1 /* * Message queues related functions
3 * Copyright 1993, 1994 Alexandre Julliard
8 #include "wine/winbase16.h"
9 #include "wine/winuser16.h"
15 #include "clipboard.h"
24 DECLARE_DEBUG_CHANNEL(msg)
25 DECLARE_DEBUG_CHANNEL(sendmsg)
27 #define MAX_QUEUE_SIZE 120 /* Max. size of a message queue */
29 static HQUEUE16 hFirstQueue = 0;
30 static HQUEUE16 hExitingQueue = 0;
31 static HQUEUE16 hmemSysMsgQueue = 0;
32 static MESSAGEQUEUE *sysMsgQueue = NULL;
33 static PERQUEUEDATA *pQDataWin16 = NULL; /* Global perQData for Win16 tasks */
35 static MESSAGEQUEUE *pMouseQueue = NULL; /* Queue for last mouse message */
36 static MESSAGEQUEUE *pKbdQueue = NULL; /* Queue for last kbd message */
38 HQUEUE16 hCursorQueue = 0;
39 HQUEUE16 hActiveQueue = 0;
42 /***********************************************************************
43 * PERQDATA_CreateInstance
45 * Creates an instance of a reference counted PERQUEUEDATA element
46 * for the message queue. perQData is stored globally for 16 bit tasks.
48 * Note: We don't implement perQdata exactly the same way Windows does.
49 * Each perQData element is reference counted since it may be potentially
50 * shared by multiple message Queues (via AttachThreadInput).
51 * We only store the current values for Active, Capture and focus windows
54 PERQUEUEDATA * PERQDATA_CreateInstance( )
62 /* Share a single instance of perQData for all 16 bit tasks */
63 if ( ( bIsWin16 = THREAD_IsWin16( THREAD_Current() ) ) )
65 /* If previously allocated, just bump up ref count */
68 PERQDATA_Addref( pQDataWin16 );
73 /* Allocate PERQUEUEDATA from the system heap */
74 if (!( pQData = (PERQUEUEDATA *) HeapAlloc( SystemHeap, 0,
75 sizeof(PERQUEUEDATA) ) ))
79 pQData->hWndCapture = pQData->hWndFocus = pQData->hWndActive = 0;
80 pQData->ulRefCount = 1;
81 pQData->nCaptureHT = HTCLIENT;
83 /* Note: We have an independent critical section for the per queue data
84 * since this may be shared by different threads. see AttachThreadInput()
86 InitializeCriticalSection( &pQData->cSection );
88 /* Save perQData globally for 16 bit tasks */
96 /***********************************************************************
99 * Increment reference count for the PERQUEUEDATA instance
100 * Returns reference count for debugging purposes
102 ULONG PERQDATA_Addref( PERQUEUEDATA *pQData )
104 assert(pQData != 0 );
105 TRACE(msg,"(): current refcount %lu ...\n", pQData->ulRefCount);
107 EnterCriticalSection( &pQData->cSection );
108 ++pQData->ulRefCount;
109 LeaveCriticalSection( &pQData->cSection );
111 return pQData->ulRefCount;
115 /***********************************************************************
118 * Release a reference to a PERQUEUEDATA instance.
119 * Destroy the instance if no more references exist
120 * Returns reference count for debugging purposes
122 ULONG PERQDATA_Release( PERQUEUEDATA *pQData )
124 assert(pQData != 0 );
125 TRACE(msg,"(): current refcount %lu ...\n",
126 (LONG)pQData->ulRefCount );
128 EnterCriticalSection( &pQData->cSection );
129 if ( --pQData->ulRefCount == 0 )
131 LeaveCriticalSection( &pQData->cSection );
132 DeleteCriticalSection( &pQData->cSection );
134 TRACE(msg,"(): deleting PERQUEUEDATA instance ...\n" );
136 /* Deleting our global 16 bit perQData? */
137 if ( pQData == pQDataWin16 )
140 /* Free the PERQUEUEDATA instance */
141 HeapFree( SystemHeap, 0, pQData );
145 LeaveCriticalSection( &pQData->cSection );
147 return pQData->ulRefCount;
151 /***********************************************************************
152 * PERQDATA_GetFocusWnd
154 * Get the focus hwnd member in a threadsafe manner
156 HWND PERQDATA_GetFocusWnd( PERQUEUEDATA *pQData )
159 assert(pQData != 0 );
161 EnterCriticalSection( &pQData->cSection );
162 hWndFocus = pQData->hWndFocus;
163 LeaveCriticalSection( &pQData->cSection );
169 /***********************************************************************
170 * PERQDATA_SetFocusWnd
172 * Set the focus hwnd member in a threadsafe manner
174 HWND PERQDATA_SetFocusWnd( PERQUEUEDATA *pQData, HWND hWndFocus )
177 assert(pQData != 0 );
179 EnterCriticalSection( &pQData->cSection );
180 hWndFocusPrv = pQData->hWndFocus;
181 pQData->hWndFocus = hWndFocus;
182 LeaveCriticalSection( &pQData->cSection );
188 /***********************************************************************
189 * PERQDATA_GetActiveWnd
191 * Get the active hwnd member in a threadsafe manner
193 HWND PERQDATA_GetActiveWnd( PERQUEUEDATA *pQData )
196 assert(pQData != 0 );
198 EnterCriticalSection( &pQData->cSection );
199 hWndActive = pQData->hWndActive;
200 LeaveCriticalSection( &pQData->cSection );
206 /***********************************************************************
207 * PERQDATA_SetActiveWnd
209 * Set the active focus hwnd member in a threadsafe manner
211 HWND PERQDATA_SetActiveWnd( PERQUEUEDATA *pQData, HWND hWndActive )
