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20 Commits

Author SHA1 Message Date
Steve Dower f2b7556ef8 bpo-38092: Reduce overhead when using multiprocessing in a Windows virtual environment (GH-16098) 
https://bugs.python.org/issue38092
 2019-09-13 09:40:19 -07:00
Thomas Moreau c09a9f56c0 bpo-36888: Add multiprocessing.parent_process() (GH-13247) 2019-05-20 21:37:05 +02:00
Pierre Glaser f22cc69b01 bpo-36867: Make semaphore_tracker track other system resources (GH-13222) 
The multiprocessing.resource_tracker replaces the multiprocessing.semaphore_tracker module. Other than semaphores, resource_tracker also tracks shared_memory segments. Patch by Pierre Glaser.
 2019-05-10 22:59:08 +02:00
Steve Dower a8474d025c
bpo-35872 and bpo-35873: Clears __PYVENV_LAUNCHER__ variable (GH-11745) 
After reading __PYVENV_LAUNCHER__ we now set sys._base_executable value for later use.
Make the same changes for macOS to avoid extra platform checks.
 2019-02-03 23:19:38 -08:00
Steve Dower 4e02f8f8b4
bpo-35797: Fix default executable used by the multiprocessing module (GH-11676) 2019-01-25 14:59:12 -08:00
Victor Stinner 0aab8660cd
bpo-33929: Fix regression in spawn_main() (#7962) 
OpenProcess() creates a new handle that must be closed later.
 2018-06-27 15:18:39 +02:00
Victor Stinner 2cc9d21fff
bpo-33929: multiprocessing: fix handle leak on race condition (GH-7921) 
Fix a race condition in Popen of
multiprocessing.popen_spawn_win32. The child process now duplicates
the read end of pipe instead of "stealing" it.

Previously, the read end of pipe was "stolen" by the child process,
but it leaked a handle if the child process had been terminated
before it could steal the handle from the parent process.
 2018-06-27 11:40:24 +02:00
Allen W. Smith, Ph.D bd73e72b4a bpo-5001: More-informative multiprocessing error messages (#3079) 
* 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.
 2017-08-30 00:52:18 +02:00
Antoine Pitrou ebb39bcc04 Issue #28779: multiprocessing.set_forkserver_preload() would crash the forkserver process if a preloaded module instantiated some multiprocessing objects such as locks. 2016-12-10 17:16:17 +01:00
Antoine Pitrou cd2a201e5b Issue #28779: multiprocessing.set_forkserver_preload() would crash the forkserver process if a preloaded module instantiated some multiprocessing objects such as locks. 2016-12-10 17:13:16 +01:00
Davin Potts 5458647bb8 Issue #28053: Applying refactorings, docs and other cleanup to follow. 2016-09-09 18:03:10 -05:00
Berker Peksag 16fb674882 Fix typo in docstring of multiprocessing.spawn.spawn_main() 2016-01-07 19:02:55 +02:00
Richard Oudkerk 99d8dd2489 Issue #20990: Correction for 619331c67638. 2014-03-23 18:44:11 +00:00
Richard Oudkerk a40675a1a2 Issue #20990: Fix issues found by pyflakes for multiprocessing. 2014-03-23 11:54:15 +00:00
Nick Coghlan 9a76735b1d Close #19946: use runpy as needed in multiprocessing 
- handles main files without a suffix
- handles main submodules properly
- adds test cases for the various kinds of __main__
 2013-12-17 22:17:26 +10:00
Brett Cannon ca7ab7c7f1 Issue #19946: Raise ImportError when the main module cannot be found 
by multiprocessing.spawn (before it was raising an AttributeError).
 2013-12-13 11:43:10 -05:00
Eric Snow b523f8433a Implement PEP 451 (ModuleSpec). 2013-11-22 09:05:39 -07:00
Richard Oudkerk b1694cf588 Issue #18999: Make multiprocessing use context objects. 
This allows different parts of a program to use different methods for
starting processes without interfering with each other.
 2013-10-16 16:41:56 +01:00
Richard Oudkerk 7d2d43c0b1 Stop making fork server have copy of semaphore_tracker_fd. 2013-08-22 11:38:57 +01:00
Richard Oudkerk 84ed9a68bd Issue #8713: Support alternative start methods in multiprocessing on Unix. 
See http://hg.python.org/sandbox/sbt#spawn
 2013-08-14 15:35:41 +01:00