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 "module.h"
  10 #include "queue.h"
  11 #include "task.h"
  12 #include "win.h"
  13 #include "hook.h"
  14 #include "thread.h"
  15 #include "process.h"
  16 #include "stddebug.h"
  17 #include "debug.h"
  18
  19 #define MAX_QUEUE_SIZE   120  /* Max. size of a message queue */
  20
  21 static HQUEUE16 hFirstQueue = 0;
  22 static HQUEUE16 hDoomedQueue = 0;
  23 static HQUEUE16 hmemSysMsgQueue = 0;
  24 static MESSAGEQUEUE *sysMsgQueue = NULL;
  25
  26 static MESSAGEQUEUE *pMouseQueue = NULL;  /* Queue for last mouse message */
  27 static MESSAGEQUEUE *pKbdQueue = NULL;    /* Queue for last kbd message */
  28
  29 extern void SIGNAL_MaskAsyncEvents(BOOL32);
  30
  31 MESSAGEQUEUE *pCursorQueue = NULL;
  32 MESSAGEQUEUE *pActiveQueue = NULL;
  33
  34 /***********************************************************************
  35  *           QUEUE_DumpQueue
  36  */
  37 void QUEUE_DumpQueue( HQUEUE16 hQueue )
  38 {
  39     MESSAGEQUEUE *pq;
  40
  41     if (!(pq = (MESSAGEQUEUE*) GlobalLock16( hQueue )) ||
  42         GlobalSize16(hQueue) < sizeof(MESSAGEQUEUE)+pq->queueSize*sizeof(QMSG))
  43     {
  44         fprintf( stderr, "%04x is not a queue handle\n", hQueue );
  45         return;
  46     }
  47
  48     fprintf( stderr,
  49              "next: %12.4x  Intertask SendMessage:\n"
  50              "hTask: %11.4x  ----------------------\n"
  51              "msgSize: %9.4x  hWnd: %10.4x\n"
  52              "msgCount: %8.4x  msg: %11.4x\n"
  53              "msgNext: %9.4x  wParam: %8.4x\n"
  54              "msgFree: %9.4x  lParam: %8.8x\n"
  55              "qSize: %11.4x  lRet: %10.8x\n"
  56              "wWinVer: %9.4x  ISMH: %10.4x\n"
  57              "paints: %10.4x  hSendTask: %5.4x\n"
  58              "timers: %10.4x  hPrevSend: %5.4x\n"
  59              "wakeBits: %8.4x\n"
  60              "wakeMask: %8.4x\n"
  61              "hCurHook: %8.4x\n",
  62              pq->next, pq->hTask, pq->msgSize, pq->hWnd,
  63              pq->msgCount, pq->msg, pq->nextMessage, pq->wParam,
  64              pq->nextFreeMessage, (unsigned)pq->lParam, pq->queueSize,
  65              (unsigned)pq->SendMessageReturn, pq->wWinVersion, pq->InSendMessageHandle,
  66              pq->wPaintCount, pq->hSendingTask, pq->wTimerCount,
  67              pq->hPrevSendingTask, pq->wakeBits, pq->wakeMask, pq->hCurHook);
  68 }
  69
  70
  71 /***********************************************************************
  72  *           QUEUE_WalkQueues
  73  */
  74 void QUEUE_WalkQueues(void)
  75 {
  76     HQUEUE16 hQueue = hFirstQueue;
  77
  78     fprintf( stderr, "Queue Size Msgs Task\n" );
  79     while (hQueue)
  80     {
  81         MESSAGEQUEUE *queue = (MESSAGEQUEUE *)GlobalLock16( hQueue );
  82         if (!queue)
  83         {
  84             fprintf( stderr, "*** Bad queue handle %04x\n", hQueue );
  85             return;
  86         }
  87         fprintf( stderr, "%04x %5d %4d %04x %s\n",
  88                  hQueue, queue->msgSize, queue->msgCount, queue->hTask,
  89                  MODULE_GetModuleName( GetExePtr(queue->hTask) ) );
  90         hQueue = queue->next;
  91     }
  92     fprintf( stderr, "\n" );
  93 }
  94
  95
  96 /***********************************************************************
  97  *           QUEUE_IsDoomedQueue
  98  */
  99 BOOL32 QUEUE_IsDoomedQueue( HQUEUE16 hQueue )
 100 {
 101     return (hDoomedQueue && (hQueue == hDoomedQueue));
 102 }
 103
 104
 105 /***********************************************************************
 106  *           QUEUE_SetDoomedQueue
 107  */
 108 void QUEUE_SetDoomedQueue( HQUEUE16 hQueue )
 109 {
 110     hDoomedQueue = hQueue;
 111 }
 112
 113
 114 /***********************************************************************
 115  *           QUEUE_CreateMsgQueue
 116  *
 117  * Creates a message queue. Doesn't link it into queue list!
