windows/queue.c

   1 /*
   2  * Message queues related functions
   3  *
   4  * Copyright 1993, 1994 Alexandre Julliard
   5  */
   6
   7 #include <stdlib.h>
   8 #include <signal.h>
   9 #include "miscemu.h"
  10 #include "module.h"
  11 #include "queue.h"
  12 #include "task.h"
  13 #include "win.h"
  14 #include "clipboard.h"
  15 #include "hook.h"
  16 #include "heap.h"
  17 #include "thread.h"
  18 #include "process.h"
  19 #include "debug.h"
  20
  21 #define MAX_QUEUE_SIZE   120  /* Max. size of a message queue */
  22
  23 static HQUEUE16 hFirstQueue = 0;
  24 static HQUEUE16 hExitingQueue = 0;
  25 static HQUEUE16 hmemSysMsgQueue = 0;
  26 static MESSAGEQUEUE *sysMsgQueue = NULL;
  27
  28 static MESSAGEQUEUE *pMouseQueue = NULL;  /* Queue for last mouse message */
  29 static MESSAGEQUEUE *pKbdQueue = NULL;    /* Queue for last kbd message */
  30
  31 HQUEUE16 hCursorQueue = 0;
  32 HQUEUE16 hActiveQueue = 0;
  33
  34
  35 /***********************************************************************
  36  *           QUEUE_Lock
  37  *
  38  * Fonction for getting a 32 bit pointer on queue strcture. For thread
  39  * safeness programmers should use this function instead of GlobalLock to
  40  * retrieve a pointer on the structure. QUEUE_Unlock should also be called
  41  * when access to the queue structure is not required anymore.
  42  */
  43 MESSAGEQUEUE *QUEUE_Lock( HQUEUE16 hQueue )
  44 {
  45     MESSAGEQUEUE *queue;
  46
  47     SYSTEM_LOCK();
  48     queue = GlobalLock16( hQueue );
  49     if ( !queue || (queue->magic != QUEUE_MAGIC) )
  50     {
  51         SYSTEM_UNLOCK();
  52         return NULL;
  53     }
  54
  55     queue->lockCount++;
  56     SYSTEM_UNLOCK();
  57
  58     return queue;
  59 }
  60
  61 /***********************************************************************
  62  *           QUEUE_Unlock
  63  *
  64  * Use with QUEUE_Lock to get a thread safe acces to message queue
  65  * structure
  66  */
  67 void QUEUE_Unlock( MESSAGEQUEUE *queue )
  68 {
  69     if (queue)
  70     {
  71         SYSTEM_LOCK();
  72
  73         if ( --queue->lockCount == 0 )
  74         {
  75             DeleteCriticalSection ( &queue->cSection );
  76             GlobalFree16( queue->self );
  77         }
  78
  79         SYSTEM_UNLOCK();
  80     }
  81 }
  82
  83
  84 /***********************************************************************
  85  *           QUEUE_DumpQueue
  86  */
  87 void QUEUE_DumpQueue( HQUEUE16 hQueue )
  88 {
  89     MESSAGEQUEUE *pq;
  90
  91     if (!(pq = (MESSAGEQUEUE*) QUEUE_Lock( hQueue )) )
  92     {
  93         WARN(msg, "%04x is not a queue handle\n", hQueue );
  94         return;
  95     }
  96
  97     DUMP(    "next: %12.4x  Intertask SendMessage:\n"
  98              "thread: %10p  ----------------------\n"
  99              "hWnd: %12.8x\n"
 100              "firstMsg: %8p   msg:     %11.8x\n"
 101              "lastMsg:  %8p   wParam:   %10.8x\n"
 102              "msgCount: %8.4x   lParam:   %10.8x\n"
 103              "lockCount: %7.4x   lRet:   %12.8x\n"
 104              "wWinVer: %9.4x  ISMH: %10.4x\n"
 105              "paints: %10.4x  hSendTask: %5.4x\n"
 106              "timers: %10.4x  hPrevSend: %5.4x\n"
 107              "wakeBits: %8.4x\n"
 108              "wakeMask: %8.4x\n"
 109              "hCurHook: %8.4x\n",
 110              pq->next, pq->thdb, pq->hWnd32, pq->firstMsg, pq->msg32,
 111              pq->lastMsg, pq->wParam32, pq->msgCount, (unsigned)pq->lParam,
 112              (unsigned)pq->lockCount, (unsigned)pq->SendMessageReturn,
 113              pq->wWinVersion, pq->InSendMessageHandle,
 114              pq->wPaintCount, pq->hSendingTask, pq->wTimerCount,
 115              pq->hPrevSendingTask, pq->wakeBits, pq->wakeMask, pq->hCurHook);
 116
 117     QUEUE_Unlock( pq );
 118 }
 119
 120
 121 /***********************************************************************
 122  *           QUEUE_WalkQueues
 123  */
 124 void QUEUE_WalkQueues(void)
 125 {
 126     char module[10];
 127     HQUEUE16 hQueue = hFirstQueue;
 128
 129     DUMP( "Queue Msgs Thread   Task Module\n" );
 130     while (hQueue)
 131     {
 132         MESSAGEQUEUE *queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue );
 133         if (!queue)
 134         {
 135             WARN( msg, "Bad queue handle %04x\n", hQueue );
 136             return;
 137         }
 138         if (!GetModuleName( queue->thdb->process->task, module, sizeof(module )))
 139             strcpy( module, "???" );
 140         DUMP( "%04x %4d %p %04x %s\n", hQueue,queue->msgCount,
 141               queue->thdb, queue->thdb->process->task, module );
 142         hQueue = queue->next;
 143         QUEUE_Unlock( queue );
 144     }
 145     DUMP( "\n" );
 146 }
 147
 148
 149 /***********************************************************************
 150  *           QUEUE_IsExitingQueue
 151  */
 152 BOOL32 QUEUE_IsExitingQueue( HQUEUE16 hQueue )
 153 {
 154     return (hExitingQueue && (hQueue == hExitingQueue));
 155 }
 156
 157
 158 /***********************************************************************
 159  *           QUEUE_SetExitingQueue
 160  */
 161 void QUEUE_SetExitingQueue( HQUEUE16 hQueue )
 162 {
 163     hExitingQueue = hQueue;
 164 }
 165
 166
 167 /***********************************************************************
 168  *           QUEUE_CreateMsgQueue
 169  *
 170  * Creates a message queue. Doesn't link it into queue list!
