Win32k:

- Rewrite EngAcquire/ReleaseSemaphore.
- Add internal fastcalls for them and tag.
- Fix DxEngUn/LockShareSem.
- Tested with Qemu. Needs Dx testing.

svn path=/trunk/; revision=33309

reactos/subsystems/win32/win32k/eng/semaphor.c

@@ -11,7 +11,7 @@ STDCALL
 EngCreateSemaphore ( VOID )
 {
   // www.osr.com/ddk/graphics/gdifncs_95lz.htm
-  PERESOURCE psem = ExAllocatePool ( NonPagedPool, sizeof(ERESOURCE) );
+  PERESOURCE psem = ExAllocatePoolWithTag( NonPagedPool, sizeof(ERESOURCE), TAG_GSEM );
   if ( !psem )
     return NULL;
   if ( !NT_SUCCESS(ExInitializeResourceLite ( psem )) )
@@ -22,6 +22,14 @@ EngCreateSemaphore ( VOID )
   return (HSEMAPHORE)psem;
 }
 
+VOID
+FASTCALL
+IntGdiAcquireSemaphore ( HSEMAPHORE hsem )
+{
+  KeEnterCriticalRegion();
+  ExAcquireResourceExclusiveLite ( (PERESOURCE)hsem, TRUE );
+}
+
 /*
  * @implemented
  */
@@ -30,9 +38,20 @@ STDCALL
 EngAcquireSemaphore ( IN HSEMAPHORE hsem )
 {
   // www.osr.com/ddk/graphics/gdifncs_14br.htm
+  PW32THREAD W32Thread;
   ASSERT(hsem);
-  KeEnterCriticalRegion();
-  ExAcquireResourceExclusiveLite ( (PERESOURCE)hsem, TRUE );
+  IntGdiAcquireSemaphore ( hsem );
+  W32Thread = PsGetThreadWin32Thread(PsGetCurrentThread());
+  if (W32Thread) W32Thread->dwEngAcquireCount++;
+}
+
+
+VOID
+FASTCALL
+IntGdiReleaseSemaphore ( HSEMAPHORE hsem )
+{
+  ExReleaseResourceLite ( (PERESOURCE)hsem );
+  KeLeaveCriticalRegion();
 }
 
 /*
@@ -43,9 +62,11 @@ STDCALL
 EngReleaseSemaphore ( IN HSEMAPHORE hsem )
 {
   // www.osr.com/ddk/graphics/gdifncs_5u3r.htm
+  PW32THREAD W32Thread;
   ASSERT(hsem);
-  ExReleaseResourceLite ( (PERESOURCE)hsem );
-  KeLeaveCriticalRegion();
+  W32Thread = PsGetThreadWin32Thread(PsGetCurrentThread());
+  if (W32Thread) --W32Thread->dwEngAcquireCount;
+  IntGdiReleaseSemaphore ( hsem );
 }
 
 /*

reactos/subsystems/win32/win32k/include/eng.h

@@ -20,4 +20,7 @@ IntEngWindowChanged(
         PWINDOW_OBJECT Window,
         FLONG flChanged);
 
+VOID FASTCALL IntGdiAcquireSemaphore ( HSEMAPHORE hsem );
+VOID FASTCALL IntGdiReleaseSemaphore ( HSEMAPHORE hsem );
+
 #endif /* _WIN32K_ENG_H */

reactos/subsystems/win32/win32k/include/tags.h

@@ -81,6 +81,7 @@
 #define TAG_WNDOBJ      TAG('W', 'N', 'D', 'O') /* window object */
 #define TAG_XLATEOBJ    TAG('X', 'L', 'A', 'O') /* xlate object */
 #define TAG_BITMAPOBJ   TAG('B', 'M', 'P', 'O') /* bitmap object */
+#define TAG_GSEM        TAG('G', 's', 'e', 'm') /* Gdi Semaphore */
 