214 assert(pQData != 0 );
216 EnterCriticalSection( &pQData->cSection );
217 hWndActivePrv = pQData->hWndActive;
218 pQData->hWndActive = hWndActive;
219 LeaveCriticalSection( &pQData->cSection );
221 return hWndActivePrv;
225 /***********************************************************************
226 * PERQDATA_GetCaptureWnd
228 * Get the capture hwnd member in a threadsafe manner
230 HWND PERQDATA_GetCaptureWnd( PERQUEUEDATA *pQData )
233 assert(pQData != 0 );
235 EnterCriticalSection( &pQData->cSection );
236 hWndCapture = pQData->hWndCapture;
237 LeaveCriticalSection( &pQData->cSection );
243 /***********************************************************************
244 * PERQDATA_SetCaptureWnd
246 * Set the capture hwnd member in a threadsafe manner
248 HWND PERQDATA_SetCaptureWnd( PERQUEUEDATA *pQData, HWND hWndCapture )
251 assert(pQData != 0 );
253 EnterCriticalSection( &pQData->cSection );
254 hWndCapturePrv = pQData->hWndCapture;
255 pQData->hWndCapture = hWndCapture;
256 LeaveCriticalSection( &pQData->cSection );
258 return hWndCapturePrv;
262 /***********************************************************************
263 * PERQDATA_GetCaptureInfo
265 * Get the capture info member in a threadsafe manner
267 INT16 PERQDATA_GetCaptureInfo( PERQUEUEDATA *pQData )
270 assert(pQData != 0 );
272 EnterCriticalSection( &pQData->cSection );
273 nCaptureHT = pQData->nCaptureHT;
274 LeaveCriticalSection( &pQData->cSection );
280 /***********************************************************************
281 * PERQDATA_SetCaptureInfo
283 * Set the capture info member in a threadsafe manner
285 INT16 PERQDATA_SetCaptureInfo( PERQUEUEDATA *pQData, INT16 nCaptureHT )
288 assert(pQData != 0 );
290 EnterCriticalSection( &pQData->cSection );
291 nCaptureHTPrv = pQData->nCaptureHT;
292 pQData->nCaptureHT = nCaptureHT;
293 LeaveCriticalSection( &pQData->cSection );
295 return nCaptureHTPrv;
299 /***********************************************************************
302 * Function for getting a 32 bit pointer on queue strcture. For thread
303 * safeness programmers should use this function instead of GlobalLock to
304 * retrieve a pointer on the structure. QUEUE_Unlock should also be called
305 * when access to the queue structure is not required anymore.
307 MESSAGEQUEUE *QUEUE_Lock( HQUEUE16 hQueue )
311 HeapLock( SystemHeap ); /* FIXME: a bit overkill */
312 queue = GlobalLock16( hQueue );
313 if ( !queue || (queue->magic != QUEUE_MAGIC) )
315 HeapUnlock( SystemHeap );
320 HeapUnlock( SystemHeap );
325 /***********************************************************************
328 * Use with QUEUE_Lock to get a thread safe acces to message queue
331 void QUEUE_Unlock( MESSAGEQUEUE *queue )
335 HeapLock( SystemHeap ); /* FIXME: a bit overkill */
337 if ( --queue->lockCount == 0 )
339 DeleteCriticalSection ( &queue->cSection );
341 CloseHandle( queue->hEvent );
342 GlobalFree16( queue->self );
345 HeapUnlock( SystemHeap );
350 /***********************************************************************
353 void QUEUE_DumpQueue( HQUEUE16 hQueue )
357 if (!(pq = (MESSAGEQUEUE*) QUEUE_Lock( hQueue )) )
359 WARN(msg, "%04x is not a queue handle\n", hQueue );
363 DUMP( "next: %12.4x Intertask SendMessage:\n"
364 "thread: %10p ----------------------\n"
365 "firstMsg: %8p smWaiting: %10p\n"
366 "lastMsg: %8p smPending: %10p\n"
367 "msgCount: %8.4x smProcessing: %10p\n"
375 pq->next, pq->thdb, pq->firstMsg, pq->smWaiting, pq->lastMsg,
376 pq->smPending, pq->msgCount, pq->smProcessing,
377 (unsigned)pq->lockCount, pq->wWinVersion,
378 pq->wPaintCount, pq->wTimerCount,
379 pq->wakeBits, pq->wakeMask, pq->hCurHook);
385 /***********************************************************************
388 void QUEUE_WalkQueues(void)
391 HQUEUE16 hQueue = hFirstQueue;
393 DUMP( "Queue Msgs Thread Task Module\n" );
396 MESSAGEQUEUE *queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue );
399 WARN( msg, "Bad queue handle %04x\n", hQueue );
402 if (!GetModuleName16( queue->thdb->process->task, module, sizeof(module )))
403 strcpy( module, "???" );
404 DUMP( "%04x %4d %p %04x %s\n", hQueue,queue->msgCount,
405 queue->thdb, queue->thdb->process->task, module );
406 hQueue = queue->next;
407 QUEUE_Unlock( queue );
413 /***********************************************************************
414 * QUEUE_IsExitingQueue
416 BOOL QUEUE_IsExitingQueue( HQUEUE16 hQueue )
418 return (hExitingQueue && (hQueue == hExitingQueue));
422 /***********************************************************************
423 * QUEUE_SetExitingQueue
425 void QUEUE_SetExitingQueue( HQUEUE16 hQueue )
427 hExitingQueue = hQueue;
431 /***********************************************************************
432 * QUEUE_CreateMsgQueue
434 * Creates a message queue. Doesn't link it into queue list!
