    **_pause_kwargs,
-
-) -> None:
-    '''
-    Our builtin async equivalient of `pdb.post_mortem()` which can be
-    used inside exception handlers.
-
-    It's also used for the crash handler when `debug_mode == True` ;)
-
-    '''
-    __tracebackhide__: bool = hide_tb
-
-    tb: TracebackType = tb or sys.exc_info()[2]
-
-    # TODO: do upward stack scan for highest @api_frame and
-    # use its parent frame as the expected user-app code
-    # interact point.
-    api_frame: FrameType = api_frame or inspect.currentframe()
-
-    # TODO, move to submod `._pausing` or ._api? _trace
-    await _pause(
-        debug_func=partial(
-            _post_mortem,
-            api_frame=api_frame,
-            tb=tb,
-        ),
-        hide_tb=hide_tb,
-        **_pause_kwargs
-    )
-
-
-async def _maybe_enter_pm(
-    err: BaseException,
-    *,
-    tb: TracebackType|None = None,
-    api_frame: FrameType|None = None,
-    hide_tb: bool = False,
-
-    # only enter debugger REPL when returns `True`
-    debug_filter: Callable[
-        [BaseException|BaseExceptionGroup],
-        bool,
-    ] = lambda err: not is_multi_cancelled(err),
-    **_pause_kws,
-):
-    if (
-        debug_mode()
-
-        # NOTE: don't enter debug mode recursively after quitting pdb
-        # Iow, don't re-enter the repl if the `quit` command was issued
-        # by the user.
-        and not isinstance(err, bdb.BdbQuit)
-
-        # XXX: if the error is the likely result of runtime-wide
-        # cancellation, we don't want to enter the debugger since
-        # there's races between when the parent actor has killed all
-        # comms and when the child tries to contact said parent to
-        # acquire the tty lock.
-
-        # Really we just want to mostly avoid catching KBIs here so there
-        # might be a simpler check we can do?
-        and
-        debug_filter(err)
-    ):
-        api_frame: FrameType = api_frame or inspect.currentframe()
-        tb: TracebackType = tb or sys.exc_info()[2]
-        await post_mortem(
-            api_frame=api_frame,
-            tb=tb,
-            **_pause_kws,
-        )
-        return True
-
-    else:
-        return False
-
-
-# TODO: better naming and what additionals?
-# - [ ] optional runtime plugging?
-# - [ ] detection for sync vs. async code?
-# - [ ] specialized REPL entry when in distributed mode?
-# -[x] hide tb by def
-# - [x] allow ignoring kbi Bo
-@cm
-def open_crash_handler(
-    catch: set[BaseException] = {
-        BaseException,
-    },
-    ignore: set[BaseException] = {
-        KeyboardInterrupt,
-        trio.Cancelled,
-    },
-    hide_tb: bool = True,
-
-    repl_fixture: (
-        AbstractContextManager[bool]  # pre/post REPL entry
-        |None
-    ) = None,
-    raise_on_exit: bool|Sequence[Type[BaseException]] = True,
-):
-    '''
-    Generic "post mortem" crash handler using `pdbp` REPL debugger.
-
-    We expose this as a CLI framework addon to both `click` and
-    `typer` users so they can quickly wrap cmd endpoints which get
-    automatically wrapped to use the runtime's `debug_mode: bool`
-    AND `pdbp.pm()` around any code that is PRE-runtime entry
-    - any sync code which runs BEFORE the main call to
-      `trio.run()`.
-
-    '''
-    __tracebackhide__: bool = hide_tb
-
-    # TODO, yield a `outcome.Error`-like boxed type?
-    # -[~] use `outcome.Value/Error` X-> frozen!
-    # -[x] write our own..?
-    # -[ ] consider just wtv is used by `pytest.raises()`?
-    #
-    boxed_maybe_exc = BoxedMaybeException(
-        raise_on_exit=raise_on_exit,
-    )
-    err: BaseException
-    try:
-        yield boxed_maybe_exc
-    except tuple(catch) as err:
-        boxed_maybe_exc.value = err
-        if (
-            type(err) not in ignore
-            and
-            not is_multi_cancelled(
-                err,
-                ignore_nested=ignore
-            )
-        ):
-            try:
-                # use our re-impl-ed version of `pdbp.xpm()`
-                _post_mortem(
-                    repl=mk_pdb(),
-                    tb=sys.exc_info()[2],
-                    api_frame=inspect.currentframe().f_back,
-                    hide_tb=hide_tb,
-
-                    repl_fixture=repl_fixture,
-                    boxed_maybe_exc=boxed_maybe_exc,
-                )
-            except bdb.BdbQuit:
-                __tracebackhide__: bool = False
-                raise err
-
-        if (
-            raise_on_exit is True
-            or (
-                raise_on_exit is not False
-                and (
-                    set(raise_on_exit)
-                    and
-                    type(err) in raise_on_exit
-                )
-            )
-            and
-            boxed_maybe_exc.raise_on_exit == raise_on_exit
-        ):
-            raise err
-
-
-@cm
-def maybe_open_crash_handler(
-    pdb: bool|None = None,
-    hide_tb: bool = True,
-
-    **kwargs,
-):
-    '''
-    Same as `open_crash_handler()` but with bool input flag
-    to allow conditional handling.
-
-    Normally this is used with CLI endpoints such that if the --pdb
-    flag is passed the pdb REPL is engaed on any crashes B)
-
-    '''
-    __tracebackhide__: bool = hide_tb
-
-    if pdb is None:
-        pdb: bool = _state.is_debug_mode()
-
-    rtctx = nullcontext(
-        enter_result=BoxedMaybeException()
-    )
-    if pdb:
-        rtctx = open_crash_handler(
-            hide_tb=hide_tb,
-            **kwargs,
-        )
-
-    with rtctx as boxed_maybe_exc:
-        yield boxed_maybe_exc

tractor/devx/debug/_repl.py

@@ -1,207 +0,0 @@
-# tractor: structured concurrent "actors".
-# Copyright 2018-eternity Tyler Goodlet.
-
-# This program is free software: you can redistribute it and/or
-# modify it under the terms of the GNU Affero General Public License
-# as published by the Free Software Foundation, either version 3 of
-# the License, or (at your option) any later version.
-
-# This program is distributed in the hope that it will be useful, but
-# WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Affero General Public License for more details.
-
-# You should have received a copy of the GNU Affero General Public
-# License along with this program.  If not, see
-# <https://www.gnu.org/licenses/>.
-
-'''
-`pdpp.Pdb` extentions/customization and other delegate usage.
-
-'''
-from functools import (
-    cached_property,
-)
-import os
-
-import pdbp
-from tractor._state import (
-    is_root_process,
-)
-
-from ._tty_lock import (
-    Lock,
-    DebugStatus,
-)
-
-
-class TractorConfig(pdbp.DefaultConfig):
-    '''
-    Custom `pdbp` config which tries to use the best tradeoff
-    between pretty and minimal.
-
-    '''
-    use_pygments: bool = True
-    sticky_by_default: bool = False
-    enable_hidden_frames: bool = True
-
-    # much thanks @mdmintz for the hot tip!
-    # fixes line spacing issue when resizing terminal B)
-    truncate_long_lines: bool = False
-
-    # ------ - ------
-    # our own custom config vars mostly
-    # for syncing with the actor tree's singleton
-    # TTY `Lock`.
-
-
-class PdbREPL(pdbp.Pdb):
-    '''
-    Add teardown hooks and local state describing any
-    ongoing TTY `Lock` request dialog.
-
-    '''
-    # override the pdbp config with our coolio one
-    # NOTE: this is only loaded when no `~/.pdbrc` exists
-    # so we should prolly pass it into the .__init__() instead?
-    # i dunno, see the `DefaultFactory` and `pdb.Pdb` impls.
-    DefaultConfig = TractorConfig
-
-    status = DebugStatus
-
-    # NOTE: see details in stdlib's `bdb.py`
-    # def user_exception(self, frame, exc_info):
-    #     '''
-    #     Called when we stop on an exception.
-    #     '''
-    #     log.warning(
-    #         'Exception during REPL sesh\n\n'
-    #         f'{frame}\n\n'
-    #         f'{exc_info}\n\n'
-    #     )
-
-    # NOTE: this actually hooks but i don't see anyway to detect
-    # if an error was caught.. this is why currently we just always
-    # call `DebugStatus.release` inside `_post_mortem()`.
-    # def preloop(self):
-    #     print('IN PRELOOP')
-    #     super().preloop()
-
-    # TODO: cleaner re-wrapping of all this?
-    # -[ ] figure out how to disallow recursive .set_trace() entry
-    #     since that'll cause deadlock for us.
-    # -[ ] maybe a `@cm` to call `super().<same_meth_name>()`?
-    # -[ ] look at hooking into the `pp` hook specially with our
-    #     own set of pretty-printers?
-    #    * `.pretty_struct.Struct.pformat()`
-    #    * `.pformat(MsgType.pld)`
-    #    * `.pformat(Error.tb_str)`?
-    #    * .. maybe more?
-    #
-    def set_continue(self):
-        try:
-            super().set_continue()
-        finally:
-            # NOTE: for subactors the stdio lock is released via the
-            # allocated RPC locker task, so for root we have to do it
-            # manually.
-            if (
-                is_root_process()
-                and
-                Lock._debug_lock.locked()
-                and
-                DebugStatus.is_main_trio_thread()
-            ):
-                # Lock.release(raise_on_thread=False)
-                Lock.release()
-
-            # XXX AFTER `Lock.release()` for root local repl usage
-            DebugStatus.release()
-
-    def set_quit(self):
-        try:
-            super().set_quit()
-        finally:
-            if (
-                is_root_process()
-                and
-                Lock._debug_lock.locked()
-                and
-                DebugStatus.is_main_trio_thread()
-            ):
-                # Lock.release(raise_on_thread=False)
-                Lock.release()
-
-            # XXX after `Lock.release()` for root local repl usage
-            DebugStatus.release()
-
-    # XXX NOTE: we only override this because apparently the stdlib pdb
-    # bois likes to touch the SIGINT handler as much as i like to touch
-    # my d$%&.
-    def _cmdloop(self):
-        self.cmdloop()
-
-    @cached_property
-    def shname(self) -> str | None:
-        '''
-        Attempt to return the login shell name with a special check for
-        the infamous `xonsh` since it seems to have some issues much
-        different from std shells when it comes to flushing the prompt?
-
-        '''
-        # SUPER HACKY and only really works if `xonsh` is not used
-        # before spawning further sub-shells..
-        shpath = os.getenv('SHELL', None)
-
-        if shpath:
-            if (
-                os.getenv('XONSH_LOGIN', default=False)
-                or 'xonsh' in shpath
-            ):
-                return 'xonsh'
-
-            return os.path.basename(shpath)
-
-        return None
-
-
-def mk_pdb() -> PdbREPL:
-    '''
-    Deliver a new `PdbREPL`: a multi-process safe `pdbp.Pdb`-variant
-    using the magic of `tractor`'s SC-safe IPC.
-
-    B)
-
-    Our `pdb.Pdb` subtype accomplishes multi-process safe debugging
-    by:
-
-    - mutexing access to the root process' std-streams (& thus parent
-      process TTY) via an IPC managed `Lock` singleton per
-      actor-process tree.
-
-    - temporarily overriding any subactor's SIGINT handler to shield
-      during live REPL sessions in sub-actors such that cancellation
-      is never (mistakenly) triggered by a ctrl-c and instead only by
-      explicit runtime API requests or after the
-      `pdb.Pdb.interaction()` call has returned.
-
-    FURTHER, the `pdbp.Pdb` instance is configured to be `trio`
-    "compatible" from a SIGINT handling perspective; we mask out
-    the default `pdb` handler and instead apply `trio`s default
-    which mostly addresses all issues described in:
-
-     - https://github.com/python-trio/trio/issues/1155
-
-    The instance returned from this factory should always be
-    preferred over the default `pdb[p].set_trace()` whenever using
-    a `pdb` REPL inside a `trio` based runtime.
-
-    '''
-    pdb = PdbREPL()
-
-    # XXX: These are the important flags mentioned in
-    # https://github.com/python-trio/trio/issues/1155
-    # which resolve the traceback spews to console.
-    pdb.allow_kbdint = True
-    pdb.nosigint = True
-    return pdb

