From 243eeb574a064fe9d501ff45946b575efc9d101f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=B4me=20Gardou?= <jerome.gardou@reactos.org>
Date: Mon, 5 Apr 2010 10:58:43 +0000
Subject: [PATCH] [WIN32K]   -Make direct DC release shared lock on surface
 each time they're unlocked.   -Now they don't hold it unless they're locked
 themselves.   -Do not create the device surface when switching modes, this is
 inconsistent with the PDEVOBJ creation, which does not.

*No more "you are freeing a surface which is still hold" debug message when switching modes*

svn path=/branches/reactos-yarotows/; revision=46733
---
 subsystems/win32/win32k/eng/pdevobj.c    | 38 ++++++++----------------
 subsystems/win32/win32k/include/dc.h     | 11 ++++---
 subsystems/win32/win32k/objects/dclife.c |  3 +-
 3 files changed, 19 insertions(+), 33 deletions(-)

diff --git a/subsystems/win32/win32k/eng/pdevobj.c b/subsystems/win32/win32k/eng/pdevobj.c
index 61bc0756692..5445e913724 100644
--- a/subsystems/win32/win32k/eng/pdevobj.c
+++ b/subsystems/win32/win32k/eng/pdevobj.c
@@ -60,8 +60,7 @@ PDEVOBJ_vRelease(PPDEVOBJ ppdev)
         /* Do we have a surface? */
         if(ppdev->pSurface)
         {
-            /* Release the surface and let the driver free it */
-            SURFACE_ShareUnlockSurface(ppdev->pSurface);
+            /* No one should hold a lock on this surface */
             ppdev->pfn.DisableSurface(ppdev->dhpdev);
         }
 
@@ -147,7 +146,7 @@ PDEVOBJ_pSurface(
 {
     HSURF hsurf;
 
-    DPRINT1("PDEVOBJ_pSurface()\n");
+    DPRINT("PDEVOBJ_pSurface()\n");
 
     /* Check if we already have a surface */
     if (ppdev->pSurface)
@@ -164,7 +163,7 @@ PDEVOBJ_pSurface(
         ppdev->pSurface = SURFACE_ShareLockSurface(hsurf);
     }
 
-    DPRINT1("PDEVOBJ_pSurface() returning %p\n", ppdev->pSurface);
+    DPRINT("PDEVOBJ_pSurface() returning %p\n", ppdev->pSurface);
     return ppdev->pSurface;
 }
 
@@ -292,7 +291,6 @@ PDEVOBJ_vSwitchPdev(
     PPDEVOBJ ppdev2)
 {
     PDEVOBJ pdevTmp;
-    HDEV hdev;
 
     /* Exchange data */
     pdevTmp = *ppdev;
@@ -312,9 +310,10 @@ PDEVOBJ_vSwitchPdev(
     /* Exchange surface */
     ppdev->pSurface = ppdev2->pSurface;
     ppdev2->pSurface = pdevTmp.pSurface;
-    hdev = ppdev->pSurface->SurfObj.hdev;
-    ppdev->pSurface->SurfObj.hdev = ppdev2->pSurface->SurfObj.hdev;
-    ppdev2->pSurface->SurfObj.hdev = hdev;
+    if(ppdev->pSurface)
+        ppdev->pSurface->SurfObj.hdev = (HDEV)ppdev;
+    if(ppdev2->pSurface)
+        ppdev2->pSurface->SurfObj.hdev = (HDEV)ppdev2;
 
     /* Exchange devinfo */
     ppdev->devinfo = ppdev2->devinfo;
@@ -338,7 +337,6 @@ PDEVOBJ_bSwitchMode(
 {
     UNICODE_STRING ustrDevice;
     PPDEVOBJ ppdevTmp;
-    PSURFACE pSurface;
     BOOL retval = FALSE;
 
     /* Lock the PDEV */
@@ -367,25 +365,14 @@ PDEVOBJ_bSwitchMode(
         goto leave;
     }
 
-    /* 3. Create a new surface */
-    pSurface = PDEVOBJ_pSurface(ppdevTmp);
-    if (!pSurface)
-    {
-        DPRINT1("DrvEnableSurface failed\n");
-        goto leave;
-    }
+    /* 3. Get DirectDraw information */
+    /* 4. Enable DirectDraw Not traced */
+    /* 5. Copy old PDEV state to new PDEV instance */
 
-    ASSERT(pSurface->BitsLock);
-
-    /* 4. Get DirectDraw information */
-    /* 5. Enable DirectDraw Not traced */
-    /* 6. Copy old PDEV state to new PDEV instance */
-
-    /* 7. Switch the PDEVs */
+    /* 6. Switch the PDEVs */
     PDEVOBJ_vSwitchPdev(ppdev, ppdevTmp);
-    ASSERT(ppdev->pSurface->BitsLock);
 
-    /* 8. Disable DirectDraw */
+    /* 7. Disable DirectDraw */
 
     PDEVOBJ_vRelease(ppdevTmp);
 
@@ -397,7 +384,6 @@ leave:
     EngReleaseSemaphore(ghsemPDEV);
 
     DPRINT1("leave, ppdev = %p, pSurface = %p\n", ppdev, ppdev->pSurface);
-    ASSERT(ppdev->pSurface->BitsLock);
 
     return retval;
 }
diff --git a/subsystems/win32/win32k/include/dc.h b/subsystems/win32/win32k/include/dc.h
index 8578f8e7070..36ffef2a71b 100644
--- a/subsystems/win32/win32k/include/dc.h
+++ b/subsystems/win32/win32k/include/dc.h
@@ -176,12 +176,9 @@ DC_LockDc(HDC hdc)
         /* Acquire shared PDEV lock */
         EngAcquireSemaphoreShared(pdc->ppdev->hsemDevLock);
 
-        /* Update Surface if needed */
-        if(pdc->dclevel.pSurface != pdc->ppdev->pSurface)
-        {
-            if(pdc->dclevel.pSurface) SURFACE_ShareUnlockSurface(pdc->dclevel.pSurface);
-            pdc->dclevel.pSurface = PDEVOBJ_pSurface(pdc->ppdev);
-        }
+        /* Assign Surface */
+        pdc->dclevel.pSurface = PDEVOBJ_pSurface(pdc->ppdev);
+
     }
     return pdc;
 }
@@ -192,6 +189,8 @@ DC_UnlockDc(PDC pdc)
 {
     if(pdc->dctype == DCTYPE_DIRECT)
     {
+        /* Release surface lock */
+        SURFACE_ShareUnlockSurface(pdc->dclevel.pSurface);
         /* Release PDEV lock */
         EngReleaseSemaphore(pdc->ppdev->hsemDevLock);
     }
diff --git a/subsystems/win32/win32k/objects/dclife.c b/subsystems/win32/win32k/objects/dclife.c
index 9e6b5b0f192..02fc6c5572c 100644
--- a/subsystems/win32/win32k/objects/dclife.c
+++ b/subsystems/win32/win32k/objects/dclife.c
@@ -377,7 +377,8 @@ ASSERT(pdc->rosdc.hGCClipRgn);
 
     PATH_Delete(pdc->dclevel.hPath);
 
-    if(pdc->dclevel.pSurface)
+    /* Ideally, no DC should hold a lock on a surface when being deleted */
+    if(pdc->dclevel.pSurface && pdc->dctype != DCTYPE_DIRECT)
         SURFACE_ShareUnlockSurface(pdc->dclevel.pSurface);
 
     PDEVOBJ_vRelease(pdc->ppdev) ;