 /* misc */
 #define TAG_DRIVER      TAG('G', 'D', 'R', 'V') /* video drivers */

reactos/subsystems/win32/win32k/include/win32.h

@@ -13,6 +13,7 @@ typedef struct _W32THREAD
   HANDLE hDesktop;
   PVOID pgdiDcattr;
   PVOID pgdiBrushAttr;
+  DWORD dwEngAcquireCount;
   BOOLEAN IsExiting;
   SINGLE_LIST_ENTRY  ReferencesList;
   ULONG Hooks;

reactos/subsystems/win32/win32k/ntddraw/dxeng.c

@@ -9,7 +9,7 @@
 #include <w32k.h>
 #include <debug.h>
 
-ERESOURCE  ghsemShareDevLock;
+HSEMAPHORE  ghsemShareDevLock = NULL;
 
 ULONG gcEngFuncs = DXENG_INDEX_DxEngLoadImage + 1;
 DRVFN gaEngFuncs [] =
@@ -171,23 +171,17 @@ DxEngUnlockDC(PDC pDC)
 *
 * @remarks.
 * It is being used in various ntuser* functions and ntgdi*
-* ReactOS specific: It is not in use yet.
+* ReactOS specific: It is not in use yet?
 *SystemResourcesList
 *--*/
 BOOLEAN
 STDCALL
 DxEngLockShareSem()
 {
-    BOOLEAN retVal = FALSE;
     DPRINT1("ReactX Calling : DxEngLockShareSem\n");
-#if 0
-    if (ExIsResourceAcquiredExclusiveLite(&ghsemShareDevLock) == FALSE)
-    {
-        KeEnterCriticalRegion();
-        retVal = ExAcquireResourceExclusiveLite(&ghsemShareDevLock, TRUE);
-    }
-#endif
-    return retVal;
+    if(!ghsemShareDevLock) ghsemShareDevLock = EngCreateSemaphore(); // Hax, should be in dllmain.c
+    IntGdiAcquireSemaphore(ghsemShareDevLock);
+    return TRUE;
 }
 
 /*++
@@ -200,7 +194,7 @@ DxEngLockShareSem()
 * This function returns TRUE no matter what.
 *
 * @remarks.
-* ReactOS specific: It is not in use yet.
+* ReactOS specific: It is not in use yet?
 *
 *--*/
 BOOLEAN
@@ -208,14 +202,7 @@ STDCALL
 DxEngUnlockShareSem()
 {
     DPRINT1("ReactX Calling : DxEngUnlockShareSem\n");
-
-#if 0
-    if (ExIsResourceAcquiredExclusiveLite(&ghsemShareDevLock) == TRUE)
-    {
-        ExReleaseResourceLite(&ghsemShareDevLock);
-        KeLeaveCriticalRegion();
-    }
-#endif
+    IntGdiReleaseSemaphore(ghsemShareDevLock);
     return TRUE;
 }
 

reactos/subsystems/win32/win32k/objects/dc.c

@@ -2705,21 +2705,21 @@ VOID FASTCALL
 IntGdiReferencePdev(PGDIDEVICE pPDev)
 {
   if(!hsemDriverMgmt) hsemDriverMgmt = EngCreateSemaphore(); // Hax, should be in dllmain.c
-  EngAcquireSemaphore(hsemDriverMgmt);
+  IntGdiAcquireSemaphore(hsemDriverMgmt);
   pPDev->cPdevRefs++;
-  EngReleaseSemaphore(hsemDriverMgmt);
+  IntGdiReleaseSemaphore(hsemDriverMgmt);
 }
 
 VOID FASTCALL
 IntGdiUnreferencePdev(PGDIDEVICE pPDev, DWORD CleanUpType) 
 {
-  EngAcquireSemaphore(hsemDriverMgmt);
+  IntGdiAcquireSemaphore(hsemDriverMgmt);
   pPDev->cPdevRefs--;
   if (!pPDev->cPdevRefs)
   {
      // Handle the destruction of pPDev or GDIDEVICE or PDEVOBJ or PDEV etc.
   }
-  EngReleaseSemaphore(hsemDriverMgmt);
+  IntGdiReleaseSemaphore(hsemDriverMgmt);
 }