robust at shutdown. If needs to release multiple resources, they are released
even if errors are occured.

Patch by Davin Potts.

primitives.

This allows different parts of a program to use different methods for
starting processes without interfering with each other.

See http://hg.python.org/sandbox/sbt#spawn

Issue #16284: Prevent keeping unnecessary references to worker functions in concurrent.futures ThreadPoolExecutor.

instead of BSD licence.

Also, add a multiprocessing.connection.wait(rlist, timeout=None) function
for polling multiple objects at once.  Patch by sbt.

Complete changelist from sbt's patch:

* Adds a wait(rlist, timeout=None) function for polling multiple
  objects at once.  On Unix this is just a wrapper for
  select(rlist, [], [], timeout=None).

* Removes use of the SentinelReady exception and the sentinels argument
  to certain methods.  concurrent.futures.process has been changed to
  use wait() instead of SentinelReady.

* Fixes bugs concerning PipeConnection.poll() and messages of zero
  length.

* Fixes PipeListener.accept() to call ConnectNamedPipe() with
  overlapped=True.

* Fixes Queue.empty() and SimpleQueue.empty() so that they are
  threadsafe on Windows.

* Now PipeConnection.poll() and wait() will not modify the pipe except
  possibly by consuming a zero length message.  (Previously poll()
  could consume a partial message.)

* All of multiprocesing's pipe related blocking functions/methods are
  now interruptible by SIGINT on Windows.

when called with a timeout.  Patch by Arnaud Ysmal.

when called with a timeout.  Patch by Arnaud Ysmal.

This bug doesn't seem to exist on 3.2, where daemon threads are killed
before Py_Finalize() is entered.

(followup to dfaa3a149a92)

children and raises BrokenProcessPool in such a situation.  Previously it
would reliably freeze/deadlock.

svn+ssh://pythondev@svn.python.org/python/branches/py3k

........
  r87225 | r.david.murray | 2010-12-13 20:38:16 -0500 (Mon, 13 Dec 2010) | 2 lines

  9162: fix license in multiprocessing files
........

svn+ssh://pythondev@svn.python.org/python/branches/py3k

........
  r87225 | r.david.murray | 2010-12-13 20:38:16 -0500 (Mon, 13 Dec 2010) | 2 lines

  9162: fix license in multiprocessing files
........

issue5738: The distribution example was confusing, and out of date. It's too large to include inline in the docs as well. It belongs in an addons module outside the stdlib. Removing.

Merged revisions 73206,73232,73299,73683,74020,74185,74544,74643,74647,74817,74838-74839,74865,74946,75402,75459,75604,75696 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

........
  r73206 | georg.brandl | 2009-06-04 11:15:12 +0200 (Do, 04 Jun 2009) | 1 line

  #3584: ignore trailing newlines when placing the caret for a SyntaxError location.
........
  r73232 | georg.brandl | 2009-06-04 20:59:58 +0200 (Do, 04 Jun 2009) | 1 line

  Add test for #3684.
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  r73299 | georg.brandl | 2009-06-08 20:41:36 +0200 (Mo, 08 Jun 2009) | 1 line

  Typo fix.
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  r73683 | georg.brandl | 2009-06-29 16:44:49 +0200 (Mo, 29 Jun 2009) | 1 line

  Fix error handling in PyCode_Optimize, by Alexander Schremmer at EuroPython sprint.
........
  r74020 | georg.brandl | 2009-07-16 09:18:07 +0200 (Do, 16 Jul 2009) | 1 line

  #5910: fix kqueue for calls with more than one event.
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  r74185 | georg.brandl | 2009-07-23 11:17:09 +0200 (Do, 23 Jul 2009) | 1 line

  Fix the "pylocals" gdb command.
........
  r74544 | georg.brandl | 2009-08-24 19:12:30 +0200 (Mo, 24 Aug 2009) | 1 line

  #6775: fix python.org URLs in README.
........
  r74643 | georg.brandl | 2009-09-04 08:59:20 +0200 (Fr, 04 Sep 2009) | 2 lines