tractor/devx/debug/_sigint.py

@@ -1,333 +0,0 @@
-# tractor: structured concurrent "actors".
-# Copyright 2018-eternity Tyler Goodlet.
-
-# This program is free software: you can redistribute it and/or
-# modify it under the terms of the GNU Affero General Public License
-# as published by the Free Software Foundation, either version 3 of
-# the License, or (at your option) any later version.
-
-# This program is distributed in the hope that it will be useful, but
-# WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Affero General Public License for more details.
-
-# You should have received a copy of the GNU Affero General Public
-# License along with this program.  If not, see
-# <https://www.gnu.org/licenses/>.
-
-'''
-A custom SIGINT handler which mainly shields actor (task)
-cancellation during REPL interaction.
-
-'''
-from __future__ import annotations
-from typing import (
-    TYPE_CHECKING,
-)
-import trio
-from tractor.log import get_logger
-from tractor._state import (
-    current_actor,
-    is_root_process,
-)
-from ._repl import (
-    PdbREPL,
-)
-from ._tty_lock import (
-    any_connected_locker_child,
-    DebugStatus,
-    Lock,
-)
-
-if TYPE_CHECKING:
-    from tractor.ipc import (
-        Channel,
-    )
-    from tractor._runtime import (
-        Actor,
-    )
-
-log = get_logger(__name__)
-
-_ctlc_ignore_header: str = (
-    'Ignoring SIGINT while debug REPL in use'
-)
-
-
-def sigint_shield(
-    signum: int,
-    frame: 'frame',  # type: ignore # noqa
-    *args,
-
-) -> None:
-    '''
-    Specialized, debugger-aware SIGINT handler.
-
-    In childred we always ignore/shield for SIGINT to avoid
-    deadlocks since cancellation should always be managed by the
-    supervising parent actor. The root actor-proces is always
-    cancelled on ctrl-c.
-
-    '''
-    __tracebackhide__: bool = True
-    actor: Actor = current_actor()
-
-    def do_cancel():
-        # If we haven't tried to cancel the runtime then do that instead
-        # of raising a KBI (which may non-gracefully destroy
-        # a ``trio.run()``).
-        if not actor._cancel_called:
-            actor.cancel_soon()
-
-        # If the runtime is already cancelled it likely means the user
-        # hit ctrl-c again because teardown didn't fully take place in
-        # which case we do the "hard" raising of a local KBI.
-        else:
-            raise KeyboardInterrupt
-
-    # only set in the actor actually running the REPL
-    repl: PdbREPL|None = DebugStatus.repl
-
-    # TODO: maybe we should flatten out all these cases using
-    # a match/case?
-    #
-    # root actor branch that reports whether or not a child
-    # has locked debugger.
-    if is_root_process():
-        # log.warning(
-        log.devx(
-            'Handling SIGINT in root actor\n'
-            f'{Lock.repr()}'
-            f'{DebugStatus.repr()}\n'
-        )
-        # try to see if the supposed (sub)actor in debug still
-        # has an active connection to *this* actor, and if not
-        # it's likely they aren't using the TTY lock / debugger
-        # and we should propagate SIGINT normally.
-        any_connected: bool = any_connected_locker_child()
-
-        problem = (
-            f'root {actor.uid} handling SIGINT\n'
-            f'any_connected: {any_connected}\n\n'
-
-            f'{Lock.repr()}\n'
-        )
-
-        if (
-            (ctx := Lock.ctx_in_debug)
-            and
-            (uid_in_debug := ctx.chan.uid) # "someone" is (ostensibly) using debug `Lock`
-        ):
-            name_in_debug: str = uid_in_debug[0]
-            assert not repl
-            # if not repl:  # but it's NOT us, the root actor.
-            # sanity: since no repl ref is set, we def shouldn't
-            # be the lock owner!
-            assert name_in_debug != 'root'
-
-            # IDEAL CASE: child has REPL as expected
-            if any_connected:  # there are subactors we can contact
-                # XXX: only if there is an existing connection to the
-                # (sub-)actor in debug do we ignore SIGINT in this
-                # parent! Otherwise we may hang waiting for an actor
-                # which has already terminated to unlock.
-                #
-                # NOTE: don't emit this with `.pdb()` level in
-                # root without a higher level.
-                log.runtime(
-                    _ctlc_ignore_header
-                    +
-                    f' by child '
-                    f'{uid_in_debug}\n'
-                )
-                problem = None
-
-            else:
-                problem += (
-                    '\n'
-                    f'A `pdb` REPL is SUPPOSEDLY in use by child {uid_in_debug}\n'
-                    f'BUT, no child actors are IPC contactable!?!?\n'
-                )
-
-        # IDEAL CASE: root has REPL as expected
-        else:
-            # root actor still has this SIGINT handler active without
-            # an actor using the `Lock` (a bug state) ??
-            # => so immediately cancel any stale lock cs and revert
-            # the handler!
-            if not DebugStatus.repl:
-                # TODO: WHEN should we revert back to ``trio``
-                # handler if this one is stale?
-                # -[ ] maybe after a counts work of ctl-c mashes?
-                # -[ ] use a state var like `stale_handler: bool`?
-                problem += (
-                    'No subactor is using a `pdb` REPL according `Lock.ctx_in_debug`?\n'
-                    'BUT, the root should be using it, WHY this handler ??\n\n'
-                    'So either..\n'
-                    '- some root-thread is using it but has no `.repl` set?, OR\n'
-                    '- something else weird is going on outside the runtime!?\n'
-                )
-            else:
-                # NOTE: since we emit this msg on ctl-c, we should
-                # also always re-print the prompt the tail block!
-                log.pdb(
-                    _ctlc_ignore_header
-                    +
-                    f' by root actor..\n'
-                    f'{DebugStatus.repl_task}\n'
-                    f' |_{repl}\n'
-                )
-                problem = None
-
-        # XXX if one is set it means we ARE NOT operating an ideal
-        # case where a child subactor or us (the root) has the
-        # lock without any other detected problems.
-        if problem:
-
-            # detect, report and maybe clear a stale lock request
-            # cancel scope.
-            lock_cs: trio.CancelScope = Lock.get_locking_task_cs()
-            maybe_stale_lock_cs: bool = (
-                lock_cs is not None
-                and not lock_cs.cancel_called
-            )
-            if maybe_stale_lock_cs:
-                problem += (
-                    '\n'
-                    'Stale `Lock.ctx_in_debug._scope: CancelScope` detected?\n'
-                    f'{Lock.ctx_in_debug}\n\n'
-
-                    '-> Calling ctx._scope.cancel()!\n'
-                )
-                lock_cs.cancel()
-
-            # TODO: wen do we actually want/need this, see above.
-            # DebugStatus.unshield_sigint()
-            log.warning(problem)
-
-    # child actor that has locked the debugger
-    elif not is_root_process():
-        log.debug(
-            f'Subactor {actor.uid} handling SIGINT\n\n'
-            f'{Lock.repr()}\n'
-        )
-
-        rent_chan: Channel = actor._parent_chan
-        if (
-            rent_chan is None
-            or
-            not rent_chan.connected()
-        ):
-            log.warning(
-                'This sub-actor thinks it is debugging '
-                'but it has no connection to its parent ??\n'
-                f'{actor.uid}\n'
-                'Allowing SIGINT propagation..'
-            )
-            DebugStatus.unshield_sigint()
-
-        repl_task: str|None = DebugStatus.repl_task
-        req_task: str|None = DebugStatus.req_task
-        if (
-            repl_task
-            and
-            repl
-        ):
-            log.pdb(
-                _ctlc_ignore_header
-                +
-                f' by local task\n\n'
-                f'{repl_task}\n'
-                f' |_{repl}\n'
-            )
-        elif req_task:
-            log.debug(
-                _ctlc_ignore_header
-                +
-                f' by local request-task and either,\n'
-                f'- someone else is already REPL-in and has the `Lock`, or\n'
-                f'- some other local task already is replin?\n\n'
-                f'{req_task}\n'
-            )
-
-        # TODO can we remove this now?
-        # -[ ] does this path ever get hit any more?
-        else:
-            msg: str = (
-                'SIGINT shield handler still active BUT, \n\n'
-            )
-            if repl_task is None:
-                msg += (
-                    '- No local task claims to be in debug?\n'
-                )
-
-            if repl is None:
-                msg += (
-                    '- No local REPL is currently active?\n'
-                )
-
-            if req_task is None:
-                msg += (
-                    '- No debug request task is active?\n'
-                )
-
-            log.warning(
-                msg
-                +
-                'Reverting handler to `trio` default!\n'
-            )
-            DebugStatus.unshield_sigint()
-
-            # XXX ensure that the reverted-to-handler actually is
-            # able to rx what should have been **this** KBI ;)
-            do_cancel()
-
-        # TODO: how to handle the case of an intermediary-child actor
-        # that **is not** marked in debug mode? See oustanding issue:
-        # https://github.com/goodboy/tractor/issues/320
-        # elif debug_mode():
-
-    # maybe redraw/print last REPL output to console since
-    # we want to alert the user that more input is expect since
-    # nothing has been done dur to ignoring sigint.
-    if (
-        DebugStatus.repl  # only when current actor has a REPL engaged
-    ):
-        flush_status: str = (
-            'Flushing stdout to ensure new prompt line!\n'
-        )
-
-        # XXX: yah, mega hack, but how else do we catch this madness XD
-        if (
-            repl.shname == 'xonsh'
-        ):
-            flush_status += (
-                '-> ALSO re-flushing due to `xonsh`..\n'
-            )
-            repl.stdout.write(repl.prompt)
-
-        # log.warning(
-        log.devx(
-            flush_status
-        )
-        repl.stdout.flush()
-
-        # TODO: better console UX to match the current "mode":
-        # -[ ] for example if in sticky mode where if there is output
-        #   detected as written to the tty we redraw this part underneath
-        #   and erase the past draw of this same bit above?
-        # repl.sticky = True
-        # repl._print_if_sticky()
-
-        # also see these links for an approach from `ptk`:
-        # https://github.com/goodboy/tractor/issues/130#issuecomment-663752040
-        # https://github.com/prompt-toolkit/python-prompt-toolkit/blob/c2c6af8a0308f9e5d7c0e28cb8a02963fe0ce07a/prompt_toolkit/patch_stdout.py
-    else:
-        log.devx(
-        # log.warning(
-            'Not flushing stdout since not needed?\n'
-            f'|_{repl}\n'
-        )
-
-    # XXX only for tracing this handler
-    log.devx('exiting SIGINT')

tractor/devx/debug/_sync.py

@@ -1,220 +0,0 @@
-# tractor: structured concurrent "actors".
-# Copyright 2018-eternity Tyler Goodlet.
-
-# This program is free software: you can redistribute it and/or
-# modify it under the terms of the GNU Affero General Public License
-# as published by the Free Software Foundation, either version 3 of
-# the License, or (at your option) any later version.
-
-# This program is distributed in the hope that it will be useful, but
-# WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Affero General Public License for more details.
-
-# You should have received a copy of the GNU Affero General Public
-# License along with this program.  If not, see
-# <https://www.gnu.org/licenses/>.
-
-'''
-Debugger synchronization APIs to ensure orderly access and
-non-TTY-clobbering graceful teardown.
-
-
-'''
-from __future__ import annotations
-from contextlib import (
-    asynccontextmanager as acm,
-)
-from functools import (
-    partial,
-)
-from typing import (
-    AsyncGenerator,
-    Callable,
-)
-
-from tractor.log import get_logger
-import trio
-from trio.lowlevel import (
-    current_task,
-    Task,
-)
-from tractor._context import Context
-from tractor._state import (
-    current_actor,
-    debug_mode,
-    is_root_process,
-)
-from ._repl import (
-    TractorConfig as TractorConfig,
-)
-from ._tty_lock import (
-    Lock,
-    request_root_stdio_lock,
-    any_connected_locker_child,
-)
-from ._sigint import (
-    sigint_shield as sigint_shield,
-    _ctlc_ignore_header as _ctlc_ignore_header
-)
-
-log = get_logger(__package__)
-
-
-async def maybe_wait_for_debugger(
-    poll_steps: int = 2,
-    poll_delay: float = 0.1,
-    child_in_debug: bool = False,
-
-    header_msg: str = '',
-    _ll: str = 'devx',
-
-) -> bool:  # was locked and we polled?
-
-    if (
-        not debug_mode()
-        and
-        not child_in_debug
-    ):
-        return False
-
-    logmeth: Callable = getattr(log, _ll)
-
-    msg: str = header_msg
-    if (
-        is_root_process()
-    ):
-        # If we error in the root but the debugger is
-        # engaged we don't want to prematurely kill (and
-        # thus clobber access to) the local tty since it
-        # will make the pdb repl unusable.
-        # Instead try to wait for pdb to be released before
-        # tearing down.
-        ctx_in_debug: Context|None = Lock.ctx_in_debug
-        in_debug: tuple[str, str]|None = (
-            ctx_in_debug.chan.uid
-            if ctx_in_debug
-            else None
-        )
-        if in_debug == current_actor().uid:
-            log.debug(
-                msg
-                +
-                'Root already owns the TTY LOCK'
-            )
-            return True
-
-        elif in_debug:
-            msg += (
-                f'Debug `Lock` in use by subactor\n|\n|_{in_debug}\n'
-            )
-            # TODO: could this make things more deterministic?
-            # wait to see if a sub-actor task will be
-            # scheduled and grab the tty lock on the next
-            # tick?
-            # XXX => but it doesn't seem to work..
-            # await trio.testing.wait_all_tasks_blocked(cushion=0)
-        else:
-            logmeth(
-                msg
-                +
-                'Root immediately acquired debug TTY LOCK'
-            )
-            return False
-
-        for istep in range(poll_steps):
-            if (
-                Lock.req_handler_finished is not None
-                and not Lock.req_handler_finished.is_set()
-                and in_debug is not None
-            ):
-                # caller_frame_info: str = pformat_caller_frame()
-                logmeth(
-                    msg
-                    +
-                    '\n^^ Root is waiting on tty lock release.. ^^\n'
-                    # f'{caller_frame_info}\n'
-                )
-
-                if not any_connected_locker_child():
-                    Lock.get_locking_task_cs().cancel()
-
-                with trio.CancelScope(shield=True):
-                    await Lock.req_handler_finished.wait()
-
-                log.devx(
-                    f'Subactor released debug lock\n'
-                    f'|_{in_debug}\n'
-                )
-                break
-
-            # is no subactor locking debugger currently?
-            if (
-                in_debug is None
-                and (
-                    Lock.req_handler_finished is None
-                    or Lock.req_handler_finished.is_set()
-                )
-            ):
-                logmeth(
-                    msg
-                    +
-                    'Root acquired tty lock!'
-                )
-                break
-
-            else:
-                logmeth(
-                    'Root polling for debug:\n'
-                    f'poll step: {istep}\n'
-                    f'poll delya: {poll_delay}\n\n'
-                    f'{Lock.repr()}\n'
-                )
-                with trio.CancelScope(shield=True):
-                    await trio.sleep(poll_delay)
-                    continue
-
-        return True
-
-    # else:
-    #     # TODO: non-root call for #320?
-    #     this_uid: tuple[str, str] = current_actor().uid
-    #     async with acquire_debug_lock(
-    #         subactor_uid=this_uid,
-    #     ):
-    #         pass
-    return False
-
-
-@acm
-async def acquire_debug_lock(
-    subactor_uid: tuple[str, str],
-) -> AsyncGenerator[
-    trio.CancelScope|None,
-    tuple,
-]:
-    '''
-    Request to acquire the TTY `Lock` in the root actor, release on
-    exit.
-
-    This helper is for actor's who don't actually need to acquired
-    the debugger but want to wait until the lock is free in the
-    process-tree root such that they don't clobber an ongoing pdb
-    REPL session in some peer or child!
-
-    '''
-    if not debug_mode():
-        yield None
-        return
-
-    task: Task = current_task()
-    async with trio.open_nursery() as n:
-        ctx: Context = await n.start(
-            partial(
-                request_root_stdio_lock,
-                actor_uid=subactor_uid,
-                task_uid=(task.name, id(task)),
-            )
-        )
-        yield ctx
-        ctx.cancel()

tractor/devx/pformat.py

@@ -15,10 +15,8 @@
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 '''
-Pretty formatters for use throughout our internals.
-
-Handy for logging and exception message content but also for `repr()`
-in REPL(s).
+Pretty formatters for use throughout the code base.
+Mostly handy for logging and exception message content.
 
 '''
 import sys
@@ -226,8 +224,8 @@ def pformat_cs(
     field_prefix: str = ' |_',
 ) -> str:
     '''
-    Pretty format info about a `trio.CancelScope` including most of
-    its public state and `._cancel_status`.
+    Pretty format info about a `trio.CancelScope` including most
+    of its public state and `._cancel_status`.
 
