[pywin32-bugs] [ pywin32-Bugs-3612206 ] Deadlock with Loader Lock and GIL

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Bugs item #3612206, was opened at 2013-04-29 08:12
Message generated for change (Tracker Item Submitted) made by sschukat
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Stefan Schukat (sschukat)
Assigned to: Nobody/Anonymous (nobody)
Summary: Deadlock with Loader Lock and GIL

Initial Comment:
FormatMessage could implicit load libraries to read resource strings for the message formatting. For this the windows DLL loader lock is acquired. In an multithreaded application which makes use of native an Python threads a deadlock could happen if these two locks (Loader Lock, GIL) are acquired in wrong order. This fix releases the GIL before a call to FormatMessage is made.

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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=551954&aid=3612206&group_id=78018