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 );
335 GlobalFree16( queue->self );
343 /***********************************************************************
346 void QUEUE_DumpQueue( HQUEUE16 hQueue )
350 if (!(pq = (MESSAGEQUEUE*) QUEUE_Lock( hQueue )) )
352 WARN(msg, "%04x is not a queue handle\n", hQueue );
356 DUMP( "next: %12.4x Intertask SendMessage:\n"
357 "thread: %10p ----------------------\n"
359 "firstMsg: %8p msg: %11.8x\n"
360 "lastMsg: %8p wParam: %10.8x\n"
361 "msgCount: %8.4x lParam: %10.8x\n"
362 "lockCount: %7.4x lRet: %12.8x\n"
363 "wWinVer: %9.4x ISMH: %10.4x\n"
364 "paints: %10.4x hSendTask: %5.4x\n"
365 "timers: %10.4x hPrevSend: %5.4x\n"
369 pq->next, pq->thdb, pq->hWnd32, pq->firstMsg, pq->msg32,
370 pq->lastMsg, pq->wParam32, pq->msgCount, (unsigned)pq->lParam,
371 (unsigned)pq->lockCount, (unsigned)pq->SendMessageReturn,
372 pq->wWinVersion, pq->InSendMessageHandle,
373 pq->wPaintCount, pq->hSendingTask, pq->wTimerCount,
374 pq->hPrevSendingTask, pq->wakeBits, pq->wakeMask, pq->hCurHook);
380 /***********************************************************************
383 void QUEUE_WalkQueues(void)
386 HQUEUE16 hQueue = hFirstQueue;
388 DUMP( "Queue Msgs Thread Task Module\n" );
391 MESSAGEQUEUE *queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue );
394 WARN( msg, "Bad queue handle %04x\n", hQueue );
397 if (!GetModuleName( queue->thdb->process->task, module, sizeof(module )))
398 strcpy( module, "???" );
399 DUMP( "%04x %4d %p %04x %s\n", hQueue,queue->msgCount,
400 queue->thdb, queue->thdb->process->task, module );
401 hQueue = queue->next;
402 QUEUE_Unlock( queue );
408 /***********************************************************************
409 * QUEUE_IsExitingQueue
411 BOOL32 QUEUE_IsExitingQueue( HQUEUE16 hQueue )
413 return (hExitingQueue && (hQueue == hExitingQueue));
417 /***********************************************************************
418 * QUEUE_SetExitingQueue
420 void QUEUE_SetExitingQueue( HQUEUE16 hQueue )
422 hExitingQueue = hQueue;
426 /***********************************************************************
427 * QUEUE_CreateMsgQueue
429 * Creates a message queue. Doesn't link it into queue list!
431 static HQUEUE16 QUEUE_CreateMsgQueue( BOOL16 bCreatePerQData )
434 MESSAGEQUEUE * msgQueue;
435 TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
437 TRACE(msg,"(): Creating message queue...\n");
439 if (!(hQueue = GlobalAlloc16( GMEM_FIXED | GMEM_ZEROINIT,
440 sizeof(MESSAGEQUEUE) )))
443 msgQueue = (MESSAGEQUEUE *) GlobalLock16( hQueue );
447 msgQueue->self = hQueue;
448 msgQueue->wakeBits = msgQueue->changeBits = QS_SMPARAMSFREE;
449 msgQueue->wWinVersion = pTask ? pTask->version : 0;
451 InitializeCriticalSection( &msgQueue->cSection );
452 msgQueue->lockCount = 1;
453 msgQueue->magic = QUEUE_MAGIC;
455 /* Create and initialize our per queue data */
456 msgQueue->pQData = bCreatePerQData ? PERQDATA_CreateInstance() : NULL;
462 /***********************************************************************
463 * QUEUE_DeleteMsgQueue
465 * Unlinks and deletes a message queue.
467 * Note: We need to mask asynchronous events to make sure PostMessage works
468 * even in the signal handler.