     The output can be modified to show a "var name" for the
     instance as a field prefix, just a simple str before each
@@ -249,279 +247,3 @@ def pformat_cs(
         +
         fields
     )
-
-
-def nest_from_op(
-    input_op: str,  # TODO, Literal of all op-"symbols" from below?
-    text: str,
-    prefix_op: bool = True,  # unset is to suffix the first line
-    # optionally suffix `text`, by def on a newline
-    op_suffix='\n',
-
-    nest_prefix: str = '|_',
-    nest_indent: int|None = None,
-    # XXX indent `next_prefix` "to-the-right-of" `input_op`
-    # by this count of whitespaces (' ').
-    rm_from_first_ln: str|None = None,
-
-) -> str:
-    '''
-    Depth-increment the input (presumably hierarchy/supervision)
-    input "tree string" below the provided `input_op` execution
-    operator, so injecting a `"\n|_{input_op}\n"`and indenting the
-    `tree_str` to nest content aligned with the ops last char.
-
-    '''
-    # `sclang` "structurred-concurrency-language": an ascii-encoded
-    # symbolic alphabet to describe concurrent systems.
-    #
-    # ?TODO? aa more fomal idea for a syntax to the state of
-    # concurrent systems as a "3-domain" (execution, scope, storage)
-    # model and using a minimal ascii/utf-8 operator-set.
-    #
-    # try not to take any of this seriously yet XD
-    #
-    # > is a "play operator" indicating (CPU bound)
-    #   exec/work/ops required at the "lowest level computing"
-    #
-    # execution primititves (tasks, threads, actors..) denote their
-    # lifetime with '(' and ')' since parentheses normally are used
-    # in many langs to denote function calls.
-    #
-    # starting = (
-    # >(  opening/starting; beginning of the thread-of-exec (toe?)
-    # (>  opened/started,  (finished spawning toe)
-    # |_<Task: blah blah..>  repr of toe, in py these look like <objs>
-    #
-    # >) closing/exiting/stopping,
-    # )> closed/exited/stopped,
-    # |_<Task: blah blah..>
-    #   [OR <), )< ?? ]
-    #
-    # ending = )
-    # >c) cancelling to close/exit
-    # c)> cancelled (caused close), OR?
-    #  |_<Actor: ..>
-    #   OR maybe "<c)" which better indicates the cancel being
-    #   "delivered/returned" / returned" to LHS?
-    #
-    # >x)  erroring to eventuall exit
-    # x)>  errored and terminated
-    #  |_<Actor: ...>
-    #
-    # scopes: supers/nurseries, IPC-ctxs, sessions, perms, etc.
-    # >{  opening
-    # {>  opened
-    # }>  closed
-    # >}  closing
-    #
-    # storage: like queues, shm-buffers, files, etc..
-    # >[  opening
-    # [>  opened
-    #  |_<FileObj: ..>
-    #
-    # >]  closing
-    # ]>  closed
-
-    # IPC ops: channels, transports, msging
-    # =>  req msg
-    # <=  resp msg
-    # <=> 2-way streaming (of msgs)
-    # <-  recv 1 msg
-    # ->  send 1 msg
-    #
-    # TODO: still not sure on R/L-HS approach..?
-    # =>(  send-req to exec start (task, actor, thread..)
-    # (<=  recv-req to ^
-    #
-    # (<=  recv-req ^
-    # <=(  recv-resp opened remote exec primitive
-    # <=)  recv-resp closed
-    #
-    # )<=c req to stop due to cancel
-    # c=>) req to stop due to cancel
-    #
-    # =>{  recv-req to open
-    # <={  send-status that it closed
-    #
-    if (
-        nest_prefix
-        and
-        nest_indent != 0
-    ):
-        if nest_indent is not None:
-            nest_prefix: str = textwrap.indent(
-                nest_prefix,
-                prefix=nest_indent*' ',
-            )
-        nest_indent: int = len(nest_prefix)
-
-    # determine body-text indent either by,
-    # - using wtv explicit indent value is provided,
-    # OR
-    # - auto-calcing the indent to embed `text` under
-    #   the `nest_prefix` if provided, **IFF** `nest_indent=None`.
-    tree_str_indent: int = 0
-    if nest_indent not in {0, None}:
-        tree_str_indent = nest_indent
-    elif (
-        nest_prefix
-        and
-        nest_indent != 0
-    ):
-        tree_str_indent = len(nest_prefix)
-
-    indented_tree_str: str = text
-    if tree_str_indent:
-        indented_tree_str: str = textwrap.indent(
-            text,
-            prefix=' '*tree_str_indent,
-        )
-
-    # inject any provided nesting-prefix chars
-    # into the head of the first line.
-    if nest_prefix:
-        indented_tree_str: str = (
-            f'{nest_prefix}{indented_tree_str[tree_str_indent:]}'
-        )
-
-    if (
-        not prefix_op
-        or
-        rm_from_first_ln
-    ):
-        tree_lns: list[str] = indented_tree_str.splitlines()
-        first: str = tree_lns[0]
-        if rm_from_first_ln:
-            first = first.strip().replace(
-                rm_from_first_ln,
-                '',
-            )
-        indented_tree_str: str = '\n'.join(tree_lns[1:])
-
-        if prefix_op:
-            indented_tree_str = (
-                f'{first}\n'
-                f'{indented_tree_str}'
-            )
-
-    if prefix_op:
-        return (
-            f'{input_op}{op_suffix}'
-            f'{indented_tree_str}'
-        )
-    else:
-        return (
-            f'{first}{input_op}{op_suffix}'
-            f'{indented_tree_str}'
-        )
-
-
-# ------ modden.repr ------
-# XXX originally taken verbaatim from `modden.repr`
-'''
-More "multi-line" representation then the stdlib's `pprint` equivs.
-
-'''
-from inspect import (
-    FrameInfo,
-    stack,
-)
-import pprint
-import reprlib
-from typing import (
-    Callable,
-)
-
-
-def mk_repr(
-    **repr_kws,
-) -> Callable[[str], str]:
-    '''
-    Allocate and deliver a `repr.Repr` instance with provided input
-    settings using the std-lib's `reprlib` mod,
-     * https://docs.python.org/3/library/reprlib.html
-
-    ------ Ex. ------
-    An up to 6-layer-nested `dict` as multi-line:
-    - https://stackoverflow.com/a/79102479
-    - https://docs.python.org/3/library/reprlib.html#reprlib.Repr.maxlevel
-
-    '''
-    def_kws: dict[str, int] = dict(
-        indent=3,  # indent used for repr of recursive objects
-        maxlevel=616,  # recursion levels
-        maxdict=616,  # max items shown for `dict`
-        maxlist=616,  # max items shown for `dict`
-        maxstring=616,  # match editor line-len limit
-        maxtuple=616,  # match editor line-len limit
-        maxother=616,  # match editor line-len limit
-    )
-    def_kws |= repr_kws
-    reprr = reprlib.Repr(**def_kws)
-    return reprr.repr
-
-
-def ppfmt(
-    obj: object,
-    do_print: bool = False,
-) -> str:
-    '''
-    The `pprint.pformat()` version of `pprint.pp()`, namely
-    a default `sort_dicts=False`.. (which i think should be
-    the normal default in the stdlib).
-
-    '''
-    pprepr: Callable = mk_repr()
-    repr_str: str = pprepr(obj)
-
-    if do_print:
-        return pprint.pp(repr_str)
-
-    return repr_str
-
-
-pformat = ppfmt
-
-
-def pfmt_frame_info(fi: FrameInfo) -> str:
-    '''
-    Like a std `inspect.FrameInfo.__repr__()` but multi-line..
-
-    '''
-    return (
-        'FrameInfo(\n'
-        '  frame={!r},\n'
-        '  filename={!r},\n'
-        '  lineno={!r},\n'
-        '  function={!r},\n'
-        '  code_context={!r},\n'
-        '  index={!r},\n'
-        '  positions={!r})'
-        ).format(
-            fi.frame,
-            fi.filename,
-            fi.lineno,
-            fi.function,
-            fi.code_context,
-            fi.index,
-            fi.positions
-        )
-
-
-def pfmt_callstack(frames: int = 1) -> str:
-    '''
-    Generate a string of nested `inspect.FrameInfo` objects returned
-    from a `inspect.stack()` call such that only the `.frame` field
-    for each  layer is pprinted.
-
-    '''
-    caller_frames: list[FrameInfo] =  stack()[1:1+frames]
-    frames_str: str = ''
-    for i, frame_info in enumerate(caller_frames):
-        frames_str += textwrap.indent(
-            f'{frame_info.frame!r}\n',
-            prefix=' '*i,
-
-        )
-    return frames_str

tractor/ipc/__init__.py

@@ -13,7 +13,6 @@
 
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
 '''
 A modular IPC layer supporting the power of cross-process SC!
 

tractor/ipc/_ringbuf.py

@@ -1,253 +0,0 @@
-# tractor: structured concurrent "actors".
-# Copyright 2018-eternity Tyler Goodlet.
-
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Affero General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Affero General Public License for more details.
-
-# You should have received a copy of the GNU Affero General Public License
-# along with this program.  If not, see <https://www.gnu.org/licenses/>.
-'''
-IPC Reliable RingBuffer implementation
-
-'''
-from __future__ import annotations
-from contextlib import contextmanager as cm
-from multiprocessing.shared_memory import SharedMemory
-
-import trio
-from msgspec import (
-    Struct,
-    to_builtins
-)
-
-from ._linux import (
-    EFD_NONBLOCK,
-    open_eventfd,
-    EventFD
-)
-from ._mp_bs import disable_mantracker
-
-
-disable_mantracker()
-
-
-class RBToken(Struct, frozen=True):
-    '''
-    RingBuffer token contains necesary info to open the two
-    eventfds and the shared memory
-
-    '''
-    shm_name: str
-    write_eventfd: int
-    wrap_eventfd: int
-    buf_size: int
-
-    def as_msg(self):
-        return to_builtins(self)
-
-    @classmethod
-    def from_msg(cls, msg: dict) -> RBToken:
-        if isinstance(msg, RBToken):
-            return msg
-
-        return RBToken(**msg)
-
-
-@cm
-def open_ringbuf(
-    shm_name: str,
-    buf_size: int = 10 * 1024,
-    write_efd_flags: int = 0,
-    wrap_efd_flags: int = 0
-) -> RBToken:
-    shm = SharedMemory(
-        name=shm_name,
-        size=buf_size,
-        create=True
-    )
-    try:
-        token = RBToken(
-            shm_name=shm_name,
-            write_eventfd=open_eventfd(flags=write_efd_flags),
-            wrap_eventfd=open_eventfd(flags=wrap_efd_flags),
-            buf_size=buf_size
-        )
-        yield token
-
-    finally:
-        shm.unlink()
-
-
-class RingBuffSender(trio.abc.SendStream):
-    '''
-    IPC Reliable Ring Buffer sender side implementation
-
-    `eventfd(2)` is used for wrap around sync, and also to signal
-    writes to the reader.
-
-    '''
-    def __init__(
-        self,
-        token: RBToken,
-        start_ptr: int = 0,
-    ):
-        token = RBToken.from_msg(token)
-        self._shm = SharedMemory(
-            name=token.shm_name,
-            size=token.buf_size,
-            create=False
-        )
-        self._write_event = EventFD(token.write_eventfd, 'w')
-        self._wrap_event = EventFD(token.wrap_eventfd, 'r')
-        self._ptr = start_ptr
-
-    @property
-    def key(self) -> str:
-        return self._shm.name
-
-    @property
-    def size(self) -> int:
-        return self._shm.size
-
-    @property
-    def ptr(self) -> int:
-        return self._ptr
-
-    @property
-    def write_fd(self) -> int:
-        return self._write_event.fd
-
-    @property
-    def wrap_fd(self) -> int:
-        return self._wrap_event.fd
-
-    async def send_all(self, data: bytes | bytearray | memoryview):
-        # while data is larger than the remaining buf
-        target_ptr = self.ptr + len(data)
-        while target_ptr > self.size:
-            # write all bytes that fit
-            remaining = self.size - self.ptr
-            self._shm.buf[self.ptr:] = data[:remaining]
-            # signal write and wait for reader wrap around
-            self._write_event.write(remaining)
-            await self._wrap_event.read()
-
-            # wrap around and trim already written bytes
-            self._ptr = 0
-            data = data[remaining:]
-            target_ptr = self._ptr + len(data)
-
-        # remaining data fits on buffer
-        self._shm.buf[self.ptr:target_ptr] = data
-        self._write_event.write(len(data))
-        self._ptr = target_ptr
-
-    async def wait_send_all_might_not_block(self):
-        raise NotImplementedError
-
-    async def aclose(self):
-        self._write_event.close()
-        self._wrap_event.close()
-        self._shm.close()
-
-    async def __aenter__(self):
-        self._write_event.open()
-        self._wrap_event.open()
-        return self
-
-
-class RingBuffReceiver(trio.abc.ReceiveStream):
-    '''
-    IPC Reliable Ring Buffer receiver side implementation
-
-    `eventfd(2)` is used for wrap around sync, and also to signal
-    writes to the reader.
-
-    '''
-    def __init__(
-        self,
-        token: RBToken,
-        start_ptr: int = 0,
-        flags: int = 0
-    ):
-        token = RBToken.from_msg(token)
-        self._shm = SharedMemory(
-            name=token.shm_name,
-            size=token.buf_size,
-            create=False
-        )
-        self._write_event = EventFD(token.write_eventfd, 'w')
-        self._wrap_event = EventFD(token.wrap_eventfd, 'r')
-        self._ptr = start_ptr
-        self._flags = flags
-
-    @property
-    def key(self) -> str:
-        return self._shm.name
-
-    @property
-    def size(self) -> int:
-        return self._shm.size
-
-    @property
-    def ptr(self) -> int:
-        return self._ptr
-
-    @property
-    def write_fd(self) -> int:
-        return self._write_event.fd
-
-    @property
-    def wrap_fd(self) -> int:
-        return self._wrap_event.fd
-
-    async def receive_some(
-        self,
-        max_bytes: int | None = None,
-        nb_timeout: float = 0.1
-    ) -> memoryview:
-        # if non blocking eventfd enabled, do polling
-        # until next write, this allows signal handling
-        if self._flags | EFD_NONBLOCK:
-            delta = None
-            while delta is None:
-                try:
-                    delta = await self._write_event.read()
-
-                except OSError as e:
-                    if e.errno == 'EAGAIN':
-                        continue
-
-                    raise e
-
-        else:
-            delta = await self._write_event.read()
-
-        # fetch next segment and advance ptr
-        next_ptr = self._ptr + delta
-        segment = self._shm.buf[self._ptr:next_ptr]
-        self._ptr = next_ptr
-
-        if self.ptr == self.size:
-            # reached the end, signal wrap around
-            self._ptr = 0
-            self._wrap_event.write(1)
-
-        return segment
-
-    async def aclose(self):
-        self._write_event.close()
-        self._wrap_event.close()
-        self._shm.close()
-
-    async def __aenter__(self):
-        self._write_event.open()
-        self._wrap_event.open()
-        return self