  Issue #2666: Handle BROWSER environment variable properly for unknown browser names in the webbrowser module.
........
  r74647 | georg.brandl | 2009-09-04 10:17:04 +0200 (Fr, 04 Sep 2009) | 2 lines

  Issue #5275: In Cookie's Cookie.load(), properly handle non-string arguments as documented.
........
  r74817 | georg.brandl | 2009-09-16 11:05:11 +0200 (Mi, 16 Sep 2009) | 1 line

  Make deprecation notices as visible as warnings are right now.
........
  r74838 | georg.brandl | 2009-09-16 18:22:12 +0200 (Mi, 16 Sep 2009) | 1 line

  Remove some more boilerplate from the actual tests in test_pdb.
........
  r74839 | georg.brandl | 2009-09-16 18:36:39 +0200 (Mi, 16 Sep 2009) | 1 line

  Make the pdb displayhook compatible with the standard displayhook: do not print Nones. Add a test for that.
........
  r74865 | georg.brandl | 2009-09-17 09:49:37 +0200 (Do, 17 Sep 2009) | 1 line

  #6912: add "with" block support to pindent.
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  r74946 | georg.brandl | 2009-09-19 10:43:16 +0200 (Sa, 19 Sep 2009) | 1 line

  Update bug tracker reference.
........
  r75402 | georg.brandl | 2009-10-14 17:51:48 +0200 (Mi, 14 Okt 2009) | 1 line

  #7125: fix typo.
........
  r75459 | georg.brandl | 2009-10-17 10:57:43 +0200 (Sa, 17 Okt 2009) | 1 line

  Fix refleaks in _ctypes PyCSimpleType_New, which fixes the refleak seen in test___all__.
........
  r75604 | georg.brandl | 2009-10-22 13:36:50 +0200 (Do, 22 Okt 2009) | 1 line

  Fix stylesheet for multi-paragraph impl-details.
........
  r75696 | georg.brandl | 2009-10-25 21:25:43 +0100 (So, 25 Okt 2009) | 1 line

  Fix a demo.
........

svn+ssh://pythondev@svn.python.org/python/branches/py3k

................
  r74745 | benjamin.peterson | 2009-09-11 17:24:02 -0500 (Fri, 11 Sep 2009) | 98 lines

  Merged revisions 74277,74321,74323,74326,74355,74465,74467,74488,74492,74513,74531,74549,74553,74625,74632,74643-74644,74647,74652,74666,74671,74727,74739 via svnmerge from
  svn+ssh://pythondev@svn.python.org/python/trunk

  ........
    r74277 | sean.reifschneider | 2009-08-01 18:54:55 -0500 (Sat, 01 Aug 2009) | 3 lines

    - Issue #6624: yArg_ParseTuple with "s" format when parsing argument with
      NUL: Bogus TypeError detail string.
  ........
    r74321 | guilherme.polo | 2009-08-05 11:51:41 -0500 (Wed, 05 Aug 2009) | 1 line

    Easier reference to find (at least while svn continues being used).
  ........
    r74323 | guilherme.polo | 2009-08-05 18:48:26 -0500 (Wed, 05 Aug 2009) | 1 line

    Typo.
  ........
    r74326 | jesse.noller | 2009-08-05 21:05:56 -0500 (Wed, 05 Aug 2009) | 1 line

    Fix issue 4660: spurious task_done errors in multiprocessing, remove doc note for from_address
  ........
    r74355 | gregory.p.smith | 2009-08-12 12:02:37 -0500 (Wed, 12 Aug 2009) | 2 lines

    comment typo fix
  ........
    r74465 | vinay.sajip | 2009-08-15 18:23:12 -0500 (Sat, 15 Aug 2009) | 1 line

    Added section on logging to one file from multiple processes.
  ........
    r74467 | vinay.sajip | 2009-08-15 18:34:47 -0500 (Sat, 15 Aug 2009) | 1 line

