Don't require runtime (for now), type annot fixing

tractor/_shm.py

@@ -29,7 +29,7 @@ from typing import Optional
 from multiprocessing.shared_memory import (
     SharedMemory,
     ShareableList,
-    _USE_POSIX,
+    _USE_POSIX,  # type: ignore
 )
 
 if _USE_POSIX:
@@ -46,15 +46,6 @@ from .log import get_logger
 log = get_logger(__name__)
 
 
-# how  much is probably dependent on lifestyle
-_secs_in_day = int(60 * 60 * 24)
-# we try for a buncha times, but only on a run-every-other-day kinda week.
-_days_worth = 16
-_default_size = _days_worth * _secs_in_day
-# where to start the new data append index
-_rt_buffer_start = int((_days_worth - 1) * _secs_in_day)
-
-
 def disable_mantracker():
     '''
     Disable all ``multiprocessing``` "resource tracking" machinery since
@@ -79,7 +70,6 @@ def disable_mantracker():
     mantracker._resource_tracker = ManTracker()
     mantracker.register = mantracker._resource_tracker.register
     mantracker.ensure_running = mantracker._resource_tracker.ensure_running
-    # ensure_running = mantracker._resource_tracker.ensure_running
     mantracker.unregister = mantracker._resource_tracker.unregister
     mantracker.getfd = mantracker._resource_tracker.getfd
 
@@ -134,9 +124,14 @@ class _NpToken(Struct, frozen=True):
     dtype_descr: tuple
     size: int  # in struct-array index / row terms
 
+    # TODO: use nptyping here on dtypes
     @property
-    def dtype(self) -> np.dtype:
-        return np.dtype(list(map(tuple, self.dtype_descr))).descr
+    def dtype(self) -> list[tuple[str, str, tuple[int, ...]]]:
+        return np.dtype(
+            list(
+                map(tuple, self.dtype_descr)
+            )
+        ).descr
 
     def as_msg(self):
         return self.to_dict()
@@ -161,10 +156,10 @@ class _NpToken(Struct, frozen=True):
 # _known_tokens = trio.RunVar('shms', {})
 
 # process-local store of keys to tokens
-_known_tokens = {}
+_known_tokens: dict[str, _NpToken] = {}
 
 
-def get_shm_token(key: str) -> _NpToken | str:
+def get_shm_token(key: str) -> _NpToken | None:
     '''
     Convenience func to check if a token
     for the provided key is known by this process.
@@ -228,11 +223,10 @@ class ShmArray:
         self._post_init: bool = False
 
         # pushing data does not write the index (aka primary key)
+        self._write_fields: list[str] | None = None
         dtype = shmarr.dtype
         if dtype.fields:
             self._write_fields = list(shmarr.dtype.fields.keys())[1:]
-        else:
-            self._write_fields = None
 
     # TODO: ringbuf api?
 
@@ -283,9 +277,9 @@ class ShmArray:
         self,
         fields: Optional[list[str]] = None,
 
-        # type that all field values will be cast to
-        # in the returned view.
-        common_dtype: np.dtype = np.float,
+        # type that all field values will be cast to in the returned
+        # view.
+        common_dtype: np.dtype = np.float64,  # type: ignore
 
     ) -> np.ndarray:
 
@@ -543,7 +537,6 @@ def open_shm_ndarray(
 
     # "unlink" created shm on process teardown by
     # pushing teardown calls onto actor context stack
-
     stack = tractor.current_actor().lifetime_stack
     stack.callback(shmarr.close)
     stack.callback(shmarr.destroy)
@@ -769,14 +762,19 @@ def open_shm_list(
     )
 
     # "close" attached shm on actor teardown
-    tractor.current_actor().lifetime_stack.callback(shml.shm.close)
-    tractor.current_actor().lifetime_stack.callback(shml.shm.unlink)
+    try:
+        actor = tractor.current_actor()
+        actor.lifetime_stack.callback(shml.shm.close)
+        actor.lifetime_stack.callback(shml.shm.unlink)
+    except RuntimeError:
+        log.warning('tractor runtime not active, skipping teardown steps')
 
     return shml
 
 
 def attach_shm_list(
     key: str,
+
 ) -> ShmList:
 
     return ShmList(name=key)