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[3.7] bpo-36794: Document that Lock.acquire is fair. (GH-13082) #13659

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May 29, 2019
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[3.7] bpo-36794: Document that Lock.acquire is fair. (GH-13082) #13659

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7 changes: 7 additions & 0 deletions Doc/library/asyncio-sync.rst
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Expand Up @@ -66,6 +66,13 @@ Lock
This method waits until the lock is *unlocked*, sets it to
*locked* and returns ``True``.

When more than one coroutine is blocked in :meth:`acquire`
waiting for the lock to be unlocked, only one coroutine
eventually proceeds.

Acquiring a lock is *fair*: the coroutine that proceeds will be
the first coroutine that started waiting on the lock.

.. method:: release()

Release the lock.
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