1 /* * Message queues related functions
3 * Copyright 1993, 1994 Alexandre Julliard
13 #include "clipboard.h"
21 #define MAX_QUEUE_SIZE 120 /* Max. size of a message queue */
23 static HQUEUE16 hFirstQueue = 0;
24 static HQUEUE16 hExitingQueue = 0;
25 static HQUEUE16 hmemSysMsgQueue = 0;
26 static MESSAGEQUEUE *sysMsgQueue = NULL;
27 static PERQUEUEDATA *pQDataWin16 = NULL; /* Global perQData for Win16 tasks */
29 static MESSAGEQUEUE *pMouseQueue = NULL; /* Queue for last mouse message */
30 static MESSAGEQUEUE *pKbdQueue = NULL; /* Queue for last kbd message */
32 HQUEUE16 hCursorQueue = 0;
33 HQUEUE16 hActiveQueue = 0;
36 /***********************************************************************
37 * PERQDATA_CreateInstance
39 * Creates an instance of a reference counted PERQUEUEDATA element
40 * for the message queue. perQData is stored globally for 16 bit tasks.
42 * Note: We don't implement perQdata exactly the same way Windows does.
43 * Each perQData element is reference counted since it may be potentially
44 * shared by multiple message Queues (via AttachThreadInput).
45 * We only store the current values for Active, Capture and focus windows
48 PERQUEUEDATA * PERQDATA_CreateInstance( )
56 /* Share a single instance of perQData for all 16 bit tasks */
57 if ( ( bIsWin16 = THREAD_IsWin16( THREAD_Current() ) ) )
59 /* If previously allocated, just bump up ref count */
62 PERQDATA_Addref( pQDataWin16 );
67 /* Allocate PERQUEUEDATA from the system heap */
68 if (!( pQData = (PERQUEUEDATA *) HeapAlloc( SystemHeap, 0,
69 sizeof(PERQUEUEDATA) ) ))
73 pQData->hWndCapture = pQData->hWndFocus = pQData->hWndActive = 0;
74 pQData->ulRefCount = 1;
75 pQData->nCaptureHT = HTCLIENT;
77 /* Note: We have an independent critical section for the per queue data
78 * since this may be shared by different threads. see AttachThreadInput()
80 InitializeCriticalSection( &pQData->cSection );
82 /* Save perQData globally for 16 bit tasks */
90 /***********************************************************************
93 * Increment reference count for the PERQUEUEDATA instance
94 * Returns reference count for debugging purposes
96 ULONG PERQDATA_Addref( PERQUEUEDATA *pQData )
99 TRACE(msg,"(): current refcount %lu ...\n", pQData->ulRefCount);
101 EnterCriticalSection( &pQData->cSection );
102 ++pQData->ulRefCount;
103 LeaveCriticalSection( &pQData->cSection );
105 return pQData->ulRefCount;
109 /***********************************************************************
112 * Release a reference to a PERQUEUEDATA instance.
113 * Destroy the instance if no more references exist
114 * Returns reference count for debugging purposes
116 ULONG PERQDATA_Release( PERQUEUEDATA *pQData )
118 assert(pQData != 0 );
119 TRACE(msg,"(): current refcount %lu ...\n",
120 (LONG)pQData->ulRefCount );
122 EnterCriticalSection( &pQData->cSection );
123 if ( --pQData->ulRefCount == 0 )
125 LeaveCriticalSection( &pQData->cSection );
126 DeleteCriticalSection( &pQData->cSection );
128 TRACE(msg,"(): deleting PERQUEUEDATA instance ...\n" );
130 /* Deleting our global 16 bit perQData? */
131 if ( pQData == pQDataWin16 )
134 /* Free the PERQUEUEDATA instance */
135 HeapFree( SystemHeap, 0, pQData );
139 LeaveCriticalSection( &pQData->cSection );
141 return pQData->ulRefCount;
145 /***********************************************************************
146 * PERQDATA_GetFocusWnd
148 * Get the focus hwnd member in a threadsafe manner
150 HWND32 PERQDATA_GetFocusWnd( PERQUEUEDATA *pQData )
153 assert(pQData != 0 );
155 EnterCriticalSection( &pQData->cSection );
156 hWndFocus = pQData->hWndFocus;
157 LeaveCriticalSection( &pQData->cSection );
163 /***********************************************************************
164 * PERQDATA_SetFocusWnd
166 * Set the focus hwnd member in a threadsafe manner
168 HWND32 PERQDATA_SetFocusWnd( PERQUEUEDATA *pQData, HWND32 hWndFocus )
171 assert(pQData != 0 );
173 EnterCriticalSection( &pQData->cSection );
174 hWndFocusPrv = pQData->hWndFocus;
175 pQData->hWndFocus = hWndFocus;
176 LeaveCriticalSection( &pQData->cSection );
182 /***********************************************************************