 171  */
 172 static HQUEUE16 QUEUE_CreateMsgQueue( )
 173 {
 174     HQUEUE16 hQueue;
 175     MESSAGEQUEUE * msgQueue;
 176     TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
 177
 178     TRACE(msg,"Creating message queue...\n");
 179
 180     if (!(hQueue = GlobalAlloc16( GMEM_FIXED | GMEM_ZEROINIT,
 181                                   sizeof(MESSAGEQUEUE) )))
 182         return 0;
 183
 184     msgQueue = (MESSAGEQUEUE *) GlobalLock16( hQueue );
 185     if ( !msgQueue )
 186         return 0;
 187
 188     msgQueue->self        = hQueue;
 189     msgQueue->wakeBits    = msgQueue->changeBits = QS_SMPARAMSFREE;
 190     msgQueue->wWinVersion = pTask ? pTask->version : 0;
 191
 192     InitializeCriticalSection( &msgQueue->cSection );
 193     msgQueue->lockCount = 1;
 194     msgQueue->magic = QUEUE_MAGIC;
 195
 196     return hQueue;
 197 }
 198
 199
 200 /***********************************************************************
 201  *           QUEUE_DeleteMsgQueue
 202  *
 203  * Unlinks and deletes a message queue.
 204  *
 205  * Note: We need to mask asynchronous events to make sure PostMessage works
 206  * even in the signal handler.
 207  */
 208 BOOL32 QUEUE_DeleteMsgQueue( HQUEUE16 hQueue )
 209 {
 210     MESSAGEQUEUE * msgQueue = (MESSAGEQUEUE*)QUEUE_Lock(hQueue);
 211     HQUEUE16  senderQ;
 212     HQUEUE16 *pPrev;
 213
 214     TRACE(msg,"Deleting message queue %04x\n", hQueue);
 215
 216     if (!hQueue || !msgQueue)
 217     {
 218         WARN(msg, "invalid argument.\n");
 219         return 0;
 220     }
 221
 222     msgQueue->magic = 0;
 223
 224     if( hCursorQueue == hQueue ) hCursorQueue = 0;
 225     if( hActiveQueue == hQueue ) hActiveQueue = 0;
 226
 227     /* flush sent messages */
 228     senderQ = msgQueue->hSendingTask;
 229     while( senderQ )
 230     {
 231       MESSAGEQUEUE* sq = (MESSAGEQUEUE*)QUEUE_Lock(senderQ);
 232       if( !sq ) break;
 233       sq->SendMessageReturn = 0L;
 234       QUEUE_SetWakeBit( sq, QS_SMRESULT );
 235       senderQ = sq->hPrevSendingTask;
 236       QUEUE_Unlock(sq);
 237     }
 238
 239     SYSTEM_LOCK();
 240
 241     /* remove the message queue from the global link list */
 242     pPrev = &hFirstQueue;
 243     while (*pPrev && (*pPrev != hQueue))
 244     {
 245         MESSAGEQUEUE *msgQ = (MESSAGEQUEUE*)GlobalLock16(*pPrev);
 246         pPrev = &msgQ->next;
 247     }
 248     if (*pPrev) *pPrev = msgQueue->next;
 249     msgQueue->self = 0;
 250
 251     SYSTEM_UNLOCK();
 252
 253     /* free up resource used by MESSAGEQUEUE strcture */
 254     msgQueue->lockCount--;
 255     QUEUE_Unlock( msgQueue );
 256
 257     return 1;
 258 }
 259
 260
 261 /***********************************************************************
 262  *           QUEUE_CreateSysMsgQueue
 263  *
 264  * Create the system message queue, and set the double-click speed.
 265  * Must be called only once.