 118  */
 119 static HQUEUE16 QUEUE_CreateMsgQueue( int size )
 120 {
 121     HQUEUE16 hQueue;
 122     MESSAGEQUEUE * msgQueue;
 123     int queueSize;
 124     TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
 125
 126     dprintf_msg(stddeb,"Creating message queue...\n");
 127
 128     queueSize = sizeof(MESSAGEQUEUE) + size * sizeof(QMSG);
 129     if (!(hQueue = GlobalAlloc16( GMEM_FIXED | GMEM_ZEROINIT, queueSize )))
 130         return 0;
 131     msgQueue = (MESSAGEQUEUE *) GlobalLock16( hQueue );
 132     msgQueue->self        = hQueue;
 133     msgQueue->msgSize     = sizeof(QMSG);
 134     msgQueue->queueSize   = size;
 135     msgQueue->wakeBits    = msgQueue->changeBits = QS_SMPARAMSFREE;
 136     msgQueue->wWinVersion = pTask ? pTask->version : 0;
 137     GlobalUnlock16( hQueue );
 138     return hQueue;
 139 }
 140
 141
 142 /***********************************************************************
 143  *           QUEUE_DeleteMsgQueue
 144  *
 145  * Unlinks and deletes a message queue.
 146  *
 147  * Note: We need to mask asynchronous events to make sure PostMessage works
 148  * even in the signal handler.
 149  */
 150 BOOL32 QUEUE_DeleteMsgQueue( HQUEUE16 hQueue )
 151 {
 152     MESSAGEQUEUE * msgQueue = (MESSAGEQUEUE*)GlobalLock16(hQueue);
 153     HQUEUE16  senderQ;
 154     HQUEUE16 *pPrev;
 155
 156     dprintf_msg(stddeb,"Deleting message queue %04x\n", hQueue);
 157
 158     if (!hQueue || !msgQueue)
 159     {
 160         dprintf_msg(stddeb,"DeleteMsgQueue: invalid argument.\n");
 161         return 0;
 162     }
 163     if( pCursorQueue == msgQueue ) pCursorQueue = NULL;
 164     if( pActiveQueue == msgQueue ) pActiveQueue = NULL;
 165
 166     /* flush sent messages */
 167     senderQ = msgQueue->hSendingTask;
 168     while( senderQ )
 169     {
 170       MESSAGEQUEUE* sq = (MESSAGEQUEUE*)GlobalLock16(senderQ);
 171       if( !sq ) break;
 172       sq->SendMessageReturn = 0L;
 173       QUEUE_SetWakeBit( sq, QS_SMRESULT );
 174       senderQ = sq->hPrevSendingTask;
 175     }
 176
 177     SIGNAL_MaskAsyncEvents( TRUE );
 178
 179     pPrev = &hFirstQueue;
 180     while (*pPrev && (*pPrev != hQueue))
 181     {
 182         MESSAGEQUEUE *msgQ = (MESSAGEQUEUE*)GlobalLock16(*pPrev);
 183         pPrev = &msgQ->next;
 184     }
 185     if (*pPrev) *pPrev = msgQueue->next;
 186     msgQueue->self = 0;
 187
 188     SIGNAL_MaskAsyncEvents( FALSE );
 189
 190     GlobalFree16( hQueue );
 191     return 1;
 192 }
 193
 194
 195 /***********************************************************************
 196  *           QUEUE_CreateSysMsgQueue
 197  *
 198  * Create the system message queue, and set the double-click speed.