470 BOOL32 QUEUE_DeleteMsgQueue( HQUEUE16 hQueue )
472 MESSAGEQUEUE * msgQueue = (MESSAGEQUEUE*)QUEUE_Lock(hQueue);
476 TRACE(msg,"(): Deleting message queue %04x\n", hQueue);
478 if (!hQueue || !msgQueue)
480 WARN(msg, "invalid argument.\n");
486 if( hCursorQueue == hQueue ) hCursorQueue = 0;
487 if( hActiveQueue == hQueue ) hActiveQueue = 0;
489 /* flush sent messages */
490 senderQ = msgQueue->hSendingTask;
493 MESSAGEQUEUE* sq = (MESSAGEQUEUE*)QUEUE_Lock(senderQ);
495 sq->SendMessageReturn = 0L;
496 QUEUE_SetWakeBit( sq, QS_SMRESULT );
497 senderQ = sq->hPrevSendingTask;
503 /* Release per queue data if present */
504 if ( msgQueue->pQData )
506 PERQDATA_Release( msgQueue->pQData );
507 msgQueue->pQData = 0;
510 /* remove the message queue from the global link list */
511 pPrev = &hFirstQueue;
512 while (*pPrev && (*pPrev != hQueue))
514 MESSAGEQUEUE *msgQ = (MESSAGEQUEUE*)GlobalLock16(*pPrev);
517 if ( !msgQ || (msgQ->magic != QUEUE_MAGIC) )
519 /* HQUEUE link list is corrupted, try to exit gracefully */
520 WARN( msg, "HQUEUE link list corrupted!\n");
526 if (pPrev && *pPrev) *pPrev = msgQueue->next;
531 /* free up resource used by MESSAGEQUEUE strcture */
532 msgQueue->lockCount--;
533 QUEUE_Unlock( msgQueue );
539 /***********************************************************************
540 * QUEUE_CreateSysMsgQueue
542 * Create the system message queue, and set the double-click speed.
543 * Must be called only once.
545 BOOL32 QUEUE_CreateSysMsgQueue( int size )
547 /* Note: We dont need perQ data for the system message queue */
548 if (!(hmemSysMsgQueue = QUEUE_CreateMsgQueue( FALSE )))
551 sysMsgQueue = (MESSAGEQUEUE *) GlobalLock16( hmemSysMsgQueue );
556 /***********************************************************************
559 MESSAGEQUEUE *QUEUE_GetSysQueue(void)
564 /***********************************************************************
567 void QUEUE_Signal( THDB *thdb )
569 /* Wake up thread waiting for message */
570 SetEvent( thdb->event );
572 PostEvent( thdb->process->task );
575 /***********************************************************************
578 static void QUEUE_Wait( DWORD wait_mask )
580 if ( THREAD_IsWin16( THREAD_Current() ) )
584 TRACE(msg, "current task is 32-bit, calling SYNC_DoWait\n");
585 MsgWaitForMultipleObjects( 0, NULL, FALSE, INFINITE32, wait_mask );
590 /***********************************************************************
593 * See "Windows Internals", p.449
595 void QUEUE_SetWakeBit( MESSAGEQUEUE *queue, WORD bit )
597 TRACE(msg,"queue = %04x (wm=%04x), bit = %04x\n",
598 queue->self, queue->wakeMask, bit );
600 if (bit & QS_MOUSE) pMouseQueue = queue;
601 if (bit & QS_KEY) pKbdQueue = queue;
602 queue->changeBits |= bit;
603 queue->wakeBits |= bit;
604 if (queue->wakeMask & bit)
607 QUEUE_Signal( queue->thdb );
612 /***********************************************************************
615 void QUEUE_ClearWakeBit( MESSAGEQUEUE *queue, WORD bit )
617 queue->changeBits &= ~bit;
618 queue->wakeBits &= ~bit;
622 /***********************************************************************
625 * See "Windows Internals", p.447
627 void QUEUE_WaitBits( WORD bits )
631 TRACE(msg,"q %04x waiting for %04x\n", GetFastQueue(), bits);
635 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return;
637 if (queue->changeBits & bits)
639 /* One of the bits is set; we can return */
641 QUEUE_Unlock( queue );
644 if (queue->wakeBits & QS_SENDMESSAGE)
646 /* Process the sent message immediately */
649 QUEUE_ReceiveMessage( queue );
650 QUEUE_Unlock( queue );
651 continue; /* nested sm crux */
654 queue->wakeMask = bits | QS_SENDMESSAGE;
655 if(queue->changeBits & bits)
657 QUEUE_Unlock( queue );
661 TRACE(msg,"%04x) wakeMask is %04x, waiting\n", queue->self, queue->wakeMask);
663 QUEUE_Wait( queue->wakeMask );
665 QUEUE_Unlock( queue );
670 /***********************************************************************
671 * QUEUE_ReceiveMessage
673 * This routine is called when a sent message is waiting for the queue.
