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:
754 /* make it thread safe, could be accessed by the sender and
758 EnterCriticalSection( &queue->cSection );
759 smsg->nextPending = NULL;
760 prev = &queue->smPending;
762 prev = &(*prev)->nextPending;
764 LeaveCriticalSection( &queue->cSection );
766 QUEUE_SetWakeBit( queue, QS_SENDMESSAGE );
771 WARN(sendmsg, "Invalid list: %d", list);
779 /***********************************************************************
782 * This routine is called when a SMSG need to be remove from one of the three
783 * SM list. (SM_PROCESSING_LIST, SM_PENDING_LIST, SM_WAITING_LIST)
784 * If smsg == 0, remove the first smsg from the specified list
786 SMSG *QUEUE_RemoveSMSG( MESSAGEQUEUE *queue, int list, SMSG *smsg )
791 case SM_PROCESSING_LIST:
792 /* don't need to be thread safe, only accessed by the
793 thread associated with the sender queue */
795 /* if smsg is equal to null, it means the first in the list */
797 smsg = queue->smProcessing;
799 TRACE(sendmsg,"queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
800 smsg, SPY_GetMsgName(smsg->msg));
801 /* In fact SM_PROCESSING_LIST is a stack, and smsg
802 should be always at the top of the list */
803 if ( (smsg != queue->smProcessing) || !queue->smProcessing )
805 ERR( sendmsg, "smsg not at the top of Processing list, smsg=0x%p queue=0x%p", smsg, queue);
810 queue->smProcessing = smsg->nextProcessing;
811 smsg->nextProcessing = 0;
815 case SM_WAITING_LIST:
816 /* don't need to be thread safe, only accessed by the
817 thread associated with the receiver queue */
819 /* if smsg is equal to null, it means the first in the list */
821 smsg = queue->smWaiting;
823 TRACE(sendmsg,"queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
824 smsg, SPY_GetMsgName(smsg->msg));
825 /* In fact SM_WAITING_LIST is a stack, and smsg
826 should be always at the top of the list */
827 if ( (smsg != queue->smWaiting) || !queue->smWaiting )
829 ERR( sendmsg, "smsg not at the top of Waiting list, smsg=0x%p queue=0x%p", smsg, queue);
834 queue->smWaiting = smsg->nextWaiting;
835 smsg->nextWaiting = 0;
839 case SM_PENDING_LIST:
840 /* make it thread safe, could be accessed by the sender and
842 EnterCriticalSection( &queue->cSection );
844 if (!smsg || !queue->smPending)
845 smsg = queue->smPending;
848 ERR( sendmsg, "should always remove the top one in Pending list, smsg=0x%p queue=0x%p", smsg, queue);
852 TRACE(sendmsg,"queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
853 smsg, SPY_GetMsgName(smsg->msg));
855 queue->smPending = smsg->nextPending;
856 smsg->nextPending = 0;
858 /* if no more SMSG in Pending list, clear QS_SENDMESSAGE flag */
859 if (!queue->smPending)
860 QUEUE_ClearWakeBit( queue, QS_SENDMESSAGE );
862 LeaveCriticalSection( &queue->cSection );
866 WARN(sendmsg, "Invalid list: %d", list);
874 /***********************************************************************
875 * QUEUE_ReceiveMessage
877 * This routine is called when a sent message is waiting for the queue.