 199  * Must be called only once.
 200  */
 201 BOOL32 QUEUE_CreateSysMsgQueue( int size )
 202 {
 203     if (size > MAX_QUEUE_SIZE) size = MAX_QUEUE_SIZE;
 204     else if (size <= 0) size = 1;
 205     if (!(hmemSysMsgQueue = QUEUE_CreateMsgQueue( size ))) return FALSE;
 206     sysMsgQueue = (MESSAGEQUEUE *) GlobalLock16( hmemSysMsgQueue );
 207     return TRUE;
 208 }
 209
 210
 211 /***********************************************************************
 212  *           QUEUE_GetSysQueue
 213  */
 214 MESSAGEQUEUE *QUEUE_GetSysQueue(void)
 215 {
 216     return sysMsgQueue;
 217 }
 218
 219
 220 /***********************************************************************
 221  *           QUEUE_SetWakeBit
 222  *
 223  * See "Windows Internals", p.449
 224  */
 225 void QUEUE_SetWakeBit( MESSAGEQUEUE *queue, WORD bit )
 226 {
 227     dprintf_msg(stddeb,"SetWakeBit: queue = %04x (wm=%04x), bit = %04x\n",
 228                         queue->self, queue->wakeMask, bit );
 229
 230     if (bit & QS_MOUSE) pMouseQueue = queue;
 231     if (bit & QS_KEY) pKbdQueue = queue;
 232     queue->changeBits |= bit;
 233     queue->wakeBits   |= bit;
 234     if (queue->wakeMask & bit)
 235     {
 236         queue->wakeMask = 0;
 237         PostEvent( queue->hTask );
 238     }
 239 }
 240
 241
 242 /***********************************************************************
 243  *           QUEUE_ClearWakeBit
 244  */
 245 void QUEUE_ClearWakeBit( MESSAGEQUEUE *queue, WORD bit )
 246 {
 247     queue->changeBits &= ~bit;
 248     queue->wakeBits   &= ~bit;
 249 }
 250
 251
 252 /***********************************************************************
 253  *           QUEUE_WaitBits
 254  *
 255  * See "Windows Internals", p.447
 256  */
 257 void QUEUE_WaitBits( WORD bits )
 258 {
 259     MESSAGEQUEUE *queue;
 260
 261     dprintf_msg(stddeb,"WaitBits: q %04x waiting for %04x\n", GetTaskQueue(0), bits);
 262
 263     for (;;)
 264     {
 265         if (!(queue = (MESSAGEQUEUE *)GlobalLock16( GetTaskQueue(0) ))) return;
 266
 267         if (queue->changeBits & bits)
 268         {
 269             /* One of the bits is set; we can return */
 270             queue->wakeMask = 0;
 271             return;
 272         }
 273         if (queue->wakeBits & QS_SENDMESSAGE)
 274         {
 275             /* Process the sent message immediately */
 276
 277             queue->wakeMask = 0;
 278             QUEUE_ReceiveMessage( queue );
 279             continue;                           /* nested sm crux */
 280         }
 281
 282         queue->wakeMask = bits | QS_SENDMESSAGE;
 283         if(queue->changeBits & bits) continue;
 284
 285         dprintf_msg(stddeb,"wb: (%04x) wakeMask is %04x, waiting\n", queue->self, queue->wakeMask);
 286
 287         WaitEvent( 0 );
 288     }
 289 }
 290
 291
 292 /***********************************************************************
 293  *           QUEUE_ReceiveMessage
 294  *
 295  * This routine is called when a sent message is waiting for the queue.
