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705ea2a9c3
- EngAcquireSemaphoreShared: update dwEngAcquireCount - DC_LockDc/DC_UnlockDc: Acquire PDEV lock only for direct DCs, in that case also update the pSurface pointer - When copying DC states, copy the surface only for memory dcs - after switching the mode, update system metrics and redraw the desktop window. - Remove testdraw code. svn path=/branches/reactos-yarotows/; revision=46658
173 lines
3.4 KiB
C
173 lines
3.4 KiB
C
#include <w32k.h>
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#define NDEBUG
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#include <debug.h>
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/*
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* @implemented
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*/
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HSEMAPHORE
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APIENTRY
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EngCreateSemaphore ( VOID )
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{
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// www.osr.com/ddk/graphics/gdifncs_95lz.htm
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PERESOURCE psem = ExAllocatePoolWithTag( NonPagedPool, sizeof(ERESOURCE), TAG_GSEM );
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if ( !psem )
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return NULL;
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if ( !NT_SUCCESS(ExInitializeResourceLite ( psem )) )
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{
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ExFreePoolWithTag ( psem, TAG_GSEM );
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return NULL;
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}
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return (HSEMAPHORE)psem;
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}
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VOID
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FASTCALL
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IntGdiAcquireSemaphore ( HSEMAPHORE hsem )
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{
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KeEnterCriticalRegion();
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ExAcquireResourceExclusiveLite ( (PERESOURCE)hsem, TRUE );
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}
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/*
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* @implemented
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*/
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VOID
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APIENTRY
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EngAcquireSemaphore ( IN HSEMAPHORE hsem )
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{
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// www.osr.com/ddk/graphics/gdifncs_14br.htm
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PTHREADINFO W32Thread;
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ASSERT(hsem);
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IntGdiAcquireSemaphore ( hsem );
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W32Thread = PsGetThreadWin32Thread(PsGetCurrentThread());
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if (W32Thread) W32Thread->dwEngAcquireCount++;
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}
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VOID
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FASTCALL
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IntGdiReleaseSemaphore ( HSEMAPHORE hsem )
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{
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ExReleaseResourceLite ( (PERESOURCE)hsem );
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KeLeaveCriticalRegion();
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}
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/*
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* @implemented
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*/
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VOID
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APIENTRY
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EngReleaseSemaphore ( IN HSEMAPHORE hsem )
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{
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// www.osr.com/ddk/graphics/gdifncs_5u3r.htm
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PTHREADINFO W32Thread;
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ASSERT(hsem);
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W32Thread = PsGetThreadWin32Thread(PsGetCurrentThread());
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if (W32Thread) --W32Thread->dwEngAcquireCount;
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IntGdiReleaseSemaphore ( hsem );
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}
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VOID
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NTAPI
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EngAcquireSemaphoreShared(
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IN HSEMAPHORE hsem)
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{
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PTHREADINFO pti;
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ASSERT(hsem);
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ExEnterCriticalRegionAndAcquireResourceShared((PERESOURCE)hsem);
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pti = PsGetThreadWin32Thread(PsGetCurrentThread());
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if (pti) ++pti->dwEngAcquireCount;
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}
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/*
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* @implemented
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*/
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VOID
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APIENTRY
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EngDeleteSemaphore ( IN HSEMAPHORE hsem )
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{
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// www.osr.com/ddk/graphics/gdifncs_13c7.htm
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ASSERT ( hsem );
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ExDeleteResourceLite((PERESOURCE)hsem);
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ExFreePoolWithTag( (PVOID)hsem, TAG_GSEM);
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}
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/*
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* @implemented
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*/
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BOOL
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APIENTRY
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EngIsSemaphoreOwned ( IN HSEMAPHORE hsem )
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{
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// www.osr.com/ddk/graphics/gdifncs_6wmf.htm
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ASSERT(hsem);
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return (((PERESOURCE)hsem)->ActiveCount > 0);
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}
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/*
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* @implemented
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*/
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BOOL
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APIENTRY
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EngIsSemaphoreOwnedByCurrentThread ( IN HSEMAPHORE hsem )
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{
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// www.osr.com/ddk/graphics/gdifncs_9yxz.htm
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ASSERT(hsem);
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return ExIsResourceAcquiredExclusiveLite ( (PERESOURCE)hsem );
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}
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/*
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* @implemented
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*/
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BOOL APIENTRY
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EngInitializeSafeSemaphore(
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OUT ENGSAFESEMAPHORE *Semaphore)
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{
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HSEMAPHORE hSem;
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if (InterlockedIncrement(&Semaphore->lCount) == 1)
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{
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/* Create the semaphore */
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hSem = EngCreateSemaphore();
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if (hSem == 0)
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{
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InterlockedDecrement(&Semaphore->lCount);
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return FALSE;
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}
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/* FIXME - not thread-safe! Check result of InterlockedCompareExchangePointer
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and delete semaphore if already initialized! */
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(void)InterlockedExchangePointer((volatile PVOID *)&Semaphore->hsem, hSem);
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}
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else
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{
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/* Wait for the other thread to create the semaphore */
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ASSERT(Semaphore->lCount > 1);
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ASSERT_IRQL_LESS_OR_EQUAL(PASSIVE_LEVEL);
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while (Semaphore->hsem == NULL);
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}
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return TRUE;
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}
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/*
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* @implemented
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*/
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VOID APIENTRY
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EngDeleteSafeSemaphore(
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IN OUT ENGSAFESEMAPHORE *Semaphore)
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{
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if (InterlockedDecrement(&Semaphore->lCount) == 0)
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{
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/* FIXME - not thread-safe! Use result of InterlockedCompareExchangePointer! */
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EngDeleteSemaphore(Semaphore->hsem);
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(void)InterlockedExchangePointer((volatile PVOID *)&Semaphore->hsem, NULL);
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}
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}
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