675 void QUEUE_ReceiveMessage( MESSAGEQUEUE *queue )
677 MESSAGEQUEUE *senderQ = NULL;
678 HQUEUE16 prevSender = 0;
679 QSMCTRL* prevCtrlPtr = NULL;
682 TRACE(msg, "ReceiveMessage, queue %04x\n", queue->self );
683 if (!(queue->wakeBits & QS_SENDMESSAGE) ||
684 !(senderQ = (MESSAGEQUEUE*)QUEUE_Lock( queue->hSendingTask)))
685 { TRACE(msg,"\trcm: nothing to do\n"); return; }
687 if( !senderQ->hPrevSendingTask )
688 QUEUE_ClearWakeBit( queue, QS_SENDMESSAGE ); /* no more sent messages */
690 /* Save current state on stack */
691 prevSender = queue->InSendMessageHandle;
692 prevCtrlPtr = queue->smResultCurrent;
694 /* Remove sending queue from the list */
695 queue->InSendMessageHandle = queue->hSendingTask;
696 queue->smResultCurrent = senderQ->smResultInit;
697 queue->hSendingTask = senderQ->hPrevSendingTask;
699 TRACE(msg, "\trcm: smResultCurrent = %08x, prevCtrl = %08x\n",
700 (unsigned)queue->smResultCurrent, (unsigned)prevCtrlPtr );
701 QUEUE_SetWakeBit( senderQ, QS_SMPARAMSFREE );
703 TRACE(msg, "\trcm: calling wndproc - %08x %08x %08x %08x\n",
704 senderQ->hWnd32, senderQ->msg32,
705 senderQ->wParam32, (unsigned)senderQ->lParam );
707 if (IsWindow32( senderQ->hWnd32 ))
709 WND *wndPtr = WIN_FindWndPtr( senderQ->hWnd32 );
710 DWORD extraInfo = queue->GetMessageExtraInfoVal;
711 queue->GetMessageExtraInfoVal = senderQ->GetMessageExtraInfoVal;
713 if (senderQ->flags & QUEUE_SM_WIN32)
715 TRACE(msg, "\trcm: msg is Win32\n" );
716 if (senderQ->flags & QUEUE_SM_UNICODE)
717 result = CallWindowProc32W( wndPtr->winproc,
718 senderQ->hWnd32, senderQ->msg32,
719 senderQ->wParam32, senderQ->lParam );
721 result = CallWindowProc32A( wndPtr->winproc,
722 senderQ->hWnd32, senderQ->msg32,
723 senderQ->wParam32, senderQ->lParam );
725 else /* Win16 message */
726 result = CallWindowProc16( (WNDPROC16)wndPtr->winproc,
727 (HWND16) senderQ->hWnd32,
728 (UINT16) senderQ->msg32,
729 LOWORD (senderQ->wParam32),
732 queue->GetMessageExtraInfoVal = extraInfo; /* Restore extra info */
733 TRACE(msg,"\trcm: result = %08x\n", (unsigned)result );
735 else WARN(msg, "\trcm: bad hWnd\n");
737 QUEUE_Unlock( senderQ );
739 /* Return the result to the sender task */
740 ReplyMessage16( result );
742 queue->InSendMessageHandle = prevSender;
743 queue->smResultCurrent = prevCtrlPtr;
745 TRACE(msg,"done!\n");
748 /***********************************************************************
751 * Try to reply to all pending sent messages on exit.