 296  */
 297 void QUEUE_ReceiveMessage( MESSAGEQUEUE *queue )
 298 {
 299     MESSAGEQUEUE *senderQ = NULL;
 300     HQUEUE16      prevSender = 0;
 301     QSMCTRL*      prevCtrlPtr = NULL;
 302     LRESULT       result = 0;
 303
 304     dprintf_msg(stddeb, "ReceiveMessage, queue %04x\n", queue->self );
 305     if (!(queue->wakeBits & QS_SENDMESSAGE) ||
 306         !(senderQ = (MESSAGEQUEUE*)GlobalLock16( queue->hSendingTask)))
 307         { dprintf_msg(stddeb,"\trcm: nothing to do\n"); return; }
 308
 309     queue->InSendMessageHandle = queue->hSendingTask;
 310     if( !(queue->hSendingTask = senderQ->hPrevSendingTask) )
 311     {
 312       queue->wakeBits &= ~QS_SENDMESSAGE;       /* no more sent messages */
 313       queue->changeBits &= ~QS_SENDMESSAGE;
 314     }
 315
 316     /* Remove sending queue from the list */
 317     prevSender                 = queue->InSendMessageHandle;
 318     prevCtrlPtr                = queue->smResultCurrent;
 319     queue->smResultCurrent     = senderQ->smResultInit;
 320
 321     dprintf_msg(stddeb, "\trcm: smResultCurrent = %08x, prevCtrl = %08x\n",
 322                                 (unsigned)queue->smResultCurrent, (unsigned)prevCtrlPtr );
 323     QUEUE_SetWakeBit( senderQ, QS_SMPARAMSFREE );
 324
 325     dprintf_msg(stddeb, "\trcm: calling wndproc - %04x %04x %04x %08x\n",
 326             senderQ->hWnd, senderQ->msg, senderQ->wParam, (unsigned)senderQ->lParam );
 327
 328     if (IsWindow( senderQ->hWnd ))
 329     {
 330         DWORD extraInfo = queue->GetMessageExtraInfoVal;
 331         queue->GetMessageExtraInfoVal = senderQ->GetMessageExtraInfoVal;
 332
 333         result = CallWindowProc16( (WNDPROC16)GetWindowLong16(senderQ->hWnd, GWL_WNDPROC),
 334                                    senderQ->hWnd, senderQ->msg, senderQ->wParam, senderQ->lParam );
 335
 336         queue->GetMessageExtraInfoVal = extraInfo;  /* Restore extra info */
 337         dprintf_msg(stddeb,"\trcm: result =  %08x\n", (unsigned)result );
 338     }
 339     else dprintf_msg(stddeb,"\trcm: bad hWnd\n");
 340
 341     /* Return the result to the sender task */
 342     ReplyMessage( result );
 343
 344     queue->InSendMessageHandle = prevSender;
 345     queue->smResultCurrent     = prevCtrlPtr;
 346
 347     dprintf_msg(stddeb,"ReceiveMessage: done!\n");
 348 }
 349
 350 /***********************************************************************
 351  *           QUEUE_FlushMessage
 352  *
 353  * Try to reply to all pending sent messages on exit.
 354  */
 355 void QUEUE_FlushMessages( HQUEUE16 hQueue )
 356 {
 357   MESSAGEQUEUE *queue = (MESSAGEQUEUE*)GlobalLock16( hQueue );
 358
 359   if( queue )
 360   {
 361     MESSAGEQUEUE *senderQ = (MESSAGEQUEUE*)GlobalLock16( queue->hSendingTask);
 362     QSMCTRL*      CtrlPtr = queue->smResultCurrent;
 363
 364     while( senderQ )
 365     {
 366       if( !(queue->hSendingTask = senderQ->hPrevSendingTask) )
 367             queue->wakeBits &= ~QS_SENDMESSAGE;
 368       QUEUE_SetWakeBit( senderQ, QS_SMPARAMSFREE );
 369
 370       queue->smResultCurrent = CtrlPtr;
 371       while( senderQ->wakeBits & QS_SMRESULT ) OldYield();
 372
 373       senderQ->SendMessageReturn = 0;
 374       senderQ->smResult = queue->smResultCurrent;
 375       QUEUE_SetWakeBit( senderQ, QS_SMRESULT);
 376
 377       if( (senderQ = (MESSAGEQUEUE*)GlobalLock16( queue->hSendingTask)) )
 378            CtrlPtr = senderQ->smResultInit;
 379     }
 380     queue->InSendMessageHandle = 0;
 381   }
 382 }
 383
 384 /***********************************************************************
 385  *           QUEUE_AddMsg
 386  *
 387  * Add a message to the queue. Return FALSE if queue is full.