879 void QUEUE_ReceiveMessage( MESSAGEQUEUE *queue )
883 MESSAGEQUEUE *senderQ;
885 TRACE(sendmsg, "queue %04x\n", queue->self );
887 if ( !(queue->wakeBits & QS_SENDMESSAGE) && queue->smPending )
889 TRACE(sendmsg,"\trcm: nothing to do\n");
893 /* remove smsg on the top of the pending list and put it in the processing list */
894 smsg = QUEUE_RemoveSMSG(queue, SM_PENDING_LIST, 0);
895 QUEUE_AddSMSG(queue, SM_WAITING_LIST, smsg);
897 TRACE(sendmsg,"RM: %s [%04x] (%04x -> %04x)\n",
898 SPY_GetMsgName(smsg->msg), smsg->msg, smsg->hSrcQueue, smsg->hDstQueue );
900 if (IsWindow( smsg->hWnd ))
902 WND *wndPtr = WIN_FindWndPtr( smsg->hWnd );
903 DWORD extraInfo = queue->GetMessageExtraInfoVal; /* save ExtraInfo */
905 /* use sender queue extra info value while calling the window proc */
906 senderQ = (MESSAGEQUEUE*)QUEUE_Lock( smsg->hSrcQueue );
909 queue->GetMessageExtraInfoVal = senderQ->GetMessageExtraInfoVal;
910 QUEUE_Unlock( senderQ );
913 /* call the right version of CallWindowProcXX */
914 if (smsg->flags & SMSG_WIN32)
916 TRACE(sendmsg, "\trcm: msg is Win32\n" );
917 if (smsg->flags & SMSG_UNICODE)
918 result = CallWindowProcW( wndPtr->winproc,
919 smsg->hWnd, smsg->msg,
920 smsg->wParam, smsg->lParam );
922 result = CallWindowProcA( wndPtr->winproc,
923 smsg->hWnd, smsg->msg,
924 smsg->wParam, smsg->lParam );
926 else /* Win16 message */
927 result = CallWindowProc16( (WNDPROC16)wndPtr->winproc,
930 LOWORD (smsg->wParam),
933 queue->GetMessageExtraInfoVal = extraInfo; /* Restore extra info */
934 WIN_ReleaseWndPtr(wndPtr);
935 TRACE(sendmsg,"result = %08x\n", (unsigned)result );
937 else WARN(sendmsg, "\trcm: bad hWnd\n");
940 /* set SMSG_SENDING_REPLY flag to tell ReplyMessage16, it's not
942 smsg->flags |= SMSG_SENDING_REPLY;
943 ReplyMessage( result );
945 TRACE( sendmsg,"done! \n" );
950 /***********************************************************************
953 * Add a message to the queue. Return FALSE if queue is full.
955 BOOL QUEUE_AddMsg( HQUEUE16 hQueue, MSG *msg, DWORD extraInfo )
957 MESSAGEQUEUE *msgQueue;
961 if (!(msgQueue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return FALSE;
963 /* allocate new message in global heap for now */
964 if (!(qmsg = (QMSG *) HeapAlloc( SystemHeap, 0, sizeof(QMSG) ) ))
966 QUEUE_Unlock( msgQueue );
970 EnterCriticalSection( &msgQueue->cSection );
974 qmsg->extraInfo = extraInfo;
976 /* insert the message in the link list */
978 qmsg->prevMsg = msgQueue->lastMsg;
980 if (msgQueue->lastMsg)
981 msgQueue->lastMsg->nextMsg = qmsg;
983 /* update first and last anchor in message queue */
984 msgQueue->lastMsg = qmsg;
985 if (!msgQueue->firstMsg)
986 msgQueue->firstMsg = qmsg;
988 msgQueue->msgCount++;
990 LeaveCriticalSection( &msgQueue->cSection );
992 QUEUE_SetWakeBit( msgQueue, QS_POSTMESSAGE );
993 QUEUE_Unlock( msgQueue );
1000 /***********************************************************************
1003 * Find a message matching the given parameters. Return -1 if none available.
1005 QMSG* QUEUE_FindMsg( MESSAGEQUEUE * msgQueue, HWND hwnd, int first, int last )
1009 EnterCriticalSection( &msgQueue->cSection );
1011 if (!msgQueue->msgCount)
1013 else if (!hwnd && !first && !last)
1014 qmsg = msgQueue->firstMsg;
1017 /* look in linked list for message matching first and last criteria */
1018 for (qmsg = msgQueue->firstMsg; qmsg; qmsg = qmsg->nextMsg)
1020 MSG *msg = &(qmsg->msg);
1022 if (!hwnd || (msg->hwnd == hwnd))
1024 if (!first && !last)
1025 break; /* found it */
1027 if ((msg->message >= first) && (!last || (msg->message <= last)))
1028 break; /* found it */
1033 LeaveCriticalSection( &msgQueue->cSection );
1040 /***********************************************************************
1043 * Remove a message from the queue (pos must be a valid position).
1045 void QUEUE_RemoveMsg( MESSAGEQUEUE * msgQueue, QMSG *qmsg )
1047 EnterCriticalSection( &msgQueue->cSection );
1049 /* set the linked list */
1051 qmsg->prevMsg->nextMsg = qmsg->nextMsg;
1054 qmsg->nextMsg->prevMsg = qmsg->prevMsg;
1056 if (msgQueue->firstMsg == qmsg)
1057 msgQueue->firstMsg = qmsg->nextMsg;
1059 if (msgQueue->lastMsg == qmsg)
1060 msgQueue->lastMsg = qmsg->prevMsg;
1062 /* deallocate the memory for the message */
1063 HeapFree( SystemHeap, 0, qmsg );
1065 msgQueue->msgCount--;
1066 if (!msgQueue->msgCount) msgQueue->wakeBits &= ~QS_POSTMESSAGE;
1068 LeaveCriticalSection( &msgQueue->cSection );
1072 /***********************************************************************
1075 * Wake a queue upon reception of a hardware event.