436 static HQUEUE16 QUEUE_CreateMsgQueue( BOOL16 bCreatePerQData )
439 MESSAGEQUEUE * msgQueue;
440 TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
442 TRACE(msg,"(): Creating message queue...\n");
444 if (!(hQueue = GlobalAlloc16( GMEM_FIXED | GMEM_ZEROINIT,
445 sizeof(MESSAGEQUEUE) )))
448 msgQueue = (MESSAGEQUEUE *) GlobalLock16( hQueue );
452 msgQueue->self = hQueue;
453 msgQueue->wakeBits = msgQueue->changeBits = 0;
454 msgQueue->wWinVersion = pTask ? pTask->version : 0;
456 InitializeCriticalSection( &msgQueue->cSection );
457 MakeCriticalSectionGlobal( &msgQueue->cSection );
459 /* Create an Event object for waiting on message, used by win32 thread
461 if ( !THREAD_IsWin16( THREAD_Current() ) )
463 msgQueue->hEvent = CreateEventA( NULL, FALSE, FALSE, NULL);
465 if (msgQueue->hEvent == 0)
467 WARN(msg, "CreateEvent32A is not able to create an event object");
470 msgQueue->hEvent = ConvertToGlobalHandle( msgQueue->hEvent );
473 msgQueue->hEvent = 0;
475 msgQueue->lockCount = 1;
476 msgQueue->magic = QUEUE_MAGIC;
478 /* Create and initialize our per queue data */
479 msgQueue->pQData = bCreatePerQData ? PERQDATA_CreateInstance() : NULL;
485 /***********************************************************************
488 * Try to reply to all pending sent messages on exit.
490 void QUEUE_FlushMessages( MESSAGEQUEUE *queue )
493 MESSAGEQUEUE *senderQ = 0;
497 EnterCriticalSection( &queue->cSection );
499 /* empty the list of pending SendMessage waiting to be received */
500 while (queue->smPending)
502 smsg = QUEUE_RemoveSMSG( queue, SM_PENDING_LIST, 0);
504 senderQ = (MESSAGEQUEUE*)QUEUE_Lock( smsg->hSrcQueue );
508 /* return 0, to unblock other thread */
510 smsg->flags |= SMSG_HAVE_RESULT;
511 QUEUE_SetWakeBit( senderQ, QS_SMRESULT);
513 QUEUE_Unlock( senderQ );
516 QUEUE_ClearWakeBit( queue, QS_SENDMESSAGE );
518 LeaveCriticalSection( &queue->cSection );
523 /***********************************************************************
524 * QUEUE_DeleteMsgQueue
526 * Unlinks and deletes a message queue.
528 * Note: We need to mask asynchronous events to make sure PostMessage works
529 * even in the signal handler.
531 BOOL QUEUE_DeleteMsgQueue( HQUEUE16 hQueue )
533 MESSAGEQUEUE * msgQueue = (MESSAGEQUEUE*)QUEUE_Lock(hQueue);
536 TRACE(msg,"(): Deleting message queue %04x\n", hQueue);
538 if (!hQueue || !msgQueue)
540 WARN(msg, "invalid argument.\n");
546 if( hCursorQueue == hQueue ) hCursorQueue = 0;
547 if( hActiveQueue == hQueue ) hActiveQueue = 0;
549 /* flush sent messages */
550 QUEUE_FlushMessages( msgQueue );
552 HeapLock( SystemHeap ); /* FIXME: a bit overkill */
554 /* Release per queue data if present */
555 if ( msgQueue->pQData )
557 PERQDATA_Release( msgQueue->pQData );
558 msgQueue->pQData = 0;
561 /* remove the message queue from the global link list */
562 pPrev = &hFirstQueue;
563 while (*pPrev && (*pPrev != hQueue))
565 MESSAGEQUEUE *msgQ = (MESSAGEQUEUE*)GlobalLock16(*pPrev);
568 if ( !msgQ || (msgQ->magic != QUEUE_MAGIC) )
570 /* HQUEUE link list is corrupted, try to exit gracefully */
571 WARN( msg, "HQUEUE link list corrupted!\n");
577 if (pPrev && *pPrev) *pPrev = msgQueue->next;
580 HeapUnlock( SystemHeap );
582 /* free up resource used by MESSAGEQUEUE strcture */
583 msgQueue->lockCount--;
584 QUEUE_Unlock( msgQueue );
590 /***********************************************************************
591 * QUEUE_CreateSysMsgQueue
593 * Create the system message queue, and set the double-click speed.