183 * PERQDATA_GetActiveWnd
185 * Get the active hwnd member in a threadsafe manner
187 HWND32 PERQDATA_GetActiveWnd( PERQUEUEDATA *pQData )
190 assert(pQData != 0 );
192 EnterCriticalSection( &pQData->cSection );
193 hWndActive = pQData->hWndActive;
194 LeaveCriticalSection( &pQData->cSection );
200 /***********************************************************************
201 * PERQDATA_SetActiveWnd
203 * Set the active focus hwnd member in a threadsafe manner
205 HWND32 PERQDATA_SetActiveWnd( PERQUEUEDATA *pQData, HWND32 hWndActive )
207 HWND32 hWndActivePrv;
208 assert(pQData != 0 );
210 EnterCriticalSection( &pQData->cSection );
211 hWndActivePrv = pQData->hWndActive;
212 pQData->hWndActive = hWndActive;
213 LeaveCriticalSection( &pQData->cSection );
215 return hWndActivePrv;
219 /***********************************************************************
220 * PERQDATA_GetCaptureWnd
222 * Get the capture hwnd member in a threadsafe manner
224 HWND32 PERQDATA_GetCaptureWnd( PERQUEUEDATA *pQData )
227 assert(pQData != 0 );
229 EnterCriticalSection( &pQData->cSection );
230 hWndCapture = pQData->hWndCapture;
231 LeaveCriticalSection( &pQData->cSection );
237 /***********************************************************************
238 * PERQDATA_SetCaptureWnd
240 * Set the capture hwnd member in a threadsafe manner
242 HWND32 PERQDATA_SetCaptureWnd( PERQUEUEDATA *pQData, HWND32 hWndCapture )
244 HWND32 hWndCapturePrv;
245 assert(pQData != 0 );
247 EnterCriticalSection( &pQData->cSection );
248 hWndCapturePrv = pQData->hWndCapture;
249 pQData->hWndCapture = hWndCapture;
250 LeaveCriticalSection( &pQData->cSection );
252 return hWndCapturePrv;
256 /***********************************************************************
257 * PERQDATA_GetCaptureInfo
259 * Get the capture info member in a threadsafe manner
261 INT16 PERQDATA_GetCaptureInfo( PERQUEUEDATA *pQData )
264 assert(pQData != 0 );
266 EnterCriticalSection( &pQData->cSection );
267 nCaptureHT = pQData->nCaptureHT;
268 LeaveCriticalSection( &pQData->cSection );
274 /***********************************************************************
275 * PERQDATA_SetCaptureInfo
277 * Set the capture info member in a threadsafe manner
279 INT16 PERQDATA_SetCaptureInfo( PERQUEUEDATA *pQData, INT16 nCaptureHT )
282 assert(pQData != 0 );
284 EnterCriticalSection( &pQData->cSection );
285 nCaptureHTPrv = pQData->nCaptureHT;
286 pQData->nCaptureHT = nCaptureHT;
287 LeaveCriticalSection( &pQData->cSection );
289 return nCaptureHTPrv;
293 /***********************************************************************
296 * Function for getting a 32 bit pointer on queue strcture. For thread
297 * safeness programmers should use this function instead of GlobalLock to
298 * retrieve a pointer on the structure. QUEUE_Unlock should also be called
299 * when access to the queue structure is not required anymore.
301 MESSAGEQUEUE *QUEUE_Lock( HQUEUE16 hQueue )
306 queue = GlobalLock16( hQueue );
307 if ( !queue || (queue->magic != QUEUE_MAGIC) )
320 /***********************************************************************
323 * Use with QUEUE_Lock to get a thread safe acces to message queue
326 void QUEUE_Unlock( MESSAGEQUEUE *queue )
332 if ( --queue->lockCount == 0 )
334 DeleteCriticalSection ( &queue->cSection );
336 CloseHandle( queue->hEvent );
337 GlobalFree16( queue->self );
345 /***********************************************************************
348 void QUEUE_DumpQueue( HQUEUE16 hQueue )
352 if (!(pq = (MESSAGEQUEUE*) QUEUE_Lock( hQueue )) )
354 WARN(msg, "%04x is not a queue handle\n", hQueue );
358 DUMP( "next: %12.4x Intertask SendMessage:\n"
359 "thread: %10p ----------------------\n"
361 "firstMsg: %8p msg: %11.8x\n"
362 "lastMsg: %8p wParam: %10.8x\n"
363 "msgCount: %8.4x lParam: %10.8x\n"
364 "lockCount: %7.4x lRet: %12.8x\n"
365 "wWinVer: %9.4x ISMH: %10.4x\n"
366 "paints: %10.4x hSendTask: %5.4x\n"
367 "timers: %10.4x hPrevSend: %5.4x\n"
371 pq->next, pq->thdb, pq->hWnd32, pq->firstMsg, pq->msg32,
372 pq->lastMsg, pq->wParam32, pq->msgCount, (unsigned)pq->lParam,
373 (unsigned)pq->lockCount, (unsigned)pq->SendMessageReturn,