tractor/ipc/_ringbuf/_pubsub.py

@@ -0,0 +1,834 @@
+# tractor: structured concurrent "actors".
+# Copyright 2018-eternity Tyler Goodlet.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+'''
+Ring buffer ipc publish-subscribe mechanism brokered by ringd
+can dynamically add new outputs (publisher) or inputs (subscriber)
+'''
+from typing import (
+    TypeVar,
+    Generic,
+    Callable,
+    Awaitable,
+    AsyncContextManager
+)
+from functools import partial
+from contextlib import asynccontextmanager as acm
+from dataclasses import dataclass
+
+import trio
+import tractor
+
+from msgspec.msgpack import (
+    Encoder,
+    Decoder
+)
+
+from tractor.ipc._ringbuf import (
+    RBToken,
+    PayloadT,
+    RingBufferSendChannel,
+    RingBufferReceiveChannel,
+    attach_to_ringbuf_sender,
+    attach_to_ringbuf_receiver
+)
+
+from tractor.trionics import (
+    order_send_channel,
+    order_receive_channel
+)
+
+import tractor.linux._fdshare as fdshare
+
+
+log = tractor.log.get_logger(__name__)
+
+
+ChannelType = TypeVar('ChannelType')
+
+
+@dataclass
+class ChannelInfo:
+    token: RBToken
+    channel: ChannelType
+    cancel_scope: trio.CancelScope
+    teardown: trio.Event
+
+
+class ChannelManager(Generic[ChannelType]):
+    '''
+    Helper for managing channel resources and their handler tasks with
+    cancellation, add or remove channels dynamically!
+
+    '''
+
+    def __init__(
+        self,
+        # nursery used to spawn channel handler tasks
+        n: trio.Nursery,
+
+        # acm will be used for setup & teardown of channel resources
+        open_channel_acm: Callable[..., AsyncContextManager[ChannelType]],
+
+        # long running bg task to handle channel
+        channel_task: Callable[..., Awaitable[None]]
+    ):
+        self._n = n
+        self._open_channel = open_channel_acm
+        self._channel_task = channel_task
+
+        # signal when a new channel conects and we previously had none
+        self._connect_event = trio.Event()
+
+        # store channel runtime variables
+        self._channels: list[ChannelInfo] = []
+
+        self._is_closed: bool = True
+
+    @property
+    def closed(self) -> bool:
+        return self._is_closed
+
+    @property
+    def channels(self) -> list[ChannelInfo]:
+        return self._channels
+
+    async def _channel_handler_task(
+        self,
+        token: RBToken,
+        task_status=trio.TASK_STATUS_IGNORED,
+        **kwargs
+    ):
+        '''
+        Open channel resources, add to internal data structures, signal channel
+        connect through trio.Event, and run `channel_task` with cancel scope,
+        and finally, maybe remove channel from internal data structures.
+
+        Spawned by `add_channel` function, lock is held from begining of fn
+        until `task_status.started()` call.
+
+        kwargs are proxied to `self._open_channel` acm.
+        '''
+        async with self._open_channel(
+            token,
+            **kwargs
+        ) as chan:
+            cancel_scope = trio.CancelScope()
+            info = ChannelInfo(
+                token=token,
+                channel=chan,
+                cancel_scope=cancel_scope,
+                teardown=trio.Event()
+            )
+            self._channels.append(info)
+
+            if len(self) == 1:
+                self._connect_event.set()
+
+            task_status.started()
+
+            with cancel_scope:
+                await self._channel_task(info)
+
+        self._maybe_destroy_channel(token.shm_name)
+
+    def _find_channel(self, name: str) -> tuple[int, ChannelInfo] | None:
+        '''
+        Given a channel name maybe return its index and value from
+        internal _channels list.
+
+        Only use after acquiring lock.
+        '''
+        for entry in enumerate(self._channels):
+            i, info = entry
+            if info.token.shm_name == name:
+                return entry
+
+        return None
+
+
+    def _maybe_destroy_channel(self, name: str):
+        '''
+        If channel exists cancel its scope and remove from internal
+        _channels list.
+
+        '''
+        maybe_entry = self._find_channel(name)
+        if maybe_entry:
+            i, info = maybe_entry
+            info.cancel_scope.cancel()
+            info.teardown.set()
+            del self._channels[i]
+
+    async def add_channel(
+        self,
+        token: RBToken,
+        **kwargs
+    ):
+        '''
+        Add a new channel to be handled
+
+        '''
+        if self.closed:
+            raise trio.ClosedResourceError
+
+        await self._n.start(partial(
+            self._channel_handler_task,
+            RBToken.from_msg(token),
+            **kwargs
+        ))
+
+    async def remove_channel(self, name: str):
+        '''
+        Remove a channel and stop its handling
+
+        '''
+        if self.closed:
+            raise trio.ClosedResourceError
+
+        maybe_entry = self._find_channel(name)
+        if not maybe_entry:
+            # return
+            raise RuntimeError(
+                f'tried to remove channel {name} but if does not exist'
+            )
+
+        i, info = maybe_entry
+        self._maybe_destroy_channel(name)
+
+        await info.teardown.wait()
+
+        # if that was last channel reset connect event
+        if len(self) == 0:
+            self._connect_event = trio.Event()
+
+    async def wait_for_channel(self):
+        '''
+        Wait until at least one channel added
+
+        '''
+        if self.closed:
+            raise trio.ClosedResourceError
+
+        await self._connect_event.wait()
+        self._connect_event = trio.Event()
+
+    def __len__(self) -> int:
+        return len(self._channels)
+
+    def __getitem__(self, name: str):
+        maybe_entry = self._find_channel(name)
+        if maybe_entry:
+            _, info = maybe_entry
+            return info
+
+        raise KeyError(f'Channel {name} not found!')
+
+    def open(self):
+        self._is_closed = False
+
+    async def close(self) -> None:
+        if self.closed:
+            log.warning('tried to close ChannelManager but its already closed...')
+            return
+
+        for info in self._channels:
+            if info.channel.closed:
+                continue
+
+            await info.channel.aclose()
+            await self.remove_channel(info.token.shm_name)
+
+        self._is_closed = True
+
+
+'''
+Ring buffer publisher & subscribe pattern mediated by `ringd` actor.
+
+'''
+
+
+class RingBufferPublisher(trio.abc.SendChannel[PayloadT]):
+    '''
+    Use ChannelManager to create a multi ringbuf round robin sender that can
+    dynamically add or remove more outputs.
+
+    Don't instantiate directly, use `open_ringbuf_publisher` acm to manage its
+    lifecycle.
+
+    '''
+    def __init__(
+        self,
+        n: trio.Nursery,
+
+        # amount of msgs to each ring before switching turns
+        msgs_per_turn: int = 1,
+
+        # global batch size for all channels
+        batch_size: int = 1,
+
+        encoder: Encoder | None = None
+    ):
+        self._batch_size: int = batch_size
+        self.msgs_per_turn = msgs_per_turn
+        self._enc = encoder
+
+        # helper to manage acms + long running tasks
+        self._chanmngr = ChannelManager[RingBufferSendChannel[PayloadT]](
+            n,
+            self._open_channel,
+            self._channel_task
+        )
+
+        # ensure no concurrent `.send()` calls
+        self._send_lock = trio.StrictFIFOLock()
+
+        # index of channel to be used for next send
+        self._next_turn: int = 0
+        # amount of messages sent this turn
+        self._turn_msgs: int = 0
+        # have we closed this publisher?
+        # set to `False` on `.__aenter__()`
+        self._is_closed: bool = True
+
+    @property
+    def closed(self) -> bool:
+        return self._is_closed
+
+    @property
+    def batch_size(self) -> int:
+        return self._batch_size
+
+    @batch_size.setter
+    def batch_size(self, value: int) -> None:
+        for info in self.channels:
+            info.channel.batch_size = value
+
+    @property
+    def channels(self) -> list[ChannelInfo]:
+        return self._chanmngr.channels
+
+    def _get_next_turn(self) -> int:
+        '''
+        Maybe switch turn and reset self._turn_msgs or just increment it.
+        Return current turn
+        '''
+        if self._turn_msgs == self.msgs_per_turn:
+            self._turn_msgs = 0
+            self._next_turn += 1
+
+            if self._next_turn >= len(self.channels):
+                self._next_turn = 0
+
+        else:
+            self._turn_msgs += 1
+
+        return self._next_turn
+
+    def get_channel(self, name: str) -> ChannelInfo:
+        '''
+        Get underlying ChannelInfo from name
+
+        '''
+        return self._chanmngr[name]
+
+    async def add_channel(
+        self,
+        token: RBToken,
+    ):
+        await self._chanmngr.add_channel(token)
+
+    async def remove_channel(self, name: str):
+        await self._chanmngr.remove_channel(name)
+
+    @acm
+    async def _open_channel(
+
+        self,
+        token: RBToken
+
+    ) -> AsyncContextManager[RingBufferSendChannel[PayloadT]]:
+        async with attach_to_ringbuf_sender(
+            token,
+            batch_size=self._batch_size,
+            encoder=self._enc
+        ) as ring:
+            yield ring
+
+    async def _channel_task(self, info: ChannelInfo) -> None:
+        '''
+        Wait forever until channel cancellation
+
+        '''
+        await trio.sleep_forever()
+
+    async def send(self, msg: bytes):
+        '''
+        If no output channels connected, wait until one, then fetch the next
+        channel based on turn.
+
+        Needs to acquire `self._send_lock` to ensure no concurrent calls.
+
+        '''
+        if self.closed:
+            raise trio.ClosedResourceError
+
+        if self._send_lock.locked():
+            raise trio.BusyResourceError
+
+        async with self._send_lock:
+            # wait at least one decoder connected
+            if len(self.channels) == 0:
+                await self._chanmngr.wait_for_channel()
+
+            turn = self._get_next_turn()
+
+            info = self.channels[turn]
+            await info.channel.send(msg)
+
+    async def broadcast(self, msg: PayloadT):
+        '''
+        Send a msg to all channels, if no channels connected, does nothing.
+        '''
+        if self.closed:
+            raise trio.ClosedResourceError
+
+        for info in self.channels:
+            await info.channel.send(msg)
+
+    async def flush(self, new_batch_size: int | None = None):
+        for info in self.channels:
+            try:
+                await info.channel.flush(new_batch_size=new_batch_size)
+
+            except trio.ClosedResourceError:
+                ...
+
+    async def __aenter__(self):
+        self._is_closed = False
+        self._chanmngr.open()
+        return self
+
+    async def aclose(self) -> None:
+        if self.closed:
+            log.warning('tried to close RingBufferPublisher but its already closed...')
+            return
+
+        await self._chanmngr.close()
+
+        self._is_closed = True
+
+
+class RingBufferSubscriber(trio.abc.ReceiveChannel[PayloadT]):
+    '''
+    Use ChannelManager to create a multi ringbuf receiver that can
+    dynamically add or remove more inputs and combine all into a single output.
+
+    In order for `self.receive` messages to be returned in order, publisher
+    will send all payloads as `OrderedPayload` msgpack encoded msgs, this
+    allows our channel handler tasks to just stash the out of order payloads
+    inside `self._pending_payloads` and if a in order payload is available
+    signal through `self._new_payload_event`.
+
+    On `self.receive` we wait until at least one channel is connected, then if
+    an in order payload is pending, we pop and return it, in case no in order
+    payload is available wait until next `self._new_payload_event.set()`.
+
+    '''
+    def __init__(
+        self,
+        n: trio.Nursery,
+
+        decoder: Decoder | None = None
+    ):
+        self._dec = decoder
+        self._chanmngr = ChannelManager[RingBufferReceiveChannel[PayloadT]](
+            n,
+            self._open_channel,
+            self._channel_task
+        )
+
+        self._schan, self._rchan = trio.open_memory_channel(0)
+
+        self._is_closed: bool = True
+
+        self._receive_lock = trio.StrictFIFOLock()
+
+    @property
+    def closed(self) -> bool:
+        return self._is_closed
+
+    @property
+    def channels(self) -> list[ChannelInfo]:
+        return self._chanmngr.channels
+
+    def get_channel(self, name: str):
+        return self._chanmngr[name]
+
+    async def add_channel(
+        self,
+        token: RBToken
+    ):
+        await self._chanmngr.add_channel(token)
+
+    async def remove_channel(self, name: str):
+        await self._chanmngr.remove_channel(name)
+
+    @acm
+    async def _open_channel(
+
+        self,
+        token: RBToken
+
+    ) -> AsyncContextManager[RingBufferSendChannel]:
+        async with attach_to_ringbuf_receiver(
+            token,
+            decoder=self._dec
+        ) as ring:
+            yield ring
+
+    async def _channel_task(self, info: ChannelInfo) -> None:
+        '''
+        Iterate over receive channel messages, decode them as `OrderedPayload`s
+        and stash them in `self._pending_payloads`, in case we can pop next in
+        order payload, signal through setting `self._new_payload_event`.
+
+        '''
+        while True:
+            try:
+                msg = await info.channel.receive()
+                await self._schan.send(msg)
+
+            except tractor.linux.eventfd.EFDReadCancelled as e:
+                # when channel gets removed while we are doing a receive
+                log.exception(e)
+                break
+
+            except trio.EndOfChannel:
+                break
+
+            except trio.ClosedResourceError:
+                break
+
+    async def receive(self) -> PayloadT:
+        '''
+        Receive next in order msg
+        '''
+        if self.closed:
+            raise trio.ClosedResourceError
+
+        if self._receive_lock.locked():
+            raise trio.BusyResourceError
+
+        async with self._receive_lock:
+            return await self._rchan.receive()
+
+    async def __aenter__(self):
+        self._is_closed = False
+        self._chanmngr.open()
+        return self
+
+    async def aclose(self) -> None:
+        if self.closed:
+            return
+
+        await self._chanmngr.close()
+        await self._schan.aclose()
+        await self._rchan.aclose()
+
+        self._is_closed = True
+
+
+'''
+Actor module for managing publisher & subscriber channels remotely through
+`tractor.context` rpc
+'''
+
+@dataclass
+class PublisherEntry:
+    publisher: RingBufferPublisher | None = None
+    is_set: trio.Event = trio.Event()
+
+
+_publishers: dict[str, PublisherEntry] = {}
+
+
+def maybe_init_publisher(topic: str) -> PublisherEntry:
+    entry = _publishers.get(topic, None)
+    if not entry:
+        entry = PublisherEntry()
+        _publishers[topic] = entry
+
+    return entry
+
+
+def set_publisher(topic: str, pub: RingBufferPublisher):
+    global _publishers
+
+    entry = _publishers.get(topic, None)
+    if not entry:
+        entry = maybe_init_publisher(topic)
+
+    if entry.publisher:
+        raise RuntimeError(
+            f'publisher for topic {topic} already set on {tractor.current_actor()}'
+        )
+
+    entry.publisher = pub
+    entry.is_set.set()
+
+
+def get_publisher(topic: str = 'default') -> RingBufferPublisher:
+    entry = _publishers.get(topic, None)
+    if not entry or not entry.publisher:
+        raise RuntimeError(
+            f'{tractor.current_actor()} tried to get publisher'
+            'but it\'s not set'
+        )
+
+    return entry.publisher
+
+
+async def wait_publisher(topic: str) -> RingBufferPublisher:
+    entry = maybe_init_publisher(topic)
+    await entry.is_set.wait()
+    return entry.publisher
+
+
+@tractor.context
+async def _add_pub_channel(
+    ctx: tractor.Context,
+    topic: str,
+    token: RBToken
+):
+    publisher = await wait_publisher(topic)
+    await publisher.add_channel(token)
+
+
+@tractor.context
+async def _remove_pub_channel(
+    ctx: tractor.Context,
+    topic: str,
+    ring_name: str
+):
+    publisher = await wait_publisher(topic)
+    maybe_token = fdshare.maybe_get_fds(ring_name)
+    if maybe_token:
+        await publisher.remove_channel(ring_name)
+
+
+@acm
+async def open_pub_channel_at(
+    actor_name: str,
+    token: RBToken,
+    topic: str = 'default',
+):
+    async with tractor.find_actor(actor_name) as portal:
+        await portal.run(_add_pub_channel, topic=topic, token=token)
+        try:
+            yield
+
+        except trio.Cancelled:
+            log.warning(
+                'open_pub_channel_at got cancelled!\n'
+                f'\tactor_name = {actor_name}\n'
+                f'\ttoken = {token}\n'
+            )
+            raise
+
+        await portal.run(_remove_pub_channel, topic=topic, ring_name=token.shm_name)
+
+
+@dataclass
+class SubscriberEntry:
+    subscriber: RingBufferSubscriber | None = None
+    is_set: trio.Event = trio.Event()
+
+
+_subscribers: dict[str, SubscriberEntry] = {}
+
+
+def maybe_init_subscriber(topic: str) -> SubscriberEntry:
+    entry = _subscribers.get(topic, None)
+    if not entry:
+        entry = SubscriberEntry()
+        _subscribers[topic] = entry
+
+    return entry
+
+
+def set_subscriber(topic: str, sub: RingBufferSubscriber):
+    global _subscribers
+
+    entry = _subscribers.get(topic, None)
+    if not entry:
+        entry = maybe_init_subscriber(topic)
+
+    if entry.subscriber:
+        raise RuntimeError(
+            f'subscriber for topic {topic} already set on {tractor.current_actor()}'
+        )
+
+    entry.subscriber = sub
+    entry.is_set.set()
+
+
+def get_subscriber(topic: str = 'default') -> RingBufferSubscriber:
+    entry = _subscribers.get(topic, None)
+    if not entry or not entry.subscriber:
+        raise RuntimeError(
+            f'{tractor.current_actor()} tried to get subscriber'
+            'but it\'s not set'
+        )
+
+    return entry.subscriber
+
+
+async def wait_subscriber(topic: str) -> RingBufferSubscriber:
+    entry = maybe_init_subscriber(topic)
+    await entry.is_set.wait()
+    return entry.subscriber
+
+
+@tractor.context
+async def _add_sub_channel(
+    ctx: tractor.Context,
+    topic: str,
+    token: RBToken
+):
+    subscriber = await wait_subscriber(topic)
+    await subscriber.add_channel(token)
+
+
+@tractor.context
+async def _remove_sub_channel(
+    ctx: tractor.Context,
+    topic: str,
+    ring_name: str
+):
+    subscriber = await wait_subscriber(topic)
+    maybe_token = fdshare.maybe_get_fds(ring_name)
+    if maybe_token:
+        await subscriber.remove_channel(ring_name)
+
+
+@acm
+async def open_sub_channel_at(
+    actor_name: str,
+    token: RBToken,
+    topic: str = 'default',
+):
+    async with tractor.find_actor(actor_name) as portal:
+        await portal.run(_add_sub_channel, topic=topic, token=token)
+        try:
+            yield
+
+        except trio.Cancelled:
+            log.warning(
+                'open_sub_channel_at got cancelled!\n'
+                f'\tactor_name = {actor_name}\n'
+                f'\ttoken = {token}\n'
+            )
+            raise
+
+        await portal.run(_remove_sub_channel, topic=topic, ring_name=token.shm_name)
+
+
+'''
+High level helpers to open publisher & subscriber
+'''
+
+
+@acm
+async def open_ringbuf_publisher(
+    # name to distinguish this publisher
+    topic: str = 'default',
+
+    # global batch size for channels
+    batch_size: int = 1,
+
+    # messages before changing output channel
+    msgs_per_turn: int = 1,
+
+    encoder: Encoder | None = None,
+
+    # ensure subscriber receives in same order publisher sent
+    # causes it to use wrapped payloads which contain the og
+    # index
+    guarantee_order: bool = False,
+
+    # on creation, set the `_publisher` global in order to use the provided
+    # tractor.context & helper utils for adding and removing new channels from
+    # remote actors
+    set_module_var: bool = True
+
+) -> AsyncContextManager[RingBufferPublisher]:
+    '''
+    Open a new ringbuf publisher
+
+    '''
+    async with (
+        trio.open_nursery(strict_exception_groups=False) as n,
+        RingBufferPublisher(
+            n,
+            batch_size=batch_size,
+            encoder=encoder,
+        ) as publisher
+    ):
+        if guarantee_order:
+            order_send_channel(publisher)
+
+        if set_module_var:
+            set_publisher(topic, publisher)
+
+        yield publisher
+
+        n.cancel_scope.cancel()
+
+
+@acm
+async def open_ringbuf_subscriber(
+    # name to distinguish this subscriber
+    topic: str = 'default',
+
+    decoder: Decoder | None = None,
+
+    # expect indexed payloads and unwrap them in order
+    guarantee_order: bool = False,
+
+    # on creation, set the `_subscriber` global in order to use the provided
+    # tractor.context & helper utils for adding and removing new channels from
+    # remote actors
+    set_module_var: bool = True
+) -> AsyncContextManager[RingBufferPublisher]:
+    '''
+    Open a new ringbuf subscriber
+
+    '''
+    async with (
+        trio.open_nursery(strict_exception_groups=False) as n,
+        RingBufferSubscriber(n, decoder=decoder) as subscriber
+    ):
+        # maybe monkey patch `.receive` to use indexed payloads
+        if guarantee_order:
+            order_receive_channel(subscriber)
+
+        # maybe set global module var for remote actor channel updates
+        if set_module_var:
+            set_subscriber(topic, subscriber)
+
+        yield subscriber
+
+        n.cancel_scope.cancel()

tractor/ipc/_server.py

@@ -43,7 +43,7 @@ from trio import (
     SocketListener,
 )
 
-# from ..devx import debug
+# from ..devx import _debug
 from .._exceptions import (
     TransportClosed,
 )
@@ -72,224 +72,12 @@ if TYPE_CHECKING:
 log = log.get_logger(__name__)
 