    Refined section on logging to one file from multiple processes.
  ........
    r74488 | vinay.sajip | 2009-08-17 08:14:37 -0500 (Mon, 17 Aug 2009) | 1 line

    Further refined section on logging to one file from multiple processes.
  ........
    r74492 | r.david.murray | 2009-08-17 14:26:49 -0500 (Mon, 17 Aug 2009) | 2 lines

    Issue 6685: 'toupper' -> 'upper' in cgi doc example explanation.
  ........
    r74513 | skip.montanaro | 2009-08-18 09:37:52 -0500 (Tue, 18 Aug 2009) | 1 line

    missing module ref (issue6723)
  ........
    r74531 | vinay.sajip | 2009-08-20 17:04:32 -0500 (Thu, 20 Aug 2009) | 1 line

    Added section on exceptions raised during logging.
  ........
    r74549 | benjamin.peterson | 2009-08-24 12:42:36 -0500 (Mon, 24 Aug 2009) | 1 line

    fix pdf building by teaching latex the right encoding package
  ........
    r74553 | r.david.murray | 2009-08-26 20:04:59 -0500 (Wed, 26 Aug 2009) | 2 lines

    Remove leftover text from end of sentence.
  ........
    r74625 | benjamin.peterson | 2009-09-01 17:27:57 -0500 (Tue, 01 Sep 2009) | 1 line

    remove the check that classmethod's argument is a callable
  ........
    r74632 | georg.brandl | 2009-09-03 02:27:26 -0500 (Thu, 03 Sep 2009) | 1 line

    #6828: fix wrongly highlighted blocks.
  ........
    r74643 | georg.brandl | 2009-09-04 01:59:20 -0500 (Fri, 04 Sep 2009) | 2 lines

    Issue #2666: Handle BROWSER environment variable properly for unknown browser names in the webbrowser module.
  ........
    r74644 | georg.brandl | 2009-09-04 02:55:14 -0500 (Fri, 04 Sep 2009) | 1 line

    #5047: remove Monterey support from configure.
  ........
    r74647 | georg.brandl | 2009-09-04 03:17:04 -0500 (Fri, 04 Sep 2009) | 2 lines

    Issue #5275: In Cookie's Cookie.load(), properly handle non-string arguments as documented.
  ........
    r74652 | georg.brandl | 2009-09-04 06:25:37 -0500 (Fri, 04 Sep 2009) | 1 line

    #6756: add some info about the "acct" parameter.
  ........
    r74666 | georg.brandl | 2009-09-05 04:04:09 -0500 (Sat, 05 Sep 2009) | 1 line

    #6841: remove duplicated word.
  ........
    r74671 | georg.brandl | 2009-09-05 11:47:17 -0500 (Sat, 05 Sep 2009) | 1 line

    #6843: add link from filterwarnings to where the meaning of the arguments is covered.
  ........
    r74727 | benjamin.peterson | 2009-09-08 18:04:22 -0500 (Tue, 08 Sep 2009) | 1 line

    #6865 fix ref counting in initialization of pwd module
  ........
    r74739 | georg.brandl | 2009-09-11 02:55:20 -0500 (Fri, 11 Sep 2009) | 1 line

    Move function back to its section.
  ........
................

Merged revisions 74277,74321,74323,74326,74355,74465,74467,74488,74492,74513,74531,74549,74553,74625,74632,74643-74644,74647,74652,74666,74671,74727,74739 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

........
  r74277 | sean.reifschneider | 2009-08-01 18:54:55 -0500 (Sat, 01 Aug 2009) | 3 lines

  - Issue #6624: yArg_ParseTuple with "s" format when parsing argument with
    NUL: Bogus TypeError detail string.
........
  r74321 | guilherme.polo | 2009-08-05 11:51:41 -0500 (Wed, 05 Aug 2009) | 1 line