374 pq->wWinVersion, pq->InSendMessageHandle,
375 pq->wPaintCount, pq->hSendingTask, pq->wTimerCount,
376 pq->hPrevSendingTask, pq->wakeBits, pq->wakeMask, pq->hCurHook);
382 /***********************************************************************
385 void QUEUE_WalkQueues(void)
388 HQUEUE16 hQueue = hFirstQueue;
390 DUMP( "Queue Msgs Thread Task Module\n" );
393 MESSAGEQUEUE *queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue );
396 WARN( msg, "Bad queue handle %04x\n", hQueue );
399 if (!GetModuleName( queue->thdb->process->task, module, sizeof(module )))
400 strcpy( module, "???" );
401 DUMP( "%04x %4d %p %04x %s\n", hQueue,queue->msgCount,
402 queue->thdb, queue->thdb->process->task, module );
403 hQueue = queue->next;
404 QUEUE_Unlock( queue );
410 /***********************************************************************
411 * QUEUE_IsExitingQueue
413 BOOL32 QUEUE_IsExitingQueue( HQUEUE16 hQueue )
415 return (hExitingQueue && (hQueue == hExitingQueue));
419 /***********************************************************************
420 * QUEUE_SetExitingQueue
422 void QUEUE_SetExitingQueue( HQUEUE16 hQueue )
424 hExitingQueue = hQueue;
428 /***********************************************************************
429 * QUEUE_CreateMsgQueue
431 * Creates a message queue. Doesn't link it into queue list!
433 static HQUEUE16 QUEUE_CreateMsgQueue( BOOL16 bCreatePerQData )
436 MESSAGEQUEUE * msgQueue;
437 TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
439 TRACE(msg,"(): Creating message queue...\n");
441 if (!(hQueue = GlobalAlloc16( GMEM_FIXED | GMEM_ZEROINIT,
442 sizeof(MESSAGEQUEUE) )))
445 msgQueue = (MESSAGEQUEUE *) GlobalLock16( hQueue );
449 msgQueue->self = hQueue;
450 msgQueue->wakeBits = msgQueue->changeBits = QS_SMPARAMSFREE;
451 msgQueue->wWinVersion = pTask ? pTask->version : 0;
453 InitializeCriticalSection( &msgQueue->cSection );
455 /* Create an Event object for waiting on message, used by win32 thread
457 if ( !THREAD_IsWin16( THREAD_Current() ) )
459 msgQueue->hEvent = CreateEvent32A( NULL, FALSE, FALSE, NULL);
461 if (msgQueue->hEvent == 0)
463 WARN(msg, "CreateEvent32A is not able to create an event object");
466 msgQueue->hEvent = ConvertToGlobalHandle( msgQueue->hEvent );
469 msgQueue->hEvent = 0;
471 msgQueue->lockCount = 1;
472 msgQueue->magic = QUEUE_MAGIC;
474 /* Create and initialize our per queue data */
475 msgQueue->pQData = bCreatePerQData ? PERQDATA_CreateInstance() : NULL;
481 /***********************************************************************
482 * QUEUE_DeleteMsgQueue
484 * Unlinks and deletes a message queue.
486 * Note: We need to mask asynchronous events to make sure PostMessage works
487 * even in the signal handler.
489 BOOL32 QUEUE_DeleteMsgQueue( HQUEUE16 hQueue )
491 MESSAGEQUEUE * msgQueue = (MESSAGEQUEUE*)QUEUE_Lock(hQueue);
495 TRACE(msg,"(): Deleting message queue %04x\n", hQueue);
497 if (!hQueue || !msgQueue)
499 WARN(msg, "invalid argument.\n");
505 if( hCursorQueue == hQueue ) hCursorQueue = 0;
506 if( hActiveQueue == hQueue ) hActiveQueue = 0;
508 /* flush sent messages */
509 senderQ = msgQueue->hSendingTask;
512 MESSAGEQUEUE* sq = (MESSAGEQUEUE*)QUEUE_Lock(senderQ);
514 sq->SendMessageReturn = 0L;
515 QUEUE_SetWakeBit( sq, QS_SMRESULT );
516 senderQ = sq->hPrevSendingTask;
522 /* Release per queue data if present */
523 if ( msgQueue->pQData )
525 PERQDATA_Release( msgQueue->pQData );
526 msgQueue->pQData = 0;
529 /* remove the message queue from the global link list */
530 pPrev = &hFirstQueue;
531 while (*pPrev && (*pPrev != hQueue))
533 MESSAGEQUEUE *msgQ = (MESSAGEQUEUE*)GlobalLock16(*pPrev);
536 if ( !msgQ || (msgQ->magic != QUEUE_MAGIC) )
538 /* HQUEUE link list is corrupted, try to exit gracefully */
539 WARN( msg, "HQUEUE link list corrupted!\n");
545 if (pPrev && *pPrev) *pPrev = msgQueue->next;
550 /* free up resource used by MESSAGEQUEUE strcture */
551 msgQueue->lockCount--;
552 QUEUE_Unlock( msgQueue );
558 /***********************************************************************
559 * QUEUE_CreateSysMsgQueue
561 * Create the system message queue, and set the double-click speed.