594 * Must be called only once.
596 BOOL QUEUE_CreateSysMsgQueue( int size )
598 /* Note: We dont need perQ data for the system message queue */
599 if (!(hmemSysMsgQueue = QUEUE_CreateMsgQueue( FALSE )))
602 sysMsgQueue = (MESSAGEQUEUE *) GlobalLock16( hmemSysMsgQueue );
607 /***********************************************************************
610 MESSAGEQUEUE *QUEUE_GetSysQueue(void)
616 /***********************************************************************
619 * See "Windows Internals", p.449
621 void QUEUE_SetWakeBit( MESSAGEQUEUE *queue, WORD bit )
623 TRACE(msg,"queue = %04x (wm=%04x), bit = %04x\n",
624 queue->self, queue->wakeMask, bit );
626 if (bit & QS_MOUSE) pMouseQueue = queue;
627 if (bit & QS_KEY) pKbdQueue = queue;
628 queue->changeBits |= bit;
629 queue->wakeBits |= bit;
630 if (queue->wakeMask & bit)
634 /* Wake up thread waiting for message */
635 if ( THREAD_IsWin16( queue->thdb ) )
636 PostEvent16( queue->thdb->process->task );
639 SetEvent( queue->hEvent );
645 /***********************************************************************
648 void QUEUE_ClearWakeBit( MESSAGEQUEUE *queue, WORD bit )
650 queue->changeBits &= ~bit;
651 queue->wakeBits &= ~bit;
655 /***********************************************************************
658 * See "Windows Internals", p.447
661 * 0 if exit with timeout
664 int QUEUE_WaitBits( WORD bits, DWORD timeout )
669 TRACE(msg,"q %04x waiting for %04x\n", GetFastQueue16(), bits);
671 if ( THREAD_IsWin16( THREAD_Current() ) && (timeout != INFINITE) )
672 curTime = GetTickCount();
674 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
678 if (queue->changeBits & bits)
680 /* One of the bits is set; we can return */
682 QUEUE_Unlock( queue );
685 if (queue->wakeBits & QS_SENDMESSAGE)
687 /* Process the sent message immediately */
690 QUEUE_ReceiveMessage( queue );
691 continue; /* nested sm crux */
694 queue->wakeMask = bits | QS_SENDMESSAGE;
695 if(queue->changeBits & bits)
700 TRACE(msg,"%04x) wakeMask is %04x, waiting\n", queue->self, queue->wakeMask);
702 if ( !THREAD_IsWin16( THREAD_Current() ) )
704 /* win32 thread, use WaitForMultipleObjects */
705 MsgWaitForMultipleObjects( 0, NULL, FALSE, timeout, queue->wakeMask );
709 if ( timeout == INFINITE )
710 WaitEvent16( 0 ); /* win 16 thread, use WaitEvent */
713 /* check for timeout, then give control to other tasks */
714 if (GetTickCount() - curTime > timeout)
717 QUEUE_Unlock( queue );
718 return 0; /* exit with timeout */
727 /***********************************************************************
730 * This routine is called when a SMSG need to be added to one of the three
731 * SM list. (SM_PROCESSING_LIST, SM_PENDING_LIST, SM_WAITING_LIST)
733 BOOL QUEUE_AddSMSG( MESSAGEQUEUE *queue, int list, SMSG *smsg )
735 TRACE(sendmsg,"queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
736 smsg, SPY_GetMsgName(smsg->msg));
740 case SM_PROCESSING_LIST:
741 /* don't need to be thread safe, only accessed by the
742 thread associated with the sender queue */
743 smsg->nextProcessing = queue->smProcessing;
744 queue->smProcessing = smsg;
747 case SM_WAITING_LIST:
748 /* don't need to be thread safe, only accessed by the
749 thread associated with the receiver queue */
750 smsg->nextWaiting = queue->smWaiting;
751 queue->smWaiting = smsg;
754 case SM_PENDING_LIST:
756 /* make it thread safe, could be accessed by the sender and
760 EnterCriticalSection( &queue->cSection );
761 smsg->nextPending = NULL;
762 prev = &queue->smPending;
764 prev = &(*prev)->nextPending;
766 LeaveCriticalSection( &queue->cSection );
768 QUEUE_SetWakeBit( queue, QS_SENDMESSAGE );
773 WARN(sendmsg, "Invalid list: %d", list);
781 /***********************************************************************
784 * This routine is called when a SMSG need to be remove from one of the three
785 * SM list. (SM_PROCESSING_LIST, SM_PENDING_LIST, SM_WAITING_LIST)
786 * If smsg == 0, remove the first smsg from the specified list
788 SMSG *QUEUE_RemoveSMSG( MESSAGEQUEUE *queue, int list, SMSG *smsg )
793 case SM_PROCESSING_LIST:
794 /* don't need to be thread safe, only accessed by the
