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 #define MAX_QUEUE_SIZE 120 /* Max. size of a message queue */
26 static HQUEUE16 hFirstQueue = 0;
27 static HQUEUE16 hExitingQueue = 0;
28 static HQUEUE16 hmemSysMsgQueue = 0;
29 static MESSAGEQUEUE *sysMsgQueue = NULL;
30 static PERQUEUEDATA *pQDataWin16 = NULL; /* Global perQData for Win16 tasks */
32 static MESSAGEQUEUE *pMouseQueue = NULL; /* Queue for last mouse message */
33 static MESSAGEQUEUE *pKbdQueue = NULL; /* Queue for last kbd message */
35 HQUEUE16 hCursorQueue = 0;
36 HQUEUE16 hActiveQueue = 0;
39 /***********************************************************************
40 * PERQDATA_CreateInstance
42 * Creates an instance of a reference counted PERQUEUEDATA element
43 * for the message queue. perQData is stored globally for 16 bit tasks.
45 * Note: We don't implement perQdata exactly the same way Windows does.
46 * Each perQData element is reference counted since it may be potentially
47 * shared by multiple message Queues (via AttachThreadInput).
48 * We only store the current values for Active, Capture and focus windows
51 PERQUEUEDATA * PERQDATA_CreateInstance( )
59 /* Share a single instance of perQData for all 16 bit tasks */
60 if ( ( bIsWin16 = THREAD_IsWin16( THREAD_Current() ) ) )
62 /* If previously allocated, just bump up ref count */
65 PERQDATA_Addref( pQDataWin16 );
70 /* Allocate PERQUEUEDATA from the system heap */
71 if (!( pQData = (PERQUEUEDATA *) HeapAlloc( SystemHeap, 0,
72 sizeof(PERQUEUEDATA) ) ))
76 pQData->hWndCapture = pQData->hWndFocus = pQData->hWndActive = 0;
77 pQData->ulRefCount = 1;
78 pQData->nCaptureHT = HTCLIENT;
80 /* Note: We have an independent critical section for the per queue data
81 * since this may be shared by different threads. see AttachThreadInput()
83 InitializeCriticalSection( &pQData->cSection );
85 /* Save perQData globally for 16 bit tasks */
93 /***********************************************************************
96 * Increment reference count for the PERQUEUEDATA instance
97 * Returns reference count for debugging purposes
99 ULONG PERQDATA_Addref( PERQUEUEDATA *pQData )
101 assert(pQData != 0 );
102 TRACE(msg,"(): current refcount %lu ...\n", pQData->ulRefCount);
104 EnterCriticalSection( &pQData->cSection );
105 ++pQData->ulRefCount;
106 LeaveCriticalSection( &pQData->cSection );
108 return pQData->ulRefCount;
112 /***********************************************************************
115 * Release a reference to a PERQUEUEDATA instance.
116 * Destroy the instance if no more references exist
117 * Returns reference count for debugging purposes
119 ULONG PERQDATA_Release( PERQUEUEDATA *pQData )
121 assert(pQData != 0 );
122 TRACE(msg,"(): current refcount %lu ...\n",
123 (LONG)pQData->ulRefCount );
125 EnterCriticalSection( &pQData->cSection );
126 if ( --pQData->ulRefCount == 0 )
128 LeaveCriticalSection( &pQData->cSection );
129 DeleteCriticalSection( &pQData->cSection );
131 TRACE(msg,"(): deleting PERQUEUEDATA instance ...\n" );
133 /* Deleting our global 16 bit perQData? */
134 if ( pQData == pQDataWin16 )
137 /* Free the PERQUEUEDATA instance */
138 HeapFree( SystemHeap, 0, pQData );
142 LeaveCriticalSection( &pQData->cSection );
144 return pQData->ulRefCount;
148 /***********************************************************************
149 * PERQDATA_GetFocusWnd
151 * Get the focus hwnd member in a threadsafe manner
153 HWND PERQDATA_GetFocusWnd( PERQUEUEDATA *pQData )
156 assert(pQData != 0 );
158 EnterCriticalSection( &pQData->cSection );
159 hWndFocus = pQData->hWndFocus;
160 LeaveCriticalSection( &pQData->cSection );
166 /***********************************************************************
167 * PERQDATA_SetFocusWnd
169 * Set the focus hwnd member in a threadsafe manner
171 HWND PERQDATA_SetFocusWnd( PERQUEUEDATA *pQData, HWND hWndFocus )
174 assert(pQData != 0 );
176 EnterCriticalSection( &pQData->cSection );
177 hWndFocusPrv = pQData->hWndFocus;
178 pQData->hWndFocus = hWndFocus;
179 LeaveCriticalSection( &pQData->cSection );
185 /***********************************************************************
186 * PERQDATA_GetActiveWnd
188 * Get the active hwnd member in a threadsafe manner
190 HWND PERQDATA_GetActiveWnd( PERQUEUEDATA *pQData )
193 assert(pQData != 0 );
195 EnterCriticalSection( &pQData->cSection );
196 hWndActive = pQData->hWndActive;
197 LeaveCriticalSection( &pQData->cSection );
203 /***********************************************************************
204 * PERQDATA_SetActiveWnd
206 * Set the active focus hwnd member in a threadsafe manner
208 HWND PERQDATA_SetActiveWnd( PERQUEUEDATA *pQData, HWND hWndActive )