 266  */
 267 BOOL32 QUEUE_CreateSysMsgQueue( int size )
 268 {
 269     if (!(hmemSysMsgQueue = QUEUE_CreateMsgQueue( ))) return FALSE;
 270     sysMsgQueue = (MESSAGEQUEUE *) GlobalLock16( hmemSysMsgQueue );
 271     return TRUE;
 272 }
 273
 274
 275 /***********************************************************************
 276  *           QUEUE_GetSysQueue
 277  */
 278 MESSAGEQUEUE *QUEUE_GetSysQueue(void)
 279 {
 280     return sysMsgQueue;
 281 }
 282
 283 /***********************************************************************
 284  *           QUEUE_Signal
 285  */
 286 void QUEUE_Signal( THDB *thdb  )
 287 {
 288     /* Wake up thread waiting for message */
 289     SetEvent( thdb->event );
 290
 291     PostEvent( thdb->process->task );
 292 }
 293
 294 /***********************************************************************
 295  *           QUEUE_Wait
 296  */
 297 static void QUEUE_Wait( DWORD wait_mask )
 298 {
 299     if ( THREAD_IsWin16( THREAD_Current() ) )
 300         WaitEvent( 0 );
 301     else
 302     {
 303         TRACE(msg, "current task is 32-bit, calling SYNC_DoWait\n");
 304         MsgWaitForMultipleObjects( 0, NULL, FALSE, INFINITE32, wait_mask );
 305     }
 306 }
 307
 308
 309 /***********************************************************************
 310  *           QUEUE_SetWakeBit               `
 311  *
 312  * See "Windows Internals", p.449
 313  */
 314 void QUEUE_SetWakeBit( MESSAGEQUEUE *queue, WORD bit )
 315 {
 316     TRACE(msg,"queue = %04x (wm=%04x), bit = %04x\n",
 317                         queue->self, queue->wakeMask, bit );
 318
 319     if (bit & QS_MOUSE) pMouseQueue = queue;
 320     if (bit & QS_KEY) pKbdQueue = queue;
 321     queue->changeBits |= bit;
 322     queue->wakeBits   |= bit;
 323     if (queue->wakeMask & bit)
 324     {
 325         queue->wakeMask = 0;
 326         QUEUE_Signal( queue->thdb );
 327     }
 328 }
 329
 330
 331 /***********************************************************************
 332  *           QUEUE_ClearWakeBit
 333  */
 334 void QUEUE_ClearWakeBit( MESSAGEQUEUE *queue, WORD bit )
 335 {
 336     queue->changeBits &= ~bit;
 337     queue->wakeBits   &= ~bit;
 338 }
 339
 340
 341 /***********************************************************************
 342  *           QUEUE_WaitBits
 343  *
 344  * See "Windows Internals", p.447
 345  */
 346 void QUEUE_WaitBits( WORD bits )
 347 {
 348     MESSAGEQUEUE *queue;
 349
 350     TRACE(msg,"q %04x waiting for %04x\n", GetFastQueue(), bits);
 351
 352     for (;;)
 353     {
 354         if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return;
 355
 356         if (queue->changeBits & bits)
 357         {
 358             /* One of the bits is set; we can return */
 359             queue->wakeMask = 0;
 360             QUEUE_Unlock( queue );
 361             return;
 362         }
 363         if (queue->wakeBits & QS_SENDMESSAGE)
 364         {
 365             /* Process the sent message immediately */
 366
 367             queue->wakeMask = 0;
 368             QUEUE_ReceiveMessage( queue );
 369             QUEUE_Unlock( queue );
 370             continue;                           /* nested sm crux */
 371         }
 372
 373         queue->wakeMask = bits | QS_SENDMESSAGE;
 374         if(queue->changeBits & bits)
 375         {
 376             QUEUE_Unlock( queue );
 377             continue;
 378         }
 379
 380         TRACE(msg,"%04x) wakeMask is %04x, waiting\n", queue->self, queue->wakeMask);
 381
 382         QUEUE_Wait( queue->wakeMask );
 383
 384         QUEUE_Unlock( queue );
 385     }
 386 }
 387
 388
 389 /***********************************************************************
 390  *           QUEUE_ReceiveMessage
 391  *
 392  * This routine is called when a sent message is waiting for the queue.
