Commit Graph

26 Commits

Author SHA1 Message Date
Andrew Svetlov 68b34a7204 bpo-36921: Deprecate @coroutine for sake of async def (GH-13346)
The second attempt. Now deprecate `@coroutine` only, keep `yield from fut` as is.


https://bugs.python.org/issue36921
2019-05-16 07:52:10 -07:00
Yury Selivanov 9012a0fb4c
bpo-34728: Fix asyncio tests to run under "-Werror" (GH-9661) 2018-10-02 13:53:06 -04:00
Brett Cannon 8425de4147
bpo-33562: Check the global asyncio event loop policy isn't set after any tests (GH-7328) 2018-06-01 20:34:09 -07:00
Elvis Pranskevichus e2b340ab41 bpo-32751: Wait for task cancellation in asyncio.wait_for() (GH-7216)
Currently, asyncio.wait_for(fut), upon reaching the timeout deadline,
cancels the future and returns immediately.  This is problematic for
when *fut* is a Task, because it will be left running for an arbitrary
amount of time.  This behavior is iself surprising and may lead to
related bugs such as the one described in bpo-33638:

    condition = asyncio.Condition()
    async with condition:
        await asyncio.wait_for(condition.wait(), timeout=0.5)

Currently, instead of raising a TimeoutError, the above code will fail
with `RuntimeError: cannot wait on un-acquired lock`, because
`__aexit__` is reached _before_ `condition.wait()` finishes its
cancellation and re-acquires the condition lock.

To resolve this, make `wait_for` await for the task cancellation.
The tradeoff here is that the `timeout` promise may be broken if the
task decides to handle its cancellation in a slow way.  This represents
a behavior change and should probably not be back-patched to 3.6 and
earlier.
2018-05-29 17:31:01 -04:00
Bar Harel 5746510b7a bpo-32841: Fix cancellation in awaiting asyncio.Condition (#5665) 2018-02-14 11:18:11 +02:00
Bar Harel 2f79c01493 bpo-32734: Fix asyncio.Lock multiple acquire safety issue (GH-5466) 2018-02-02 17:04:00 -05:00
Yury Selivanov 3e9751819a
bpo-32273: Move asyncio.test_utils to test.test_asyncio (#4785) 2017-12-11 10:04:40 -05:00
Yury Selivanov 6370f345e1
bpo-32262: Fix codestyle; use f-strings formatting where necessary. (#4775) 2017-12-10 18:36:12 -05:00
Andrew Svetlov 28d8d14013
bpo-32253: Deprecate with statement and bare await for asyncio locks (GH-4764)
* Add test for 'with (yield from lock)'
* Deprecate with statement for asyncio locks
* Document the deprecation
2017-12-09 20:00:05 +02:00
Andrew Svetlov 5f841b5538
bpo-32193: Convert asyncio to async/await usage (#4753)
* Convert asyncio/tasks.py to async/await

* Convert asyncio/queues.py to async/await

* Convert asyncio/test_utils.py to async/await

* Convert asyncio/base_subprocess.py to async/await

* Convert asyncio/subprocess.py to async/await

* Convert asyncio/streams.py to async/await

* Fix comments

* Convert asyncio/locks.py to async/await

* Convert asyncio.sleep to async def

* Add a comment

* Add missing news

* Convert stubs from AbstrctEventLoop to async functions

* Convert subprocess_shell/subprocess_exec

* Convert connect_read_pipe/connect_write_pip to async/await syntax

* Convert create_datagram_endpoint

* Convert create_unix_server/create_unix_connection

* Get rid of old style coroutines in unix_events.py

* Convert selector_events.py to async/await

* Convert wait_closed and create_connection

* Drop redundant line

* Convert base_events.py

* Code cleanup

* Drop redundant comments

* Fix indentation

* Add explicit tests for compatibility between old and new coroutines

* Convert windows event loop to use async/await

* Fix double awaiting of async function

* Convert asyncio/locks.py

* Improve docstring

* Convert tests to async/await

* Convert more tests

* Convert more tests

* Convert more tests

* Convert tests

* Improve test
2017-12-09 00:23:48 +02:00
Mathieu Sornay 894a654a9c Fix waiter cancellation in asyncio.Lock (#1031)
Avoid a deadlock when the waiter who is about to take the lock is
cancelled