753 void QUEUE_FlushMessages( HQUEUE16 hQueue )
755 MESSAGEQUEUE *queue = (MESSAGEQUEUE*)QUEUE_Lock( hQueue );
759 MESSAGEQUEUE *senderQ = (MESSAGEQUEUE*)QUEUE_Lock( queue->hSendingTask );
760 QSMCTRL* CtrlPtr = queue->smResultCurrent;
762 TRACE(msg,"Flushing queue %04x:\n", hQueue );
767 CtrlPtr = senderQ->smResultInit;
769 TRACE(msg,"\tfrom queue %04x, smResult %08x\n", queue->hSendingTask, (unsigned)CtrlPtr );
771 if( !(queue->hSendingTask = senderQ->hPrevSendingTask) )
772 QUEUE_ClearWakeBit( queue, QS_SENDMESSAGE );
774 QUEUE_SetWakeBit( senderQ, QS_SMPARAMSFREE );
776 queue->smResultCurrent = CtrlPtr;
777 while( senderQ->wakeBits & QS_SMRESULT ) OldYield();
779 senderQ->SendMessageReturn = 0;
780 senderQ->smResult = queue->smResultCurrent;
781 QUEUE_SetWakeBit( senderQ, QS_SMRESULT);
783 QUEUE_Unlock( senderQ );
785 senderQ = (MESSAGEQUEUE*)QUEUE_Lock( queue->hSendingTask );
788 queue->InSendMessageHandle = 0;
790 QUEUE_Unlock( queue );
795 /***********************************************************************
798 * Add a message to the queue. Return FALSE if queue is full.
800 BOOL32 QUEUE_AddMsg( HQUEUE16 hQueue, MSG32 *msg, DWORD extraInfo )
802 MESSAGEQUEUE *msgQueue;
806 if (!(msgQueue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return FALSE;
808 /* allocate new message in global heap for now */
809 if (!(qmsg = (QMSG *) HeapAlloc( SystemHeap, 0, sizeof(QMSG) ) ))
811 QUEUE_Unlock( msgQueue );
815 EnterCriticalSection( &msgQueue->cSection );
819 qmsg->extraInfo = extraInfo;
821 /* insert the message in the link list */
823 qmsg->prevMsg = msgQueue->lastMsg;
825 if (msgQueue->lastMsg)
826 msgQueue->lastMsg->nextMsg = qmsg;
828 /* update first and last anchor in message queue */
829 msgQueue->lastMsg = qmsg;
830 if (!msgQueue->firstMsg)
831 msgQueue->firstMsg = qmsg;
833 msgQueue->msgCount++;
835 LeaveCriticalSection( &msgQueue->cSection );
837 QUEUE_SetWakeBit( msgQueue, QS_POSTMESSAGE );
838 QUEUE_Unlock( msgQueue );
845 /***********************************************************************
848 * Find a message matching the given parameters. Return -1 if none available.
850 QMSG* QUEUE_FindMsg( MESSAGEQUEUE * msgQueue, HWND32 hwnd, int first, int last )
854 EnterCriticalSection( &msgQueue->cSection );
856 if (!msgQueue->msgCount)
858 else if (!hwnd && !first && !last)
859 qmsg = msgQueue->firstMsg;
862 /* look in linked list for message matching first and last criteria */
863 for (qmsg = msgQueue->firstMsg; qmsg; qmsg = qmsg->nextMsg)
865 MSG32 *msg = &(qmsg->msg);
867 if (!hwnd || (msg->hwnd == hwnd))
870 break; /* found it */
872 if ((msg->message >= first) && (msg->message <= last))
873 break; /* found it */
878 LeaveCriticalSection( &msgQueue->cSection );
885 /***********************************************************************
888 * Remove a message from the queue (pos must be a valid position).
890 void QUEUE_RemoveMsg( MESSAGEQUEUE * msgQueue, QMSG *qmsg )
892 EnterCriticalSection( &msgQueue->cSection );
894 /* set the linked list */
896 qmsg->prevMsg->nextMsg = qmsg->nextMsg;
899 qmsg->nextMsg->prevMsg = qmsg->prevMsg;
901 if (msgQueue->firstMsg == qmsg)
902 msgQueue->firstMsg = qmsg->nextMsg;
904 if (msgQueue->lastMsg == qmsg)
905 msgQueue->lastMsg = qmsg->prevMsg;
907 /* deallocate the memory for the message */
908 HeapFree( SystemHeap, 0, qmsg );
910 msgQueue->msgCount--;
911 if (!msgQueue->msgCount) msgQueue->wakeBits &= ~QS_POSTMESSAGE;
913 LeaveCriticalSection( &msgQueue->cSection );
917 /***********************************************************************
920 * Wake a queue upon reception of a hardware event.
