Wow, fix all the broken async func invoking code..
Clearly this wasn't developed against a task that spawned just an async func in `asyncio`.. Fix all that and remove a bunch of unnecessary func layers. Add provisional support for the target receiving the `to_trio` and `from_trio` channels and for the @tractor.stream marker.wip_fix_asyncio_gen_streaming
parent
940774f215
commit
a9985c0c01
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@ -4,7 +4,6 @@ Infection apis for ``asyncio`` loops running ``trio`` using guest mode.
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import asyncio
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import inspect
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from typing import (
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Any,
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Callable,
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AsyncGenerator,
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Awaitable,
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@ -19,46 +18,54 @@ from ._state import current_actor
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log = get_logger(__name__)
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__all__ = ['run_task']
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__all__ = ['run_task', 'run_as_asyncio_guest']
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async def _invoke(
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from_trio: trio.abc.ReceiveChannel,
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to_trio: asyncio.Queue,
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coro: Awaitable,
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) -> Union[AsyncGenerator, Awaitable]:
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"""Await or stream awaiable object based on type into
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) -> None:
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"""Await or stream awaiable object based on ``coro`` type into
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``trio`` memory channel.
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``from_trio`` might eventually be used here for bidirectional streaming.
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"""
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async def stream_from_gen(c):
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async for item in c:
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to_trio.send_nowait(item)
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async def just_return(c):
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to_trio.send_nowait(await c)
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if inspect.isasyncgen(coro):
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return await stream_from_gen(coro)
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async for item in coro:
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to_trio.send_nowait(item)
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elif inspect.iscoroutine(coro):
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return await coro
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to_trio.send_nowait(await coro)
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async def run_task(
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func: Callable,
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*,
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qsize: int = 2**10,
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_treat_as_stream: bool = False,
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**kwargs,
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) -> Any:
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) -> Union[AsyncGenerator, Awaitable]:
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"""Run an ``asyncio`` async function or generator in a task, return
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or stream the result back to ``trio``.
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"""
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assert current_actor()._infected_aio
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assert current_actor().is_infected_aio()
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# ITC (inter task comms)
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from_trio = asyncio.Queue(qsize)
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to_trio, from_aio = trio.open_memory_channel(qsize)
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# allow target func to accept/stream results manually
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args = tuple(inspect.getfullargspec(func).args)
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if getattr(func, '_tractor_steam_function', None):
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# the assumption is that the target async routine accepts the
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# send channel then it intends to yield more then one return
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# value otherwise it would just return ;P
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_treat_as_stream = True
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# allow target func to accept/stream results manually by name
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if 'to_trio' in args:
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kwargs['to_trio'] = to_trio
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if 'from_trio' in args:
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kwargs['from_trio'] = to_trio
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coro = func(**kwargs)
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@ -70,7 +77,6 @@ async def run_task(
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task = asyncio.create_task(_invoke(from_trio, to_trio, coro))
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err = None
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# XXX: I'm not sure this actually does anything...
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def cancel_trio(task):
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"""Cancel the calling ``trio`` task on error.
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"""
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@ -80,17 +86,8 @@ async def run_task(
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task.add_done_callback(cancel_trio)
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# determine return type async func vs. gen
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if inspect.isasyncgen(coro):
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# simple async func
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async def result():
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with cancel_scope:
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return await from_aio.get()
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if cancel_scope.cancelled_caught and err:
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raise err
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elif inspect.iscoroutine(coro):
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# asycn gen
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if inspect.isasyncgen(coro) or _treat_as_stream:
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async def result():
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with cancel_scope:
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async with from_aio:
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@ -101,6 +98,14 @@ async def run_task(
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return result()
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# simple async func
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elif inspect.iscoroutine(coro):
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with cancel_scope:
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result = await from_aio.receive()
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return result
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if cancel_scope.cancelled_caught and err:
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raise err
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def run_as_asyncio_guest(
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trio_main: Awaitable,
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