211 assert(pQData != 0 );
213 EnterCriticalSection( &pQData->cSection );
214 hWndActivePrv = pQData->hWndActive;
215 pQData->hWndActive = hWndActive;
216 LeaveCriticalSection( &pQData->cSection );
218 return hWndActivePrv;
222 /***********************************************************************
223 * PERQDATA_GetCaptureWnd
225 * Get the capture hwnd member in a threadsafe manner
227 HWND PERQDATA_GetCaptureWnd( PERQUEUEDATA *pQData )
230 assert(pQData != 0 );
232 EnterCriticalSection( &pQData->cSection );
233 hWndCapture = pQData->hWndCapture;
234 LeaveCriticalSection( &pQData->cSection );
240 /***********************************************************************
241 * PERQDATA_SetCaptureWnd
243 * Set the capture hwnd member in a threadsafe manner
245 HWND PERQDATA_SetCaptureWnd( PERQUEUEDATA *pQData, HWND hWndCapture )
248 assert(pQData != 0 );
250 EnterCriticalSection( &pQData->cSection );
251 hWndCapturePrv = pQData->hWndCapture;
252 pQData->hWndCapture = hWndCapture;
253 LeaveCriticalSection( &pQData->cSection );
255 return hWndCapturePrv;
259 /***********************************************************************
260 * PERQDATA_GetCaptureInfo
262 * Get the capture info member in a threadsafe manner
264 INT16 PERQDATA_GetCaptureInfo( PERQUEUEDATA *pQData )
267 assert(pQData != 0 );
269 EnterCriticalSection( &pQData->cSection );
270 nCaptureHT = pQData->nCaptureHT;
271 LeaveCriticalSection( &pQData->cSection );
277 /***********************************************************************
278 * PERQDATA_SetCaptureInfo
280 * Set the capture info member in a threadsafe manner
282 INT16 PERQDATA_SetCaptureInfo( PERQUEUEDATA *pQData, INT16 nCaptureHT )
285 assert(pQData != 0 );
287 EnterCriticalSection( &pQData->cSection );
288 nCaptureHTPrv = pQData->nCaptureHT;
289 pQData->nCaptureHT = nCaptureHT;
290 LeaveCriticalSection( &pQData->cSection );
292 return nCaptureHTPrv;
296 /***********************************************************************
299 * Function for getting a 32 bit pointer on queue strcture. For thread
300 * safeness programmers should use this function instead of GlobalLock to
301 * retrieve a pointer on the structure. QUEUE_Unlock should also be called
302 * when access to the queue structure is not required anymore.
304 MESSAGEQUEUE *QUEUE_Lock( HQUEUE16 hQueue )
309 queue = GlobalLock16( hQueue );
310 if ( !queue || (queue->magic != QUEUE_MAGIC) )
323 /***********************************************************************
326 * Use with QUEUE_Lock to get a thread safe acces to message queue
329 void QUEUE_Unlock( MESSAGEQUEUE *queue )
335 if ( --queue->lockCount == 0 )
337 DeleteCriticalSection ( &queue->cSection );
339 CloseHandle( queue->hEvent );
340 GlobalFree16( queue->self );
348 /***********************************************************************
351 void QUEUE_DumpQueue( HQUEUE16 hQueue )
355 if (!(pq = (MESSAGEQUEUE*) QUEUE_Lock( hQueue )) )
357 WARN(msg, "%04x is not a queue handle\n", hQueue );
361 DUMP( "next: %12.4x Intertask SendMessage:\n"
362 "thread: %10p ----------------------\n"
363 "firstMsg: %8p smWaiting: %10p\n"
364 "lastMsg: %8p smPending: %10p\n"
365 "msgCount: %8.4x smProcessing: %10p\n"
373 pq->next, pq->thdb, pq->firstMsg, pq->smWaiting, pq->lastMsg,
374 pq->smPending, pq->msgCount, pq->smProcessing,
375 (unsigned)pq->lockCount, pq->wWinVersion,
376 pq->wPaintCount, pq->wTimerCount,
377 pq->wakeBits, pq->wakeMask, pq->hCurHook);
383 /***********************************************************************
386 void QUEUE_WalkQueues(void)
389 HQUEUE16 hQueue = hFirstQueue;
391 DUMP( "Queue Msgs Thread Task Module\n" );
394 MESSAGEQUEUE *queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue );
397 WARN( msg, "Bad queue handle %04x\n", hQueue );
400 if (!GetModuleName16( queue->thdb->process->task, module, sizeof(module )))
401 strcpy( module, "???" );
402 DUMP( "%04x %4d %p %04x %s\n", hQueue,queue->msgCount,
403 queue->thdb, queue->thdb->process->task, module );
404 hQueue = queue->next;
405 QUEUE_Unlock( queue );
411 /***********************************************************************
412 * QUEUE_IsExitingQueue
414 BOOL QUEUE_IsExitingQueue( HQUEUE16 hQueue )
416 return (hExitingQueue && (hQueue == hExitingQueue));
420 /***********************************************************************
421 * QUEUE_SetExitingQueue
423 void QUEUE_SetExitingQueue( HQUEUE16 hQueue )
425 hExitingQueue = hQueue;
429 /***********************************************************************
430 * QUEUE_CreateMsgQueue
432 * Creates a message queue. Doesn't link it into queue list!
