You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
70 lines
2.2 KiB
70 lines
2.2 KiB
1 year ago
|
# util/concurrency.py
|
||
|
|
# Copyright (C) 2005-2023 the SQLAlchemy authors and contributors
|
||
|
|
# <see AUTHORS file>
|
||
|
|
#
|
||
|
|
# This module is part of SQLAlchemy and is released under
|
||
|
|
# the MIT License: https://www.opensource.org/licenses/mit-license.php
|
||
|
|
# mypy: allow-untyped-defs, allow-untyped-calls
|
||
|
|
|
||
|
|
from __future__ import annotations
|
||
|
|
|
||
|
|
import asyncio # noqa
|
||
|
|
import typing
|
||
|
|
|
||
|
|
have_greenlet = False
|
||
|
|
greenlet_error = None
|
||
|
|
try:
|
||
|
|
import greenlet # type: ignore # noqa: F401
|
||
|
|
except ImportError as e:
|
||
|
|
greenlet_error = str(e)
|
||
|
|
pass
|
||
|
|
else:
|
||
|
|
have_greenlet = True
|
||
|
|
from ._concurrency_py3k import await_only as await_only
|
||
|
|
from ._concurrency_py3k import await_fallback as await_fallback
|
||
|
|
from ._concurrency_py3k import greenlet_spawn as greenlet_spawn
|
||
|
|
from ._concurrency_py3k import is_exit_exception as is_exit_exception
|
||
|
|
from ._concurrency_py3k import AsyncAdaptedLock as AsyncAdaptedLock
|
||
|
|
from ._concurrency_py3k import (
|
||
|
|
_util_async_run as _util_async_run,
|
||
|
|
) # noqa: F401
|
||
|
|
from ._concurrency_py3k import (
|
||
|
|
_util_async_run_coroutine_function as _util_async_run_coroutine_function, # noqa: F401, E501
|
||
|
|
)
|
||
|
|
|
||
|
|
if not typing.TYPE_CHECKING and not have_greenlet:
|
||
|
|
|
||
|
|
def _not_implemented():
|
||
|
|
# this conditional is to prevent pylance from considering
|
||
|
|
# greenlet_spawn() etc as "no return" and dimming out code below it
|
||
|
|
if have_greenlet:
|
||
|
|
return None
|
||
|
|
|
||
|
|
raise ValueError(
|
||
|
|
"the greenlet library is required to use this function."
|
||
|
|
" %s" % greenlet_error
|
||
|
|
if greenlet_error
|
||
|
|
else ""
|
||
|
|
)
|
||
|
|
|
||
|
|
def is_exit_exception(e): # noqa: F811
|
||
|
|
return not isinstance(e, Exception)
|
||
|
|
|
||
|
|
def await_only(thing): # type: ignore # noqa: F811
|
||
|
|
_not_implemented()
|
||
|
|
|
||
|
|
def await_fallback(thing): # type: ignore # noqa: F811
|
||
|
|
return thing
|
||
|
|
|
||
|
|
def greenlet_spawn(fn, *args, **kw): # type: ignore # noqa: F811
|
||
|
|
_not_implemented()
|
||
|
|
|
||
|
|
def AsyncAdaptedLock(*args, **kw): # type: ignore # noqa: F811
|
||
|
|
_not_implemented()
|
||
|
|
|
||
|
|
def _util_async_run(fn, *arg, **kw): # type: ignore # noqa: F811
|
||
|
|
return fn(*arg, **kw)
|
||
|
|
|
||
|
|
def _util_async_run_coroutine_function(fn, *arg, **kw): # type: ignore # noqa: F811,E501
|
||
|
|
_not_implemented()
|