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* bpo-36867: Make semaphore_tracker track other system resources (GH-13222)Pierre Glaser2019-05-101-196/+0
| | | The multiprocessing.resource_tracker replaces the multiprocessing.semaphore_tracker module. Other than semaphores, resource_tracker also tracks shared_memory segments. Patch by Pierre Glaser.
* bpo-36668: FIX reuse semaphore tracker for child processes (#5172)Thomas Moreau2019-04-241-10/+26
| | | Fix the multiprocessing.semaphore_tracker so it is reused by child processes.
* bpo-33613, test_semaphore_tracker_sigint: fix race condition (#7850)Pablo Galindo2018-09-041-6/+28
| | | | | | | | | | | | Fail `test_semaphore_tracker_sigint` if no warnings are expected and one is received. Fix race condition when the child receives SIGINT before it can register signal handlers for it. The race condition occurs when the parent calls `_semaphore_tracker.ensure_running()` (which in turn spawns the semaphore_tracker using `_posixsubprocess.fork_exec`), the child registers the signal handlers and the parent tries to kill the child. What seem to happen is that in some slow systems, the parent sends the signal to kill the child before the child protects against the signal.
* bpo-31310: multiprocessing's semaphore tracker should be launched again if ↵Antoine Pitrou2017-11-031-3/+17
| | | | | | | | | | | crashed (#3247) * bpo-31310: multiprocessing's semaphore tracker should be launched again if crashed * Avoid mucking with process state in test. Add a warning if the semaphore process died, as semaphores may then be leaked. * Add NEWS entry
* bpo-5001: More-informative multiprocessing error messages (#3079)Allen W. Smith, Ph.D2017-08-291-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Make error message more informative Replace assertions in error-reporting code with more-informative version that doesn't cause confusion over where and what the error is. * Additional clarification + get travis to check * Change from SystemError to TypeError As suggested in PR comment by @pitrou, changing from SystemError; TypeError appears appropriate. * NEWS file installation; ACKS addition (will do my best to justify it by additional work) * Making current AssertionErrors in multiprocessing more informative * Blurb added re multiprocessing managers.py, queues.py cleanup * Further multiprocessing cleanup - went through pool.py * Fix two asserts in multiprocessing/util.py * Most asserts in multiprocessing more informative * Didn't save right version * Further work on multiprocessing error messages * Correct typo * Correct typo v2 * Blasted colon... serves me right for trying to work on two things at once * Simplify NEWS entry * Update 2017-08-18-17-16-38.bpo-5001.gwnthq.rst * Update 2017-08-18-17-16-38.bpo-5001.gwnthq.rst OK, never mind. * Corrected (thanks to pitrou) error messages for notify * Remove extraneous backslash in docstring.
* Issue #20976: pyflakes: Remove unused importsVictor Stinner2014-03-201-2/+0
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* Issue #18999: Make multiprocessing use context objects.Richard Oudkerk2013-10-161-51/+61
| | | | | This allows different parts of a program to use different methods for starting processes without interfering with each other.
* Issue #18571: Implementation of the PEP 446: file descriptors and file handlesVictor Stinner2013-08-271-1/+1
| | | | | are now created non-inheritable; add functions os.get/set_inheritable(), os.get/set_handle_inheritable() and socket.socket.get/set_inheritable().
* Stop making fork server have copy of semaphore_tracker_fd.Richard Oudkerk2013-08-221-7/+7
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* Issue #8713: Support alternative start methods in multiprocessing on Unix.Richard Oudkerk2013-08-141-0/+135
See http://hg.python.org/sandbox/sbt#spawn
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