562 * Must be called only once.
564 BOOL32 QUEUE_CreateSysMsgQueue( int size )
566 /* Note: We dont need perQ data for the system message queue */
567 if (!(hmemSysMsgQueue = QUEUE_CreateMsgQueue( FALSE )))
570 sysMsgQueue = (MESSAGEQUEUE *) GlobalLock16( hmemSysMsgQueue );
575 /***********************************************************************
578 MESSAGEQUEUE *QUEUE_GetSysQueue(void)
584 /***********************************************************************
587 static void QUEUE_Wait( DWORD wait_mask )
589 if ( THREAD_IsWin16( THREAD_Current() ) )
593 TRACE(msg, "current task is 32-bit, calling SYNC_DoWait\n");
594 MsgWaitForMultipleObjects( 0, NULL, FALSE, INFINITE32, wait_mask );
599 /***********************************************************************
602 * See "Windows Internals", p.449
604 void QUEUE_SetWakeBit( MESSAGEQUEUE *queue, WORD bit )
606 TRACE(msg,"queue = %04x (wm=%04x), bit = %04x\n",
607 queue->self, queue->wakeMask, bit );
609 if (bit & QS_MOUSE) pMouseQueue = queue;
610 if (bit & QS_KEY) pKbdQueue = queue;
611 queue->changeBits |= bit;
612 queue->wakeBits |= bit;
613 if (queue->wakeMask & bit)
617 /* Wake up thread waiting for message */
618 if ( THREAD_IsWin16( queue->thdb ) )
619 PostEvent( queue->thdb->process->task );
622 SetEvent( queue->hEvent );
628 /***********************************************************************
631 void QUEUE_ClearWakeBit( MESSAGEQUEUE *queue, WORD bit )
633 queue->changeBits &= ~bit;
634 queue->wakeBits &= ~bit;
638 /***********************************************************************
641 * See "Windows Internals", p.447
643 void QUEUE_WaitBits( WORD bits )
647 TRACE(msg,"q %04x waiting for %04x\n", GetFastQueue(), bits);
651 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return;
653 if (queue->changeBits & bits)
655 /* One of the bits is set; we can return */
657 QUEUE_Unlock( queue );
660 if (queue->wakeBits & QS_SENDMESSAGE)
662 /* Process the sent message immediately */
665 QUEUE_ReceiveMessage( queue );
666 QUEUE_Unlock( queue );
667 continue; /* nested sm crux */
670 queue->wakeMask = bits | QS_SENDMESSAGE;
671 if(queue->changeBits & bits)
673 QUEUE_Unlock( queue );
677 TRACE(msg,"%04x) wakeMask is %04x, waiting\n", queue->self, queue->wakeMask);
679 QUEUE_Wait( queue->wakeMask );
681 QUEUE_Unlock( queue );
686 /***********************************************************************
687 * QUEUE_ReceiveMessage
689 * This routine is called when a sent message is waiting for the queue.
691 void QUEUE_ReceiveMessage( MESSAGEQUEUE *queue )
693 MESSAGEQUEUE *senderQ = NULL;
694 HQUEUE16 prevSender = 0;
695 QSMCTRL* prevCtrlPtr = NULL;
698 TRACE(msg, "ReceiveMessage, queue %04x\n", queue->self );
699 if (!(queue->wakeBits & QS_SENDMESSAGE) ||
700 !(senderQ = (MESSAGEQUEUE*)QUEUE_Lock( queue->hSendingTask)))
701 { TRACE(msg,"\trcm: nothing to do\n"); return; }
703 if( !senderQ->hPrevSendingTask )
704 QUEUE_ClearWakeBit( queue, QS_SENDMESSAGE ); /* no more sent messages */
706 /* Save current state on stack */
707 prevSender = queue->InSendMessageHandle;
708 prevCtrlPtr = queue->smResultCurrent;
710 /* Remove sending queue from the list */
711 queue->InSendMessageHandle = queue->hSendingTask;
712 queue->smResultCurrent = senderQ->smResultInit;
713 queue->hSendingTask = senderQ->hPrevSendingTask;
715 TRACE(msg, "\trcm: smResultCurrent = %08x, prevCtrl = %08x\n",
716 (unsigned)queue->smResultCurrent, (unsigned)prevCtrlPtr );
717 QUEUE_SetWakeBit( senderQ, QS_SMPARAMSFREE );
719 TRACE(msg, "\trcm: calling wndproc - %08x %08x %08x %08x\n",
