Support asyncio actors with the trio spawner backend

prehardkill
Tyler Goodlet 2020-07-27 11:03:17 -04:00
parent da16149cad
commit 94927948a9
3 changed files with 23 additions and 3 deletions

View File

@ -19,12 +19,15 @@ def parse_ipaddr(arg):
return (str(host), int(port))
from ._entry import _trio_main
if __name__ == "__main__":
parser = argparse.ArgumentParser()
parser.add_argument("--uid", type=parse_uid)
parser.add_argument("--loglevel", type=str)
parser.add_argument("--parent_addr", type=parse_ipaddr)
parser.add_argument("--asyncio", action='store_true')
args = parser.parse_args()
subactor = Actor(
@ -36,5 +39,6 @@ if __name__ == "__main__":
_trio_main(
subactor,
parent_addr=args.parent_addr
parent_addr=args.parent_addr,
infect_asyncio=args.asyncio,
)

View File

@ -20,6 +20,7 @@ def _mp_main(
forkserver_info: Tuple[Any, Any, Any, Any, Any],
start_method: str,
parent_addr: Tuple[str, int] = None,
infect_asyncio: bool = False,
) -> None:
"""The routine called *after fork* which invokes a fresh ``trio.run``
"""
@ -61,12 +62,15 @@ def _trio_main(
actor: 'Actor', # type: ignore # noqa
*,
parent_addr: Tuple[str, int] = None,
infect_asyncio: bool = False,
) -> None:
"""Entry point for a `trio_run_in_process` subactor.
"""
log.info(f"Started new trio process for {actor.uid}")
log.info(f"Started new trio process for {actor.uid}")
if actor.loglevel is not None:
log.info(
f"Setting loglevel for {actor.uid} to {actor.loglevel}")
@ -84,7 +88,11 @@ def _trio_main(
)
try:
trio.run(trio_main)
if infect_asyncio:
actor._infected_aio = True
run_as_asyncio_guest(trio_main)
else:
trio.run(trio_main)
except KeyboardInterrupt:
log.warning(f"Actor {actor.uid} received KBI")

View File

@ -159,6 +159,7 @@ async def cancel_on_completion(
async def spawn_subactor(
subactor: 'Actor',
parent_addr: Tuple[str, int],
infect_asyncio: bool,
):
spawn_cmd = [
sys.executable,
@ -183,6 +184,10 @@ async def spawn_subactor(
subactor.loglevel
]
# Tell child to run in guest mode on top of ``asyncio`` loop
if infect_asyncio:
spawn_cmd.append("--asyncio")
proc = await trio.open_process(spawn_cmd)
try:
yield proc
@ -240,6 +245,7 @@ async def new_proc(
parent_addr: Tuple[str, int],
_runtime_vars: Dict[str, Any], # serialized and sent to _child
*,
infect_asyncio: bool = False,
task_status: TaskStatus[Portal] = trio.TASK_STATUS_IGNORED
) -> None:
"""Create a new ``multiprocessing.Process`` using the
@ -255,6 +261,7 @@ async def new_proc(
async with spawn_subactor(
subactor,
parent_addr,
infect_asyncio=infect_asyncio
) as proc:
log.info(f"Started {proc}")
@ -392,6 +399,7 @@ async def mp_new_proc(
fs_info,
start_method,
parent_addr,
infect_asyncio,
),
# daemon=True,
name=name,