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Another crash removed. Patch by Mike Nordell.

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svn path=/trunk/; revision=7010
This commit is contained in:
Thomas Bluemel 2003-12-14 00:45:39 +00:00
parent b295839f98
commit 78f6e71be8
1 changed files with 13 additions and 5 deletions
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18
reactos/subsys/win32k/ntuser/msgqueue.c
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@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: msgqueue.c,v 1.42 2003/12/12 14:22:37 gvg Exp $
/* $Id: msgqueue.c,v 1.43 2003/12/14 00:45:39 weiden Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -58,7 +58,7 @@ static ULONG SystemMessageQueueCount = 0;
static ULONG SystemMessageQueueMouseMove = -1;
static KSPIN_LOCK SystemMessageQueueLock;
static ULONG HardwareMessageQueueStamp = 0;
static ULONG volatile HardwareMessageQueueStamp = 0;
static LIST_ENTRY HardwareMessageQueueHead;
static FAST_MUTEX HardwareMessageQueueLock;
@ -150,6 +150,8 @@ MsqInsertSystemMessage(MSG* Msg, BOOL RemMouseMoveMsg)
while (mmov != SystemMessageQueueHead )
{
ULONG prev = mmov ? mmov - 1 : SYSTEM_MESSAGE_QUEUE_SIZE - 1;
ASSERT(mmov >= 0);
ASSERT(mmov < SYSTEM_MESSAGE_QUEUE_SIZE);
SystemMessageQueue[mmov] = SystemMessageQueue[prev];
mmov = prev;
}
@ -355,12 +357,14 @@ MsqPeekHardwareMessage(PUSER_MESSAGE_QUEUE MessageQueue, HWND hWnd,
BOOL Accept;
BOOL MouseClick;
PLIST_ENTRY CurrentEntry;
ULONG ActiveStamp;
PWINDOW_OBJECT DesktopWindow;
if( !IntGetScreenDC() ||
PsGetWin32Thread()->MessageQueue == W32kGetPrimitiveMessageQueue() )
{
return FALSE;
}
DesktopWindow = IntGetWindowObject(IntGetDesktopWindow());
/* Process messages in the message queue itself. */
@ -402,12 +406,15 @@ MsqPeekHardwareMessage(PUSER_MESSAGE_QUEUE MessageQueue, HWND hWnd,
PUSER_MESSAGE UserMsg;
MSG Msg;
ASSERT(SystemMessageQueueHead < SYSTEM_MESSAGE_QUEUE_SIZE);
Msg = SystemMessageQueue[SystemMessageQueueHead];
SystemMessageQueueHead =
(SystemMessageQueueHead + 1) % SYSTEM_MESSAGE_QUEUE_SIZE;
SystemMessageQueueCount--;
KeReleaseSpinLock(&SystemMessageQueueLock, OldIrql);
UserMsg = ExAllocateFromPagedLookasideList(&MessageLookasideList);
/* What to do if out of memory? For now we just panic a bit in debug */
ASSERT(UserMsg);
UserMsg->Msg = Msg;
InsertTailList(&HardwareMessageQueueHead, &UserMsg->ListEntry);
KeAcquireSpinLock(&SystemMessageQueueLock, &OldIrql);
@ -417,8 +424,8 @@ MsqPeekHardwareMessage(PUSER_MESSAGE_QUEUE MessageQueue, HWND hWnd,
* this is more efficient and just as effective.
*/
SystemMessageQueueMouseMove = -1;
KeReleaseSpinLock(&SystemMessageQueueLock, OldIrql);
HardwareMessageQueueStamp++;
KeReleaseSpinLock(&SystemMessageQueueLock, OldIrql);
/* Process messages in the queue until we find one to return. */
CurrentEntry = HardwareMessageQueueHead.Flink;
@ -428,10 +435,11 @@ MsqPeekHardwareMessage(PUSER_MESSAGE_QUEUE MessageQueue, HWND hWnd,
CONTAINING_RECORD(CurrentEntry, USER_MESSAGE, ListEntry);
CurrentEntry = CurrentEntry->Flink;
RemoveEntryList(&Current->ListEntry);
HardwareMessageQueueStamp++;
if (Current->Msg.message >= WM_MOUSEFIRST &&
Current->Msg.message <= WM_MOUSELAST)
{
ActiveStamp = HardwareMessageQueueStamp;
const ULONG ActiveStamp = HardwareMessageQueueStamp;
ExReleaseFastMutex(&HardwareMessageQueueLock);
/* Translate the message. */
Accept = MsqTranslateMouseMessage(hWnd, FilterLow, FilterHigh,