 393  */
 394 void QUEUE_ReceiveMessage( MESSAGEQUEUE *queue )
 395 {
 396     MESSAGEQUEUE *senderQ = NULL;
 397     HQUEUE16      prevSender = 0;
 398     QSMCTRL*      prevCtrlPtr = NULL;
 399     LRESULT       result = 0;
 400
 401     TRACE(msg, "ReceiveMessage, queue %04x\n", queue->self );
 402     if (!(queue->wakeBits & QS_SENDMESSAGE) ||
 403         !(senderQ = (MESSAGEQUEUE*)QUEUE_Lock( queue->hSendingTask)))
 404         { TRACE(msg,"\trcm: nothing to do\n"); return; }
 405
 406     if( !senderQ->hPrevSendingTask )
 407         QUEUE_ClearWakeBit( queue, QS_SENDMESSAGE );   /* no more sent messages */
 408
 409     /* Save current state on stack */
 410     prevSender                 = queue->InSendMessageHandle;
 411     prevCtrlPtr                = queue->smResultCurrent;
 412
 413     /* Remove sending queue from the list */
 414     queue->InSendMessageHandle = queue->hSendingTask;
 415     queue->smResultCurrent     = senderQ->smResultInit;
 416     queue->hSendingTask        = senderQ->hPrevSendingTask;
 417
 418     TRACE(msg, "\trcm: smResultCurrent = %08x, prevCtrl = %08x\n",
 419                                 (unsigned)queue->smResultCurrent, (unsigned)prevCtrlPtr );
 420     QUEUE_SetWakeBit( senderQ, QS_SMPARAMSFREE );
 421
 422     TRACE(msg, "\trcm: calling wndproc - %08x %08x %08x %08x\n",
 423                 senderQ->hWnd32, senderQ->msg32,
 424                 senderQ->wParam32, (unsigned)senderQ->lParam );
 425
 426     if (IsWindow32( senderQ->hWnd32 ))
 427     {
 428         WND *wndPtr = WIN_FindWndPtr( senderQ->hWnd32 );
 429         DWORD extraInfo = queue->GetMessageExtraInfoVal;
 430         queue->GetMessageExtraInfoVal = senderQ->GetMessageExtraInfoVal;
 431
 432         if (senderQ->flags & QUEUE_SM_WIN32)
 433         {
 434             TRACE(msg, "\trcm: msg is Win32\n" );
 435             if (senderQ->flags & QUEUE_SM_UNICODE)
 436                 result = CallWindowProc32W( wndPtr->winproc,
 437                                             senderQ->hWnd32, senderQ->msg32,
 438                                             senderQ->wParam32, senderQ->lParam );
 439             else
 440                 result = CallWindowProc32A( wndPtr->winproc,
 441                                             senderQ->hWnd32, senderQ->msg32,
 442                                             senderQ->wParam32, senderQ->lParam );
 443         }
 444         else  /* Win16 message */
 445             result = CallWindowProc16( (WNDPROC16)wndPtr->winproc,
 446                                        (HWND16) senderQ->hWnd32,
 447                                        (UINT16) senderQ->msg32,
 448                                        LOWORD (senderQ->wParam32),
 449                                        senderQ->lParam );
 450
 451         queue->GetMessageExtraInfoVal = extraInfo;  /* Restore extra info */
 452         TRACE(msg,"\trcm: result =  %08x\n", (unsigned)result );
 453     }
 454     else WARN(msg, "\trcm: bad hWnd\n");
 455
 456     QUEUE_Unlock( senderQ );
 457
 458     /* Return the result to the sender task */
 459     ReplyMessage16( result );
 460
 461     queue->InSendMessageHandle = prevSender;
 462     queue->smResultCurrent     = prevCtrlPtr;
 463
 464     TRACE(msg,"done!\n");
 465 }
 466
 467 /***********************************************************************
 468  *           QUEUE_FlushMessage
 469  *
 470  * Try to reply to all pending sent messages on exit.
 471  */
 472 void QUEUE_FlushMessages( HQUEUE16 hQueue )
 473 {
 474   MESSAGEQUEUE *queue = (MESSAGEQUEUE*)QUEUE_Lock( hQueue );
 475
 476   if( queue )
 477   {
 478     MESSAGEQUEUE *senderQ = (MESSAGEQUEUE*)QUEUE_Lock( queue->hSendingTask );
 479     QSMCTRL*      CtrlPtr = queue->smResultCurrent;
 480
 481     TRACE(msg,"Flushing queue %04x:\n", hQueue );
 482
 483     while( senderQ )
 484     {
 485       if( !CtrlPtr )
 486            CtrlPtr = senderQ->smResultInit;
 487
 488       TRACE(msg,"\tfrom queue %04x, smResult %08x\n", queue->hSendingTask, (unsigned)CtrlPtr );
 489
 490       if( !(queue->hSendingTask = senderQ->hPrevSendingTask) )
 491         QUEUE_ClearWakeBit( queue, QS_SENDMESSAGE );
 492
 493       QUEUE_SetWakeBit( senderQ, QS_SMPARAMSFREE );
 494
 495       queue->smResultCurrent = CtrlPtr;
 496       while( senderQ->wakeBits & QS_SMRESULT ) OldYield();
 497
 498       senderQ->SendMessageReturn = 0;
 499       senderQ->smResult = queue->smResultCurrent;
 500       QUEUE_SetWakeBit( senderQ, QS_SMRESULT);
 501
 502       QUEUE_Unlock( senderQ );
 503
 504       senderQ = (MESSAGEQUEUE*)QUEUE_Lock( queue->hSendingTask );
 505       CtrlPtr = NULL;
 506     }
 507     queue->InSendMessageHandle = 0;
 508
 509     QUEUE_Unlock( queue );
 510   }
 511
 512 }
 513
 514 /***********************************************************************
 515  *           QUEUE_AddMsg
 516  *
 517  * Add a message to the queue. Return FALSE if queue is full.