 388  */
 389 BOOL32 QUEUE_AddMsg( HQUEUE16 hQueue, MSG16 * msg, DWORD extraInfo )
 390 {
 391     int pos;
 392     MESSAGEQUEUE *msgQueue;
 393
 394     SIGNAL_MaskAsyncEvents( TRUE );
 395
 396     if (!(msgQueue = (MESSAGEQUEUE *)GlobalLock16( hQueue ))) return FALSE;
 397     pos = msgQueue->nextFreeMessage;
 398
 399       /* Check if queue is full */
 400     if ((pos == msgQueue->nextMessage) && (msgQueue->msgCount > 0))
 401     {
 402         SIGNAL_MaskAsyncEvents( FALSE );
 403         fprintf(stderr,"MSG_AddMsg // queue is full !\n");
 404         return FALSE;
 405     }
 406
 407       /* Store message */
 408     msgQueue->messages[pos].msg = *msg;
 409     msgQueue->messages[pos].extraInfo = extraInfo;
 410     if (pos < msgQueue->queueSize-1) pos++;
 411     else pos = 0;
 412     msgQueue->nextFreeMessage = pos;
 413     msgQueue->msgCount++;
 414
 415     SIGNAL_MaskAsyncEvents( FALSE );
 416
 417     QUEUE_SetWakeBit( msgQueue, QS_POSTMESSAGE );
 418     return TRUE;
 419 }
 420
 421
 422 /***********************************************************************
 423  *           QUEUE_FindMsg
 424  *
 425  * Find a message matching the given parameters. Return -1 if none available.
 426  */
 427 int QUEUE_FindMsg( MESSAGEQUEUE * msgQueue, HWND32 hwnd, int first, int last )
 428 {
 429     int i, pos = msgQueue->nextMessage;
 430
 431     dprintf_msg(stddeb,"QUEUE_FindMsg: hwnd=%04x pos=%d\n", hwnd, pos );
 432
 433     if (!msgQueue->msgCount) return -1;
 434     if (!hwnd && !first && !last) return pos;
 435
 436     for (i = 0; i < msgQueue->msgCount; i++)
 437     {
 438         MSG16 * msg = &msgQueue->messages[pos].msg;
 439
 440         if (!hwnd || (msg->hwnd == hwnd))
 441         {
 442             if (!first && !last) return pos;
 443             if ((msg->message >= first) && (msg->message <= last)) return pos;
 444         }
 445         if (pos < msgQueue->queueSize-1) pos++;
 446         else pos = 0;
 447     }
 448     return -1;
 449 }
 450
 451
 452 /***********************************************************************
 453  *           QUEUE_RemoveMsg
 454  *
 455  * Remove a message from the queue (pos must be a valid position).
 456  */
 457 void QUEUE_RemoveMsg( MESSAGEQUEUE * msgQueue, int pos )
 458 {
 459     SIGNAL_MaskAsyncEvents( TRUE );
 460
 461     if (pos >= msgQueue->nextMessage)
 462     {
 463         for ( ; pos > msgQueue->nextMessage; pos--)
 464             msgQueue->messages[pos] = msgQueue->messages[pos-1];
 465         msgQueue->nextMessage++;
 466         if (msgQueue->nextMessage >= msgQueue->queueSize)
 467             msgQueue->nextMessage = 0;
 468     }
 469     else
 470     {
 471         for ( ; pos < msgQueue->nextFreeMessage; pos++)
 472             msgQueue->messages[pos] = msgQueue->messages[pos+1];
 473         if (msgQueue->nextFreeMessage) msgQueue->nextFreeMessage--;
 474         else msgQueue->nextFreeMessage = msgQueue->queueSize-1;
 475     }
 476     msgQueue->msgCount--;
 477     if (!msgQueue->msgCount) msgQueue->wakeBits &= ~QS_POSTMESSAGE;
 478
 479     SIGNAL_MaskAsyncEvents( FALSE );
 480 }
 481
 482
 483 /***********************************************************************
 484  *           QUEUE_WakeSomeone
 485  *
 486  * Wake a queue upon reception of a hardware event.