720 senderQ->hWnd32, senderQ->msg32,
721 senderQ->wParam32, (unsigned)senderQ->lParam );
723 if (IsWindow32( senderQ->hWnd32 ))
725 WND *wndPtr = WIN_FindWndPtr( senderQ->hWnd32 );
726 DWORD extraInfo = queue->GetMessageExtraInfoVal;
727 queue->GetMessageExtraInfoVal = senderQ->GetMessageExtraInfoVal;
729 if (senderQ->flags & QUEUE_SM_WIN32)
731 TRACE(msg, "\trcm: msg is Win32\n" );
732 if (senderQ->flags & QUEUE_SM_UNICODE)
733 result = CallWindowProc32W( wndPtr->winproc,
734 senderQ->hWnd32, senderQ->msg32,
735 senderQ->wParam32, senderQ->lParam );
737 result = CallWindowProc32A( wndPtr->winproc,
738 senderQ->hWnd32, senderQ->msg32,
739 senderQ->wParam32, senderQ->lParam );
741 else /* Win16 message */
742 result = CallWindowProc16( (WNDPROC16)wndPtr->winproc,
743 (HWND16) senderQ->hWnd32,
744 (UINT16) senderQ->msg32,
745 LOWORD (senderQ->wParam32),
748 queue->GetMessageExtraInfoVal = extraInfo; /* Restore extra info */
749 TRACE(msg,"\trcm: result = %08x\n", (unsigned)result );
751 else WARN(msg, "\trcm: bad hWnd\n");
753 QUEUE_Unlock( senderQ );
755 /* Return the result to the sender task */
756 ReplyMessage16( result );
758 queue->InSendMessageHandle = prevSender;
759 queue->smResultCurrent = prevCtrlPtr;
761 TRACE(msg,"done!\n");
764 /***********************************************************************
767 * Try to reply to all pending sent messages on exit.
769 void QUEUE_FlushMessages( HQUEUE16 hQueue )
771 MESSAGEQUEUE *queue = (MESSAGEQUEUE*)QUEUE_Lock( hQueue );
775 MESSAGEQUEUE *senderQ = (MESSAGEQUEUE*)QUEUE_Lock( queue->hSendingTask );
776 QSMCTRL* CtrlPtr = queue->smResultCurrent;
778 TRACE(msg,"Flushing queue %04x:\n", hQueue );
783 CtrlPtr = senderQ->smResultInit;
785 TRACE(msg,"\tfrom queue %04x, smResult %08x\n", queue->hSendingTask, (unsigned)CtrlPtr );
787 if( !(queue->hSendingTask = senderQ->hPrevSendingTask) )
788 QUEUE_ClearWakeBit( queue, QS_SENDMESSAGE );
790 QUEUE_SetWakeBit( senderQ, QS_SMPARAMSFREE );
792 queue->smResultCurrent = CtrlPtr;
793 while( senderQ->wakeBits & QS_SMRESULT ) OldYield();
795 senderQ->SendMessageReturn = 0;
796 senderQ->smResult = queue->smResultCurrent;
797 QUEUE_SetWakeBit( senderQ, QS_SMRESULT);
799 QUEUE_Unlock( senderQ );
801 senderQ = (MESSAGEQUEUE*)QUEUE_Lock( queue->hSendingTask );
804 queue->InSendMessageHandle = 0;
806 QUEUE_Unlock( queue );
811 /***********************************************************************
814 * Add a message to the queue. Return FALSE if queue is full.
816 BOOL32 QUEUE_AddMsg( HQUEUE16 hQueue, MSG32 *msg, DWORD extraInfo )
818 MESSAGEQUEUE *msgQueue;
822 if (!(msgQueue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return FALSE;
824 /* allocate new message in global heap for now */
825 if (!(qmsg = (QMSG *) HeapAlloc( SystemHeap, 0, sizeof(QMSG) ) ))
827 QUEUE_Unlock( msgQueue );
831 EnterCriticalSection( &msgQueue->cSection );
835 qmsg->extraInfo = extraInfo;
837 /* insert the message in the link list */
839 qmsg->prevMsg = msgQueue->lastMsg;
841 if (msgQueue->lastMsg)
842 msgQueue->lastMsg->nextMsg = qmsg;
844 /* update first and last anchor in message queue */
845 msgQueue->lastMsg = qmsg;
846 if (!msgQueue->firstMsg)
847 msgQueue->firstMsg = qmsg;
849 msgQueue->msgCount++;
851 LeaveCriticalSection( &msgQueue->cSection );
853 QUEUE_SetWakeBit( msgQueue, QS_POSTMESSAGE );
854 QUEUE_Unlock( msgQueue );
861 /***********************************************************************
864 * Find a message matching the given parameters. Return -1 if none available.