795 thread associated with the sender queue */
797 /* if smsg is equal to null, it means the first in the list */
799 smsg = queue->smProcessing;
801 TRACE(sendmsg,"queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
802 smsg, SPY_GetMsgName(smsg->msg));
803 /* In fact SM_PROCESSING_LIST is a stack, and smsg
804 should be always at the top of the list */
805 if ( (smsg != queue->smProcessing) || !queue->smProcessing )
807 ERR( sendmsg, "smsg not at the top of Processing list, smsg=0x%p queue=0x%p", smsg, queue);
812 queue->smProcessing = smsg->nextProcessing;
813 smsg->nextProcessing = 0;
817 case SM_WAITING_LIST:
818 /* don't need to be thread safe, only accessed by the
819 thread associated with the receiver queue */
821 /* if smsg is equal to null, it means the first in the list */
823 smsg = queue->smWaiting;
825 TRACE(sendmsg,"queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
826 smsg, SPY_GetMsgName(smsg->msg));
827 /* In fact SM_WAITING_LIST is a stack, and smsg
828 should be always at the top of the list */
829 if ( (smsg != queue->smWaiting) || !queue->smWaiting )
831 ERR( sendmsg, "smsg not at the top of Waiting list, smsg=0x%p queue=0x%p", smsg, queue);
836 queue->smWaiting = smsg->nextWaiting;
837 smsg->nextWaiting = 0;
841 case SM_PENDING_LIST:
842 /* make it thread safe, could be accessed by the sender and
844 EnterCriticalSection( &queue->cSection );
846 if (!smsg || !queue->smPending)
847 smsg = queue->smPending;
850 ERR( sendmsg, "should always remove the top one in Pending list, smsg=0x%p queue=0x%p", smsg, queue);
854 TRACE(sendmsg,"queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
855 smsg, SPY_GetMsgName(smsg->msg));
857 queue->smPending = smsg->nextPending;
858 smsg->nextPending = 0;
860 /* if no more SMSG in Pending list, clear QS_SENDMESSAGE flag */
861 if (!queue->smPending)
862 QUEUE_ClearWakeBit( queue, QS_SENDMESSAGE );
864 LeaveCriticalSection( &queue->cSection );
868 WARN(sendmsg, "Invalid list: %d", list);
876 /***********************************************************************
877 * QUEUE_ReceiveMessage
879 * This routine is called when a sent message is waiting for the queue.
881 void QUEUE_ReceiveMessage( MESSAGEQUEUE *queue )
885 MESSAGEQUEUE *senderQ;
887 TRACE(sendmsg, "queue %04x\n", queue->self );
889 if ( !(queue->wakeBits & QS_SENDMESSAGE) && queue->smPending )
891 TRACE(sendmsg,"\trcm: nothing to do\n");
895 /* remove smsg on the top of the pending list and put it in the processing list */
896 smsg = QUEUE_RemoveSMSG(queue, SM_PENDING_LIST, 0);
897 QUEUE_AddSMSG(queue, SM_WAITING_LIST, smsg);
899 TRACE(sendmsg,"RM: %s [%04x] (%04x -> %04x)\n",
900 SPY_GetMsgName(smsg->msg), smsg->msg, smsg->hSrcQueue, smsg->hDstQueue );
902 if (IsWindow( smsg->hWnd ))
904 WND *wndPtr = WIN_FindWndPtr( smsg->hWnd );
905 DWORD extraInfo = queue->GetMessageExtraInfoVal; /* save ExtraInfo */
907 /* use sender queue extra info value while calling the window proc */
908 senderQ = (MESSAGEQUEUE*)QUEUE_Lock( smsg->hSrcQueue );
911 queue->GetMessageExtraInfoVal = senderQ->GetMessageExtraInfoVal;
912 QUEUE_Unlock( senderQ );
915 /* call the right version of CallWindowProcXX */
916 if (smsg->flags & SMSG_WIN32)
918 TRACE(sendmsg, "\trcm: msg is Win32\n" );
919 if (smsg->flags & SMSG_UNICODE)
920 result = CallWindowProcW( wndPtr->winproc,
921 smsg->hWnd, smsg->msg,
922 smsg->wParam, smsg->lParam );
924 result = CallWindowProcA( wndPtr->winproc,
925 smsg->hWnd, smsg->msg,
926 smsg->wParam, smsg->lParam );
928 else /* Win16 message */
929 result = CallWindowProc16( (WNDPROC16)wndPtr->winproc,
932 LOWORD (smsg->wParam),
935 queue->GetMessageExtraInfoVal = extraInfo; /* Restore extra info */
936 WIN_ReleaseWndPtr(wndPtr);
937 TRACE(sendmsg,"result = %08x\n", (unsigned)result );
939 else WARN(sendmsg, "\trcm: bad hWnd\n");
942 /* set SMSG_SENDING_REPLY flag to tell ReplyMessage16, it's not
944 smsg->flags |= SMSG_SENDING_REPLY;
945 ReplyMessage( result );
947 TRACE( sendmsg,"done! \n" );
952 /***********************************************************************
955 * Add a message to the queue. Return FALSE if queue is full.