434 static HQUEUE16 QUEUE_CreateMsgQueue( BOOL16 bCreatePerQData )
437 MESSAGEQUEUE * msgQueue;
438 TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
440 TRACE(msg,"(): Creating message queue...\n");
442 if (!(hQueue = GlobalAlloc16( GMEM_FIXED | GMEM_ZEROINIT,
443 sizeof(MESSAGEQUEUE) )))
446 msgQueue = (MESSAGEQUEUE *) GlobalLock16( hQueue );
450 msgQueue->self = hQueue;
451 msgQueue->wakeBits = msgQueue->changeBits = 0;
452 msgQueue->wWinVersion = pTask ? pTask->version : 0;
454 InitializeCriticalSection( &msgQueue->cSection );
455 MakeCriticalSectionGlobal( &msgQueue->cSection );
457 /* Create an Event object for waiting on message, used by win32 thread
459 if ( !THREAD_IsWin16( THREAD_Current() ) )
461 msgQueue->hEvent = CreateEventA( NULL, FALSE, FALSE, NULL);
463 if (msgQueue->hEvent == 0)
465 WARN(msg, "CreateEvent32A is not able to create an event object");
468 msgQueue->hEvent = ConvertToGlobalHandle( msgQueue->hEvent );
471 msgQueue->hEvent = 0;
473 msgQueue->lockCount = 1;
474 msgQueue->magic = QUEUE_MAGIC;
476 /* Create and initialize our per queue data */
477 msgQueue->pQData = bCreatePerQData ? PERQDATA_CreateInstance() : NULL;
483 /***********************************************************************
486 * Try to reply to all pending sent messages on exit.
488 void QUEUE_FlushMessages( MESSAGEQUEUE *queue )
491 MESSAGEQUEUE *senderQ = 0;
495 EnterCriticalSection( &queue->cSection );
497 /* empty the list of pending SendMessage waiting to be received */
498 while (queue->smPending)
500 smsg = QUEUE_RemoveSMSG( queue, SM_PENDING_LIST, 0);
502 senderQ = (MESSAGEQUEUE*)QUEUE_Lock( smsg->hSrcQueue );
506 /* return 0, to unblock other thread */
508 smsg->flags |= SMSG_HAVE_RESULT;
509 QUEUE_SetWakeBit( senderQ, QS_SMRESULT);
511 QUEUE_Unlock( senderQ );
514 QUEUE_ClearWakeBit( queue, QS_SENDMESSAGE );
516 LeaveCriticalSection( &queue->cSection );
521 /***********************************************************************
522 * QUEUE_DeleteMsgQueue
524 * Unlinks and deletes a message queue.
526 * Note: We need to mask asynchronous events to make sure PostMessage works
527 * even in the signal handler.
529 BOOL QUEUE_DeleteMsgQueue( HQUEUE16 hQueue )
531 MESSAGEQUEUE * msgQueue = (MESSAGEQUEUE*)QUEUE_Lock(hQueue);
534 TRACE(msg,"(): Deleting message queue %04x\n", hQueue);
536 if (!hQueue || !msgQueue)
538 WARN(msg, "invalid argument.\n");
544 if( hCursorQueue == hQueue ) hCursorQueue = 0;
545 if( hActiveQueue == hQueue ) hActiveQueue = 0;
547 /* flush sent messages */
548 QUEUE_FlushMessages( msgQueue );
552 /* Release per queue data if present */
553 if ( msgQueue->pQData )
555 PERQDATA_Release( msgQueue->pQData );
556 msgQueue->pQData = 0;
559 /* remove the message queue from the global link list */
560 pPrev = &hFirstQueue;
561 while (*pPrev && (*pPrev != hQueue))
563 MESSAGEQUEUE *msgQ = (MESSAGEQUEUE*)GlobalLock16(*pPrev);
566 if ( !msgQ || (msgQ->magic != QUEUE_MAGIC) )
568 /* HQUEUE link list is corrupted, try to exit gracefully */
569 WARN( msg, "HQUEUE link list corrupted!\n");
575 if (pPrev && *pPrev) *pPrev = msgQueue->next;
580 /* free up resource used by MESSAGEQUEUE strcture */
581 msgQueue->lockCount--;
582 QUEUE_Unlock( msgQueue );
588 /***********************************************************************
589 * QUEUE_CreateSysMsgQueue
591 * Create the system message queue, and set the double-click speed.
592 * Must be called only once.