866 QMSG* QUEUE_FindMsg( MESSAGEQUEUE * msgQueue, HWND32 hwnd, int first, int last )
870 EnterCriticalSection( &msgQueue->cSection );
872 if (!msgQueue->msgCount)
874 else if (!hwnd && !first && !last)
875 qmsg = msgQueue->firstMsg;
878 /* look in linked list for message matching first and last criteria */
879 for (qmsg = msgQueue->firstMsg; qmsg; qmsg = qmsg->nextMsg)
881 MSG32 *msg = &(qmsg->msg);
883 if (!hwnd || (msg->hwnd == hwnd))
886 break; /* found it */
888 if ((msg->message >= first) && (msg->message <= last))
889 break; /* found it */
894 LeaveCriticalSection( &msgQueue->cSection );
901 /***********************************************************************
904 * Remove a message from the queue (pos must be a valid position).
906 void QUEUE_RemoveMsg( MESSAGEQUEUE * msgQueue, QMSG *qmsg )
908 EnterCriticalSection( &msgQueue->cSection );
910 /* set the linked list */
912 qmsg->prevMsg->nextMsg = qmsg->nextMsg;
915 qmsg->nextMsg->prevMsg = qmsg->prevMsg;
917 if (msgQueue->firstMsg == qmsg)
918 msgQueue->firstMsg = qmsg->nextMsg;
920 if (msgQueue->lastMsg == qmsg)
921 msgQueue->lastMsg = qmsg->prevMsg;
923 /* deallocate the memory for the message */
924 HeapFree( SystemHeap, 0, qmsg );
926 msgQueue->msgCount--;
927 if (!msgQueue->msgCount) msgQueue->wakeBits &= ~QS_POSTMESSAGE;
929 LeaveCriticalSection( &msgQueue->cSection );
933 /***********************************************************************
936 * Wake a queue upon reception of a hardware event.
938 static void QUEUE_WakeSomeone( UINT32 message )
944 MESSAGEQUEUE *queue = NULL;
947 hQueue = hCursorQueue;
949 if( (message >= WM_KEYFIRST) && (message <= WM_KEYLAST) )
953 hQueue = hActiveQueue;
957 wakeBit = (message == WM_MOUSEMOVE) ? QS_MOUSEMOVE : QS_MOUSEBUTTON;
958 if( (hwnd = GetCapture32()) )
959 if( (wndPtr = WIN_FindWndPtr( hwnd )) )
961 hQueue = wndPtr->hmemTaskQ;
965 if( (hwnd = GetSysModalWindow16()) )
967 if( (wndPtr = WIN_FindWndPtr( hwnd )) )
968 hQueue = wndPtr->hmemTaskQ;
972 queue = QUEUE_Lock( hQueue );
976 queue = QUEUE_Lock( hFirstQueue );
979 if (queue->wakeMask & wakeBit) break;
982 queue = QUEUE_Lock( queue->next );
986 WARN(msg, "couldn't find queue\n");
991 QUEUE_SetWakeBit( queue, wakeBit );
993 QUEUE_Unlock( queue );
997 /***********************************************************************
1000 * Add an event to the system message queue.
1001 * Note: the position is relative to the desktop window.
1003 void hardware_event( WORD message, WORD wParam, LONG lParam,
1004 int xPos, int yPos, DWORD time, DWORD extraInfo )
1007 QMSG *qmsg = sysMsgQueue->lastMsg;
1010 if (!sysMsgQueue) return;
1012 /* Merge with previous event if possible */
1014 if ((message == WM_MOUSEMOVE) && sysMsgQueue->lastMsg)
1016 msg = &(sysMsgQueue->lastMsg->msg);
1018 if ((msg->message == message) && (msg->wParam == wParam))
1021 qmsg = sysMsgQueue->lastMsg;
1028 /* Should I limit the number of message in
1029 the system message queue??? */
1031 /* Don't merge allocate a new msg in the global heap */
1033 if (!(qmsg = (QMSG *) HeapAlloc( SystemHeap, 0, sizeof(QMSG) ) ))
1036 /* put message at the end of the linked list */
1038 qmsg->prevMsg = sysMsgQueue->lastMsg;
1040 if (sysMsgQueue->lastMsg)
1041 sysMsgQueue->lastMsg->nextMsg = qmsg;
1043 /* set last and first anchor index in system message queue */
1044 sysMsgQueue->lastMsg = qmsg;
1045 if (!sysMsgQueue->firstMsg)
1046 sysMsgQueue->firstMsg = qmsg;
1048 sysMsgQueue->msgCount++;
1054 msg->message = message;
1055 msg->wParam = wParam;
1056 msg->lParam = lParam;
1060 qmsg->extraInfo = extraInfo;
1062 QUEUE_WakeSomeone( message );
1066 /***********************************************************************
1067 * QUEUE_GetQueueTask
1069 HTASK16 QUEUE_GetQueueTask( HQUEUE16 hQueue )
1073 MESSAGEQUEUE *queue = QUEUE_Lock( hQueue );
1077 hTask = queue->thdb->process->task;
1078 QUEUE_Unlock( queue );
1086 /***********************************************************************
1087 * QUEUE_IncPaintCount
1089 void QUEUE_IncPaintCount( HQUEUE16 hQueue )
1091 MESSAGEQUEUE *queue;
1093 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1094 queue->wPaintCount++;
