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Diffstat (limited to 'Doc')
| -rw-r--r-- | Doc/library/multiprocessing.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Doc/library/multiprocessing.rst b/Doc/library/multiprocessing.rst index bdc07f1..320e492 100644 --- a/Doc/library/multiprocessing.rst +++ b/Doc/library/multiprocessing.rst @@ -928,6 +928,12 @@ object -- see :ref:`multiprocessing-managers`. .. note:: + The :meth:`acquire` and :meth:`wait` methods of each of these types + treat negative timeouts as zero timeouts. This differs from + :mod:`threading` where, since version 3.2, the equivalent + :meth:`acquire` methods treat negative timeouts as infinite + timeouts. + On Mac OS X, ``sem_timedwait`` is unsupported, so calling ``acquire()`` with a timeout will emulate that function's behavior using a sleeping loop. @@ -1899,6 +1905,7 @@ multiple connections at the same time. those objects in *object_list* which are ready. If *timeout* is a float then the call blocks for at most that many seconds. If *timeout* is ``None`` then it will block for an unlimited period. + A negative timeout is equivalent to a zero timeout. For both Unix and Windows, an object can appear in *object_list* if it is |