594 BOOL QUEUE_CreateSysMsgQueue( int size )
596 /* Note: We dont need perQ data for the system message queue */
597 if (!(hmemSysMsgQueue = QUEUE_CreateMsgQueue( FALSE )))
600 sysMsgQueue = (MESSAGEQUEUE *) GlobalLock16( hmemSysMsgQueue );
605 /***********************************************************************
608 MESSAGEQUEUE *QUEUE_GetSysQueue(void)
614 /***********************************************************************
617 * See "Windows Internals", p.449
619 void QUEUE_SetWakeBit( MESSAGEQUEUE *queue, WORD bit )
621 TRACE(msg,"queue = %04x (wm=%04x), bit = %04x\n",
622 queue->self, queue->wakeMask, bit );
624 if (bit & QS_MOUSE) pMouseQueue = queue;
625 if (bit & QS_KEY) pKbdQueue = queue;
626 queue->changeBits |= bit;
627 queue->wakeBits |= bit;
628 if (queue->wakeMask & bit)
632 /* Wake up thread waiting for message */
633 if ( THREAD_IsWin16( queue->thdb ) )
634 PostEvent16( queue->thdb->process->task );
637 SetEvent( queue->hEvent );
643 /***********************************************************************
646 void QUEUE_ClearWakeBit( MESSAGEQUEUE *queue, WORD bit )
648 queue->changeBits &= ~bit;
649 queue->wakeBits &= ~bit;
653 /***********************************************************************
656 * See "Windows Internals", p.447
659 * 0 if exit with timeout
662 int QUEUE_WaitBits( WORD bits, DWORD timeout )
667 TRACE(msg,"q %04x waiting for %04x\n", GetFastQueue16(), bits);
669 if ( THREAD_IsWin16( THREAD_Current() ) && (timeout != INFINITE) )
670 curTime = GetTickCount();
672 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
676 if (queue->changeBits & bits)
678 /* One of the bits is set; we can return */
680 QUEUE_Unlock( queue );
683 if (queue->wakeBits & QS_SENDMESSAGE)
685 /* Process the sent message immediately */
688 QUEUE_ReceiveMessage( queue );
689 continue; /* nested sm crux */
692 queue->wakeMask = bits | QS_SENDMESSAGE;
693 if(queue->changeBits & bits)
698 TRACE(msg,"%04x) wakeMask is %04x, waiting\n", queue->self, queue->wakeMask);
700 if ( !THREAD_IsWin16( THREAD_Current() ) )
702 /* win32 thread, use WaitForMultipleObjects */
703 MsgWaitForMultipleObjects( 0, NULL, FALSE, timeout, queue->wakeMask );
707 if ( timeout == INFINITE )
708 WaitEvent16( 0 ); /* win 16 thread, use WaitEvent */
711 /* check for timeout, then give control to other tasks */
712 if (GetTickCount() - curTime > timeout)
715 QUEUE_Unlock( queue );
716 return 0; /* exit with timeout */
725 /***********************************************************************
728 * This routine is called when a SMSG need to be added to one of the three
729 * SM list. (SM_PROCESSING_LIST, SM_PENDING_LIST, SM_WAITING_LIST)
731 BOOL QUEUE_AddSMSG( MESSAGEQUEUE *queue, int list, SMSG *smsg )
733 TRACE(sendmsg,"queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
734 smsg, SPY_GetMsgName(smsg->msg));
738 case SM_PROCESSING_LIST:
739 /* don't need to be thread safe, only accessed by the
740 thread associated with the sender queue */
741 smsg->nextProcessing = queue->smProcessing;
742 queue->smProcessing = smsg;
745 case SM_WAITING_LIST:
746 /* don't need to be thread safe, only accessed by the
747 thread associated with the receiver queue */
748 smsg->nextWaiting = queue->smWaiting;
749 queue->smWaiting = smsg;
752 case SM_PENDING_LIST:
753 /* make it thread safe, could be accessed by the sender and
756 EnterCriticalSection( &queue->cSection );
757 smsg->nextPending = queue->smPending;
758 queue->smPending = smsg;
759 QUEUE_SetWakeBit( queue, QS_SENDMESSAGE );
760 LeaveCriticalSection( &queue->cSection );
764 WARN(sendmsg, "Invalid list: %d", list);
772 /***********************************************************************
775 * This routine is called when a SMSG need to be remove from one of the three
776 * SM list. (SM_PROCESSING_LIST, SM_PENDING_LIST, SM_WAITING_LIST)
777 * If smsg == 0, remove the first smsg from the specified list
779 SMSG *QUEUE_RemoveSMSG( MESSAGEQUEUE *queue, int list, SMSG *smsg )
784 case SM_PROCESSING_LIST:
785 /* don't need to be thread safe, only accessed by the
786 thread associated with the sender queue */
788 /* if smsg is equal to null, it means the first in the list */
790 smsg = queue->smProcessing;
792 TRACE(sendmsg,"queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
793 smsg, SPY_GetMsgName(smsg->msg));
794 /* In fact SM_PROCESSING_LIST is a stack, and smsg
795 should be always at the top of the list */
796 if ( (smsg != queue->smProcessing) || !queue->smProcessing )
798 ERR( sendmsg, "smsg not at the top of Processing list, smsg=0x%p queue=0x%p", smsg, queue);
