[pywin32-bugs] [ pywin32-Bugs-1842445 ] win32api.RegQueryValueEx cannot obtain perfomance data

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Bugs item #1842445, was opened at 2007-12-02 00:01
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Vano (native_api)
Assigned to: Nobody/Anonymous (nobody)
Summary: win32api.RegQueryValueEx cannot obtain perfomance data

Initial Comment:
"Performance data" is HKEY_PERFORMANCE_DATA or HKLM\Software\Microsoft\Windows NT\CurrentVersion\Perflib values.

The problem is caused by a special behaviour of the underlying API in this case. The call at win32apimodule.cpp:3575 doesn't return size to bufSize but simply fails with ERROR_MORE_DATA (and so does the whole function).

Attached is the diff that adds handling of this special situation. It assumes that this is the only case where RegQueryValueEx emits ERROR_MORE_DATA given NULL as lpData.

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You can respond by visiting: 
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