1095 QUEUE_SetWakeBit( queue, QS_PAINT );
1096 QUEUE_Unlock( queue );
1100 /***********************************************************************
1101 * QUEUE_DecPaintCount
1103 void QUEUE_DecPaintCount( HQUEUE16 hQueue )
1105 MESSAGEQUEUE *queue;
1107 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1108 queue->wPaintCount--;
1109 if (!queue->wPaintCount) queue->wakeBits &= ~QS_PAINT;
1110 QUEUE_Unlock( queue );
1114 /***********************************************************************
1115 * QUEUE_IncTimerCount
1117 void QUEUE_IncTimerCount( HQUEUE16 hQueue )
1119 MESSAGEQUEUE *queue;
1121 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1122 queue->wTimerCount++;
1123 QUEUE_SetWakeBit( queue, QS_TIMER );
1124 QUEUE_Unlock( queue );
1128 /***********************************************************************
1129 * QUEUE_DecTimerCount
1131 void QUEUE_DecTimerCount( HQUEUE16 hQueue )
1133 MESSAGEQUEUE *queue;
1135 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1136 queue->wTimerCount--;
1137 if (!queue->wTimerCount) queue->wakeBits &= ~QS_TIMER;
1138 QUEUE_Unlock( queue );
1142 /***********************************************************************
1143 * PostQuitMessage16 (USER.6)
1145 void WINAPI PostQuitMessage16( INT16 exitCode )
1147 PostQuitMessage32( exitCode );
1151 /***********************************************************************
1152 * PostQuitMessage32 (USER32.421)
1154 * PostQuitMessage() posts a message to the system requesting an
1155 * application to terminate execution. As a result of this function,
1156 * the WM_QUIT message is posted to the application, and
1157 * PostQuitMessage() returns immediately. The exitCode parameter
1158 * specifies an application-defined exit code, which appears in the
1159 * _wParam_ parameter of the WM_QUIT message posted to the application.
1165 void WINAPI PostQuitMessage32( INT32 exitCode )
1167 MESSAGEQUEUE *queue;
1169 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return;
1170 queue->wPostQMsg = TRUE;
1171 queue->wExitCode = (WORD)exitCode;
1172 QUEUE_Unlock( queue );
1176 /***********************************************************************
1177 * GetWindowTask16 (USER.224)
1179 HTASK16 WINAPI GetWindowTask16( HWND16 hwnd )
1181 WND *wndPtr = WIN_FindWndPtr( hwnd );
1183 if (!wndPtr) return 0;
1184 return QUEUE_GetQueueTask( wndPtr->hmemTaskQ );
1187 /***********************************************************************
1188 * GetWindowThreadProcessId (USER32.313)
1190 DWORD WINAPI GetWindowThreadProcessId( HWND32 hwnd, LPDWORD process )
1195 WND *wndPtr = WIN_FindWndPtr( hwnd );
1197 if (!wndPtr) return 0;
1198 htask=QUEUE_GetQueueTask( wndPtr->hmemTaskQ );
1199 tdb = (TDB*)GlobalLock16(htask);
1200 if (!tdb || !tdb->thdb) return 0;
1201 if (process) *process = PDB_TO_PROCESS_ID( tdb->thdb->process );
1202 return THDB_TO_THREAD_ID( tdb->thdb );
1206 /***********************************************************************
1207 * SetMessageQueue16 (USER.266)
1209 BOOL16 WINAPI SetMessageQueue16( INT16 size )
1211 return SetMessageQueue32( size );
1215 /***********************************************************************
1216 * SetMessageQueue32 (USER32.494)
1218 BOOL32 WINAPI SetMessageQueue32( INT32 size )
1220 /* now obsolete the message queue will be expanded dynamically
1223 /* access the queue to create it if it's not existing */
1229 /***********************************************************************
1230 * InitThreadInput (USER.409)
1232 HQUEUE16 WINAPI InitThreadInput( WORD unknown, WORD flags )
1235 MESSAGEQUEUE *queuePtr;
1237 THDB *thdb = THREAD_Current();
1242 hQueue = thdb->teb.queue;
1246 /* Create thread message queue */
1247 if( !(hQueue = QUEUE_CreateMsgQueue( TRUE )))
1249 WARN(msg, "failed!\n");
1253 /* Link new queue into list */
1254 queuePtr = (MESSAGEQUEUE *)QUEUE_Lock( hQueue );
1255 queuePtr->thdb = THREAD_Current();
1258 SetThreadQueue( 0, hQueue );
1259 thdb->teb.queue = hQueue;
1261 queuePtr->next = hFirstQueue;
1262 hFirstQueue = hQueue;
1265 QUEUE_Unlock( queuePtr );
1271 /***********************************************************************
1272 * GetQueueStatus16 (USER.334)