922 static void QUEUE_WakeSomeone( UINT32 message )
928 MESSAGEQUEUE *queue = NULL;
931 hQueue = hCursorQueue;
933 if( (message >= WM_KEYFIRST) && (message <= WM_KEYLAST) )
937 hQueue = hActiveQueue;
941 wakeBit = (message == WM_MOUSEMOVE) ? QS_MOUSEMOVE : QS_MOUSEBUTTON;
942 if( (hwnd = GetCapture32()) )
943 if( (wndPtr = WIN_FindWndPtr( hwnd )) )
945 hQueue = wndPtr->hmemTaskQ;
949 if( (hwnd = GetSysModalWindow16()) )
951 if( (wndPtr = WIN_FindWndPtr( hwnd )) )
952 hQueue = wndPtr->hmemTaskQ;
956 queue = QUEUE_Lock( hQueue );
960 queue = QUEUE_Lock( hFirstQueue );
963 if (queue->wakeMask & wakeBit) break;
966 queue = QUEUE_Lock( queue->next );
970 WARN(msg, "couldn't find queue\n");
975 QUEUE_SetWakeBit( queue, wakeBit );
977 QUEUE_Unlock( queue );
981 /***********************************************************************
984 * Add an event to the system message queue.
985 * Note: the position is relative to the desktop window.
987 void hardware_event( WORD message, WORD wParam, LONG lParam,
988 int xPos, int yPos, DWORD time, DWORD extraInfo )
991 QMSG *qmsg = sysMsgQueue->lastMsg;
994 if (!sysMsgQueue) return;
996 /* Merge with previous event if possible */
998 if ((message == WM_MOUSEMOVE) && sysMsgQueue->lastMsg)
1000 msg = &(sysMsgQueue->lastMsg->msg);
1002 if ((msg->message == message) && (msg->wParam == wParam))
1005 qmsg = sysMsgQueue->lastMsg;
1012 /* Should I limit the number of message in
1013 the system message queue??? */
1015 /* Don't merge allocate a new msg in the global heap */
1017 if (!(qmsg = (QMSG *) HeapAlloc( SystemHeap, 0, sizeof(QMSG) ) ))
1020 /* put message at the end of the linked list */
1022 qmsg->prevMsg = sysMsgQueue->lastMsg;
1024 if (sysMsgQueue->lastMsg)
1025 sysMsgQueue->lastMsg->nextMsg = qmsg;
1027 /* set last and first anchor index in system message queue */
1028 sysMsgQueue->lastMsg = qmsg;
1029 if (!sysMsgQueue->firstMsg)
1030 sysMsgQueue->firstMsg = qmsg;
1032 sysMsgQueue->msgCount++;
1038 msg->message = message;
1039 msg->wParam = wParam;
1040 msg->lParam = lParam;
1044 qmsg->extraInfo = extraInfo;
1046 QUEUE_WakeSomeone( message );
1050 /***********************************************************************
1051 * QUEUE_GetQueueTask
1053 HTASK16 QUEUE_GetQueueTask( HQUEUE16 hQueue )
1057 MESSAGEQUEUE *queue = QUEUE_Lock( hQueue );
1061 hTask = queue->thdb->process->task;
1062 QUEUE_Unlock( queue );
1070 /***********************************************************************
1071 * QUEUE_IncPaintCount
1073 void QUEUE_IncPaintCount( HQUEUE16 hQueue )
1075 MESSAGEQUEUE *queue;
1077 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1078 queue->wPaintCount++;
1079 QUEUE_SetWakeBit( queue, QS_PAINT );
1080 QUEUE_Unlock( queue );
1084 /***********************************************************************
1085 * QUEUE_DecPaintCount
1087 void QUEUE_DecPaintCount( HQUEUE16 hQueue )
1089 MESSAGEQUEUE *queue;
1091 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1092 queue->wPaintCount--;
1093 if (!queue->wPaintCount) queue->wakeBits &= ~QS_PAINT;
1094 QUEUE_Unlock( queue );
1098 /***********************************************************************
1099 * QUEUE_IncTimerCount
1101 void QUEUE_IncTimerCount( HQUEUE16 hQueue )
1103 MESSAGEQUEUE *queue;
1105 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1106 queue->wTimerCount++;
1107 QUEUE_SetWakeBit( queue, QS_TIMER );
1108 QUEUE_Unlock( queue );
1112 /***********************************************************************
1113 * QUEUE_DecTimerCount
1115 void QUEUE_DecTimerCount( HQUEUE16 hQueue )
1117 MESSAGEQUEUE *queue;