 487  */
 488 static void QUEUE_WakeSomeone( UINT message )
 489 {
 490     WND*          wndPtr = NULL;
 491     HWND          hwnd;
 492     WORD          wakeBit;
 493     MESSAGEQUEUE *queue = pCursorQueue;
 494
 495     if( (message >= WM_KEYFIRST) && (message <= WM_KEYLAST) )
 496     {
 497        wakeBit = QS_KEY;
 498        if( pActiveQueue ) queue = pActiveQueue;
 499     }
 500     else
 501     {
 502        wakeBit = (message == WM_MOUSEMOVE) ? QS_MOUSEMOVE : QS_MOUSEBUTTON;
 503        if( (hwnd = GetCapture32()) )
 504          if( (wndPtr = WIN_FindWndPtr( hwnd )) )
 505            queue = (MESSAGEQUEUE *)GlobalLock16( wndPtr->hmemTaskQ );
 506     }
 507
 508     if( (hwnd = GetSysModalWindow16()) )
 509       if( (wndPtr = WIN_FindWndPtr( hwnd )) )
 510         queue = (MESSAGEQUEUE *)GlobalLock16( wndPtr->hmemTaskQ );
 511
 512     if( !queue )
 513     {
 514       queue = GlobalLock16( hFirstQueue );
 515       while( queue )
 516       {
 517         if (queue->wakeMask & wakeBit) break;
 518         queue = GlobalLock16( queue->next );
 519       }
 520       if( !queue )
 521       {
 522         dprintf_msg(stddeb,"WakeSomeone: couldn't find queue\n");
 523         return;
 524       }
 525     }
 526
 527     QUEUE_SetWakeBit( queue, wakeBit );
 528 }
 529
 530
 531 /***********************************************************************
 532  *           hardware_event
 533  *
 534  * Add an event to the system message queue.
 535  * Note: the position is relative to the desktop window.
 536  */
 537 void hardware_event( WORD message, WORD wParam, LONG lParam,
 538                      int xPos, int yPos, DWORD time, DWORD extraInfo )
 539 {
 540     MSG16 *msg;
 541     int pos;
 542
 543     if (!sysMsgQueue) return;
 544     pos = sysMsgQueue->nextFreeMessage;
 545
 546       /* Merge with previous event if possible */
 547
 548     if ((message == WM_MOUSEMOVE) && sysMsgQueue->msgCount)
 549     {
 550         if (pos > 0) pos--;
 551         else pos = sysMsgQueue->queueSize - 1;
 552         msg = &sysMsgQueue->messages[pos].msg;
 553         if ((msg->message == message) && (msg->wParam == wParam))
 554             sysMsgQueue->msgCount--;  /* Merge events */
 555         else
 556             pos = sysMsgQueue->nextFreeMessage;  /* Don't merge */
 557     }
 558
 559       /* Check if queue is full */
 560
 561     if ((pos == sysMsgQueue->nextMessage) && sysMsgQueue->msgCount)
 562     {
 563         /* Queue is full, beep (but not on every mouse motion...) */
 564         if (message != WM_MOUSEMOVE) MessageBeep(0);
 565         return;
 566     }
 567
 568       /* Store message */
 569
 570     msg = &sysMsgQueue->messages[pos].msg;
 571     msg->hwnd    = 0;
 572     msg->message = message;
 573     msg->wParam  = wParam;
 574     msg->lParam  = lParam;
 575     msg->time    = time;
 576     msg->pt.x    = xPos & 0xffff;
 577     msg->pt.y    = yPos & 0xffff;
 578     sysMsgQueue->messages[pos].extraInfo = extraInfo;
 579     if (pos < sysMsgQueue->queueSize - 1) pos++;
 580     else pos = 0;
 581     sysMsgQueue->nextFreeMessage = pos;
 582     sysMsgQueue->msgCount++;
 583     QUEUE_WakeSomeone( message );
 584 }
 585
 586
 587 /***********************************************************************
 588  *           QUEUE_GetQueueTask
 589  */
