[Patches] [ python-Patches-500447 ] native win32 threading primitives

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Patches item #500447, was opened at 2002-01-07 08:34
You can respond by visiting: 
http://sourceforge.net/tracker/?func=detail&atid=305470&aid=500447&group_id=5470

Category: Modules
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Jason Orendorff (jorend)
Assigned to: Nobody/Anonymous (nobody)
Summary: native win32 threading primitives

Initial Comment:
The "threading" module provides five synchronization
primitives: Lock, RLock, Condition, Semaphore, and
Event.

This patch is a module, "winthreading", that provides
native C implementations (using Win32 directly) of
these objects.  Benchmark code runs several times
to several hundred times faster using winthreading.

winthreading.c is intended as a drop-in replacement
for these five pieces of threading.py:

  # At the end of threading.py; replace
  # Python synch primitives with native version,
  # if available.
  try:
      from winthreading import *
  except ImportError:
      pass


The ZIP file attached includes source and MSVC6
project files.  The source is compatible with
Python 2.2.

A prebuilt .PYD will follow.

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>Comment By: Jason Orendorff (jorend)
Date: 2002-01-07 22:49

Message:
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Better source distribution attached.

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Comment By: Jason Orendorff (jorend)
Date: 2002-01-07 09:20

Message:
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Test cases attached.

To run them, put winthreading.pyd in your PYTHONPATH
and run (for example)

 python test_rlock.py

Each test takes a few seconds to a minute to run
on my box; there's a lot of mysterious output,
followed by:

  threading: [2.5829999446868896, ...]
  average: 2.62159998417
  winthreading: [0.12999999523162842, ...]
  average: 0.122199988365
  performance gain: 95.339%
  winthreading is 21.5 times faster!

If you are brave, try modifying test_condition_2.py
a bit.  Change access.wait() to access.wait(50000)
on lines 25 and 39; and see what happens.  (If you
are not quite that brave, you might want to adjust
nloops, on line 46, down to about 500.)


----------------------------------------------------------------------

Comment By: Jason Orendorff (jorend)
Date: 2002-01-07 08:37

Message:
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user_id=18139

Prebuilt .PYD file, as promised.

----------------------------------------------------------------------

You can respond by visiting: 
http://sourceforge.net/tracker/?func=detail&atid=305470&aid=500447&group_id=5470