  Easier reference to find (at least while svn continues being used).
........
  r74323 | guilherme.polo | 2009-08-05 18:48:26 -0500 (Wed, 05 Aug 2009) | 1 line

  Typo.
........
  r74326 | jesse.noller | 2009-08-05 21:05:56 -0500 (Wed, 05 Aug 2009) | 1 line

  Fix issue 4660: spurious task_done errors in multiprocessing, remove doc note for from_address
........
  r74355 | gregory.p.smith | 2009-08-12 12:02:37 -0500 (Wed, 12 Aug 2009) | 2 lines

  comment typo fix
........
  r74465 | vinay.sajip | 2009-08-15 18:23:12 -0500 (Sat, 15 Aug 2009) | 1 line

  Added section on logging to one file from multiple processes.
........
  r74467 | vinay.sajip | 2009-08-15 18:34:47 -0500 (Sat, 15 Aug 2009) | 1 line

  Refined section on logging to one file from multiple processes.
........
  r74488 | vinay.sajip | 2009-08-17 08:14:37 -0500 (Mon, 17 Aug 2009) | 1 line

  Further refined section on logging to one file from multiple processes.
........
  r74492 | r.david.murray | 2009-08-17 14:26:49 -0500 (Mon, 17 Aug 2009) | 2 lines

  Issue 6685: 'toupper' -> 'upper' in cgi doc example explanation.
........
  r74513 | skip.montanaro | 2009-08-18 09:37:52 -0500 (Tue, 18 Aug 2009) | 1 line

  missing module ref (issue6723)
........
  r74531 | vinay.sajip | 2009-08-20 17:04:32 -0500 (Thu, 20 Aug 2009) | 1 line

  Added section on exceptions raised during logging.
........
  r74549 | benjamin.peterson | 2009-08-24 12:42:36 -0500 (Mon, 24 Aug 2009) | 1 line

  fix pdf building by teaching latex the right encoding package
........
  r74553 | r.david.murray | 2009-08-26 20:04:59 -0500 (Wed, 26 Aug 2009) | 2 lines

  Remove leftover text from end of sentence.
........
  r74625 | benjamin.peterson | 2009-09-01 17:27:57 -0500 (Tue, 01 Sep 2009) | 1 line

  remove the check that classmethod's argument is a callable
........
  r74632 | georg.brandl | 2009-09-03 02:27:26 -0500 (Thu, 03 Sep 2009) | 1 line

  #6828: fix wrongly highlighted blocks.
........
  r74643 | georg.brandl | 2009-09-04 01:59:20 -0500 (Fri, 04 Sep 2009) | 2 lines

  Issue #2666: Handle BROWSER environment variable properly for unknown browser names in the webbrowser module.
........
  r74644 | georg.brandl | 2009-09-04 02:55:14 -0500 (Fri, 04 Sep 2009) | 1 line

  #5047: remove Monterey support from configure.
........
  r74647 | georg.brandl | 2009-09-04 03:17:04 -0500 (Fri, 04 Sep 2009) | 2 lines

  Issue #5275: In Cookie's Cookie.load(), properly handle non-string arguments as documented.
........
  r74652 | georg.brandl | 2009-09-04 06:25:37 -0500 (Fri, 04 Sep 2009) | 1 line

  #6756: add some info about the "acct" parameter.
........
  r74666 | georg.brandl | 2009-09-05 04:04:09 -0500 (Sat, 05 Sep 2009) | 1 line

  #6841: remove duplicated word.
........
  r74671 | georg.brandl | 2009-09-05 11:47:17 -0500 (Sat, 05 Sep 2009) | 1 line

  #6843: add link from filterwarnings to where the meaning of the arguments is covered.
........
  r74727 | benjamin.peterson | 2009-09-08 18:04:22 -0500 (Tue, 08 Sep 2009) | 1 line

  #6865 fix ref counting in initialization of pwd module
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  r74739 | georg.brandl | 2009-09-11 02:55:20 -0500 (Fri, 11 Sep 2009) | 1 line

  Move function back to its section.
........