 
-async def maybe_wait_on_canced_subs(
-    uid: tuple[str, str],
-    chan: Channel,
-    disconnected: bool,
-
-    actor: Actor|None = None,
-    chan_drain_timeout: float = 0.5,
-    an_exit_timeout: float = 0.5,
-
-) -> ActorNursery|None:
-    '''
-    When a process-local actor-nursery is found for the given actor
-    `uid` (i.e. that peer is **also** a subactor of this parent), we
-    attempt to (with timeouts) wait on,
-
-    - all IPC msgs to drain on the (common) `Channel` such that all
-      local `Context`-parent-tasks can also gracefully collect
-      `ContextCancelled` msgs from their respective remote children
-      vs. a `chan_drain_timeout`.
-
-    - the actor-nursery to cancel-n-join all its supervised children
-      (processes) *gracefully* vs. a `an_exit_timeout` and thus also
-      detect cases where the IPC transport connection broke but
-      a sub-process is detected as still alive (a case that happens
-      when the subactor is still in an active debugger REPL session).
-
-    If the timeout expires in either case we ofc report with warning.
-
-    '''
-    actor = actor or _state.current_actor()
-
-    # XXX running outside actor-runtime usage,
-    # - unit testing
-    # - possibly manual usage (eventually) ?
-    if not actor:
-        return None
-
-    local_nursery: (
-        ActorNursery|None
-    ) = actor._actoruid2nursery.get(uid)
-
-    # This is set in `Portal.cancel_actor()`. So if
-    # the peer was cancelled we try to wait for them
-    # to tear down their side of the connection before
-    # moving on with closing our own side.
-    if (
-        local_nursery
-        and (
-            actor._cancel_called
-            or
-            chan._cancel_called
-        )
-        #
-        # ^-TODO-^ along with this is there another condition
-        # that we should filter with to avoid entering this
-        # waiting block needlessly?
-        # -[ ] maybe `and local_nursery.cancelled` and/or
-        #     only if the `._children` table is empty or has
-        #     only `Portal`s with .chan._cancel_called ==
-        #     True` as per what we had below; the MAIN DIFF
-        #     BEING that just bc one `Portal.cancel_actor()`
-        #     was called, doesn't mean the whole actor-nurse
-        #     is gonna exit any time soon right!?
-        #
-        # or
-        # all(chan._cancel_called for chan in chans)
-
-    ):
-        log.cancel(
-            'Waiting on cancel request to peer..\n'
-            f'c)=>\n'
-            f'  |_{chan.aid}\n'
-        )
-
-        # XXX: this is a soft wait on the channel (and its
-        # underlying transport protocol) to close from the
-        # remote peer side since we presume that any channel
-        # which is mapped to a sub-actor (i.e. it's managed
-        # by local actor-nursery) has a message that is sent
-        # to the peer likely by this actor (which may be in
-        # a shutdown sequence due to cancellation) when the
-        # local runtime here is now cancelled while
-        # (presumably) in the middle of msg loop processing.
-        chan_info: str = (
-            f'{chan.aid}\n'
-            f'|_{chan}\n'
-            f'  |_{chan.transport}\n\n'
-        )
-        with trio.move_on_after(chan_drain_timeout) as drain_cs:
-            drain_cs.shield = True
-
-            # attempt to wait for the far end to close the
-            # channel and bail after timeout (a 2-generals
-            # problem on closure).
-            assert chan.transport
-            async for msg in chan.transport.drain():
-
-                # try to deliver any lingering msgs
-                # before we destroy the channel.
-                # This accomplishes deterministic
-                # ``Portal.cancel_actor()`` cancellation by
-                # making sure any RPC response to that call is
-                # delivered the local calling task.
-                # TODO: factor this into a helper?
-                log.warning(
-                    'Draining msg from disconnected peer\n'
-                    f'{chan_info}'
-                    f'{pformat(msg)}\n'
-                )
-                # cid: str|None = msg.get('cid')
-                cid: str|None = msg.cid
-                if cid:
-                    # deliver response to local caller/waiter
-                    await actor._deliver_ctx_payload(
-                        chan,
-                        cid,
-                        msg,
-                    )
-        if drain_cs.cancelled_caught:
-            log.warning(
-                'Timed out waiting on IPC transport channel to drain?\n'
-                f'{chan_info}'
-            )
-
-        # XXX NOTE XXX when no explicit call to
-        # `open_root_actor()` was made by the application
-        # (normally we implicitly make that call inside
-        # the first `.open_nursery()` in root-actor
-        # user/app code), we can assume that either we
-        # are NOT the root actor or are root but the
-        # runtime was started manually. and thus DO have
-        # to wait for the nursery-enterer to exit before
-        # shutting down the local runtime to avoid
-        # clobbering any ongoing subactor
-        # teardown/debugging/graceful-cancel.
-        #
-        # see matching  note inside `._supervise.open_nursery()`
-        #
-        # TODO: should we have a separate cs + timeout
-        # block here?
-        if (
-            # XXX SO either,
-            #  - not root OR,
-            #  - is root but `open_root_actor()` was
-            #    entered manually (in which case we do
-            #    the equiv wait there using the
-            #    `devx.debug` sub-sys APIs).
-            not local_nursery._implicit_runtime_started
-        ):
-            log.runtime(
-                'Waiting on local actor nursery to exit..\n'
-                f'|_{local_nursery}\n'
-            )
-            with trio.move_on_after(an_exit_timeout) as an_exit_cs:
-                an_exit_cs.shield = True
-                await local_nursery.exited.wait()
-
-            # TODO: currently this is always triggering for every
-            # sub-daemon spawned from the `piker.services._mngr`?
-            # -[ ] how do we ensure that the IPC is supposed to
-            #      be long lived and isn't just a register?
-            # |_ in the register case how can we signal that the
-            #    ephemeral msg loop was intentional?
-            if (
-                # not local_nursery._implicit_runtime_started
-                # and
-                an_exit_cs.cancelled_caught
-            ):
-                report: str = (
-                    'Timed out waiting on local actor-nursery to exit?\n'
-                    f'c)>\n'
-                    f' |_{local_nursery}\n'
-                )
-                if children := local_nursery._children:
-                    # indent from above local-nurse repr
-                    report += (
-                        f'   |_{pformat(children)}\n'
-                    )
-
-                log.warning(report)
-
-        if disconnected:
-            # if the transport died and this actor is still
-            # registered within a local nursery, we report
-            # that the IPC layer may have failed
-            # unexpectedly since it may be the cause of
-            # other downstream errors.
-            entry: tuple|None = local_nursery._children.get(uid)
-            if entry:
-                proc: trio.Process
-                _, proc, _ = entry
-
-                if (
-                    (poll := getattr(proc, 'poll', None))
-                    and
-                    poll() is None  # proc still alive
-                ):
-                    # TODO: change log level based on
-                    # detecting whether chan was created for
-                    # ephemeral `.register_actor()` request!
-                    # -[ ] also, that should be avoidable by
-                    #   re-using any existing chan from the
-                    #   `._discovery.get_registry()` call as
-                    #   well..
-                    log.runtime(
-                        f'Peer IPC broke but subproc is alive?\n\n'
-
-                        f'<=x {chan.aid}@{chan.raddr}\n'
-                        f'   |_{proc}\n'
-                    )
-
-    return local_nursery
-
 # TODO multi-tpt support with per-proto peer tracking?
 #
 # -[x] maybe change to mod-func and rename for implied
 #    multi-transport semantics?
-# -[ ] register each stream/tpt/chan with the owning `Endpoint`
+#
+# -[ ] register each stream/tpt/chan with the owning `IPCEndpoint`
 #     so that we can query per tpt all peer contact infos?
 #  |_[ ] possibly provide a global viewing via a
 #        `collections.ChainMap`?
@@ -299,6 +87,7 @@ async def handle_stream_from_peer(
 
     *,
     server: IPCServer,
+    actor: Actor,
 
 ) -> None:
     '''
@@ -309,7 +98,7 @@ async def handle_stream_from_peer(
     any `IPCServer.listen_on()` passed `stream_handler_tn: Nursery`
     such that it is invoked as,
 
-      Endpoint.stream_handler_tn.start_soon(
+      IPCEndpoint.stream_handler_tn.start_soon(
           handle_stream,
           stream,
       )
@@ -318,7 +107,7 @@ async def handle_stream_from_peer(
     server._no_more_peers = trio.Event()  # unset by making new
 
     # TODO, debug_mode tooling for when hackin this lower layer?
-    # with debug.maybe_open_crash_handler(
+    # with _debug.maybe_open_crash_handler(
     #     pdb=True,
     # ) as boxerr:
 
@@ -330,10 +119,9 @@ async def handle_stream_from_peer(
 
     # initial handshake with peer phase
     try:
-        if actor := _state.current_actor():
-            peer_aid: msgtypes.Aid = await chan._do_handshake(
-                aid=actor.aid,
-            )
+        peer_aid: msgtypes.Aid = await chan._do_handshake(
+            aid=actor.aid,
+        )
     except (
         TransportClosed,
         # ^XXX NOTE, the above wraps `trio` exc types raised
@@ -434,7 +222,8 @@ async def handle_stream_from_peer(
             disconnected,
             last_msg,
         ) = await _rpc.process_messages(
-            chan=chan,
+            actor,
+            chan,
         )
     except trio.Cancelled:
         log.cancel(
@@ -445,22 +234,185 @@ async def handle_stream_from_peer(
         raise
 
     finally:
+        local_nursery: (
+            ActorNursery|None
+        ) = actor._actoruid2nursery.get(uid)
 
-        # check if there are subs which we should gracefully join at
-        # both the inter-actor-task and subprocess levels to
-        # gracefully remote cancel and later disconnect (particularly
-        # for permitting subs engaged in active debug-REPL sessions).
-        local_nursery: ActorNursery|None = await maybe_wait_on_canced_subs(
-            uid=uid,
-            chan=chan,
-            disconnected=disconnected,
-        )
+        # This is set in ``Portal.cancel_actor()``. So if
+        # the peer was cancelled we try to wait for them
+        # to tear down their side of the connection before
+        # moving on with closing our own side.
+        if (
+            local_nursery
+            and (
+                actor._cancel_called
+                or
+                chan._cancel_called
+            )
+            #
+            # ^-TODO-^ along with this is there another condition
+            # that we should filter with to avoid entering this
+            # waiting block needlessly?
+            # -[ ] maybe `and local_nursery.cancelled` and/or
+            #     only if the `._children` table is empty or has
+            #     only `Portal`s with .chan._cancel_called ==
+            #     True` as per what we had below; the MAIN DIFF
+            #     BEING that just bc one `Portal.cancel_actor()`
+            #     was called, doesn't mean the whole actor-nurse
+            #     is gonna exit any time soon right!?
+            #
+            # or
+            # all(chan._cancel_called for chan in chans)
+
+        ):
+            log.cancel(
+                'Waiting on cancel request to peer..\n'
+                f'c)=>\n'
+                f'  |_{chan.uid}\n'
+            )
+
+            # XXX: this is a soft wait on the channel (and its
+            # underlying transport protocol) to close from the
+            # remote peer side since we presume that any channel
+            # which is mapped to a sub-actor (i.e. it's managed
+            # by local actor-nursery) has a message that is sent
+            # to the peer likely by this actor (which may be in
+            # a shutdown sequence due to cancellation) when the
+            # local runtime here is now cancelled while
+            # (presumably) in the middle of msg loop processing.
+            chan_info: str = (
+                f'{chan.uid}\n'
+                f'|_{chan}\n'
+                f'  |_{chan.transport}\n\n'
+            )
+            with trio.move_on_after(0.5) as drain_cs:
+                drain_cs.shield = True
+
+                # attempt to wait for the far end to close the
+                # channel and bail after timeout (a 2-generals
+                # problem on closure).
+                assert chan.transport
+                async for msg in chan.transport.drain():
+
+                    # try to deliver any lingering msgs
+                    # before we destroy the channel.
+                    # This accomplishes deterministic
+                    # ``Portal.cancel_actor()`` cancellation by
+                    # making sure any RPC response to that call is
+                    # delivered the local calling task.
+                    # TODO: factor this into a helper?
+                    log.warning(
+                        'Draining msg from disconnected peer\n'
+                        f'{chan_info}'
+                        f'{pformat(msg)}\n'
+                    )
+                    # cid: str|None = msg.get('cid')
+                    cid: str|None = msg.cid
+                    if cid:
+                        # deliver response to local caller/waiter
+                        await actor._deliver_ctx_payload(
+                            chan,
+                            cid,
+                            msg,
+                        )
+            if drain_cs.cancelled_caught:
+                log.warning(
+                    'Timed out waiting on IPC transport channel to drain?\n'
+                    f'{chan_info}'
+                )
+
+            # XXX NOTE XXX when no explicit call to
+            # `open_root_actor()` was made by the application
+            # (normally we implicitly make that call inside
+            # the first `.open_nursery()` in root-actor
+            # user/app code), we can assume that either we
+            # are NOT the root actor or are root but the
+            # runtime was started manually. and thus DO have
+            # to wait for the nursery-enterer to exit before
+            # shutting down the local runtime to avoid
+            # clobbering any ongoing subactor
+            # teardown/debugging/graceful-cancel.
+            #
+            # see matching  note inside `._supervise.open_nursery()`
+            #
+            # TODO: should we have a separate cs + timeout
+            # block here?
+            if (
+                # XXX SO either,
+                #  - not root OR,
+                #  - is root but `open_root_actor()` was
+                #    entered manually (in which case we do
+                #    the equiv wait there using the
+                #    `devx._debug` sub-sys APIs).
+                not local_nursery._implicit_runtime_started
+            ):
+                log.runtime(
+                    'Waiting on local actor nursery to exit..\n'
+                    f'|_{local_nursery}\n'
+                )
+                with trio.move_on_after(0.5) as an_exit_cs:
+                    an_exit_cs.shield = True
+                    await local_nursery.exited.wait()
+
+                # TODO: currently this is always triggering for every
+                # sub-daemon spawned from the `piker.services._mngr`?
+                # -[ ] how do we ensure that the IPC is supposed to
+                #      be long lived and isn't just a register?
+                # |_ in the register case how can we signal that the
+                #    ephemeral msg loop was intentional?
+                if (
+                    # not local_nursery._implicit_runtime_started
+                    # and
+                    an_exit_cs.cancelled_caught
+                ):
+                    report: str = (
+                        'Timed out waiting on local actor-nursery to exit?\n'
+                        f'c)>\n'
+                        f' |_{local_nursery}\n'
+                    )
+                    if children := local_nursery._children:
+                        # indent from above local-nurse repr
+                        report += (
+                            f'   |_{pformat(children)}\n'
+                        )
+
+                    log.warning(report)
+
+            if disconnected:
+                # if the transport died and this actor is still
+                # registered within a local nursery, we report
+                # that the IPC layer may have failed
+                # unexpectedly since it may be the cause of
+                # other downstream errors.
+                entry: tuple|None = local_nursery._children.get(uid)
+                if entry:
+                    proc: trio.Process
+                    _, proc, _ = entry
+
+                    if (
+                        (poll := getattr(proc, 'poll', None))
+                        and
+                        poll() is None  # proc still alive
+                    ):
+                        # TODO: change log level based on
+                        # detecting whether chan was created for
+                        # ephemeral `.register_actor()` request!
+                        # -[ ] also, that should be avoidable by
+                        #   re-using any existing chan from the
+                        #   `._discovery.get_registry()` call as
+                        #   well..
+                        log.runtime(
+                            f'Peer IPC broke but subproc is alive?\n\n'
+
+                            f'<=x {chan.uid}@{chan.raddr}\n'
+                            f'   |_{proc}\n'
+                        )
 
         # ``Channel`` teardown and closure sequence
         # drop ref to channel so it can be gc-ed and disconnected
         con_teardown_status: str = (
             f'IPC channel disconnected:\n'
-            f'<=x uid: {chan.aid}\n'
+            f'<=x uid: {chan.uid}\n'
             f'   |_{pformat(chan)}\n\n'
         )
         chans.remove(chan)
@@ -468,7 +420,7 @@ async def handle_stream_from_peer(
         # TODO: do we need to be this pedantic?
         if not chans:
             con_teardown_status += (
-                f'-> No more channels with {chan.aid}'
+                f'-> No more channels with {chan.uid}'
             )
             server._peers.pop(uid, None)
 
@@ -504,8 +456,8 @@ async def handle_stream_from_peer(
                 and
                 _state.is_debug_mode()
             ):
-                from ..devx import debug
-                pdb_lock = debug.Lock
+                from ..devx import _debug
+                pdb_lock = _debug.Lock
                 pdb_lock._blocked.add(uid)
 
                 # TODO: NEEEDS TO BE TESTED!
@@ -515,11 +467,11 @@ async def handle_stream_from_peer(
                 # from broken debug TTY locking due to
                 # msg-spec races on application using RunVar...
                 if (
-                    local_nursery
-                    and
                     (ctx_in_debug := pdb_lock.ctx_in_debug)
                     and
-                    (pdb_user_uid := ctx_in_debug.chan.aid)
+                    (pdb_user_uid := ctx_in_debug.chan.uid)
+                    and
+                    local_nursery
                 ):
                     entry: tuple|None = local_nursery._children.get(
                         tuple(pdb_user_uid)
@@ -540,7 +492,7 @@ async def handle_stream_from_peer(
                                 f'last disconnected child uid: {uid}\n'
                                 f'locking child uid: {pdb_user_uid}\n'
                             )
-                            await debug.maybe_wait_for_debugger(
+                            await _debug.maybe_wait_for_debugger(
                                 child_in_debug=True
                             )
 
@@ -577,7 +529,7 @@ async def handle_stream_from_peer(
     # finally block closure
 
 
-class Endpoint(Struct):
+class IPCEndpoint(Struct):
     '''
     An instance of an IPC "bound" address where the lifetime of the
     "ability to accept connections" (from clients) and then handle
@@ -636,7 +588,7 @@ class Endpoint(Struct):
         )
 
 
-class Server(Struct):
+class IPCServer(Struct):
     _parent_tn: Nursery
     _stream_handler_tn: Nursery
     # level-triggered sig for whether "no peers are currently
@@ -644,7 +596,7 @@ class Server(Struct):
     # initialized with `.is_set() == True`.
     _no_more_peers: trio.Event
 
-    _endpoints: list[Endpoint] = []
+    _endpoints: list[IPCEndpoint] = []
 
     # connection tracking & mgmt
     _peers: defaultdict[
@@ -659,10 +611,10 @@ class Server(Struct):
     # syncs for setup/teardown sequences
     _shutdown: trio.Event|None = None
 
-    # TODO, maybe just make `._endpoints: list[Endpoint]` and
+    # TODO, maybe just make `._endpoints: list[IPCEndpoint]` and
     # provide dict-views onto it?
     # @property
-    # def addrs2eps(self) -> dict[Address, Endpoint]:
+    # def addrs2eps(self) -> dict[Address, IPCEndpoint]:
     #     ...
 