1119 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1120 queue->wTimerCount--;
1121 if (!queue->wTimerCount) queue->wakeBits &= ~QS_TIMER;
1122 QUEUE_Unlock( queue );
1126 /***********************************************************************
1127 * PostQuitMessage16 (USER.6)
1129 void WINAPI PostQuitMessage16( INT16 exitCode )
1131 PostQuitMessage32( exitCode );
1135 /***********************************************************************
1136 * PostQuitMessage32 (USER32.421)
1138 * PostQuitMessage() posts a message to the system requesting an
1139 * application to terminate execution. As a result of this function,
1140 * the WM_QUIT message is posted to the application, and
1141 * PostQuitMessage() returns immediately. The exitCode parameter
1142 * specifies an application-defined exit code, which appears in the
1143 * _wParam_ parameter of the WM_QUIT message posted to the application.
1149 void WINAPI PostQuitMessage32( INT32 exitCode )
1151 MESSAGEQUEUE *queue;
1153 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return;
1154 queue->wPostQMsg = TRUE;
1155 queue->wExitCode = (WORD)exitCode;
1156 QUEUE_Unlock( queue );
1160 /***********************************************************************
1161 * GetWindowTask16 (USER.224)
1163 HTASK16 WINAPI GetWindowTask16( HWND16 hwnd )
1165 WND *wndPtr = WIN_FindWndPtr( hwnd );
1167 if (!wndPtr) return 0;
1168 return QUEUE_GetQueueTask( wndPtr->hmemTaskQ );
1171 /***********************************************************************
1172 * GetWindowThreadProcessId (USER32.313)
1174 DWORD WINAPI GetWindowThreadProcessId( HWND32 hwnd, LPDWORD process )
1179 WND *wndPtr = WIN_FindWndPtr( hwnd );
1181 if (!wndPtr) return 0;
1182 htask=QUEUE_GetQueueTask( wndPtr->hmemTaskQ );
1183 tdb = (TDB*)GlobalLock16(htask);
1184 if (!tdb || !tdb->thdb) return 0;
1185 if (process) *process = PDB_TO_PROCESS_ID( tdb->thdb->process );
1186 return THDB_TO_THREAD_ID( tdb->thdb );
1190 /***********************************************************************
1191 * SetMessageQueue16 (USER.266)
1193 BOOL16 WINAPI SetMessageQueue16( INT16 size )
1195 return SetMessageQueue32( size );
1199 /***********************************************************************
1200 * SetMessageQueue32 (USER32.494)
1202 BOOL32 WINAPI SetMessageQueue32( INT32 size )
1204 /* now obsolete the message queue will be expanded dynamically
1207 /* access the queue to create it if it's not existing */
1213 /***********************************************************************
1214 * InitThreadInput (USER.409)
1216 HQUEUE16 WINAPI InitThreadInput( WORD unknown, WORD flags )
1219 MESSAGEQUEUE *queuePtr;
1221 THDB *thdb = THREAD_Current();
1226 hQueue = thdb->teb.queue;
1230 /* Create thread message queue */
1231 if( !(hQueue = QUEUE_CreateMsgQueue( TRUE )))
1233 WARN(msg, "failed!\n");
1237 /* Link new queue into list */
1238 queuePtr = (MESSAGEQUEUE *)QUEUE_Lock( hQueue );
1239 queuePtr->thdb = THREAD_Current();
1242 SetThreadQueue( 0, hQueue );
1243 thdb->teb.queue = hQueue;
1245 queuePtr->next = hFirstQueue;
1246 hFirstQueue = hQueue;
1249 QUEUE_Unlock( queuePtr );
1255 /***********************************************************************
1256 * GetQueueStatus16 (USER.334)
1258 DWORD WINAPI GetQueueStatus16( UINT16 flags )
1260 MESSAGEQUEUE *queue;
1263 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return 0;
1264 ret = MAKELONG( queue->changeBits, queue->wakeBits );
1265 queue->changeBits = 0;
1266 QUEUE_Unlock( queue );
1268 return ret & MAKELONG( flags, flags );
1271 /***********************************************************************
