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Fix BSOD in IntPrepareDriver (bug 1321)

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svn path=/trunk/; revision=22126
This commit is contained in:
Hervé Poussineau 2006-05-31 14:26:56 +00:00
parent d91dbeb60b
commit b22255488e
3 changed files with 37 additions and 4 deletions
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1
reactos/subsystems/win32/win32k/include/dc.h
View file

@ -170,6 +170,7 @@ typedef struct
#define DC_UnlockDc(pDC) \
GDIOBJ_UnlockObjByPtr (GdiHandleTable, pDC)
NTSTATUS FASTCALL InitDcImpl(VOID);
HDC FASTCALL RetrieveDisplayHDC(VOID);
HDC FASTCALL DC_AllocDC(PUNICODE_STRING Driver);
VOID FASTCALL DC_InitDC(HDC DCToInit);

7
reactos/subsystems/win32/win32k/main/dllmain.c
View file

@ -500,6 +500,13 @@ DriverEntry (
return STATUS_UNSUCCESSFUL;
}
Status = InitDcImpl();
if (!NT_SUCCESS(Status))
{
DPRINT1("Failed to initialize Device context implementation!\n");
return STATUS_UNSUCCESSFUL;
}
/* Initialize FreeType library */
if (! InitFontSupport())
{

33
reactos/subsystems/win32/win32k/objects/dc.c
View file

@ -41,6 +41,17 @@ HalQueryDisplayOwnership(
#endif
static GDIDEVICE PrimarySurface;
static KEVENT VideoDriverNeedsPreparation;
static KEVENT VideoDriverPrepared;
NTSTATUS FASTCALL
InitDcImpl(VOID)
{
KeInitializeEvent(&VideoDriverNeedsPreparation, SynchronizationEvent, TRUE);
KeInitializeEvent(&VideoDriverPrepared, NotificationEvent, FALSE);
return STATUS_SUCCESS;
}
/* FIXME: DCs should probably be thread safe */
@ -489,6 +500,17 @@ IntPrepareDriver()
BOOL GotDriver;
BOOL DoDefault;
ULONG DisplayNumber;
LARGE_INTEGER Zero;
BOOLEAN ret = FALSE;
Zero.QuadPart = 0;
if (STATUS_SUCCESS != KeWaitForSingleObject(&VideoDriverNeedsPreparation, Executive, KernelMode, TRUE, &Zero))
{
/* Concurrent access. Wait for VideoDriverPrepared event */
if (STATUS_SUCCESS == KeWaitForSingleObject(&VideoDriverPrepared, Executive, KernelMode, TRUE, NULL))
ret = PrimarySurface.PreparedDriver;
goto cleanup;
}
for (DisplayNumber = 0; ; DisplayNumber++)
{
@ -502,7 +524,7 @@ IntPrepareDriver()
if (PrimarySurface.VideoFileObject == NULL)
{
DPRINT1("FindMPDriver failed\n");
return FALSE;
goto cleanup;
}
/* Retrieve DDI driver names from registry */
@ -576,7 +598,7 @@ IntPrepareDriver()
{
ObDereferenceObject(PrimarySurface.VideoFileObject);
DPRINT1("BuildDDIFunctions failed\n");
return FALSE;
goto cleanup;
}
/* Allocate a phyical device handle from the driver */
@ -659,10 +681,13 @@ IntPrepareDriver()
PrimarySurface.PreparedDriver = TRUE;
PrimarySurface.DisplayNumber = DisplayNumber;
return TRUE;
ret = TRUE;
goto cleanup;
}
return FALSE;
cleanup:
KeSetEvent(&VideoDriverPrepared, 1, FALSE);
return ret;
}
static BOOL FASTCALL