803 queue->smProcessing = smsg->nextProcessing;
804 smsg->nextProcessing = 0;
808 case SM_WAITING_LIST:
809 /* don't need to be thread safe, only accessed by the
810 thread associated with the receiver queue */
812 /* if smsg is equal to null, it means the first in the list */
814 smsg = queue->smWaiting;
816 TRACE(sendmsg,"queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
817 smsg, SPY_GetMsgName(smsg->msg));
818 /* In fact SM_WAITING_LIST is a stack, and smsg
819 should be always at the top of the list */
820 if ( (smsg != queue->smWaiting) || !queue->smWaiting )
822 ERR( sendmsg, "smsg not at the top of Waiting list, smsg=0x%p queue=0x%p", smsg, queue);
827 queue->smWaiting = smsg->nextWaiting;
828 smsg->nextWaiting = 0;
832 case SM_PENDING_LIST:
833 /* make it thread safe, could be accessed by the sender and
835 EnterCriticalSection( &queue->cSection );
837 if (!smsg || !queue->smPending)
838 smsg = queue->smPending;
841 ERR( sendmsg, "should always remove the top one in Pending list, smsg=0x%p queue=0x%p", smsg, queue);
845 TRACE(sendmsg,"queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
846 smsg, SPY_GetMsgName(smsg->msg));
848 queue->smPending = smsg->nextPending;
849 smsg->nextPending = 0;
851 /* if no more SMSG in Pending list, clear QS_SENDMESSAGE flag */
852 if (!queue->smPending)
853 QUEUE_ClearWakeBit( queue, QS_SENDMESSAGE );
855 LeaveCriticalSection( &queue->cSection );
859 WARN(sendmsg, "Invalid list: %d", list);
867 /***********************************************************************
868 * QUEUE_ReceiveMessage
870 * This routine is called when a sent message is waiting for the queue.
872 void QUEUE_ReceiveMessage( MESSAGEQUEUE *queue )
876 MESSAGEQUEUE *senderQ;
878 TRACE(sendmsg, "queue %04x\n", queue->self );
880 if ( !(queue->wakeBits & QS_SENDMESSAGE) && queue->smPending )
882 TRACE(sendmsg,"\trcm: nothing to do\n");
886 /* remove smsg on the top of the pending list and put it in the processing list */
887 smsg = QUEUE_RemoveSMSG(queue, SM_PENDING_LIST, 0);
888 QUEUE_AddSMSG(queue, SM_WAITING_LIST, smsg);
890 TRACE(sendmsg,"RM: %s [%04x] (%04x -> %04x)\n",
891 SPY_GetMsgName(smsg->msg), smsg->msg, smsg->hSrcQueue, smsg->hDstQueue );
893 if (IsWindow( smsg->hWnd ))
895 WND *wndPtr = WIN_FindWndPtr( smsg->hWnd );
896 DWORD extraInfo = queue->GetMessageExtraInfoVal; /* save ExtraInfo */
898 /* use sender queue extra info value while calling the window proc */
899 senderQ = (MESSAGEQUEUE*)QUEUE_Lock( smsg->hSrcQueue );
902 queue->GetMessageExtraInfoVal = senderQ->GetMessageExtraInfoVal;
903 QUEUE_Unlock( senderQ );
906 /* call the right version of CallWindowProcXX */
907 if (smsg->flags & SMSG_WIN32)
909 TRACE(sendmsg, "\trcm: msg is Win32\n" );
910 if (smsg->flags & SMSG_UNICODE)
911 result = CallWindowProcW( wndPtr->winproc,
912 smsg->hWnd, smsg->msg,
913 smsg->wParam, smsg->lParam );
915 result = CallWindowProcA( wndPtr->winproc,
916 smsg->hWnd, smsg->msg,
917 smsg->wParam, smsg->lParam );
919 else /* Win16 message */
920 result = CallWindowProc16( (WNDPROC16)wndPtr->winproc,
923 LOWORD (smsg->wParam),
926 queue->GetMessageExtraInfoVal = extraInfo; /* Restore extra info */
927 WIN_ReleaseWndPtr(wndPtr);
928 TRACE(sendmsg,"result = %08x\n", (unsigned)result );
930 else WARN(sendmsg, "\trcm: bad hWnd\n");
933 /* set SMSG_SENDING_REPLY flag to tell ReplyMessage16, it's not
935 smsg->flags |= SMSG_SENDING_REPLY;
936 ReplyMessage( result );
938 TRACE( sendmsg,"done! \n" );
943 /***********************************************************************
946 * Add a message to the queue. Return FALSE if queue is full.
948 BOOL QUEUE_AddMsg( HQUEUE16 hQueue, MSG *msg, DWORD extraInfo )
950 MESSAGEQUEUE *msgQueue;
954 if (!(msgQueue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return FALSE;
956 /* allocate new message in global heap for now */
957 if (!(qmsg = (QMSG *) HeapAlloc( SystemHeap, 0, sizeof(QMSG) ) ))
959 QUEUE_Unlock( msgQueue );
963 EnterCriticalSection( &msgQueue->cSection );
967 qmsg->extraInfo = extraInfo;
969 /* insert the message in the link list */
971 qmsg->prevMsg = msgQueue->lastMsg;
973 if (msgQueue->lastMsg)
974 msgQueue->lastMsg->nextMsg = qmsg;
976 /* update first and last anchor in message queue */
977 msgQueue->lastMsg = qmsg;
978 if (!msgQueue->firstMsg)
979 msgQueue->firstMsg = qmsg;
981 msgQueue->msgCount++;
983 LeaveCriticalSection( &msgQueue->cSection );
985 QUEUE_SetWakeBit( msgQueue, QS_POSTMESSAGE );
986 QUEUE_Unlock( msgQueue );
993 /***********************************************************************
996 * Find a message matching the given parameters. Return -1 if none available.