     @property
@@ -708,7 +660,7 @@ class Server(Struct):
             await self._shutdown.wait()
         else:
             tpt_protos: list[str] = []
-            ep: Endpoint
+            ep: IPCEndpoint
             for ep in self._endpoints:
                 tpt_protos.append(ep.addr.proto_key)
 
@@ -790,7 +742,7 @@ class Server(Struct):
 
     def epsdict(self) -> dict[
         Address,
-        Endpoint,
+        IPCEndpoint,
     ]:
         return {
             ep.addr: ep
@@ -804,7 +756,7 @@ class Server(Struct):
         return ev.is_set()
 
     def pformat(self) -> str:
-        eps: list[Endpoint] = self._endpoints
+        eps: list[IPCEndpoint] = self._endpoints
 
         state_repr: str = (
             f'{len(eps)!r} IPC-endpoints active'
@@ -835,13 +787,13 @@ class Server(Struct):
 
     # TODO? maybe allow shutting down a `.listen_on()`s worth of
     # listeners by cancelling the corresponding
-    # `Endpoint._listen_tn` only ?
+    # `IPCEndpoint._listen_tn` only ?
     # -[ ] in theory you could use this to
     #     "boot-and-wait-for-reconnect" of all current and connecting
     #     peers?
     #  |_ would require that the stream-handler is intercepted so we
     #     can intercept every `MsgTransport` (stream) and track per
-    #     `Endpoint` likely?
+    #     `IPCEndpoint` likely?
     #
     # async def unlisten(
     #     self,
@@ -852,9 +804,10 @@ class Server(Struct):
     async def listen_on(
         self,
         *,
+        actor: Actor,
         accept_addrs: list[tuple[str, int|str]]|None = None,
         stream_handler_nursery: Nursery|None = None,
-    ) -> list[Endpoint]:
+    ) -> list[IPCEndpoint]:
         '''
         Start `SocketListeners` (i.e. bind and call `socket.listen()`)
         for all IPC-transport-protocol specific `Address`-types
@@ -884,19 +837,20 @@ class Server(Struct):
                 f'{self}\n'
             )
 
-        log.runtime(
+        log.info(
             f'Binding to endpoints for,\n'
             f'{accept_addrs}\n'
         )
-        eps: list[Endpoint] = await self._parent_tn.start(
+        eps: list[IPCEndpoint] = await self._parent_tn.start(
             partial(
                 _serve_ipc_eps,
+                actor=actor,
                 server=self,
                 stream_handler_tn=stream_handler_nursery,
                 listen_addrs=accept_addrs,
             )
         )
-        log.runtime(
+        log.info(
             f'Started IPC endpoints\n'
             f'{eps}\n'
         )
@@ -904,7 +858,7 @@ class Server(Struct):
         self._endpoints.extend(eps)
         # XXX, just a little bit of sanity
         group_tn: Nursery|None = None
-        ep: Endpoint
+        ep: IPCEndpoint
         for ep in eps:
             if ep.addr not in self.addrs:
                 breakpoint()
@@ -917,12 +871,9 @@ class Server(Struct):
         return eps
 
 
-# alias until we decide on final naming
-IPCServer = Server
-
-
 async def _serve_ipc_eps(
     *,
+    actor: Actor,
     server: IPCServer,
     stream_handler_tn: Nursery,
     listen_addrs: list[tuple[str, int|str]],
@@ -945,24 +896,23 @@ async def _serve_ipc_eps(
         listen_tn: Nursery
         async with trio.open_nursery() as listen_tn:
 
-            eps: list[Endpoint] = []
+            eps: list[IPCEndpoint] = []
             # XXX NOTE, required to call `serve_listeners()` below.
             # ?TODO, maybe just pass `list(eps.values()` tho?
             listeners: list[trio.abc.Listener] = []
             for addr in listen_addrs:
-                ep = Endpoint(
+                ep = IPCEndpoint(
                     addr=addr,
                     listen_tn=listen_tn,
                     stream_handler_tn=stream_handler_tn,
                 )
                 try:
-                    log.runtime(
+                    log.info(
                         f'Starting new endpoint listener\n'
                         f'{ep}\n'
                     )
                     listener: trio.abc.Listener = await ep.start_listener()
                     assert listener is ep._listener
-                    # actor = _state.current_actor()
                     # if actor.is_registry:
                     #     import pdbp; pdbp.set_trace()
 
@@ -987,6 +937,7 @@ async def _serve_ipc_eps(
                     handler=partial(
                         handle_stream_from_peer,
                         server=server,
+                        actor=actor,
                     ),
                     listeners=listeners,
 
@@ -997,13 +948,13 @@ async def _serve_ipc_eps(
                 )
             )
             # TODO, wow make this message better! XD
-            log.runtime(
+            log.info(
                 'Started server(s)\n'
                 +
                 '\n'.join([f'|_{addr}' for addr in listen_addrs])
             )
 
-            log.runtime(
+            log.info(
                 f'Started IPC endpoints\n'
                 f'{eps}\n'
             )
@@ -1014,12 +965,11 @@ async def _serve_ipc_eps(
     finally:
         if eps:
             addr: Address
-            ep: Endpoint
+            ep: IPCEndpoint
             for addr, ep in server.epsdict().items():
                 ep.close_listener()
                 server._endpoints.remove(ep)
 
-        # actor = _state.current_actor()
         # if actor.is_arbiter:
         #     import pdbp; pdbp.set_trace()
 
@@ -1030,6 +980,7 @@ async def _serve_ipc_eps(
 
 @acm
 async def open_ipc_server(
+    actor: Actor,
     parent_tn: Nursery|None = None,
     stream_handler_tn: Nursery|None = None,
 

tractor/ipc/_tcp.py

@@ -18,7 +18,6 @@ TCP implementation of tractor.ipc._transport.MsgTransport protocol
 
 '''
 from __future__ import annotations
-import ipaddress
 from typing import (
     ClassVar,
 )
@@ -51,45 +50,13 @@ class TCPAddress(
     _host: str
     _port: int
 
-    def __post_init__(self):
-        try:
-            ipaddress.ip_address(self._host)
-        except ValueError as valerr:
-            raise ValueError(
-                'Invalid {type(self).__name__}._host = {self._host!r}\n'
-            ) from valerr
-
     proto_key: ClassVar[str] = 'tcp'
     unwrapped_type: ClassVar[type] = tuple[str, int]
     def_bindspace: ClassVar[str] = '127.0.0.1'
 
-    # ?TODO, actually validate ipv4/6 with stdlib's `ipaddress`
     @property
     def is_valid(self) -> bool:
-        '''
-        Predicate to ensure a valid socket-address pair.
-
-        '''
-        return (
-            self._port != 0
-            and
-            (ipaddr := ipaddress.ip_address(self._host))
-            and not (
-                ipaddr.is_reserved
-                or
-                ipaddr.is_unspecified
-                or
-                ipaddr.is_link_local
-                or
-                ipaddr.is_link_local
-                or
-                ipaddr.is_multicast
-                or
-                ipaddr.is_global
-            )
-        )
-        # ^XXX^ see various properties of invalid addrs here,
-        # https://docs.python.org/3/library/ipaddress.html#ipaddress.IPv4Address
+        return self._port != 0
 
     @property
     def bindspace(self) -> str:
@@ -160,11 +127,6 @@ async def start_listener(
     Start a TCP socket listener on the given `TCPAddress`.
 
     '''
-    log.info(
-        f'Attempting to bind TCP socket\n'
-        f'>[\n'
-        f'|_{addr}\n'
-    )
     # ?TODO, maybe we should just change the lower-level call this is
     # using internall per-listener?
     listeners: list[SocketListener] = await open_tcp_listeners(
@@ -178,12 +140,6 @@ async def start_listener(
     assert len(listeners) == 1
     listener = listeners[0]
     host, port = listener.socket.getsockname()[:2]
-
-    log.info(
-        f'Listening on TCP socket\n'
-        f'[>\n'
-        f' |_{addr}\n'
-    )
     return listener
 
 

tractor/ipc/_transport.py

@@ -78,7 +78,7 @@ class MsgTransport(Protocol):
 # eventual msg definition/types?
 # - https://docs.python.org/3/library/typing.html#typing.Protocol
 
-    stream: trio.SocketStream
+    stream: trio.abc.Stream
     drained: list[MsgType]
 
     address_type: ClassVar[Type[Address]]

tractor/linux/__init__.py

@@ -0,0 +1,15 @@
+# tractor: structured concurrent "actors".
+# Copyright 2018-eternity Tyler Goodlet.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.

tractor/linux/_fdshare.py

@@ -0,0 +1,316 @@
+# tractor: structured concurrent "actors".
+# Copyright 2018-eternity Tyler Goodlet.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+'''
+Reimplementation of multiprocessing.reduction.sendfds & recvfds, using acms and trio.
+
+cpython impl:
+https://github.com/python/cpython/blob/275056a7fdcbe36aaac494b4183ae59943a338eb/Lib/multiprocessing/reduction.py#L138
+'''
+import os
+import array
+import tempfile
+from uuid import uuid4
+from pathlib import Path
+from typing import AsyncContextManager
+from contextlib import asynccontextmanager as acm
+
+import trio
+import tractor
+from trio import socket
+
+
+log = tractor.log.get_logger(__name__)
+
+
+class FDSharingError(Exception):
+    ...
+
+
+@acm
+async def send_fds(fds: list[int], sock_path: str) -> AsyncContextManager[None]:
+    '''
+    Async trio reimplementation of `multiprocessing.reduction.sendfds`
+
+    https://github.com/python/cpython/blob/275056a7fdcbe36aaac494b4183ae59943a338eb/Lib/multiprocessing/reduction.py#L142
+
+    It's implemented using an async context manager in order to simplyfy usage
+    with `tractor.context`s, we can open a context in a remote actor that uses
+    this acm inside of it, and uses `ctx.started()` to signal the original
+    caller actor to perform the `recv_fds` call.
+
+    See `tractor.ipc._ringbuf._ringd._attach_to_ring` for an example.
+    '''
+    sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
+    await sock.bind(sock_path)
+    sock.listen(1)
+
+    yield  # socket is setup, ready for receiver connect
+
+    # wait until receiver connects
+    conn, _ = await sock.accept()
+
+    # setup int array for fds
+    fds = array.array('i', fds)
+
+    # first byte of msg will be len of fds to send % 256, acting as a fd amount
+    # verification on `recv_fds` we refer to it as `check_byte`
+    msg = bytes([len(fds) % 256])
+
+    # send msg with custom SCM_RIGHTS type
+    await conn.sendmsg(
+        [msg],
+        [(socket.SOL_SOCKET, socket.SCM_RIGHTS, fds)]
+    )
+
+    # finally wait receiver ack
+    if await conn.recv(1) != b'A':
+        raise FDSharingError('did not receive acknowledgement of fd')
+
+    conn.close()
+    sock.close()
+    os.unlink(sock_path)
+
+
+async def recv_fds(sock_path: str, amount: int) -> tuple:
+    '''
+    Async trio reimplementation of `multiprocessing.reduction.recvfds`
+
+    https://github.com/python/cpython/blob/275056a7fdcbe36aaac494b4183ae59943a338eb/Lib/multiprocessing/reduction.py#L150
+
+    It's equivalent to std just using `trio.open_unix_socket` for connecting and
+    changes on error handling.
+
+    See `tractor.ipc._ringbuf._ringd._attach_to_ring` for an example.
+    '''
+    stream = await trio.open_unix_socket(sock_path)
+    sock = stream.socket
+
+    # prepare int array for fds
+    a = array.array('i')
+    bytes_size = a.itemsize * amount
+
+    # receive 1 byte + space necesary for SCM_RIGHTS msg for {amount} fds
+    msg, ancdata, flags, addr = await sock.recvmsg(
+        1, socket.CMSG_SPACE(bytes_size)
+    )
+
+    # maybe failed to receive msg?
+    if not msg and not ancdata:
+        raise FDSharingError(f'Expected to receive {amount} fds from {sock_path}, but got EOF')
+
+    # send ack, std comment mentions this ack pattern was to get around an
+    # old macosx bug, but they are not sure if its necesary any more, in
+    # any case its not a bad pattern to keep
+    await sock.send(b'A')  # Ack
+
+    # expect to receive only one `ancdata` item
+    if len(ancdata) != 1:
+        raise FDSharingError(
+            f'Expected to receive exactly one \"ancdata\" but got {len(ancdata)}: {ancdata}'
+        )
+
+    # unpack SCM_RIGHTS msg
+    cmsg_level, cmsg_type, cmsg_data = ancdata[0]
+
+    # check proper msg type
+    if cmsg_level != socket.SOL_SOCKET:
+        raise FDSharingError(
+            f'Expected CMSG level to be SOL_SOCKET({socket.SOL_SOCKET}) but got {cmsg_level}'
+        )
+
+    if cmsg_type != socket.SCM_RIGHTS:
+        raise FDSharingError(
+            f'Expected CMSG type to be SCM_RIGHTS({socket.SCM_RIGHTS}) but got {cmsg_type}'
+        )
+
+    # check proper data alignment
+    length = len(cmsg_data)
+    if length % a.itemsize != 0:
+        raise FDSharingError(
+            f'CMSG data alignment error: len of {length} is not divisible by int size {a.itemsize}'
+        )
+
+    # attempt to cast as int array
+    a.frombytes(cmsg_data)
+
+    # validate length check byte
+    valid_check_byte = amount % 256  # check byte acording to `recv_fds` caller
+    recvd_check_byte = msg[0]  # actual received check byte
+    payload_check_byte = len(a) % 256  # check byte acording to received fd int array
+
+    if recvd_check_byte != payload_check_byte:
+        raise FDSharingError(
+            'Validation failed: received check byte '
+            f'({recvd_check_byte}) does not match fd int array len % 256 ({payload_check_byte})'
+        )
+
+    if valid_check_byte != recvd_check_byte:
+        raise FDSharingError(
+            'Validation failed: received check byte '
+            f'({recvd_check_byte}) does not match expected fd amount % 256 ({valid_check_byte})'
+        )
+
+    return tuple(a)
+
+
+'''
+Share FD actor module
+
+Add "tractor.linux._fdshare" to enabled modules on actors to allow sharing of
+FDs with other actors.
+
+Use `share_fds` function to register a set of fds with a name, then other
+actors can use `request_fds_from` function to retrieve the fds.
+
+Use `unshare_fds` to disable sharing of  a set of FDs.
+
+'''
+
+FDType = tuple[int]
+
+_fds: dict[str, FDType] = {}
+
+
+def maybe_get_fds(name: str) -> FDType | None:
+    '''
+    Get registered FDs with a given name or return None
+
+    '''
+    return _fds.get(name, None)
+
+
+def get_fds(name: str) -> FDType:
+    '''
+    Get registered FDs with a given name or raise
+    '''
+    fds = maybe_get_fds(name)
+
+    if not fds:
+        raise RuntimeError(f'No FDs with name {name} found!')
+
+    return fds
+
+
+def share_fds(
+    name: str,
+    fds: tuple[int],
+) -> None:
+    '''
+    Register a set of fds to be shared under a given name.
+
+    '''
+    this_actor = tractor.current_actor()
+    if __name__ not in this_actor.enable_modules:
+        raise RuntimeError(
+            f'Tried to share FDs {fds} with name {name}, but '
+            f'module {__name__} is not enabled in actor {this_actor.name}!'
+        )
+
+    maybe_fds = maybe_get_fds(name)
+    if maybe_fds:
+        raise RuntimeError(f'share FDs: {maybe_fds} already tied to name {name}')
+
+    _fds[name] = fds
+
+
+def unshare_fds(name: str) -> None:
+    '''
+    Unregister a set of fds to disable sharing them.
+
+    '''
+    get_fds(name)  # raise if not exists
+
+    del _fds[name]
+
+
+@tractor.context
+async def _pass_fds(
+    ctx: tractor.Context,
+    name: str,
+    sock_path: str
+) -> None:
+    '''
+    Endpoint to request a set of FDs from current actor, will use `ctx.started`
+    to send original FDs, then `send_fds` will block until remote side finishes
+    the `recv_fds` call.
+
+    '''
+    # get fds or raise error
+    fds = get_fds(name)
+
+    # start fd passing context using socket on `sock_path`
+    async with send_fds(fds, sock_path):
+        # send original fds through ctx.started
+        await ctx.started(fds)
+
+
+async def request_fds_from(
+    actor_name: str,
+    fds_name: str
+) -> FDType:
+    '''
+    Use this function to retreive shared FDs from `actor_name`.
+
+    '''
+    this_actor = tractor.current_actor()
+
+    # create a temporary path for the UDS sock
+    sock_path = str(
+        Path(tempfile.gettempdir())
+        /
+        f'{fds_name}-from-{actor_name}-to-{this_actor.name}.sock'
+    )
+
+    # having a socket path length > 100 aprox can cause:
+    # OSError: AF_UNIX path too long
+    # https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_un.h.html#tag_13_67_04
+
+    # attempt sock path creation with smaller names
+    if len(sock_path) > 100:
+        sock_path = str(
+            Path(tempfile.gettempdir())
+            /
+            f'{fds_name}-to-{this_actor.name}.sock'
+        )
+
+        if len(sock_path) > 100:
+            # just use uuid4
+            sock_path = str(
+                Path(tempfile.gettempdir())
+                /
+                f'pass-fds-{uuid4()}.sock'
+            )
+
+    async with (
+        tractor.find_actor(actor_name) as portal,
+
+        portal.open_context(
+            _pass_fds,
+            name=fds_name,
+            sock_path=sock_path
+        ) as (ctx, fds_info),
+    ):
+        # get original FDs
+        og_fds = fds_info
+
+        # retrieve copies of FDs
+        fds = await recv_fds(sock_path, len(og_fds))
+
+        log.info(
+            f'{this_actor.name} received fds: {og_fds} -> {fds}'
+        )
+
+        return fds

