diff options
Diffstat (limited to 'venv/lib/python3.11/site-packages/anyio/to_thread.py')
-rw-r--r-- | venv/lib/python3.11/site-packages/anyio/to_thread.py | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/venv/lib/python3.11/site-packages/anyio/to_thread.py b/venv/lib/python3.11/site-packages/anyio/to_thread.py new file mode 100644 index 0000000..5070516 --- /dev/null +++ b/venv/lib/python3.11/site-packages/anyio/to_thread.py @@ -0,0 +1,69 @@ +from __future__ import annotations + +import sys +from collections.abc import Callable +from typing import TypeVar +from warnings import warn + +from ._core._eventloop import get_async_backend +from .abc import CapacityLimiter + +if sys.version_info >= (3, 11): + from typing import TypeVarTuple, Unpack +else: + from typing_extensions import TypeVarTuple, Unpack + +T_Retval = TypeVar("T_Retval") +PosArgsT = TypeVarTuple("PosArgsT") + + +async def run_sync( + func: Callable[[Unpack[PosArgsT]], T_Retval], + *args: Unpack[PosArgsT], + abandon_on_cancel: bool = False, + cancellable: bool | None = None, + limiter: CapacityLimiter | None = None, +) -> T_Retval: + """ + Call the given function with the given arguments in a worker thread. + + If the ``cancellable`` option is enabled and the task waiting for its completion is + cancelled, the thread will still run its course but its return value (or any raised + exception) will be ignored. + + :param func: a callable + :param args: positional arguments for the callable + :param abandon_on_cancel: ``True`` to abandon the thread (leaving it to run + unchecked on own) if the host task is cancelled, ``False`` to ignore + cancellations in the host task until the operation has completed in the worker + thread + :param cancellable: deprecated alias of ``abandon_on_cancel``; will override + ``abandon_on_cancel`` if both parameters are passed + :param limiter: capacity limiter to use to limit the total amount of threads running + (if omitted, the default limiter is used) + :return: an awaitable that yields the return value of the function. + + """ + if cancellable is not None: + abandon_on_cancel = cancellable + warn( + "The `cancellable=` keyword argument to `anyio.to_thread.run_sync` is " + "deprecated since AnyIO 4.1.0; use `abandon_on_cancel=` instead", + DeprecationWarning, + stacklevel=2, + ) + + return await get_async_backend().run_sync_in_worker_thread( + func, args, abandon_on_cancel=abandon_on_cancel, limiter=limiter + ) + + +def current_default_thread_limiter() -> CapacityLimiter: + """ + Return the capacity limiter that is used by default to limit the number of + concurrent threads. + + :return: a capacity limiter object + + """ + return get_async_backend().current_default_thread_limiter() |