957 BOOL QUEUE_AddMsg( HQUEUE16 hQueue, MSG *msg, DWORD extraInfo )
959 MESSAGEQUEUE *msgQueue;
963 if (!(msgQueue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return FALSE;
965 /* allocate new message in global heap for now */
966 if (!(qmsg = (QMSG *) HeapAlloc( SystemHeap, 0, sizeof(QMSG) ) ))
968 QUEUE_Unlock( msgQueue );
972 EnterCriticalSection( &msgQueue->cSection );
976 qmsg->extraInfo = extraInfo;
978 /* insert the message in the link list */
980 qmsg->prevMsg = msgQueue->lastMsg;
982 if (msgQueue->lastMsg)
983 msgQueue->lastMsg->nextMsg = qmsg;
985 /* update first and last anchor in message queue */
986 msgQueue->lastMsg = qmsg;
987 if (!msgQueue->firstMsg)
988 msgQueue->firstMsg = qmsg;
990 msgQueue->msgCount++;
992 LeaveCriticalSection( &msgQueue->cSection );
994 QUEUE_SetWakeBit( msgQueue, QS_POSTMESSAGE );
995 QUEUE_Unlock( msgQueue );
1002 /***********************************************************************
1005 * Find a message matching the given parameters. Return -1 if none available.
1007 QMSG* QUEUE_FindMsg( MESSAGEQUEUE * msgQueue, HWND hwnd, int first, int last )
1011 EnterCriticalSection( &msgQueue->cSection );
1013 if (!msgQueue->msgCount)
1015 else if (!hwnd && !first && !last)
1016 qmsg = msgQueue->firstMsg;
1019 /* look in linked list for message matching first and last criteria */
1020 for (qmsg = msgQueue->firstMsg; qmsg; qmsg = qmsg->nextMsg)
1022 MSG *msg = &(qmsg->msg);
1024 if (!hwnd || (msg->hwnd == hwnd))
1026 if (!first && !last)
1027 break; /* found it */
1029 if ((msg->message >= first) && (!last || (msg->message <= last)))
1030 break; /* found it */
1035 LeaveCriticalSection( &msgQueue->cSection );
1042 /***********************************************************************
1045 * Remove a message from the queue (pos must be a valid position).
1047 void QUEUE_RemoveMsg( MESSAGEQUEUE * msgQueue, QMSG *qmsg )
1049 EnterCriticalSection( &msgQueue->cSection );
1051 /* set the linked list */
1053 qmsg->prevMsg->nextMsg = qmsg->nextMsg;
1056 qmsg->nextMsg->prevMsg = qmsg->prevMsg;
1058 if (msgQueue->firstMsg == qmsg)
1059 msgQueue->firstMsg = qmsg->nextMsg;
1061 if (msgQueue->lastMsg == qmsg)
1062 msgQueue->lastMsg = qmsg->prevMsg;
1064 /* deallocate the memory for the message */
1065 HeapFree( SystemHeap, 0, qmsg );
1067 msgQueue->msgCount--;
1068 if (!msgQueue->msgCount) msgQueue->wakeBits &= ~QS_POSTMESSAGE;
1070 LeaveCriticalSection( &msgQueue->cSection );
1074 /***********************************************************************
1077 * Wake a queue upon reception of a hardware event.
1079 static void QUEUE_WakeSomeone( UINT message )
1084 HQUEUE16 hQueue = 0;
1085 MESSAGEQUEUE *queue = NULL;
1088 hQueue = hCursorQueue;
1090 if( (message >= WM_KEYFIRST) && (message <= WM_KEYLAST) )
1094 hQueue = hActiveQueue;
1098 wakeBit = (message == WM_MOUSEMOVE) ? QS_MOUSEMOVE : QS_MOUSEBUTTON;
1099 if( (hwnd = GetCapture()) )
1100 if( (wndPtr = WIN_FindWndPtr( hwnd )) )
1102 hQueue = wndPtr->hmemTaskQ;
1103 WIN_ReleaseWndPtr(wndPtr);
1107 if( (hwnd = GetSysModalWindow16()) )
1109 if( (wndPtr = WIN_FindWndPtr( hwnd )) )
1111 hQueue = wndPtr->hmemTaskQ;
1112 WIN_ReleaseWndPtr(wndPtr);
1117 queue = QUEUE_Lock( hQueue );
1121 queue = QUEUE_Lock( hFirstQueue );
1124 if (queue->wakeMask & wakeBit) break;
1126 QUEUE_Unlock(queue);
1127 queue = QUEUE_Lock( queue->next );
1131 WARN(msg, "couldn't find queue\n");
1136 QUEUE_SetWakeBit( queue, wakeBit );
1138 QUEUE_Unlock( queue );
1142 /***********************************************************************
1145 * Add an event to the system message queue.
1146 * Note: the position is relative to the desktop window.
