[Bug 29262] New: Creating windows in threads may deadlock

http://bugs.winehq.org/show_bug.cgi?id=29262

Bug #: 29262
           Summary: Creating windows in threads may deadlock
           Product: Wine
           Version: 1.3.34
          Platform: x86
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: -unknown
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]
    Classification: Unclassified

Created attachment 37846
  --> http://bugs.winehq.org/attachment.cgi?id=37846
testcase (source + binary - w32)

Creating windows in threads may deadlock at gdi_section and X11DRV_CritSection.
This doesn't seem to happen on win xp. Though I'd expect that it should be
possible to create windows from a thread. Attached is a small test case.

Howto:
- run graphics.exe
- hit the button "start" a couple of times and the deadlock may appear
(sometimes it takes ages to trigger it, sometimes the first hit will make it
happen)

Log:
err:ntdll:RtlpWaitForCriticalSection section 0x688ef580
"../../../git/dlls/winex11.drv/x11drv_main.c: X11DRV_CritSection" wait timed
out in thread 0009, blocked by 002f, retrying (60 sec)
err:ntdll:RtlpWaitForCriticalSection section 0x68e2d960
"../../../git/dlls/gdi32/gdiobj.c: gdi_section" wait timed out in thread 002f,
blocked by 0009, retrying (60 sec)