68 lines
1.9 KiB
Python
68 lines
1.9 KiB
Python
from __future__ import annotations
|
|
|
|
import functools
|
|
import sys
|
|
import typing
|
|
import warnings
|
|
|
|
import anyio.to_thread
|
|
|
|
if sys.version_info >= (3, 10): # pragma: no cover
|
|
from typing import ParamSpec
|
|
else: # pragma: no cover
|
|
from typing_extensions import ParamSpec
|
|
|
|
P = ParamSpec("P")
|
|
T = typing.TypeVar("T")
|
|
|
|
|
|
async def run_until_first_complete(*args: tuple[typing.Callable, dict]) -> None: # type: ignore[type-arg] # noqa: E501
|
|
warnings.warn(
|
|
"run_until_first_complete is deprecated "
|
|
"and will be removed in a future version.",
|
|
DeprecationWarning,
|
|
)
|
|
|
|
async with anyio.create_task_group() as task_group:
|
|
|
|
async def run(func: typing.Callable[[], typing.Coroutine]) -> None: # type: ignore[type-arg] # noqa: E501
|
|
await func()
|
|
task_group.cancel_scope.cancel()
|
|
|
|
for func, kwargs in args:
|
|
task_group.start_soon(run, functools.partial(func, **kwargs))
|
|
|
|
|
|
async def run_in_threadpool(
|
|
func: typing.Callable[P, T], *args: P.args, **kwargs: P.kwargs
|
|
) -> T:
|
|
if kwargs: # pragma: no cover
|
|
# run_sync doesn't accept 'kwargs', so bind them in here
|
|
func = functools.partial(func, **kwargs)
|
|
return await anyio.to_thread.run_sync(func, *args)
|
|
|
|
|
|
class _StopIteration(Exception):
|
|
pass
|
|
|
|
|
|
def _next(iterator: typing.Iterator[T]) -> T:
|
|
# We can't raise `StopIteration` from within the threadpool iterator
|
|
# and catch it outside that context, so we coerce them into a different
|
|
# exception type.
|
|
try:
|
|
return next(iterator)
|
|
except StopIteration:
|
|
raise _StopIteration
|
|
|
|
|
|
async def iterate_in_threadpool(
|
|
iterator: typing.Iterable[T],
|
|
) -> typing.AsyncIterator[T]:
|
|
as_iterator = iter(iterator)
|
|
while True:
|
|
try:
|
|
yield await anyio.to_thread.run_sync(_next, as_iterator)
|
|
except _StopIteration:
|
|
break
|