998 QMSG* QUEUE_FindMsg( MESSAGEQUEUE * msgQueue, HWND hwnd, int first, int last )
1002 EnterCriticalSection( &msgQueue->cSection );
1004 if (!msgQueue->msgCount)
1006 else if (!hwnd && !first && !last)
1007 qmsg = msgQueue->firstMsg;
1010 /* look in linked list for message matching first and last criteria */
1011 for (qmsg = msgQueue->firstMsg; qmsg; qmsg = qmsg->nextMsg)
1013 MSG *msg = &(qmsg->msg);
1015 if (!hwnd || (msg->hwnd == hwnd))
1017 if (!first && !last)
1018 break; /* found it */
1020 if ((msg->message >= first) && (!last || (msg->message <= last)))
1021 break; /* found it */
1026 LeaveCriticalSection( &msgQueue->cSection );
1033 /***********************************************************************
1036 * Remove a message from the queue (pos must be a valid position).
1038 void QUEUE_RemoveMsg( MESSAGEQUEUE * msgQueue, QMSG *qmsg )
1040 EnterCriticalSection( &msgQueue->cSection );
1042 /* set the linked list */
1044 qmsg->prevMsg->nextMsg = qmsg->nextMsg;
1047 qmsg->nextMsg->prevMsg = qmsg->prevMsg;
1049 if (msgQueue->firstMsg == qmsg)
1050 msgQueue->firstMsg = qmsg->nextMsg;
1052 if (msgQueue->lastMsg == qmsg)
1053 msgQueue->lastMsg = qmsg->prevMsg;
1055 /* deallocate the memory for the message */
1056 HeapFree( SystemHeap, 0, qmsg );
1058 msgQueue->msgCount--;
1059 if (!msgQueue->msgCount) msgQueue->wakeBits &= ~QS_POSTMESSAGE;
1061 LeaveCriticalSection( &msgQueue->cSection );
1065 /***********************************************************************
1068 * Wake a queue upon reception of a hardware event.
1070 static void QUEUE_WakeSomeone( UINT message )
1075 HQUEUE16 hQueue = 0;
1076 MESSAGEQUEUE *queue = NULL;
1079 hQueue = hCursorQueue;
1081 if( (message >= WM_KEYFIRST) && (message <= WM_KEYLAST) )
1085 hQueue = hActiveQueue;
1089 wakeBit = (message == WM_MOUSEMOVE) ? QS_MOUSEMOVE : QS_MOUSEBUTTON;
1090 if( (hwnd = GetCapture()) )
1091 if( (wndPtr = WIN_FindWndPtr( hwnd )) )
1093 hQueue = wndPtr->hmemTaskQ;
1094 WIN_ReleaseWndPtr(wndPtr);
1098 if( (hwnd = GetSysModalWindow16()) )
1100 if( (wndPtr = WIN_FindWndPtr( hwnd )) )
1102 hQueue = wndPtr->hmemTaskQ;
1103 WIN_ReleaseWndPtr(wndPtr);
1108 queue = QUEUE_Lock( hQueue );
1112 queue = QUEUE_Lock( hFirstQueue );
1115 if (queue->wakeMask & wakeBit) break;
1117 QUEUE_Unlock(queue);
1118 queue = QUEUE_Lock( queue->next );
1122 WARN(msg, "couldn't find queue\n");
1127 QUEUE_SetWakeBit( queue, wakeBit );
1129 QUEUE_Unlock( queue );
1133 /***********************************************************************
1136 * Add an event to the system message queue.
1137 * Note: the position is relative to the desktop window.