 590 HTASK16 QUEUE_GetQueueTask( HQUEUE16 hQueue )
 591 {
 592     MESSAGEQUEUE *queue = GlobalLock16( hQueue );
 593     return (queue) ? queue->hTask : 0 ;
 594 }
 595
 596
 597 /***********************************************************************
 598  *           QUEUE_IncPaintCount
 599  */
 600 void QUEUE_IncPaintCount( HQUEUE16 hQueue )
 601 {
 602     MESSAGEQUEUE *queue;
 603
 604     if (!(queue = (MESSAGEQUEUE *)GlobalLock16( hQueue ))) return;
 605     queue->wPaintCount++;
 606     QUEUE_SetWakeBit( queue, QS_PAINT );
 607 }
 608
 609
 610 /***********************************************************************
 611  *           QUEUE_DecPaintCount
 612  */
 613 void QUEUE_DecPaintCount( HQUEUE16 hQueue )
 614 {
 615     MESSAGEQUEUE *queue;
 616
 617     if (!(queue = (MESSAGEQUEUE *)GlobalLock16( hQueue ))) return;
 618     queue->wPaintCount--;
 619     if (!queue->wPaintCount) queue->wakeBits &= ~QS_PAINT;
 620 }
 621
 622
 623 /***********************************************************************
 624  *           QUEUE_IncTimerCount
 625  */
 626 void QUEUE_IncTimerCount( HQUEUE16 hQueue )
 627 {
 628     MESSAGEQUEUE *queue;
 629
 630     if (!(queue = (MESSAGEQUEUE *)GlobalLock16( hQueue ))) return;
 631     queue->wTimerCount++;
 632     QUEUE_SetWakeBit( queue, QS_TIMER );
 633 }
 634
 635
 636 /***********************************************************************
 637  *           QUEUE_DecTimerCount
 638  */
 639 void QUEUE_DecTimerCount( HQUEUE16 hQueue )
 640 {
 641     MESSAGEQUEUE *queue;
 642
 643     if (!(queue = (MESSAGEQUEUE *)GlobalLock16( hQueue ))) return;
 644     queue->wTimerCount--;
 645     if (!queue->wTimerCount) queue->wakeBits &= ~QS_TIMER;
 646 }
 647
 648
 649 /***********************************************************************
 650  *           PostQuitMessage   (USER.6)
 651  */
 652 void PostQuitMessage( INT exitCode )
 653 {
 654     MESSAGEQUEUE *queue;
 655
 656     if (!(queue = (MESSAGEQUEUE *)GlobalLock16( GetTaskQueue(0) ))) return;
 657     queue->wPostQMsg = TRUE;
 658     queue->wExitCode = (WORD)exitCode;
 659 }
 660
 661
 662 /***********************************************************************
 663  *           GetWindowTask16   (USER.224)
 664  */
 665 HTASK16 GetWindowTask16( HWND16 hwnd )
 666 {
 667     WND *wndPtr = WIN_FindWndPtr( hwnd );
 668
 669     if (!wndPtr) return 0;
 670     return QUEUE_GetQueueTask( wndPtr->hmemTaskQ );
 671 }
 672
 673 /***********************************************************************
 674  *           GetWindowThreadProcessId   (USER32.312)
 675  */
 676 DWORD
 677 GetWindowThreadProcessId(HWND32 hwnd,LPDWORD process) {
 678     HTASK16 htask;
 679     TDB *tdb;
 680
 681     WND *wndPtr = WIN_FindWndPtr( hwnd );
 682
 683     if (!wndPtr) return 0;
 684     htask=QUEUE_GetQueueTask( wndPtr->hmemTaskQ );
 685     tdb = (TDB*)GlobalLock16(htask);
 686     if (!tdb) return 0;
 687     if (tdb->thdb) {
 688         if (process)
 689                 *process = (DWORD)tdb->thdb->process;
 690         return (DWORD)tdb->thdb;
 691     }
 692     return 0;
 693
 694 }
 695
 696
 697 /***********************************************************************
 698  *           SetMessageQueue   (USER.266)
 699  */
 700 BOOL SetMessageQueue( int size )
 701 {
 702     HQUEUE16 hQueue, hNewQueue;
