[issue3027] if extended c module is calling Windows API waitForSingleObject, it will block other thread.

[patrick]

New submission from patrick <[EMAIL PROTECTED]>:

The c extend module is as the attached file "WindowsFuncs.cpp", it 
wraps some Windows event APIs

The python script is as the attached file "test.py", run that script, 
we could find in the new thread, the calling to Windows API 
waitForSingleObject will block the main thread printing, that's really 
strange. 

The output of running is as the attached file "test.output".

--
components: Interpreter Core
files: attach.zip
messages: 67633
nosy: patrick
severity: normal
status: open
title: if extended c module is calling Windows API waitForSingleObject, it will 
block other thread.
versions: Python 2.5
Added file: http://bugs.python.org/file10502/attach.zip

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[issue3027] if extended c module is calling Windows API waitForSingleObject, it will block other thread.

[Thomas Herve]

Thomas Herve <[EMAIL PROTECTED]> added the comment:

You have to release the GIL. See http://docs.python.org/api/threads.html
for some information.

--
nosy: +therve

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[issue3027] if extended c module is calling Windows API waitForSingleObject, it will block other thread.

[patrick]

patrick <[EMAIL PROTECTED]> added the comment:

Yes, after wrapping the calling to block operation with marco 
Py_BEGIN_ALLOW_THREADS and Py_END_ALLOW_THREADS, that issue is gone. 
Thank you.

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[issue3027] if extended c module is calling Windows API waitForSingleObject, it will block other thread.

[Georg Brandl]

Changes by Georg Brandl <[EMAIL PROTECTED]>:


--
resolution:  -> works for me
status: open -> closed

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