1139 void hardware_event( WORD message, WORD wParam, LONG lParam,
1140 int xPos, int yPos, DWORD time, DWORD extraInfo )
1143 QMSG *qmsg = sysMsgQueue->lastMsg;
1146 if (!sysMsgQueue) return;
1148 /* Merge with previous event if possible */
1150 if ((message == WM_MOUSEMOVE) && sysMsgQueue->lastMsg)
1152 msg = &(sysMsgQueue->lastMsg->msg);
1154 if ((msg->message == message) && (msg->wParam == wParam))
1157 qmsg = sysMsgQueue->lastMsg;
1164 /* Should I limit the number of message in
1165 the system message queue??? */
1167 /* Don't merge allocate a new msg in the global heap */
1169 if (!(qmsg = (QMSG *) HeapAlloc( SystemHeap, 0, sizeof(QMSG) ) ))
1172 /* put message at the end of the linked list */
1174 qmsg->prevMsg = sysMsgQueue->lastMsg;
1176 if (sysMsgQueue->lastMsg)
1177 sysMsgQueue->lastMsg->nextMsg = qmsg;
1179 /* set last and first anchor index in system message queue */
1180 sysMsgQueue->lastMsg = qmsg;
1181 if (!sysMsgQueue->firstMsg)
1182 sysMsgQueue->firstMsg = qmsg;
1184 sysMsgQueue->msgCount++;
1190 msg->message = message;
1191 msg->wParam = wParam;
1192 msg->lParam = lParam;
1196 qmsg->extraInfo = extraInfo;
1198 QUEUE_WakeSomeone( message );
1202 /***********************************************************************
1203 * QUEUE_GetQueueTask
1205 HTASK16 QUEUE_GetQueueTask( HQUEUE16 hQueue )
1209 MESSAGEQUEUE *queue = QUEUE_Lock( hQueue );
1213 hTask = queue->thdb->process->task;
1214 QUEUE_Unlock( queue );
1222 /***********************************************************************
1223 * QUEUE_IncPaintCount
1225 void QUEUE_IncPaintCount( HQUEUE16 hQueue )
1227 MESSAGEQUEUE *queue;
1229 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1230 queue->wPaintCount++;
1231 QUEUE_SetWakeBit( queue, QS_PAINT );
1232 QUEUE_Unlock( queue );
1236 /***********************************************************************
1237 * QUEUE_DecPaintCount
1239 void QUEUE_DecPaintCount( HQUEUE16 hQueue )
1241 MESSAGEQUEUE *queue;
1243 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1244 queue->wPaintCount--;
1245 if (!queue->wPaintCount) queue->wakeBits &= ~QS_PAINT;
1246 QUEUE_Unlock( queue );
1250 /***********************************************************************
1251 * QUEUE_IncTimerCount
1253 void QUEUE_IncTimerCount( HQUEUE16 hQueue )
1255 MESSAGEQUEUE *queue;
1257 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1258 queue->wTimerCount++;
1259 QUEUE_SetWakeBit( queue, QS_TIMER );
1260 QUEUE_Unlock( queue );
1264 /***********************************************************************
1265 * QUEUE_DecTimerCount
1267 void QUEUE_DecTimerCount( HQUEUE16 hQueue )
1269 MESSAGEQUEUE *queue;
1271 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1272 queue->wTimerCount--;
1273 if (!queue->wTimerCount) queue->wakeBits &= ~QS_TIMER;
1274 QUEUE_Unlock( queue );
1278 /***********************************************************************
1279 * PostQuitMessage16 (USER.6)
1281 void WINAPI PostQuitMessage16( INT16 exitCode )
1283 PostQuitMessage( exitCode );
1287 /***********************************************************************
1288 * PostQuitMessage32 (USER32.421)
1290 * PostQuitMessage() posts a message to the system requesting an
1291 * application to terminate execution. As a result of this function,
1292 * the WM_QUIT message is posted to the application, and
1293 * PostQuitMessage() returns immediately. The exitCode parameter
1294 * specifies an application-defined exit code, which appears in the
1295 * _wParam_ parameter of the WM_QUIT message posted to the application.
1301 void WINAPI PostQuitMessage( INT exitCode )
1303 MESSAGEQUEUE *queue;
1305 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return;
1306 queue->wPostQMsg = TRUE;
1307 queue->wExitCode = (WORD)exitCode;
1308 QUEUE_Unlock( queue );
1312 /***********************************************************************
1313 * GetWindowTask16 (USER.224)
1315 HTASK16 WINAPI GetWindowTask16( HWND16 hwnd )
1318 WND *wndPtr = WIN_FindWndPtr( hwnd );
1320 if (!wndPtr) return 0;
1321 retvalue = QUEUE_GetQueueTask( wndPtr->hmemTaskQ );
1322 WIN_ReleaseWndPtr(wndPtr);
1326 /***********************************************************************
1327 * GetWindowThreadProcessId (USER32.313)
1329 DWORD WINAPI GetWindowThreadProcessId( HWND hwnd, LPDWORD process )
1335 WND *wndPtr = WIN_FindWndPtr( hwnd );
1337 if (!wndPtr) return 0;
1338 htask=QUEUE_GetQueueTask( wndPtr->hmemTaskQ );
1339 WIN_ReleaseWndPtr(wndPtr);
1340 tdb = (TDB*)GlobalLock16(htask);
1341 if (!tdb || !tdb->thdb) return 0;
1342 if (process) *process = (DWORD)tdb->thdb->process->server_pid;
1343 return (DWORD)tdb->thdb->server_tid;
1347 /***********************************************************************
1348 * SetMessageQueue16 (USER.266)
1350 BOOL16 WINAPI SetMessageQueue16( INT16 size )
1352 return SetMessageQueue( size );
1356 /***********************************************************************
