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[NTUSER] Lock before getting DesktopDC. Fixes crash during loading DirectX CORE-7733

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svn path=/trunk/; revision=74142
This commit is contained in:
Sebastian Gasiorek 2017-03-10 16:33:45 +00:00
parent 29bf877001
commit c6af963e8d
1 changed files with 4 additions and 0 deletions
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4
reactos/win32ss/user/ntuser/desktop.c
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@ -932,6 +932,8 @@ UserGetDesktopDC(ULONG DcType, BOOL EmptyDC, BOOL ValidatehWnd)
PWND DesktopObject = 0;
HDC DesktopHDC = 0;
UserEnterExclusive();
if (DcType == DC_TYPE_DIRECT)
{
DesktopObject = UserGetDesktopWindow();
@ -943,6 +945,8 @@ UserGetDesktopDC(ULONG DcType, BOOL EmptyDC, BOOL ValidatehWnd)
DesktopHDC = IntGdiCreateDisplayDC(pMonitor->hDev, DcType, EmptyDC);
}
UserLeave();
return DesktopHDC;
}