1272 * GetQueueStatus32 (USER32.283)
1274 DWORD WINAPI GetQueueStatus32( UINT32 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 );
1288 /***********************************************************************
1289 * GetInputState16 (USER.335)
1291 BOOL16 WINAPI GetInputState16(void)
1293 return GetInputState32();
1296 /***********************************************************************
1297 * WaitForInputIdle (USER32.577)
1299 DWORD WINAPI WaitForInputIdle (HANDLE32 hProcess, DWORD dwTimeOut)
1301 FIXME (msg, "(hProcess=%d, dwTimeOut=%ld): stub\n", hProcess, dwTimeOut);
1303 return WAIT_TIMEOUT;
1307 /***********************************************************************
1308 * GetInputState32 (USER32.244)
1310 BOOL32 WINAPI GetInputState32(void)
1312 MESSAGEQUEUE *queue;
1315 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() )))
1317 ret = queue->wakeBits & (QS_KEY | QS_MOUSEBUTTON);
1318 QUEUE_Unlock( queue );
1323 /***********************************************************************
1324 * UserYield (USER.332)
1326 void WINAPI UserYield(void)
1328 TDB *pCurTask = (TDB *)GlobalLock16( GetCurrentTask() );
1329 MESSAGEQUEUE *queue = (MESSAGEQUEUE *)QUEUE_Lock( pCurTask->hQueue );
1331 if ( !THREAD_IsWin16( THREAD_Current() ) )
1333 FIXME(task, "called for Win32 thread (%04x)!\n", THREAD_Current()->teb_sel);
1334 QUEUE_Unlock( queue );
1338 /* Handle sent messages */
1339 while (queue && (queue->wakeBits & QS_SENDMESSAGE))
1340 QUEUE_ReceiveMessage( queue );
1342 QUEUE_Unlock( queue );
1346 queue = (MESSAGEQUEUE *)QUEUE_Lock( pCurTask->hQueue );
1347 while (queue && (queue->wakeBits & QS_SENDMESSAGE))
1348 QUEUE_ReceiveMessage( queue );
1350 QUEUE_Unlock( queue );
1353 /***********************************************************************
1354 * GetMessagePos (USER.119) (USER32.272)
1356 * The GetMessagePos() function returns a long value representing a
1357 * cursor position, in screen coordinates, when the last message
1358 * retrieved by the GetMessage() function occurs. The x-coordinate is
1359 * in the low-order word of the return value, the y-coordinate is in
1360 * the high-order word. The application can use the MAKEPOINT()
1361 * macro to obtain a POINT structure from the return value.
1363 * For the current cursor position, use GetCursorPos().
1367 * Cursor position of last message on success, zero on failure.
1374 DWORD WINAPI GetMessagePos(void)
1376 MESSAGEQUEUE *queue;
1379 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return 0;
1380 ret = queue->GetMessagePosVal;
1381 QUEUE_Unlock( queue );
1387 /***********************************************************************
1388 * GetMessageTime (USER.120) (USER32.273)
1390 * GetMessageTime() returns the message time for the last message
1391 * retrieved by the function. The time is measured in milliseconds with
1392 * the same offset as GetTickCount().
1394 * Since the tick count wraps, this is only useful for moderately short
1395 * relative time comparisons.
1399 * Time of last message on success, zero on failure.
1406 LONG WINAPI GetMessageTime(void)
1408 MESSAGEQUEUE *queue;
1411 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return 0;
1412 ret = queue->GetMessageTimeVal;
1413 QUEUE_Unlock( queue );
1419 /***********************************************************************
1420 * GetMessageExtraInfo (USER.288) (USER32.271)
1422 LONG WINAPI GetMessageExtraInfo(void)
1424 MESSAGEQUEUE *queue;
1427 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return 0;
1428 ret = queue->GetMessageExtraInfoVal;
1429 QUEUE_Unlock( queue );