1274 DWORD WINAPI GetQueueStatus16( UINT16 flags )
1276 MESSAGEQUEUE *queue;
1279 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return 0;
1280 ret = MAKELONG( queue->changeBits, queue->wakeBits );
1281 queue->changeBits = 0;
1282 QUEUE_Unlock( queue );
1284 return ret & MAKELONG( flags, flags );
1287 /***********************************************************************
1288 * GetQueueStatus32 (USER32.283)
1290 DWORD WINAPI GetQueueStatus32( UINT32 flags )
1292 MESSAGEQUEUE *queue;
1295 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return 0;
1296 ret = MAKELONG( queue->changeBits, queue->wakeBits );
1297 queue->changeBits = 0;
1298 QUEUE_Unlock( queue );
1300 return ret & MAKELONG( flags, flags );
1304 /***********************************************************************
1305 * GetInputState16 (USER.335)
1307 BOOL16 WINAPI GetInputState16(void)
1309 return GetInputState32();
1312 /***********************************************************************
1313 * WaitForInputIdle (USER32.577)
1315 DWORD WINAPI WaitForInputIdle (HANDLE32 hProcess, DWORD dwTimeOut)
1317 FIXME (msg, "(hProcess=%d, dwTimeOut=%ld): stub\n", hProcess, dwTimeOut);
1319 return WAIT_TIMEOUT;
1323 /***********************************************************************
1324 * GetInputState32 (USER32.244)
1326 BOOL32 WINAPI GetInputState32(void)
1328 MESSAGEQUEUE *queue;
1331 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() )))
1333 ret = queue->wakeBits & (QS_KEY | QS_MOUSEBUTTON);
1334 QUEUE_Unlock( queue );
1339 /***********************************************************************
1340 * UserYield (USER.332)
1342 void WINAPI UserYield(void)
1344 TDB *pCurTask = (TDB *)GlobalLock16( GetCurrentTask() );
1345 MESSAGEQUEUE *queue = (MESSAGEQUEUE *)QUEUE_Lock( pCurTask->hQueue );
1347 if ( !THREAD_IsWin16( THREAD_Current() ) )
1349 FIXME(task, "called for Win32 thread (%04x)!\n", THREAD_Current()->teb_sel);
1350 QUEUE_Unlock( queue );
1354 /* Handle sent messages */
1355 while (queue && (queue->wakeBits & QS_SENDMESSAGE))
1356 QUEUE_ReceiveMessage( queue );
1358 QUEUE_Unlock( queue );
1362 queue = (MESSAGEQUEUE *)QUEUE_Lock( pCurTask->hQueue );
1363 while (queue && (queue->wakeBits & QS_SENDMESSAGE))
1364 QUEUE_ReceiveMessage( queue );
1366 QUEUE_Unlock( queue );
1369 /***********************************************************************
1370 * GetMessagePos (USER.119) (USER32.272)
1372 * The GetMessagePos() function returns a long value representing a
1373 * cursor position, in screen coordinates, when the last message
1374 * retrieved by the GetMessage() function occurs. The x-coordinate is
1375 * in the low-order word of the return value, the y-coordinate is in
1376 * the high-order word. The application can use the MAKEPOINT()
1377 * macro to obtain a POINT structure from the return value.
1379 * For the current cursor position, use GetCursorPos().
1383 * Cursor position of last message on success, zero on failure.
1390 DWORD WINAPI GetMessagePos(void)
1392 MESSAGEQUEUE *queue;
1395 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return 0;
1396 ret = queue->GetMessagePosVal;
1397 QUEUE_Unlock( queue );
1403 /***********************************************************************
1404 * GetMessageTime (USER.120) (USER32.273)
1406 * GetMessageTime() returns the message time for the last message
1407 * retrieved by the function. The time is measured in milliseconds with
1408 * the same offset as GetTickCount().
1410 * Since the tick count wraps, this is only useful for moderately short
1411 * relative time comparisons.
1415 * Time of last message on success, zero on failure.
1422 LONG WINAPI GetMessageTime(void)
1424 MESSAGEQUEUE *queue;
1427 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return 0;
1428 ret = queue->GetMessageTimeVal;
1429 QUEUE_Unlock( queue );
1435 /***********************************************************************
1436 * GetMessageExtraInfo (USER.288) (USER32.271)
1438 LONG WINAPI GetMessageExtraInfo(void)
1440 MESSAGEQUEUE *queue;
1443 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return 0;
1444 ret = queue->GetMessageExtraInfoVal;
1445 QUEUE_Unlock( queue );