Merged revisions 73196,73278-73280,73299,73308,73312-73313,73317-73318,73321,73324,73331,73335,73340,73363 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

........
  r73196 | benjamin.peterson | 2009-06-03 20:40:29 -0500 (Wed, 03 Jun 2009) | 1 line

  use the offical api
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  r73278 | benjamin.peterson | 2009-06-07 17:33:11 -0500 (Sun, 07 Jun 2009) | 1 line

  inherit from object
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  r73279 | benjamin.peterson | 2009-06-07 17:35:00 -0500 (Sun, 07 Jun 2009) | 1 line

  always inherit from an appropiate base class
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  r73280 | benjamin.peterson | 2009-06-07 17:54:35 -0500 (Sun, 07 Jun 2009) | 1 line

  use booleans for flags
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  r73299 | georg.brandl | 2009-06-08 13:41:36 -0500 (Mon, 08 Jun 2009) | 1 line

  Typo fix.
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  r73308 | benjamin.peterson | 2009-06-08 17:18:32 -0500 (Mon, 08 Jun 2009) | 1 line

  remove useless assertion
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  r73312 | benjamin.peterson | 2009-06-08 18:44:13 -0500 (Mon, 08 Jun 2009) | 1 line

  remove error checks already done in set_context()
........
  r73313 | r.david.murray | 2009-06-08 19:44:22 -0500 (Mon, 08 Jun 2009) | 4 lines

  Issue 2947: document how return code handling translates from
  os.popen to subprocess.  Also fixes reference link in the
  os.spawn documentation.
........
  r73317 | benjamin.peterson | 2009-06-09 12:24:26 -0500 (Tue, 09 Jun 2009) | 1 line

  make ast.c depend on the grammar
........
  r73318 | benjamin.peterson | 2009-06-09 12:29:51 -0500 (Tue, 09 Jun 2009) | 1 line

  explain why keyword names are not just NAME
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  r73321 | benjamin.peterson | 2009-06-09 16:13:43 -0500 (Tue, 09 Jun 2009) | 1 line

  update symbol.py from with statement changes
........
  r73324 | amaury.forgeotdarc | 2009-06-09 17:53:16 -0500 (Tue, 09 Jun 2009) | 2 lines

  Avoid invoking the parser/compiler just to test the presence of a function.
........
  r73331 | benjamin.peterson | 2009-06-10 08:45:31 -0500 (Wed, 10 Jun 2009) | 1 line

  fix spelling
........
  r73335 | raymond.hettinger | 2009-06-10 11:15:40 -0500 (Wed, 10 Jun 2009) | 1 line

  Fix signed/unsigned compiler warning.
........
  r73340 | amaury.forgeotdarc | 2009-06-10 15:30:19 -0500 (Wed, 10 Jun 2009) | 2 lines

  Fix a typo spotted by Nick Coghlan.
........
  r73363 | benjamin.peterson | 2009-06-11 12:51:17 -0500 (Thu, 11 Jun 2009) | 1 line

  use multi-with syntax
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svn+ssh://pythondev@svn.python.org/python/trunk

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  r65824 | benjamin.peterson | 2008-08-18 13:01:43 -0500 (Mon, 18 Aug 2008) | 1 line

  change a few uses of the threading APIs
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svn+ssh://pythondev@svn.python.org/python/trunk

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  r64125 | benjamin.peterson | 2008-06-11 12:27:50 -0500 (Wed, 11 Jun 2008) | 2 lines

  give the threading API PEP 8 names
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svn+ssh://pythondev@svn.python.org/python/trunk

........
  r64104 | benjamin.peterson | 2008-06-10 21:40:25 -0500 (Tue, 10 Jun 2008) | 2 lines

  add the multiprocessing package to fulfill PEP 371
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  r64117 | benjamin.peterson | 2008-06-11 07:26:31 -0500 (Wed, 11 Jun 2008) | 2 lines

  fix import of multiprocessing by juggling imports
........