 518  */
 519 BOOL32 QUEUE_AddMsg( HQUEUE16 hQueue, MSG32 *msg, DWORD extraInfo )
 520 {
 521     MESSAGEQUEUE *msgQueue;
 522     QMSG         *qmsg;
 523
 524
 525     if (!(msgQueue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return FALSE;
 526
 527     /* allocate new message in global heap for now */
 528     if (!(qmsg = (QMSG *) HeapAlloc( SystemHeap, 0, sizeof(QMSG) ) ))
 529     {
 530         QUEUE_Unlock( msgQueue );
 531         return 0;
 532     }
 533
 534     EnterCriticalSection( &msgQueue->cSection );
 535
 536       /* Store message */
 537     qmsg->msg = *msg;
 538     qmsg->extraInfo = extraInfo;
 539
 540     /* insert the message in the link list */
 541     qmsg->nextMsg = 0;
 542     qmsg->prevMsg = msgQueue->lastMsg;
 543
 544     if (msgQueue->lastMsg)
 545         msgQueue->lastMsg->nextMsg = qmsg;
 546
 547     /* update first and last anchor in message queue */
 548     msgQueue->lastMsg = qmsg;
 549     if (!msgQueue->firstMsg)
 550         msgQueue->firstMsg = qmsg;
 551
 552     msgQueue->msgCount++;
 553
 554     LeaveCriticalSection( &msgQueue->cSection );
 555
 556     QUEUE_SetWakeBit( msgQueue, QS_POSTMESSAGE );
 557     QUEUE_Unlock( msgQueue );
 558
 559     return TRUE;
 560 }
 561
 562
 563
 564 /***********************************************************************
 565  *           QUEUE_FindMsg
 566  *
 567  * Find a message matching the given parameters. Return -1 if none available.
 568  */
 569 QMSG* QUEUE_FindMsg( MESSAGEQUEUE * msgQueue, HWND32 hwnd, int first, int last )
 570 {
 571     QMSG* qmsg;
 572
 573     EnterCriticalSection( &msgQueue->cSection );
 574
 575     if (!msgQueue->msgCount)
 576         qmsg = 0;
 577     else if (!hwnd && !first && !last)
 578         qmsg = msgQueue->firstMsg;
 579     else
 580     {
 581         /* look in linked list for message matching first and last criteria */
 582         for (qmsg = msgQueue->firstMsg; qmsg; qmsg = qmsg->nextMsg)
 583     {
 584             MSG32 *msg = &(qmsg->msg);
 585
 586         if (!hwnd || (msg->hwnd == hwnd))
 587         {
 588                 if (!first && !last)
 589                     break;   /* found it */
 590
 591                 if ((msg->message >= first) && (msg->message <= last))
 592                     break;   /* found it */
 593             }
 594         }
 595     }
 596
 597     LeaveCriticalSection( &msgQueue->cSection );
 598
 599     return qmsg;
 600 }
 601
 602
 603
 604 /***********************************************************************
 605  *           QUEUE_RemoveMsg
 606  *
 607  * Remove a message from the queue (pos must be a valid position).
 608  */
 609 void QUEUE_RemoveMsg( MESSAGEQUEUE * msgQueue, QMSG *qmsg )
 610 {
 611     EnterCriticalSection( &msgQueue->cSection );
 612
 613     /* set the linked list */
 614     if (qmsg->prevMsg)
 615         qmsg->prevMsg->nextMsg = qmsg->nextMsg;
 616
 617     if (qmsg->nextMsg)
 618         qmsg->nextMsg->prevMsg = qmsg->prevMsg;
 619
 620     if (msgQueue->firstMsg == qmsg)
 621         msgQueue->firstMsg = qmsg->nextMsg;
 622
 623     if (msgQueue->lastMsg == qmsg)
 624         msgQueue->lastMsg = qmsg->prevMsg;
 625
 626     /* deallocate the memory for the message */
 627     HeapFree( SystemHeap, 0, qmsg );
 628
 629     msgQueue->msgCount--;
 630     if (!msgQueue->msgCount) msgQueue->wakeBits &= ~QS_POSTMESSAGE;
 631
 632     LeaveCriticalSection( &msgQueue->cSection );
 633 }
 634
 635
 636 /***********************************************************************
 637  *           QUEUE_WakeSomeone
 638  *
 639  * Wake a queue upon reception of a hardware event.
 640  */
 641 static void QUEUE_WakeSomeone( UINT32 message )
 642 {
 643     WND*          wndPtr = NULL;
 644     WORD          wakeBit;
 645     HWND32 hwnd;
 646     HQUEUE16     hQueue = 0;
 647     MESSAGEQUEUE *queue = NULL;
 648
 649     if (hCursorQueue)
 650         hQueue = hCursorQueue;
 651
 652     if( (message >= WM_KEYFIRST) && (message <= WM_KEYLAST) )
 653     {
 654        wakeBit = QS_KEY;
 655        if( hActiveQueue )
 656            hQueue = hActiveQueue;
 657     }
 658     else
 659     {
 660        wakeBit = (message == WM_MOUSEMOVE) ? QS_MOUSEMOVE : QS_MOUSEBUTTON;
 661        if( (hwnd = GetCapture32()) )
 662          if( (wndPtr = WIN_FindWndPtr( hwnd )) )
 663            {
 664                hQueue = wndPtr->hmemTaskQ;
 665            }
 666     }
 667
 668     if( (hwnd = GetSysModalWindow16()) )
 669     {
 670       if( (wndPtr = WIN_FindWndPtr( hwnd )) )
 671             hQueue = wndPtr->hmemTaskQ;
 672     }
 673
 674     if (hQueue)
 675         queue = QUEUE_Lock( hQueue );
 676
 677     if( !queue )
 678     {
 679         queue = QUEUE_Lock( hFirstQueue );
 680       while( queue )
 681       {
 682         if (queue->wakeMask & wakeBit) break;
 683
 684             QUEUE_Unlock(queue);
 685             queue = QUEUE_Lock( queue->next );
 686       }
 687       if( !queue )
 688       {
 689         WARN(msg, "couldn't find queue\n");
 690         return;
 691       }
 692     }
 693
 694     QUEUE_SetWakeBit( queue, wakeBit );
 695
 696     QUEUE_Unlock( queue );
 697 }
 698
 699
 700 /***********************************************************************
 701  *           hardware_event
 702  *
 703  * Add an event to the system message queue.