 703     MESSAGEQUEUE *queuePtr;
 704
 705     dprintf_msg(stddeb,"SetMessageQueue: task %04x size %i\n", GetCurrentTask(), size);
 706
 707     if ((size > MAX_QUEUE_SIZE) || (size <= 0)) return TRUE;
 708
 709     if( !(hNewQueue = QUEUE_CreateMsgQueue( size )))
 710     {
 711         dprintf_msg(stddeb,"SetMessageQueue: failed!\n");
 712         return FALSE;
 713     }
 714     queuePtr = (MESSAGEQUEUE *)GlobalLock16( hNewQueue );
 715
 716     SIGNAL_MaskAsyncEvents( TRUE );
 717
 718     /* Copy data and free the old message queue */
 719     if ((hQueue = GetTaskQueue(0)) != 0)
 720     {
 721        MESSAGEQUEUE *oldQ = (MESSAGEQUEUE *)GlobalLock16( hQueue );
 722        memcpy( &queuePtr->reserved2, &oldQ->reserved2,
 723                         (int)oldQ->messages - (int)(&oldQ->reserved2) );
 724        HOOK_ResetQueueHooks( hNewQueue );
 725        if( WIN_GetDesktop()->hmemTaskQ == hQueue )
 726            WIN_GetDesktop()->hmemTaskQ = hNewQueue;
 727        WIN_ResetQueueWindows( WIN_GetDesktop()->child, hQueue, hNewQueue );
 728        QUEUE_DeleteMsgQueue( hQueue );
 729     }
 730
 731     /* Link new queue into list */
 732     queuePtr->hTask = GetCurrentTask();
 733     queuePtr->next  = hFirstQueue;
 734     hFirstQueue = hNewQueue;
 735
 736     if( !queuePtr->next ) pCursorQueue = queuePtr;
 737     SetTaskQueue( 0, hNewQueue );
 738
 739     SIGNAL_MaskAsyncEvents( FALSE );
 740     return TRUE;
 741 }
 742
 743
 744 /***********************************************************************
 745  *           GetQueueStatus   (USER.334)
 746  */
 747 DWORD GetQueueStatus( UINT flags )
 748 {
 749     MESSAGEQUEUE *queue;
 750     DWORD ret;
 751
 752     if (!(queue = (MESSAGEQUEUE *)GlobalLock16( GetTaskQueue(0) ))) return 0;
 753     ret = MAKELONG( queue->changeBits, queue->wakeBits );
 754     queue->changeBits = 0;
 755     return ret & MAKELONG( flags, flags );
 756 }
 757
 758
 759 /***********************************************************************
 760  *           GetInputState   (USER.335)
 761  */
 762 BOOL GetInputState()
 763 {
 764     MESSAGEQUEUE *queue;
 765
 766     if (!(queue = (MESSAGEQUEUE *)GlobalLock16( GetTaskQueue(0) ))) return FALSE;
 767     return queue->wakeBits & (QS_KEY | QS_MOUSEBUTTON);
 768 }
 769
 770
 771 /***********************************************************************
 772  *           GetMessagePos   (USER.119)
 773  */
 774 DWORD GetMessagePos(void)
 775 {
 776     MESSAGEQUEUE *queue;
 777
 778     if (!(queue = (MESSAGEQUEUE *)GlobalLock16( GetTaskQueue(0) ))) return 0;
 779     return queue->GetMessagePosVal;
 780 }
 781
 782
 783 /***********************************************************************
 784  *           GetMessageTime   (USER.120)
 785  */
 786 LONG GetMessageTime(void)
 787 {
 788     MESSAGEQUEUE *queue;
 789
 790     if (!(queue = (MESSAGEQUEUE *)GlobalLock16( GetTaskQueue(0) ))) return 0;
 791     return queue->GetMessageTimeVal;
 792 }
 793
 794
 795 /***********************************************************************
 796  *           GetMessageExtraInfo   (USER.288)
 797  */
 798 LONG GetMessageExtraInfo(void)
 799 {
 800     MESSAGEQUEUE *queue;
 801
 802     if (!(queue = (MESSAGEQUEUE *)GlobalLock16( GetTaskQueue(0) ))) return 0;
 803     return queue->GetMessageExtraInfoVal;
 804 }