tractor/linux/eventfd.py

@@ -14,7 +14,7 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 '''
-Linux specifics, for now we are only exposing EventFD
+Expose libc eventfd APIs
 
 '''
 import os
@@ -108,6 +108,10 @@ def close_eventfd(fd: int) -> int:
         raise OSError(errno.errorcode[ffi.errno], 'close failed')
 
 
+class EFDReadCancelled(Exception):
+    ...
+
+
 class EventFD:
     '''
     Use a previously opened eventfd(2), meant to be used in
@@ -124,26 +128,82 @@ class EventFD:
         self._fd: int = fd
         self._omode: str = omode
         self._fobj = None
+        self._cscope: trio.CancelScope | None = None
+        self._is_closed: bool = True
+        self._read_lock = trio.StrictFIFOLock()
+
+    @property
+    def closed(self) -> bool:
+        return self._is_closed
 
     @property
     def fd(self) -> int | None:
         return self._fd
 
     def write(self, value: int) -> int:
+        if self.closed:
+            raise trio.ClosedResourceError
+
         return write_eventfd(self._fd, value)
 
     async def read(self) -> int:
-        return await trio.to_thread.run_sync(
-            read_eventfd, self._fd,
-            abandon_on_cancel=True
-        )
+        '''
+        Async wrapper for `read_eventfd(self.fd)`
+
+        `trio.to_thread.run_sync` is used, need to use a `trio.CancelScope`
+        in order to make it cancellable when `self.close()` is called.
+
+        '''
+        if self.closed:
+            raise trio.ClosedResourceError
+
+        if self._read_lock.locked():
+            raise trio.BusyResourceError
+
+        async with self._read_lock:
+            self._cscope = trio.CancelScope()
+            with self._cscope:
+                try:
+                    return await trio.to_thread.run_sync(
+                        read_eventfd, self._fd,
+                        abandon_on_cancel=True
+                    )
+
+                except OSError as e:
+                    if e.errno != errno.EBADF:
+                        raise
+
+                    raise trio.BrokenResourceError
+
+            if self._cscope.cancelled_caught:
+                raise EFDReadCancelled
+
+            self._cscope = None
+
+    def read_nowait(self) -> int:
+        '''
+        Direct call to `read_eventfd(self.fd)`, unless `eventfd` was
+        opened with `EFD_NONBLOCK` its gonna block the thread.
+
+        '''
+        return read_eventfd(self._fd)
 
     def open(self):
         self._fobj = os.fdopen(self._fd, self._omode)
+        self._is_closed = False
 
     def close(self):
         if self._fobj:
-            self._fobj.close()
+            try:
+                self._fobj.close()
+
+            except OSError:
+                ...
+
+        if self._cscope:
+            self._cscope.cancel()
+
+        self._is_closed = True
 
     def __enter__(self):
         self.open()

tractor/log.py

@@ -270,9 +270,7 @@ def get_logger(
     subsys_spec: str|None = None,
 
 ) -> StackLevelAdapter:
-    '''
-    Return the `tractor`-library root logger or a sub-logger for
-    `name` if provided.
+    '''Return the package log or a sub-logger for ``name`` if provided.
 
     '''
     log: Logger
@@ -284,7 +282,7 @@ def get_logger(
         name != _proj_name
     ):
 
-        # NOTE: for handling for modules that use `get_logger(__name__)`
+        # NOTE: for handling for modules that use ``get_logger(__name__)``
         # we make the following stylistic choice:
         # - always avoid duplicate project-package token
         #   in msg output: i.e. tractor.tractor.ipc._chan.py in header
@@ -333,7 +331,7 @@ def get_logger(
 
 def get_console_log(
     level: str|None = None,
-    logger: Logger|StackLevelAdapter|None = None,
+    logger: Logger|None = None,
     **kwargs,
 
 ) -> LoggerAdapter:
@@ -346,23 +344,12 @@ def get_console_log(
     Yeah yeah, i know we can use `logging.config.dictConfig()`. You do it.
 
     '''
-    # get/create a stack-aware-adapter
-    if (
-        logger
-        and
-        isinstance(logger, StackLevelAdapter)
-    ):
-        # XXX, for ex. when passed in by a caller wrapping some
-        # other lib's logger instance with our level-adapter.
-        log = logger
+    log = get_logger(
+        logger=logger,
+        **kwargs
+    )  # set a root logger
+    logger: Logger = log.logger
 
-    else:
-        log: StackLevelAdapter = get_logger(
-            logger=logger,
-            **kwargs
-        )
-
-    logger: Logger|StackLevelAdapter = log.logger
     if not level:
         return log
 
@@ -380,7 +367,10 @@ def get_console_log(
             None,
         )
     ):
-        fmt: str = LOG_FORMAT  # always apply our format?
+        fmt = LOG_FORMAT
+        # if logger:
+        #     fmt = None
+
         handler = StreamHandler()
         formatter = colorlog.ColoredFormatter(
             fmt=fmt,

tractor/msg/_codec.py

@@ -39,13 +39,11 @@ from contextvars import (
 )
 import textwrap
 from typing import (
-    Any,
-    Callable,
-    Protocol,
-    Type,
     TYPE_CHECKING,
-    TypeVar,
+    Any,
+    Type,
     Union,
+    Callable,
 )
 from types import ModuleType
 
@@ -54,6 +52,13 @@ from msgspec import (
     msgpack,
     Raw,
 )
+from msgspec.inspect import (
+    CustomType,
+    UnionType,
+    SetType,
+    ListType,
+    TupleType
+)
 # TODO: see notes below from @mikenerone..
 # from tricycle import TreeVar
 
@@ -81,7 +86,7 @@ class MsgDec(Struct):
 
     '''
     _dec: msgpack.Decoder
-    # _ext_types_box: Struct|None = None
+    _ext_types_boxes: dict[Type, Struct] = {}
 
     @property
     def dec(self) -> msgpack.Decoder:
@@ -226,6 +231,8 @@ def mk_dec(
             f'ext_types = {ext_types!r}\n'
         )
 
+    _boxed_structs: dict[Type, Struct] = {}
+
     if dec_hook:
         if ext_types is None:
             raise TypeError(
@@ -237,17 +244,15 @@ def mk_dec(
                 f'ext_types = {ext_types!r}\n'
             )
 
-        # XXX, i *thought* we would require a boxing struct as per docs,
-        # https://jcristharif.com/msgspec/extending.html#mapping-to-from-native-types
-        # |_ see comment,
-        #  > Note that typed deserialization is required for
-        #  > successful roundtripping here, so we pass `MyMessage` to
-        #  > `Decoder`.
-        #
-        # BUT, turns out as long as you spec a union with `Raw` it
-        # will work? kk B)
-        #
-        # maybe_box_struct = mk_boxed_ext_struct(ext_types)
+        if len(ext_types) > 1:
+            _boxed_structs = mk_boxed_ext_structs(ext_types)
+            ext_types = [
+                etype
+                for etype in ext_types
+                if etype not in _boxed_structs
+            ]
+            ext_types += list(_boxed_structs.values())
+
         spec = Raw | Union[*ext_types]
 
     return MsgDec(
@@ -255,29 +260,26 @@ def mk_dec(
             type=spec,  # like `MsgType[Any]`
             dec_hook=dec_hook,
         ),
+        _ext_types_boxes=_boxed_structs
     )
 
 
-# TODO? remove since didn't end up needing this?
-def mk_boxed_ext_struct(
+def mk_boxed_ext_structs(
     ext_types: list[Type],
-) -> Struct:
-    # NOTE, originally was to wrap non-msgpack-supported "extension
-    # types" in a field-typed boxing struct, see notes around the
-    # `dec_hook()` branch in `mk_dec()`.
-    ext_types_union = Union[*ext_types]
-    repr_ext_types_union: str = (
-        str(ext_types_union)
-        or
-        "|".join(ext_types)
-    )
-    BoxedExtType = msgspec.defstruct(
-        f'BoxedExts[{repr_ext_types_union}]',
-        fields=[
-            ('boxed', ext_types_union),
-        ],
-    )
-    return BoxedExtType
+) -> dict[Type, Struct]:
+    box_types: dict[Type, Struct] = {}
+    for ext_type in ext_types:
+        info = msgspec.inspect.type_info(ext_type)
+        if isinstance(info, CustomType):
+            box_types[ext_type] = msgspec.defstruct(
+                f'Box{ext_type.__name__}',
+                tag=True,
+                fields=[
+                    ('inner', ext_type),
+                ],
+            )
+
+    return box_types
 
 
 def unpack_spec_types(
@@ -378,7 +380,7 @@ class MsgCodec(Struct):
     _dec: msgpack.Decoder
     _pld_spec: Type[Struct]|Raw|Any
 
-    # _ext_types_box: Struct|None = None
+    _ext_types_boxes: dict[Type, Struct] = {}
 
     def __repr__(self) -> str:
         speclines: str = textwrap.indent(
@@ -465,45 +467,29 @@ class MsgCodec(Struct):
 
         '''
         __tracebackhide__: bool = hide_tb
-        if use_buf:
-            self._enc.encode_into(py_obj, self._buf)
-            return self._buf
 
-        return self._enc.encode(py_obj)
-        # try:
-        #     return self._enc.encode(py_obj)
-        # except TypeError as typerr:
-        #     typerr.add_note(
-        #         '|_src error from `msgspec`'
-        #         # f'|_{self._enc.encode!r}'
-        #     )
-        #     raise typerr
+        try:
 
-        # TODO! REMOVE once i'm confident we won't ever need it!
-        #
-        # box: Struct = self._ext_types_box
-        # if (
-        #     as_ext_type
-        #     or
-        #     (
-        #         # XXX NOTE, auto-detect if the input type
-        #         box
-        #         and
-        #         (ext_types := unpack_spec_types(
-        #             spec=box.__annotations__['boxed'])
-        #         )
-        #     )
-        # ):
-        #     match py_obj:
-        #         # case PayloadMsg(pld=pld) if (
-        #         #     type(pld) in ext_types
-        #         # ):
-        #         #     py_obj.pld = box(boxed=py_obj)
-        #         #     breakpoint()
-        #         case _ if (
-        #             type(py_obj) in ext_types
-        #         ):
-        #             py_obj = box(boxed=py_obj)
+            box: Struct|None = self._ext_types_boxes.get(type(py_obj), None)
+            if (
+                as_ext_type
+                or
+                box
+            ):
+                py_obj = box(inner=py_obj)
+
+            if use_buf:
+                self._enc.encode_into(py_obj, self._buf)
+                return self._buf
+
+            return self._enc.encode(py_obj)
+
+        except TypeError as typerr:
+            typerr.add_note(
+                '|_src error from `msgspec`'
+                # f'|_{self._enc.encode!r}'
+            )
+            raise typerr
 
     @property
     def dec(self) -> msgpack.Decoder:
@@ -565,11 +551,6 @@ def mk_codec(
     enc_hook: Callable|None = None,
     ext_types: list[Type]|None = None,
 
-    # optionally provided msg-decoder from which we pull its,
-    # |_.dec_hook()
-    # |_.type
-    ext_dec: MsgDec|None = None
-    #
     # ?TODO? other params we might want to support
     # Encoder:
     # write_buffer_size=write_buffer_size,
@@ -597,12 +578,6 @@ def mk_codec(
             )
 
     dec_hook: Callable|None = None
-    if ext_dec:
-        dec: msgspec.Decoder = ext_dec.dec
-        dec_hook = dec.dec_hook
-        pld_spec |= dec.type
-        if ext_types:
-            pld_spec |= Union[*ext_types]
 
     # (manually) generate a msg-spec (how appropes) for all relevant
     # payload-boxing-struct-msg-types, parameterizing the
@@ -630,10 +605,16 @@ def mk_codec(
     enc = msgpack.Encoder(
        enc_hook=enc_hook,
     )
+
+    boxes = {}
+    if ext_types and len(ext_types) > 1:
+        boxes = mk_boxed_ext_structs(ext_types)
+
     codec = MsgCodec(
         _enc=enc,
         _dec=dec,
         _pld_spec=pld_spec,
+        _ext_types_boxes=boxes
     )
     # sanity on expected backend support
     assert codec.lib.__name__ == libname
@@ -809,78 +790,298 @@ def limit_msg_spec(
     assert curr_codec is current_codec()
 
 
-# XXX: msgspec won't allow this with non-struct custom types
-# like `NamespacePath`!@!
-# @cm
-# def extend_msg_spec(
-#     payload_spec: Union[Type[Struct]],
+'''
+Encoder / Decoder generic hook factory
 
-# ) -> MsgCodec:
-#     '''
-#     Extend the current `MsgCodec.pld_spec` (type set) by extending
-#     the payload spec to **include** the types specified by
-#     `payload_spec`.
-
-#     '''
-#     codec: MsgCodec = current_codec()
-#     pld_spec: Union[Type] = codec.pld_spec
-#     extended_spec: Union[Type] = pld_spec|payload_spec
-
-#     with limit_msg_spec(payload_types=extended_spec) as ext_codec:
-#         # import pdbp; pdbp.set_trace()
-#         assert ext_codec.pld_spec == extended_spec
-#         yield ext_codec
-#
-# ^-TODO-^ is it impossible to make something like this orr!?
-
-# TODO: make an auto-custom hook generator from a set of input custom
-# types?
-# -[ ] below is a proto design using a `TypeCodec` idea?
-#
-# type var for the expected interchange-lib's
-# IPC-transport type when not available as a built-in
-# serialization output.
-WireT = TypeVar('WireT')
+'''
 
 
-# TODO: some kinda (decorator) API for built-in subtypes
-# that builds this implicitly by inspecting the `mro()`?
-class TypeCodec(Protocol):
+# builtins we can have in same pld_spec as custom types
+default_builtins = (
+    None,
+    bool,
+    int,
+    float,
+    bytes,
+    list
+)
+
+
+# spec definition type
+TypeSpec = (
+    Type |
+    Union[Type] |
+    list[Type] |
+    tuple[Type] |
+    set[Type]
+)
+
+
+class TypeCodec:
     '''
-    A per-custom-type wire-transport serialization translator
-    description type.
+    This class describes a way of encoding to or decoding from a "wire type",
+    objects that have `encode_fn` and `decode_fn` can be used with
+    `.encode/.decode`.
 