1077 static void QUEUE_WakeSomeone( UINT message )
1082 HQUEUE16 hQueue = 0;
1083 MESSAGEQUEUE *queue = NULL;
1086 hQueue = hCursorQueue;
1088 if( (message >= WM_KEYFIRST) && (message <= WM_KEYLAST) )
1092 hQueue = hActiveQueue;
1096 wakeBit = (message == WM_MOUSEMOVE) ? QS_MOUSEMOVE : QS_MOUSEBUTTON;
1097 if( (hwnd = GetCapture()) )
1098 if( (wndPtr = WIN_FindWndPtr( hwnd )) )
1100 hQueue = wndPtr->hmemTaskQ;
1101 WIN_ReleaseWndPtr(wndPtr);
1105 if( (hwnd = GetSysModalWindow16()) )
1107 if( (wndPtr = WIN_FindWndPtr( hwnd )) )
1109 hQueue = wndPtr->hmemTaskQ;
1110 WIN_ReleaseWndPtr(wndPtr);
1115 queue = QUEUE_Lock( hQueue );
1119 queue = QUEUE_Lock( hFirstQueue );
1122 if (queue->wakeMask & wakeBit) break;
1124 QUEUE_Unlock(queue);
1125 queue = QUEUE_Lock( queue->next );
1129 WARN(msg, "couldn't find queue\n");
1134 QUEUE_SetWakeBit( queue, wakeBit );
1136 QUEUE_Unlock( queue );
1140 /***********************************************************************
1143 * Add an event to the system message queue.
1144 * Note: the position is relative to the desktop window.
1146 void hardware_event( WORD message, WORD wParam, LONG lParam,
1147 int xPos, int yPos, DWORD time, DWORD extraInfo )
1150 QMSG *qmsg = sysMsgQueue->lastMsg;
1153 if (!sysMsgQueue) return;
1155 /* Merge with previous event if possible */
1157 if ((message == WM_MOUSEMOVE) && sysMsgQueue->lastMsg)
1159 msg = &(sysMsgQueue->lastMsg->msg);
1161 if ((msg->message == message) && (msg->wParam == wParam))
1164 qmsg = sysMsgQueue->lastMsg;
1171 /* Should I limit the number of message in
1172 the system message queue??? */
1174 /* Don't merge allocate a new msg in the global heap */
1176 if (!(qmsg = (QMSG *) HeapAlloc( SystemHeap, 0, sizeof(QMSG) ) ))
1179 /* put message at the end of the linked list */
1181 qmsg->prevMsg = sysMsgQueue->lastMsg;
1183 if (sysMsgQueue->lastMsg)
1184 sysMsgQueue->lastMsg->nextMsg = qmsg;
1186 /* set last and first anchor index in system message queue */
1187 sysMsgQueue->lastMsg = qmsg;
1188 if (!sysMsgQueue->firstMsg)
1189 sysMsgQueue->firstMsg = qmsg;
1191 sysMsgQueue->msgCount++;
1197 msg->message = message;
1198 msg->wParam = wParam;
1199 msg->lParam = lParam;
1203 qmsg->extraInfo = extraInfo;
1205 QUEUE_WakeSomeone( message );
1209 /***********************************************************************
1210 * QUEUE_GetQueueTask
1212 HTASK16 QUEUE_GetQueueTask( HQUEUE16 hQueue )
1216 MESSAGEQUEUE *queue = QUEUE_Lock( hQueue );
1220 hTask = queue->thdb->process->task;
1221 QUEUE_Unlock( queue );
1229 /***********************************************************************
1230 * QUEUE_IncPaintCount
1232 void QUEUE_IncPaintCount( HQUEUE16 hQueue )
1234 MESSAGEQUEUE *queue;
1236 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1237 queue->wPaintCount++;
1238 QUEUE_SetWakeBit( queue, QS_PAINT );
1239 QUEUE_Unlock( queue );
1243 /***********************************************************************
1244 * QUEUE_DecPaintCount
1246 void QUEUE_DecPaintCount( HQUEUE16 hQueue )
1248 MESSAGEQUEUE *queue;
1250 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1251 queue->wPaintCount--;
1252 if (!queue->wPaintCount) queue->wakeBits &= ~QS_PAINT;
1253 QUEUE_Unlock( queue );
1257 /***********************************************************************
1258 * QUEUE_IncTimerCount
1260 void QUEUE_IncTimerCount( HQUEUE16 hQueue )
1262 MESSAGEQUEUE *queue;
1264 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1265 queue->wTimerCount++;
1266 QUEUE_SetWakeBit( queue, QS_TIMER );
1267 QUEUE_Unlock( queue );
1271 /***********************************************************************
1272 * QUEUE_DecTimerCount
1274 void QUEUE_DecTimerCount( HQUEUE16 hQueue )