 704  * Note: the position is relative to the desktop window.
 705  */
 706 void hardware_event( WORD message, WORD wParam, LONG lParam,
 707                      int xPos, int yPos, DWORD time, DWORD extraInfo )
 708 {
 709     MSG32 *msg;
 710     QMSG  *qmsg = sysMsgQueue->lastMsg;
 711     int  mergeMsg = 0;
 712
 713     if (!sysMsgQueue) return;
 714
 715       /* Merge with previous event if possible */
 716
 717     if ((message == WM_MOUSEMOVE) && sysMsgQueue->lastMsg)
 718     {
 719         msg = &(sysMsgQueue->lastMsg->msg);
 720
 721         if ((msg->message == message) && (msg->wParam == wParam))
 722         {
 723             /* Merge events */
 724             qmsg = sysMsgQueue->lastMsg;
 725             mergeMsg = 1;
 726     }
 727     }
 728
 729     if (!mergeMsg)
 730     {
 731         /* Should I limit the number of message in
 732           the system message queue??? */
 733
 734         /* Don't merge allocate a new msg in the global heap */
 735
 736         if (!(qmsg = (QMSG *) HeapAlloc( SystemHeap, 0, sizeof(QMSG) ) ))
 737         return;
 738
 739         /* put message at the end of the linked list */
 740         qmsg->nextMsg = 0;
 741         qmsg->prevMsg = sysMsgQueue->lastMsg;
 742
 743         if (sysMsgQueue->lastMsg)
 744             sysMsgQueue->lastMsg->nextMsg = qmsg;
 745
 746         /* set last and first anchor index in system message queue */
 747         sysMsgQueue->lastMsg = qmsg;
 748         if (!sysMsgQueue->firstMsg)
 749             sysMsgQueue->firstMsg = qmsg;
 750
 751         sysMsgQueue->msgCount++;
 752     }
 753
 754       /* Store message */
 755     msg = &(qmsg->msg);
 756     msg->hwnd    = 0;
 757     msg->message = message;
 758     msg->wParam  = wParam;
 759     msg->lParam  = lParam;
 760     msg->time    = time;
 761     msg->pt.x    = xPos;
 762     msg->pt.y    = yPos;
 763     qmsg->extraInfo = extraInfo;
 764
 765     QUEUE_WakeSomeone( message );
 766 }
 767
 768
 769 /***********************************************************************
 770  *           QUEUE_GetQueueTask
 771  */
 772 HTASK16 QUEUE_GetQueueTask( HQUEUE16 hQueue )
 773 {
 774     HTASK16 hTask = 0;
 775
 776     MESSAGEQUEUE *queue = QUEUE_Lock( hQueue );
 777
 778     if (queue)
 779 {
 780         hTask = queue->thdb->process->task;
 781         QUEUE_Unlock( queue );
 782 }
 783
 784     return hTask;
 785 }
 786
 787
 788
 789 /***********************************************************************
 790  *           QUEUE_IncPaintCount
 791  */
 792 void QUEUE_IncPaintCount( HQUEUE16 hQueue )
 793 {
 794     MESSAGEQUEUE *queue;
 795
 796     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
 797     queue->wPaintCount++;
 798     QUEUE_SetWakeBit( queue, QS_PAINT );
 799     QUEUE_Unlock( queue );
 800 }
 801
 802
 803 /***********************************************************************
 804  *           QUEUE_DecPaintCount
 805  */
 806 void QUEUE_DecPaintCount( HQUEUE16 hQueue )
 807 {
 808     MESSAGEQUEUE *queue;
 809
 810     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
 811     queue->wPaintCount--;
 812     if (!queue->wPaintCount) queue->wakeBits &= ~QS_PAINT;
 813     QUEUE_Unlock( queue );
 814 }
 815
 816
 817 /***********************************************************************
 818  *           QUEUE_IncTimerCount
 819  */
 820 void QUEUE_IncTimerCount( HQUEUE16 hQueue )
 821 {
 822     MESSAGEQUEUE *queue;
 823
 824     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
 825     queue->wTimerCount++;
 826     QUEUE_SetWakeBit( queue, QS_TIMER );
 827     QUEUE_Unlock( queue );
 828 }
 829
 830
 831 /***********************************************************************
 832  *           QUEUE_DecTimerCount
 833  */
 834 void QUEUE_DecTimerCount( HQUEUE16 hQueue )
 835 {
 836     MESSAGEQUEUE *queue;
 837
 838     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
 839     queue->wTimerCount--;
 840     if (!queue->wTimerCount) queue->wakeBits &= ~QS_TIMER;
 841     QUEUE_Unlock( queue );
 842 }
 843
 844
 845 /***********************************************************************
 846  *           PostQuitMessage16   (USER.6)
 847  */
 848 void WINAPI PostQuitMessage16( INT16 exitCode )
 849 {
 850     PostQuitMessage32( exitCode );
 851 }
 852
 853
 854 /***********************************************************************
 855  *           PostQuitMessage32   (USER32.421)
 856  *
 857  * PostQuitMessage() posts a message to the system requesting an
 858  * application to terminate execution. As a result of this function,
 859  * the WM_QUIT message is posted to the application, and
 860  * PostQuitMessage() returns immediately.  The exitCode parameter
 861  * specifies an application-defined exit code, which appears in the
 862  * _wParam_ parameter of the WM_QUIT message posted to the application.