Issue #27585
2017-06-09 16:17:40 -04:00
Yury Selivanov 600a349781 Issue #28613: Fix get_event_loop() to return the current loop
when called from coroutines or callbacks.
2016-11-04 14:29:28 -04:00
Martin Panter 0be894b2f6 Issue #27895: Spelling fixes (Contributed by Ville Skyttä). 2016-09-07 12:03:06 +00:00
Yury Selivanov c92bf83a82 Issue #22970: asyncio: Fix inconsistency cancelling Condition.wait.
Patch by David Coles.
2016-06-11 12:00:07 -04:00
Guido van Rossum d455a50773 Also rewrote the guts of asyncio.Semaphore (patch by manipopopo). 2015-09-29 11:54:45 -07:00
Victor Stinner 313a980904 asyncio: sync with Tulip
* _WaitHandleFuture.cancel() now notify IocpProactor through the overlapped
  object that the wait was cancelled.
* Optimize IocpProactor.wait_for_handle() gets the result if the wait is
  signaled immediatly.
* Enhance representation of Future and Future subclasses

  - Add "created at filename:lineno" in the representation
  - Add Future._repr_info() method which can be more easily overriden than
    Future.__repr__(). It should now be more easy to enhance Future
    representation without having to modify each subclass. For example,
    _OverlappedFuture and _WaitHandleFuture get the new "created at" information.
  - Use reprlib to format Future result, and function arguments when formatting a
    callback, to limit the length of the representation.

* Fix repr(_WaitHandleFuture)
* _WaitHandleFuture and _OverlappedFuture: hide frames of internal calls in the
  source traceback.
* Cleanup ProactorIocp._poll(): set the timeout to 0 after the first call to
  GetQueuedCompletionStatus()
* test_locks: close the temporary event loop and check the condition lock
* Remove workaround in test_futures, no more needed
2014-07-29 12:58:23 +02:00
Andrew Svetlov f21fcd09c5 Accept optional lock object in Condition ctor (tulip issue #198) 2014-07-26 17:54:34 +03:00
Victor Stinner 87f16f892c Issue #21163, asyncio: Fix some "Task was destroyed but it is pending!" logs in tests 2014-06-25 23:11:21 +02:00
Victor Stinner c73701de72 asyncio: Refactor tests: add a base TestCase class 2014-06-18 01:36:32 +02:00
Victor Stinner 24ba203504 asyncio: Replace "unittest.mock" with "mock" in unit tests
Use "from unittest import mock". It should simplify my work to merge new tests
in Trollius, because Trollius uses "mock" backport for Python 2.
2014-02-26 10:25:02 +01:00
Guido van Rossum ab3c88983b asyncio: Locks refactor: use a separate context manager; remove Semaphore._locked. 2014-01-25 16:51:57 -08:00
Victor Stinner 8dffc456d7 Update asyncio from the Tulip project
Major changes:

- StreamReader.readexactly() now raises an IncompleteReadError if the
  end of stream is reached before we received enough bytes, instead of
  returning less bytes than requested.

- Unit tests use the main asyncio module instead of submodules like events

- _UnixWritePipeTransport now also supports character devices, as
  _UnixReadPipeTransport. Patch written by Jonathan Slenders.

- Export more symbols: BaseEventLoop, BaseProactorEventLoop,
  BaseSelectorEventLoop, Queue and Queue sublasses, Empty, Full
2014-01-25 15:32:06 +01:00
Guido van Rossum 085869bfee asyncio: Change bounded semaphore into a subclass, like threading.[Bounded]Semaphore. 2013-11-23 15:09:16 -08:00
Guido van Rossum 9c55a58a1d asyncio: Make Semaphore(0) work properly. 2013-11-21 11:07:45 -08:00
Guido van Rossum ccea08462b asyncio: Locks improvements by Arnaud Faure: better repr(), change Conditio\
n structure.
2013-11-04 13:18:19 -08:00
Guido van Rossum 27b7c7ebf1 Initial checkin of asyncio package (== Tulip, == PEP 3156). 2013-10-17 13:40:50 -07:00