     '''
-    src_type: Type
-    wire_type: WireT
 
-    def encode(obj: Type) -> WireT:
-        ...
+    def __init__(
+        self,
+        wire_type: Type,
+        decode_fn: str,
+        encode_fn: str = 'encode',
+    ):
+        self._encode_fn: str = encode_fn
+        self._decode_fn: str = decode_fn
+        self._wire_type: Type = wire_type
 
-    def decode(
-        obj_type: Type[WireT],
-        obj: WireT,
-    ) -> Type:
-        ...
+    def __repr__(self) -> str:
+        return (
+            f'{type(self).__name__}('
+            f'{self._encode_fn}, '
+            f'{self._decode_fn}) '
+            f'-> {self._wire_type}'
+        )
+
+    @property
+    def encode_fn(self) -> str:
+        return self._encode_fn
+
+    @property
+    def decode_fn(self) -> str:
+        return self._decode_fn
+
+    @property
+    def wire_type(self) -> str:
+        return self._wire_type
+
+    def is_type_compat(self, obj: any) -> bool:
+        return (
+            hasattr(obj, self._encode_fn)
+            and
+            hasattr(obj, self._decode_fn)
+        )
+
+    def encode(self, obj: any) -> any:
+        return getattr(obj, self._encode_fn)()
+
+    def decode(self, cls: Type, raw: any) -> any:
+        return getattr(cls, self._decode_fn)(raw)
 
 
-class MsgpackTypeCodec(TypeCodec):
-    ...
+'''
+Default codec descriptions for wire types:
+
+    - bytes
+    - str
+    - int
+
+'''
 
 
-def mk_codec_hooks(
-    type_codecs: list[TypeCodec],
+BytesCodec = TypeCodec(
+    decode_fn='from_bytes',
+    wire_type=bytes
+)
 
-) -> tuple[Callable, Callable]:
+
+StrCodec = TypeCodec(
+    decode_fn='from_str',
+    wire_type=str
+)
+
+
+IntCodec = TypeCodec(
+    decode_fn='from_int',
+    wire_type=int
+)
+
+
+default_codecs: dict[Type, TypeCodec] = {
+    bytes: BytesCodec,
+    str: StrCodec,
+    int: IntCodec
+}
+
+
+def mk_spec_set(
+    spec: TypeSpec
+) -> set[Type]:
     '''
-    Deliver a `enc_hook()`/`dec_hook()` pair which handle
-    manual convertion from an input `Type` set such that whenever
-    the `TypeCodec.filter()` predicate matches the
-    `TypeCodec.decode()` is called on the input native object by
-    the `dec_hook()` and whenever the
-    `isiinstance(obj, TypeCodec.type)` matches against an
-    `enc_hook(obj=obj)` the return value is taken from a
-    `TypeCodec.encode(obj)` callback.
+    Given any of the different spec definitions, always return a `set[Type]`
+    with each spec type as an item.
+
+    - When passed list|tuple|set do nothing
+    - When passed a single type we wrap it in tuple
+    - When passed a Union we wrap its inner types in tuple
 
     '''
-    ...
+    if not (
+        isinstance(spec, set)
+        or
+        isinstance(spec, list)
+        or
+        isinstance(spec, tuple)
+    ):
+        spec_info = msgspec.inspect.type_info(spec)
+        match spec_info:
+            case UnionType():
+                return set((
+                    t.cls
+                    for t in spec_info.types
+                ))
+
+            case _:
+                return set((spec, ))
+
+    return set(spec)
+
+
+def mk_codec_map_from_spec(
+    spec: TypeSpec,
+    codecs: dict[Type, TypeCodec] = default_codecs
+) -> dict[Type, TypeCodec]:
+    '''
+    Generate a map of spec type -> supported codec
+
+    '''
+    spec: set[Type] = mk_spec_set(spec)
+
+    spec_codecs: dict[Type, TypeCodec] = {}
+    for t in spec:
+        if t in spec_codecs:
+            continue
+
+        for codec_type in (int, bytes, str):
+            codec = codecs[codec_type]
+            if codec.is_type_compat(t):
+                spec_codecs[t] = codec
+                break
+
+    return spec_codecs
+
+
+def mk_enc_hook(
+    spec: TypeSpec,
+    with_builtins: bool = True,
+    builtins: set[Type] = default_builtins,
+    codecs: dict[Type, TypeCodec] = default_codecs
+) -> Callable:
+    '''
+    Given a type specification return a msgspec enc_hook fn
+
+    '''
+    spec_codecs = mk_codec_map_from_spec(spec)
+
+    def enc_hook(obj: any) -> any:
+        try:
+            t = type(obj)
+            maybe_codec = spec_codecs.get(t, None)
+            if maybe_codec:
+                return maybe_codec.encode(obj)
+
+            # passthrough builtins
+            if builtins and t in builtins:
+                return obj
+
+            raise NotImplementedError(
+                f"Objects of type {type(obj)} are not supported:\n{obj}"
+            )
+
+        except* Exception as e:
+            e.add_note(f'enc_hook: {t}, {type(obj)} {obj}')
+            raise
+
+    return enc_hook
+
+
+def mk_dec_hook(
+    spec: TypeSpec,
+    with_builtins: bool = True,
+    builtins: set[Type] = default_builtins,
+    codecs: dict[Type, TypeCodec] = default_codecs
+) -> Callable:
+    '''
+    Given a type specification return a msgspec dec_hook fn
+
+    '''
+    spec_codecs = mk_codec_map_from_spec(spec)
+
+    def dec_hook(t: Type, obj: any) -> any:
+        try:
+            if t is type(obj):
+                return obj
+
+            maybe_codec = spec_codecs.get(t, None)
+            if maybe_codec:
+                return maybe_codec.decode(t, obj)
+
+            # passthrough builtins
+            if builtins and type(obj) in builtins:
+                return obj
+
+            raise NotImplementedError(
+                f"Objects of type {type} are not supported from {obj}"
+            )
+
+        except* Exception as e:
+            e.add_note(f'dec_hook: {t}, {type(obj)} {obj}')
+            raise
+
+    return dec_hook
+
+
+def mk_codec_hooks(*args, **kwargs) -> tuple[Callable, Callable]:
+    '''
+    Given a type specification return a msgspec enc & dec hook fn pair
+
+    '''
+    return (
+        mk_enc_hook(*args, **kwargs),
+
+        mk_dec_hook(*args, **kwargs)
+    )
+
+
+def mk_codec_from_spec(
+    spec: TypeSpec,
+    with_builtins: bool = True,
+    builtins: set[Type] = default_builtins,
+    codecs: dict[Type, TypeCodec] = default_codecs
+) -> MsgCodec:
+    '''
+    Given a type specification return a MsgCodec
+
+    '''
+    spec: set[Type] = mk_spec_set(spec)
+
+    return mk_codec(
+        enc_hook=mk_enc_hook(
+            spec,
+            with_builtins=with_builtins,
+            builtins=builtins,
+            codecs=codecs
+        ),
+        ext_types=spec
+    )
+
+
+def mk_msgpack_codec(
+    spec: TypeSpec,
+    with_builtins: bool = True,
+    builtins: set[Type] = default_builtins,
+    codecs: dict[Type, TypeCodec] = default_codecs
+) -> tuple[msgpack.Encoder, msgpack.Decoder]:
+    '''
+    Get a msgpack Encoder, Decoder pair for a given type spec
+
+    '''
+    enc_hook, dec_hook = mk_codec_hooks(
+        spec,
+        with_builtins=with_builtins,
+        builtins=builtins,
+        codecs=codecs
+    )
+    encoder = msgpack.Encoder(enc_hook=enc_hook)
+    decoder = msgpack.Decoder(spec, dec_hook=dec_hook)
+    return encoder, decoder

tractor/msg/_ops.py

@@ -608,7 +608,7 @@ async def drain_to_final_msg(
             #
             # -[ ] make sure pause points work here for REPLing
             #   the runtime itself; i.e. ensure there's no hangs!
-            # |_from tractor.devx.debug import pause
+            # |_from tractor.devx._debug import pause
             #   await pause()
 
         # NOTE: we get here if the far end was

tractor/msg/pretty_struct.py

@@ -20,7 +20,6 @@ Prettified version of `msgspec.Struct` for easier console grokin.
 '''
 from __future__ import annotations
 from collections import UserList
-import textwrap
 from typing import (
     Any,
     Iterator,
@@ -106,11 +105,27 @@ def iter_fields(struct: Struct) -> Iterator[
         )
 
 
-def iter_struct_ppfmt_lines(
+def pformat(
     struct: Struct,
-    field_indent: int = 0,
-) -> Iterator[tuple[str, str]]:
+    field_indent: int = 2,
+    indent: int = 0,
 
+) -> str:
+    '''
+    Recursion-safe `pprint.pformat()` style formatting of
+    a `msgspec.Struct` for sane reading by a human using a REPL.
+
+    '''
+    # global whitespace indent
+    ws: str = ' '*indent
+
+    # field whitespace indent
+    field_ws: str = ' '*(field_indent + indent)
+
+    # qtn: str = ws + struct.__class__.__qualname__
+    qtn: str = struct.__class__.__qualname__
+
+    obj_str: str = ''  # accumulator
     fi: structs.FieldInfo
     k: str
     v: Any
@@ -120,18 +135,15 @@ def iter_struct_ppfmt_lines(
         # ..]` over .__name__ == `Literal` but still get only the
         # latter for simple types like `str | int | None` etc..?
         ft: type = fi.type
-        typ_name: str = getattr(
-            ft,
-            '__name__',
-            str(ft)
-        ).replace(' ', '')
+        typ_name: str = getattr(ft, '__name__', str(ft))
 
         # recurse to get sub-struct's `.pformat()` output Bo
         if isinstance(v, Struct):
-            yield from iter_struct_ppfmt_lines(
-                struct=v,
-                field_indent=field_indent+field_indent,
+            val_str: str =  v.pformat(
+                indent=field_indent + indent,
+                field_indent=indent + field_indent,
             )
+
         else:
             val_str: str = repr(v)
 
@@ -149,39 +161,8 @@ def iter_struct_ppfmt_lines(
                 # raise
                 # return _Struct.__repr__(struct)
 
-        yield (
-            ' '*field_indent,  # indented ws prefix
-            f'{k}: {typ_name} = {val_str},',  # field's repr line content
-        )
-
-
-def pformat(
-    struct: Struct,
-    field_indent: int = 2,
-    indent: int = 0,
-) -> str:
-    '''
-    Recursion-safe `pprint.pformat()` style formatting of
-    a `msgspec.Struct` for sane reading by a human using a REPL.
-
-    '''
-    obj_str: str = ''  # accumulator
-    for prefix, field_repr, in iter_struct_ppfmt_lines(
-        struct,
-        field_indent=field_indent,
-    ):
-        obj_str += f'{prefix}{field_repr}\n'
-
-    # global whitespace indent
-    ws: str = ' '*indent
-    if indent:
-        obj_str: str = textwrap.indent(
-            text=obj_str,
-            prefix=ws,
-        )
-
-    # qtn: str = ws + struct.__class__.__qualname__
-    qtn: str = struct.__class__.__qualname__
+        # TODO: LOLOL use `textwrap.indent()` instead dawwwwwg!
+        obj_str += (field_ws + f'{k}: {typ_name} = {val_str},\n')
 
     return (
         f'{qtn}(\n'

tractor/msg/types.py

@@ -170,7 +170,6 @@ class SpawnSpec(
     # a hard `Struct` def for all of these fields!
     _parent_main_data: dict
     _runtime_vars: dict[str, Any]
-    # ^NOTE see `._state._runtime_vars: dict`
 
     # module import capability
     enable_modules: dict[str, str]

tractor/to_asyncio.py

@@ -49,7 +49,7 @@ from tractor._state import (
     _runtime_vars,
 )
 from tractor._context import Unresolved
-from tractor.devx import debug
+from tractor.devx import _debug
 from tractor.log import (
     get_logger,
     StackLevelAdapter,
@@ -479,12 +479,12 @@ def _run_asyncio_task(
     if (
         debug_mode()
         and
-        (greenback := debug.maybe_import_greenback(
+        (greenback := _debug.maybe_import_greenback(
             force_reload=True,
             raise_not_found=False,
         ))
     ):
-        log.devx(
+        log.info(
             f'Bestowing `greenback` portal for `asyncio`-task\n'
             f'{task}\n'
         )
@@ -841,7 +841,7 @@ async def translate_aio_errors(
     except BaseException as _trio_err:
         trio_err = chan._trio_err = _trio_err
         # await tractor.pause(shield=True)  # workx!
-        entered: bool = await debug._maybe_enter_pm(
+        entered: bool = await _debug._maybe_enter_pm(
             trio_err,
             api_frame=inspect.currentframe(),
         )
@@ -1406,7 +1406,7 @@ def run_as_asyncio_guest(
             )
             # XXX make it obvi we know this isn't supported yet!
             assert 0
-            # await debug.maybe_init_greenback(
+            # await _debug.maybe_init_greenback(
             #     force_reload=True,
             # )
 

tractor/trionics/__init__.py

@@ -31,5 +31,9 @@ from ._broadcast import (
 )
 from ._beg import (
     collapse_eg as collapse_eg,
-    maybe_collapse_eg as maybe_collapse_eg,
+)
+
+from ._ordering import (
+    order_send_channel as order_send_channel,
+    order_receive_channel as order_receive_channel
 )

tractor/trionics/_ordering.py

@@ -0,0 +1,108 @@
+# tractor: structured concurrent "actors".
+# Copyright 2018-eternity Tyler Goodlet.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+'''
+Helpers to guarantee ordering of messages through a unordered channel
+
+'''
+from __future__ import annotations
+from heapq import (
+    heappush,
+    heappop
+)
+
+import trio
+import msgspec
+
+
+class OrderedPayload(msgspec.Struct, frozen=True):
+    index: int
+    payload: bytes
+
+    @classmethod
+    def from_msg(cls, msg: bytes) -> OrderedPayload:
+        return msgspec.msgpack.decode(msg, type=OrderedPayload)
+
+    def encode(self) -> bytes:
+        return msgspec.msgpack.encode(self)
+
+
+def order_send_channel(
+    channel: trio.abc.SendChannel[bytes],
+    start_index: int = 0
+):
+
+    next_index = start_index
+    send_lock = trio.StrictFIFOLock()
+
+    channel._send = channel.send
+    channel._aclose = channel.aclose
+
+    async def send(msg: bytes):
+        nonlocal next_index
+        async with send_lock:
+            await channel._send(
+                OrderedPayload(
+                    index=next_index,
+                    payload=msg
+                ).encode()
+            )
+            next_index += 1
+
+    async def aclose():
+        async with send_lock:
+            await channel._aclose()
+
+    channel.send = send
+    channel.aclose = aclose
+
+
+def order_receive_channel(
+    channel: trio.abc.ReceiveChannel[bytes],
+    start_index: int = 0
+):
+    next_index = start_index
+    pqueue = []
+
+    channel._receive = channel.receive
+
+    def can_pop_next() -> bool:
+        return (
+            len(pqueue) > 0
+            and
+            pqueue[0][0] == next_index
+        )
+
+    async def drain_to_heap():
+        while not can_pop_next():
+            msg = await channel._receive()
+            msg = OrderedPayload.from_msg(msg)
+            heappush(pqueue, (msg.index, msg.payload))
+
+    def pop_next():
+        nonlocal next_index
+        _, msg = heappop(pqueue)
+        next_index += 1
+        return msg
+
+    async def receive() -> bytes:
+        if can_pop_next():
+            return pop_next()
+
+        await drain_to_heap()
+
+        return pop_next()
+
+    channel.receive = receive

uv.lock

@@ -1,23 +1,32 @@
 version = 1
-revision = 2
+revision = 1
 requires-python = ">=3.11"
 
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