 863  *
 864  * CONFORMANCE
 865  *
 866  *  ECMA-234, Win32
 867  */
 868 void WINAPI PostQuitMessage32( INT32 exitCode )
 869 {
 870     MESSAGEQUEUE *queue;
 871
 872     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return;
 873     queue->wPostQMsg = TRUE;
 874     queue->wExitCode = (WORD)exitCode;
 875     QUEUE_Unlock( queue );
 876 }
 877
 878
 879 /***********************************************************************
 880  *           GetWindowTask16   (USER.224)
 881  */
 882 HTASK16 WINAPI GetWindowTask16( HWND16 hwnd )
 883 {
 884     WND *wndPtr = WIN_FindWndPtr( hwnd );
 885
 886     if (!wndPtr) return 0;
 887     return QUEUE_GetQueueTask( wndPtr->hmemTaskQ );
 888 }
 889
 890 /***********************************************************************
 891  *           GetWindowThreadProcessId   (USER32.313)
 892  */
 893 DWORD WINAPI GetWindowThreadProcessId( HWND32 hwnd, LPDWORD process )
 894 {
 895     HTASK16 htask;
 896     TDB *tdb;
 897
 898     WND *wndPtr = WIN_FindWndPtr( hwnd );
 899
 900     if (!wndPtr) return 0;
 901     htask=QUEUE_GetQueueTask( wndPtr->hmemTaskQ );
 902     tdb = (TDB*)GlobalLock16(htask);
 903     if (!tdb || !tdb->thdb) return 0;
 904     if (process) *process = PDB_TO_PROCESS_ID( tdb->thdb->process );
 905     return THDB_TO_THREAD_ID( tdb->thdb );
 906 }
 907
 908
 909 /***********************************************************************
 910  *           SetMessageQueue16   (USER.266)
 911  */
 912 BOOL16 WINAPI SetMessageQueue16( INT16 size )
 913 {
 914     return SetMessageQueue32( size );
 915 }
 916
 917
 918 /***********************************************************************
 919  *           SetMessageQueue32   (USER32.494)
 920  */
 921 BOOL32 WINAPI SetMessageQueue32( INT32 size )
 922 {
 923     /* now obsolete the message queue will be expanded dynamically
 924      as necessary */
 925
 926     /* access the queue to create it if it's not existing */
 927     GetFastQueue();
 928
 929     return TRUE;
 930 }
 931
 932 /***********************************************************************
 933  *           InitThreadInput   (USER.409)
 934  */
 935 HQUEUE16 WINAPI InitThreadInput( WORD unknown, WORD flags )
 936 {
 937     HQUEUE16 hQueue;
 938     MESSAGEQUEUE *queuePtr;
 939
 940     THDB *thdb = THREAD_Current();
 941
 942     if (!thdb)
 943         return 0;
 944
 945     hQueue = thdb->teb.queue;
 946
 947     if ( !hQueue )
 948     {
 949         /* Create thread message queue */
 950         if( !(hQueue = QUEUE_CreateMsgQueue( 0 )))
 951         {
 952             WARN(msg, "failed!\n");
 953             return FALSE;
 954     }
 955
 956         /* Link new queue into list */
 957         queuePtr = (MESSAGEQUEUE *)QUEUE_Lock( hQueue );
 958         queuePtr->thdb = THREAD_Current();
 959
 960         SYSTEM_LOCK();
 961         SetThreadQueue( 0, hQueue );
 962         thdb->teb.queue = hQueue;
 963
 964         queuePtr->next  = hFirstQueue;
 965         hFirstQueue = hQueue;
 966         SYSTEM_UNLOCK();
 967
 968         QUEUE_Unlock( queuePtr );
 969     }
 970
 971     return hQueue;
 972 }
 973
 974 /***********************************************************************
 975  *           GetQueueStatus16   (USER.334)
 976  */
 977 DWORD WINAPI GetQueueStatus16( UINT16 flags )
 978 {
 979     MESSAGEQUEUE *queue;
 980     DWORD ret;
 981
 982     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return 0;
 983     ret = MAKELONG( queue->changeBits, queue->wakeBits );
 984     queue->changeBits = 0;
 985     QUEUE_Unlock( queue );
 986
 987     return ret & MAKELONG( flags, flags );
 988 }
 989
 990 /***********************************************************************
 991  *           GetQueueStatus32   (USER32.283)
 992  */
 993 DWORD WINAPI GetQueueStatus32( UINT32 flags )
 994 {
 995     MESSAGEQUEUE *queue;
 996     DWORD ret;
 997
 998     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return 0;
 999     ret = MAKELONG( queue->changeBits, queue->wakeBits );
1000     queue->changeBits = 0;
1001     QUEUE_Unlock( queue );
1002
1003     return ret & MAKELONG( flags, flags );
1004 }
1005
1006
1007 /***********************************************************************
1008  *           GetInputState16   (USER.335)
1009  */