1148 void hardware_event( WORD message, WORD wParam, LONG lParam,
1149 int xPos, int yPos, DWORD time, DWORD extraInfo )
1155 if (!sysMsgQueue) return;
1157 EnterCriticalSection( &sysMsgQueue->cSection );
1159 /* Merge with previous event if possible */
1160 qmsg = sysMsgQueue->lastMsg;
1162 if ((message == WM_MOUSEMOVE) && sysMsgQueue->lastMsg)
1164 msg = &(sysMsgQueue->lastMsg->msg);
1166 if ((msg->message == message) && (msg->wParam == wParam))
1169 qmsg = sysMsgQueue->lastMsg;
1176 /* Should I limit the number of message in
1177 the system message queue??? */
1179 /* Don't merge allocate a new msg in the global heap */
1181 if (!(qmsg = (QMSG *) HeapAlloc( SystemHeap, 0, sizeof(QMSG) ) ))
1183 LeaveCriticalSection( &sysMsgQueue->cSection );
1187 /* put message at the end of the linked list */
1189 qmsg->prevMsg = sysMsgQueue->lastMsg;
1191 if (sysMsgQueue->lastMsg)
1192 sysMsgQueue->lastMsg->nextMsg = qmsg;
1194 /* set last and first anchor index in system message queue */
1195 sysMsgQueue->lastMsg = qmsg;
1196 if (!sysMsgQueue->firstMsg)
1197 sysMsgQueue->firstMsg = qmsg;
1199 sysMsgQueue->msgCount++;
1205 msg->message = message;
1206 msg->wParam = wParam;
1207 msg->lParam = lParam;
1211 qmsg->extraInfo = extraInfo;
1213 LeaveCriticalSection( &sysMsgQueue->cSection );
1215 QUEUE_WakeSomeone( message );
1219 /***********************************************************************
1220 * QUEUE_GetQueueTask
1222 HTASK16 QUEUE_GetQueueTask( HQUEUE16 hQueue )
1226 MESSAGEQUEUE *queue = QUEUE_Lock( hQueue );
1230 hTask = queue->thdb->process->task;
1231 QUEUE_Unlock( queue );
1239 /***********************************************************************
1240 * QUEUE_IncPaintCount
1242 void QUEUE_IncPaintCount( HQUEUE16 hQueue )
1244 MESSAGEQUEUE *queue;
1246 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1247 queue->wPaintCount++;
1248 QUEUE_SetWakeBit( queue, QS_PAINT );
1249 QUEUE_Unlock( queue );
1253 /***********************************************************************
1254 * QUEUE_DecPaintCount
1256 void QUEUE_DecPaintCount( HQUEUE16 hQueue )
1258 MESSAGEQUEUE *queue;
1260 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1261 queue->wPaintCount--;
1262 if (!queue->wPaintCount) queue->wakeBits &= ~QS_PAINT;
1263 QUEUE_Unlock( queue );
1267 /***********************************************************************
1268 * QUEUE_IncTimerCount
1270 void QUEUE_IncTimerCount( HQUEUE16 hQueue )
1272 MESSAGEQUEUE *queue;
1274 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1275 queue->wTimerCount++;
1276 QUEUE_SetWakeBit( queue, QS_TIMER );
1277 QUEUE_Unlock( queue );
1281 /***********************************************************************
1282 * QUEUE_DecTimerCount
1284 void QUEUE_DecTimerCount( HQUEUE16 hQueue )
1286 MESSAGEQUEUE *queue;
1288 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1289 queue->wTimerCount--;
1290 if (!queue->wTimerCount) queue->wakeBits &= ~QS_TIMER;
1291 QUEUE_Unlock( queue );
1295 /***********************************************************************
1296 * PostQuitMessage16 (USER.6)
1298 void WINAPI PostQuitMessage16( INT16 exitCode )
1300 PostQuitMessage( exitCode );
1304 /***********************************************************************
1305 * PostQuitMessage32 (USER32.421)
1307 * PostQuitMessage() posts a message to the system requesting an
1308 * application to terminate execution. As a result of this function,
1309 * the WM_QUIT message is posted to the application, and
1310 * PostQuitMessage() returns immediately. The exitCode parameter
1311 * specifies an application-defined exit code, which appears in the
1312 * _wParam_ parameter of the WM_QUIT message posted to the application.
1318 void WINAPI PostQuitMessage( INT exitCode )
1320 MESSAGEQUEUE *queue;
1322 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return;
1323 queue->wPostQMsg = TRUE;
1324 queue->wExitCode = (WORD)exitCode;
1325 QUEUE_Unlock( queue );
1329 /***********************************************************************
1330 * GetWindowTask16 (USER.224)
1332 HTASK16 WINAPI GetWindowTask16( HWND16 hwnd )
1335 WND *wndPtr = WIN_FindWndPtr( hwnd );
1337 if (!wndPtr) return 0;
1338 retvalue = QUEUE_GetQueueTask( wndPtr->hmemTaskQ );
1339 WIN_ReleaseWndPtr(wndPtr);
1343 /***********************************************************************
1344 * GetWindowThreadProcessId (USER32.313)
1346 DWORD WINAPI GetWindowThreadProcessId( HWND hwnd, LPDWORD process )
1351 WND *wndPtr = WIN_FindWndPtr( hwnd );
1353 if (!wndPtr) return 0;
1354 htask=QUEUE_GetQueueTask( wndPtr->hmemTaskQ );
1355 WIN_ReleaseWndPtr(wndPtr);
1356 tdb = (TDB*)GlobalLock16(htask);
1357 if (!tdb || !tdb->thdb) return 0;
1358 if (process) *process = (DWORD)tdb->thdb->process->server_pid;
1359 return (DWORD)tdb->thdb->server_tid;
1363 /***********************************************************************
1364 * SetMessageQueue16 (USER.266)
1366 BOOL16 WINAPI SetMessageQueue16( INT16 size )
1368 return SetMessageQueue( size );
1372 /***********************************************************************
1373 * SetMessageQueue32 (USER32.494)
