[Bug 22624] New: multithread app using GDI and directx may cause deadlock
wine-bugs at winehq.org
wine-bugs at winehq.org
Sat May 8 01:08:40 CDT 2010
http://bugs.winehq.org/show_bug.cgi?id=22624
Summary: multithread app using GDI and directx may cause
deadlock
Product: Wine
Version: 1.1.44
Platform: x86
OS/Version: Linux
Status: UNCONFIRMED
Severity: major
Priority: P2
Component: directx-d3d
AssignedTo: wine-bugs at winehq.org
ReportedBy: drangon.mail at gmail.com
multithread app using GDI and directx may cause deadlock
suppose thread A calling StretchDIBits() while thread B calling
DirectDrawCreateEx().
In thread A, StrentchDIBits() will first call GDI_GetObjPtr() in which enter
critical section "gdi_section", then call the X11DRV function in which enter
critical section "X11DRV_CritSection".
In thread B, DirectDrawCreateEx() will call test_pbo_functionality(), in this
function, first call ENTER_GL() which enter critical section
"X11DRV_CritSection",
then call wglFinish() ( actuall function is X11DRV_wglFinish() ), then call
ExtEscape(), then call get_dc_ptr(), in which enter critical section
"gdi_section".
Then this two thread may hold one critical section and wait for another, then
cause deadlock.
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