1276 MESSAGEQUEUE *queue;
1278 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1279 queue->wTimerCount--;
1280 if (!queue->wTimerCount) queue->wakeBits &= ~QS_TIMER;
1281 QUEUE_Unlock( queue );
1285 /***********************************************************************
1286 * PostQuitMessage16 (USER.6)
1288 void WINAPI PostQuitMessage16( INT16 exitCode )
1290 PostQuitMessage( exitCode );
1294 /***********************************************************************
1295 * PostQuitMessage32 (USER32.421)
1297 * PostQuitMessage() posts a message to the system requesting an
1298 * application to terminate execution. As a result of this function,
1299 * the WM_QUIT message is posted to the application, and
1300 * PostQuitMessage() returns immediately. The exitCode parameter
1301 * specifies an application-defined exit code, which appears in the
1302 * _wParam_ parameter of the WM_QUIT message posted to the application.
1308 void WINAPI PostQuitMessage( INT exitCode )
1310 MESSAGEQUEUE *queue;
1312 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return;
1313 queue->wPostQMsg = TRUE;
1314 queue->wExitCode = (WORD)exitCode;
1315 QUEUE_Unlock( queue );
1319 /***********************************************************************
1320 * GetWindowTask16 (USER.224)
1322 HTASK16 WINAPI GetWindowTask16( HWND16 hwnd )
1325 WND *wndPtr = WIN_FindWndPtr( hwnd );
1327 if (!wndPtr) return 0;
1328 retvalue = QUEUE_GetQueueTask( wndPtr->hmemTaskQ );
1329 WIN_ReleaseWndPtr(wndPtr);
1333 /***********************************************************************
1334 * GetWindowThreadProcessId (USER32.313)
1336 DWORD WINAPI GetWindowThreadProcessId( HWND hwnd, LPDWORD process )
1342 WND *wndPtr = WIN_FindWndPtr( hwnd );
1344 if (!wndPtr) return 0;
1345 htask=QUEUE_GetQueueTask( wndPtr->hmemTaskQ );
1346 WIN_ReleaseWndPtr(wndPtr);
1347 tdb = (TDB*)GlobalLock16(htask);
1348 if (!tdb || !tdb->thdb) return 0;
1349 if (process) *process = (DWORD)tdb->thdb->process->server_pid;
1350 return (DWORD)tdb->thdb->server_tid;
1354 /***********************************************************************
1355 * SetMessageQueue16 (USER.266)
1357 BOOL16 WINAPI SetMessageQueue16( INT16 size )
1359 return SetMessageQueue( size );
1363 /***********************************************************************
1364 * SetMessageQueue32 (USER32.494)
1366 BOOL WINAPI SetMessageQueue( INT size )
1368 /* now obsolete the message queue will be expanded dynamically
1371 /* access the queue to create it if it's not existing */
1377 /***********************************************************************
1378 * InitThreadInput (USER.409)
1380 HQUEUE16 WINAPI InitThreadInput16( WORD unknown, WORD flags )
1383 MESSAGEQUEUE *queuePtr;
1385 THDB *thdb = THREAD_Current();
1390 hQueue = thdb->teb.queue;
1394 /* Create thread message queue */
1395 if( !(hQueue = QUEUE_CreateMsgQueue( TRUE )))
1397 WARN(msg, "failed!\n");
1401 /* Link new queue into list */
1402 queuePtr = (MESSAGEQUEUE *)QUEUE_Lock( hQueue );
1403 queuePtr->thdb = THREAD_Current();
1406 SetThreadQueue16( 0, hQueue );
1407 thdb->teb.queue = hQueue;
1409 queuePtr->next = hFirstQueue;
1410 hFirstQueue = hQueue;
1413 QUEUE_Unlock( queuePtr );
1419 /***********************************************************************
1420 * GetQueueStatus16 (USER.334)
1422 DWORD WINAPI GetQueueStatus16( UINT16 flags )
1424 MESSAGEQUEUE *queue;
1427 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1428 ret = MAKELONG( queue->changeBits, queue->wakeBits );
1429 queue->changeBits = 0;
1430 QUEUE_Unlock( queue );
1432 return ret & MAKELONG( flags, flags );
1435 /***********************************************************************
1436 * GetQueueStatus32 (USER32.283)