1375 BOOL WINAPI SetMessageQueue( INT size )
1377 /* now obsolete the message queue will be expanded dynamically
1380 /* access the queue to create it if it's not existing */
1386 /***********************************************************************
1387 * InitThreadInput (USER.409)
1389 HQUEUE16 WINAPI InitThreadInput16( WORD unknown, WORD flags )
1392 MESSAGEQUEUE *queuePtr;
1394 THDB *thdb = THREAD_Current();
1399 hQueue = thdb->teb.queue;
1403 /* Create thread message queue */
1404 if( !(hQueue = QUEUE_CreateMsgQueue( TRUE )))
1406 WARN(msg, "failed!\n");
1410 /* Link new queue into list */
1411 queuePtr = (MESSAGEQUEUE *)QUEUE_Lock( hQueue );
1412 queuePtr->thdb = THREAD_Current();
1414 HeapLock( SystemHeap ); /* FIXME: a bit overkill */
1415 SetThreadQueue16( 0, hQueue );
1416 thdb->teb.queue = hQueue;
1418 queuePtr->next = hFirstQueue;
1419 hFirstQueue = hQueue;
1420 HeapUnlock( SystemHeap );
1422 QUEUE_Unlock( queuePtr );
1428 /***********************************************************************
1429 * GetQueueStatus16 (USER.334)
1431 DWORD WINAPI GetQueueStatus16( UINT16 flags )
1433 MESSAGEQUEUE *queue;
1436 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1437 ret = MAKELONG( queue->changeBits, queue->wakeBits );
1438 queue->changeBits = 0;
1439 QUEUE_Unlock( queue );
1441 return ret & MAKELONG( flags, flags );
1444 /***********************************************************************
1445 * GetQueueStatus32 (USER32.283)
1447 DWORD WINAPI GetQueueStatus( UINT flags )
1449 MESSAGEQUEUE *queue;
1452 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1453 ret = MAKELONG( queue->changeBits, queue->wakeBits );
1454 queue->changeBits = 0;
1455 QUEUE_Unlock( queue );
1457 return ret & MAKELONG( flags, flags );
1461 /***********************************************************************
1462 * GetInputState16 (USER.335)
1464 BOOL16 WINAPI GetInputState16(void)
1466 return GetInputState();
1469 /***********************************************************************
1470 * WaitForInputIdle (USER32.577)
1472 DWORD WINAPI WaitForInputIdle (HANDLE hProcess, DWORD dwTimeOut)
1474 FIXME (msg, "(hProcess=%d, dwTimeOut=%ld): stub\n", hProcess, dwTimeOut);
1476 return WAIT_TIMEOUT;
1480 /***********************************************************************
1481 * GetInputState32 (USER32.244)
1483 BOOL WINAPI GetInputState(void)
1485 MESSAGEQUEUE *queue;
1488 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() )))
1490 ret = queue->wakeBits & (QS_KEY | QS_MOUSEBUTTON);
1491 QUEUE_Unlock( queue );
1496 /***********************************************************************
1497 * UserYield (USER.332)
1499 void WINAPI UserYield16(void)
1501 MESSAGEQUEUE *queue;
1503 /* Handle sent messages */
1504 queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() );
1506 while (queue && (queue->wakeBits & QS_SENDMESSAGE))
1507 QUEUE_ReceiveMessage( queue );
1509 QUEUE_Unlock( queue );
1512 if ( THREAD_IsWin16( THREAD_Current() ) )
1518 ReleaseThunkLock(&count);
1519 RestoreThunkLock(count);
1522 /* Handle sent messages again */
1523 queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() );
1525 while (queue && (queue->wakeBits & QS_SENDMESSAGE))
1526 QUEUE_ReceiveMessage( queue );
1528 QUEUE_Unlock( queue );
1531 /***********************************************************************
1532 * GetMessagePos (USER.119) (USER32.272)
1534 * The GetMessagePos() function returns a long value representing a
1535 * cursor position, in screen coordinates, when the last message
1536 * retrieved by the GetMessage() function occurs. The x-coordinate is
1537 * in the low-order word of the return value, the y-coordinate is in
1538 * the high-order word. The application can use the MAKEPOINT()
1539 * macro to obtain a POINT structure from the return value.
1541 * For the current cursor position, use GetCursorPos().
1545 * Cursor position of last message on success, zero on failure.
1552 DWORD WINAPI GetMessagePos(void)
1554 MESSAGEQUEUE *queue;
1557 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1558 ret = queue->GetMessagePosVal;
1559 QUEUE_Unlock( queue );
1565 /***********************************************************************
1566 * GetMessageTime (USER.120) (USER32.273)
1568 * GetMessageTime() returns the message time for the last message
1569 * retrieved by the function. The time is measured in milliseconds with
1570 * the same offset as GetTickCount().
1572 * Since the tick count wraps, this is only useful for moderately short
1573 * relative time comparisons.
1577 * Time of last message on success, zero on failure.
1584 LONG WINAPI GetMessageTime(void)
1586 MESSAGEQUEUE *queue;
1589 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1590 ret = queue->GetMessageTimeVal;
1591 QUEUE_Unlock( queue );
1597 /***********************************************************************
1598 * GetMessageExtraInfo (USER.288) (USER32.271)
1600 LONG WINAPI GetMessageExtraInfo(void)
1602 MESSAGEQUEUE *queue;
1605 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1606 ret = queue->GetMessageExtraInfoVal;
1607 QUEUE_Unlock( queue );