1357 * SetMessageQueue32 (USER32.494)
1359 BOOL WINAPI SetMessageQueue( INT size )
1361 /* now obsolete the message queue will be expanded dynamically
1364 /* access the queue to create it if it's not existing */
1370 /***********************************************************************
1371 * InitThreadInput (USER.409)
1373 HQUEUE16 WINAPI InitThreadInput16( WORD unknown, WORD flags )
1376 MESSAGEQUEUE *queuePtr;
1378 THDB *thdb = THREAD_Current();
1383 hQueue = thdb->teb.queue;
1387 /* Create thread message queue */
1388 if( !(hQueue = QUEUE_CreateMsgQueue( TRUE )))
1390 WARN(msg, "failed!\n");
1394 /* Link new queue into list */
1395 queuePtr = (MESSAGEQUEUE *)QUEUE_Lock( hQueue );
1396 queuePtr->thdb = THREAD_Current();
1399 SetThreadQueue16( 0, hQueue );
1400 thdb->teb.queue = hQueue;
1402 queuePtr->next = hFirstQueue;
1403 hFirstQueue = hQueue;
1406 QUEUE_Unlock( queuePtr );
1412 /***********************************************************************
1413 * GetQueueStatus16 (USER.334)
1415 DWORD WINAPI GetQueueStatus16( UINT16 flags )
1417 MESSAGEQUEUE *queue;
1420 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1421 ret = MAKELONG( queue->changeBits, queue->wakeBits );
1422 queue->changeBits = 0;
1423 QUEUE_Unlock( queue );
1425 return ret & MAKELONG( flags, flags );
1428 /***********************************************************************
1429 * GetQueueStatus32 (USER32.283)
1431 DWORD WINAPI GetQueueStatus( UINT 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 );
1445 /***********************************************************************
1446 * GetInputState16 (USER.335)
1448 BOOL16 WINAPI GetInputState16(void)
1450 return GetInputState();
1453 /***********************************************************************
1454 * WaitForInputIdle (USER32.577)
1456 DWORD WINAPI WaitForInputIdle (HANDLE hProcess, DWORD dwTimeOut)
1458 FIXME (msg, "(hProcess=%d, dwTimeOut=%ld): stub\n", hProcess, dwTimeOut);
1460 return WAIT_TIMEOUT;
1464 /***********************************************************************
1465 * GetInputState32 (USER32.244)
1467 BOOL WINAPI GetInputState(void)
1469 MESSAGEQUEUE *queue;
1472 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() )))
1474 ret = queue->wakeBits & (QS_KEY | QS_MOUSEBUTTON);
1475 QUEUE_Unlock( queue );
1480 /***********************************************************************
1481 * UserYield (USER.332)
1483 void WINAPI UserYield16(void)
1485 TDB *pCurTask = (TDB *)GlobalLock16( GetCurrentTask() );
1486 MESSAGEQUEUE *queue = (MESSAGEQUEUE *)QUEUE_Lock( pCurTask->hQueue );
1488 if ( !THREAD_IsWin16( THREAD_Current() ) )
1490 FIXME(task, "called for Win32 thread (%04x)!\n", THREAD_Current()->teb_sel);
1491 QUEUE_Unlock( queue );
1495 /* Handle sent messages */
1496 while (queue && (queue->wakeBits & QS_SENDMESSAGE))
1497 QUEUE_ReceiveMessage( queue );
1499 QUEUE_Unlock( queue );
1503 queue = (MESSAGEQUEUE *)QUEUE_Lock( pCurTask->hQueue );
1504 while (queue && (queue->wakeBits & QS_SENDMESSAGE))
1505 QUEUE_ReceiveMessage( queue );
1507 QUEUE_Unlock( queue );
1510 /***********************************************************************
1511 * GetMessagePos (USER.119) (USER32.272)
1513 * The GetMessagePos() function returns a long value representing a
1514 * cursor position, in screen coordinates, when the last message
1515 * retrieved by the GetMessage() function occurs. The x-coordinate is
1516 * in the low-order word of the return value, the y-coordinate is in
1517 * the high-order word. The application can use the MAKEPOINT()
1518 * macro to obtain a POINT structure from the return value.
1520 * For the current cursor position, use GetCursorPos().
1524 * Cursor position of last message on success, zero on failure.
1531 DWORD WINAPI GetMessagePos(void)
1533 MESSAGEQUEUE *queue;
1536 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1537 ret = queue->GetMessagePosVal;
1538 QUEUE_Unlock( queue );
1544 /***********************************************************************
1545 * GetMessageTime (USER.120) (USER32.273)
1547 * GetMessageTime() returns the message time for the last message
1548 * retrieved by the function. The time is measured in milliseconds with
1549 * the same offset as GetTickCount().
1551 * Since the tick count wraps, this is only useful for moderately short
1552 * relative time comparisons.
1556 * Time of last message on success, zero on failure.
1563 LONG WINAPI GetMessageTime(void)
1565 MESSAGEQUEUE *queue;
1568 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1569 ret = queue->GetMessageTimeVal;
1570 QUEUE_Unlock( queue );
1576 /***********************************************************************
1577 * GetMessageExtraInfo (USER.288) (USER32.271)
1579 LONG WINAPI GetMessageExtraInfo(void)
1581 MESSAGEQUEUE *queue;
1584 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1585 ret = queue->GetMessageExtraInfoVal;
1586 QUEUE_Unlock( queue );