1438 DWORD WINAPI GetQueueStatus( UINT flags )
1440 MESSAGEQUEUE *queue;
1443 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1444 ret = MAKELONG( queue->changeBits, queue->wakeBits );
1445 queue->changeBits = 0;
1446 QUEUE_Unlock( queue );
1448 return ret & MAKELONG( flags, flags );
1452 /***********************************************************************
1453 * GetInputState16 (USER.335)
1455 BOOL16 WINAPI GetInputState16(void)
1457 return GetInputState();
1460 /***********************************************************************
1461 * WaitForInputIdle (USER32.577)
1463 DWORD WINAPI WaitForInputIdle (HANDLE hProcess, DWORD dwTimeOut)
1465 FIXME (msg, "(hProcess=%d, dwTimeOut=%ld): stub\n", hProcess, dwTimeOut);
1467 return WAIT_TIMEOUT;
1471 /***********************************************************************
1472 * GetInputState32 (USER32.244)
1474 BOOL WINAPI GetInputState(void)
1476 MESSAGEQUEUE *queue;
1479 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() )))
1481 ret = queue->wakeBits & (QS_KEY | QS_MOUSEBUTTON);
1482 QUEUE_Unlock( queue );
1487 /***********************************************************************
1488 * UserYield (USER.332)
1490 void WINAPI UserYield16(void)
1492 TDB *pCurTask = (TDB *)GlobalLock16( GetCurrentTask() );
1493 MESSAGEQUEUE *queue = (MESSAGEQUEUE *)QUEUE_Lock( pCurTask->hQueue );
1495 if ( !THREAD_IsWin16( THREAD_Current() ) )
1497 FIXME(task, "called for Win32 thread (%04x)!\n", THREAD_Current()->teb_sel);
1498 QUEUE_Unlock( queue );
1502 /* Handle sent messages */
1503 while (queue && (queue->wakeBits & QS_SENDMESSAGE))
1504 QUEUE_ReceiveMessage( queue );
1506 QUEUE_Unlock( queue );
1510 queue = (MESSAGEQUEUE *)QUEUE_Lock( pCurTask->hQueue );
1511 while (queue && (queue->wakeBits & QS_SENDMESSAGE))
1512 QUEUE_ReceiveMessage( queue );
1514 QUEUE_Unlock( queue );
1517 /***********************************************************************
1518 * GetMessagePos (USER.119) (USER32.272)
1520 * The GetMessagePos() function returns a long value representing a
1521 * cursor position, in screen coordinates, when the last message
1522 * retrieved by the GetMessage() function occurs. The x-coordinate is
1523 * in the low-order word of the return value, the y-coordinate is in
1524 * the high-order word. The application can use the MAKEPOINT()
1525 * macro to obtain a POINT structure from the return value.
1527 * For the current cursor position, use GetCursorPos().
1531 * Cursor position of last message on success, zero on failure.
1538 DWORD WINAPI GetMessagePos(void)
1540 MESSAGEQUEUE *queue;
1543 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1544 ret = queue->GetMessagePosVal;
1545 QUEUE_Unlock( queue );
1551 /***********************************************************************
1552 * GetMessageTime (USER.120) (USER32.273)
1554 * GetMessageTime() returns the message time for the last message
1555 * retrieved by the function. The time is measured in milliseconds with
1556 * the same offset as GetTickCount().
1558 * Since the tick count wraps, this is only useful for moderately short
1559 * relative time comparisons.
1563 * Time of last message on success, zero on failure.
1570 LONG WINAPI GetMessageTime(void)
1572 MESSAGEQUEUE *queue;
1575 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1576 ret = queue->GetMessageTimeVal;
1577 QUEUE_Unlock( queue );
1583 /***********************************************************************
1584 * GetMessageExtraInfo (USER.288) (USER32.271)
1586 LONG WINAPI GetMessageExtraInfo(void)
1588 MESSAGEQUEUE *queue;
1591 if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1592 ret = queue->GetMessageExtraInfoVal;
1593 QUEUE_Unlock( queue );