1010 BOOL16 WINAPI GetInputState16(void)
1011 {
1012     return GetInputState32();
1013 }
1014
1015 /***********************************************************************
1016  *           WaitForInputIdle   (USER32.577)
1017  */
1018 DWORD WINAPI WaitForInputIdle (HANDLE32 hProcess, DWORD dwTimeOut)
1019 {
1020   FIXME (msg, "(hProcess=%d, dwTimeOut=%ld): stub\n", hProcess, dwTimeOut);
1021
1022   return WAIT_TIMEOUT;
1023 }
1024
1025
1026 /***********************************************************************
1027  *           GetInputState32   (USER32.244)
1028  */
1029 BOOL32 WINAPI GetInputState32(void)
1030 {
1031     MESSAGEQUEUE *queue;
1032     BOOL32 ret;
1033
1034     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() )))
1035         return FALSE;
1036     ret = queue->wakeBits & (QS_KEY | QS_MOUSEBUTTON);
1037     QUEUE_Unlock( queue );
1038
1039     return ret;
1040 }
1041
1042 /***********************************************************************
1043  *           UserYield  (USER.332)
1044  */
1045 void WINAPI UserYield(void)
1046 {
1047     TDB *pCurTask = (TDB *)GlobalLock16( GetCurrentTask() );
1048     MESSAGEQUEUE *queue = (MESSAGEQUEUE *)QUEUE_Lock( pCurTask->hQueue );
1049
1050     if ( !THREAD_IsWin16( THREAD_Current() ) )
1051     {
1052         FIXME(task, "called for Win32 thread (%04x)!\n", THREAD_Current()->teb_sel);
1053         QUEUE_Unlock( queue );
1054         return;
1055     }
1056
1057     /* Handle sent messages */
1058     while (queue && (queue->wakeBits & QS_SENDMESSAGE))
1059         QUEUE_ReceiveMessage( queue );
1060
1061     QUEUE_Unlock( queue );
1062
1063     OldYield();
1064
1065     queue = (MESSAGEQUEUE *)QUEUE_Lock( pCurTask->hQueue );
1066     while (queue && (queue->wakeBits & QS_SENDMESSAGE))
1067         QUEUE_ReceiveMessage( queue );
1068
1069     QUEUE_Unlock( queue );
1070 }
1071
1072 /***********************************************************************
1073  *           GetMessagePos   (USER.119) (USER32.272)
1074  *
1075  * The GetMessagePos() function returns a long value representing a
1076  * cursor position, in screen coordinates, when the last message
1077  * retrieved by the GetMessage() function occurs. The x-coordinate is
1078  * in the low-order word of the return value, the y-coordinate is in
1079  * the high-order word. The application can use the MAKEPOINT()
1080  * macro to obtain a POINT structure from the return value.
1081  *
1082  * For the current cursor position, use GetCursorPos().
1083  *
1084  * RETURNS
1085  *
1086  * Cursor position of last message on success, zero on failure.
1087  *
1088  * CONFORMANCE
1089  *
1090  * ECMA-234, Win32
1091  *
1092  */
1093 DWORD WINAPI GetMessagePos(void)
1094 {
1095     MESSAGEQUEUE *queue;
1096     DWORD ret;
1097
1098     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return 0;
1099     ret = queue->GetMessagePosVal;
1100     QUEUE_Unlock( queue );
1101
1102     return ret;
1103 }
1104
1105
1106 /***********************************************************************
1107  *           GetMessageTime   (USER.120) (USER32.273)
1108  *
1109  * GetMessageTime() returns the message time for the last message
1110  * retrieved by the function. The time is measured in milliseconds with
1111  * the same offset as GetTickCount().
1112  *
1113  * Since the tick count wraps, this is only useful for moderately short
1114  * relative time comparisons.
1115  *
1116  * RETURNS
1117  *
1118  * Time of last message on success, zero on failure.
1119  *
1120  * CONFORMANCE
1121  *
1122  * ECMA-234, Win32
1123  *
1124  */
1125 LONG WINAPI GetMessageTime(void)
1126 {
1127     MESSAGEQUEUE *queue;
1128     LONG ret;
1129
1130     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return 0;
1131     ret = queue->GetMessageTimeVal;
1132     QUEUE_Unlock( queue );
1133
1134     return ret;
1135 }
1136
1137
1138 /***********************************************************************
1139  *           GetMessageExtraInfo   (USER.288) (USER32.271)
1140  */
1141 LONG WINAPI GetMessageExtraInfo(void)
1142 {
1143     MESSAGEQUEUE *queue;
1144     LONG ret;
1145
1146     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue() ))) return 0;
1147     ret = queue->GetMessageExtraInfoVal;
1148     QUEUE_Unlock( queue );
1149
1150     return ret;
1151 }