windows/queue.c

   1 /* * Message queues related functions
   2  *
   3  * Copyright 1993, 1994 Alexandre Julliard
   4  */
   5
   6 #include <string.h>
   7 #include <signal.h>
   8 #include <assert.h>
   9 #include "windef.h"
  10 #include "wingdi.h"
  11 #include "wine/winbase16.h"
  12 #include "wine/winuser16.h"
  13 #include "miscemu.h"
  14 #include "syslevel.h"
  15 #include "module.h"
  16 #include "queue.h"
  17 #include "task.h"
  18 #include "win.h"
  19 #include "clipboard.h"
  20 #include "hook.h"
  21 #include "heap.h"
  22 #include "thread.h"
  23 #include "debugtools.h"
  24 #include "server.h"
  25 #include "spy.h"
  26
  27 DECLARE_DEBUG_CHANNEL(msg);
  28 DECLARE_DEBUG_CHANNEL(sendmsg);
  29
  30 #define MAX_QUEUE_SIZE   120  /* Max. size of a message queue */
  31
  32 static HQUEUE16 hFirstQueue = 0;
  33 static HQUEUE16 hExitingQueue = 0;
  34 static HQUEUE16 hmemSysMsgQueue = 0;
  35 static MESSAGEQUEUE *sysMsgQueue = NULL;
  36 static PERQUEUEDATA *pQDataWin16 = NULL;  /* Global perQData for Win16 tasks */
  37
  38 static MESSAGEQUEUE *pMouseQueue = NULL;  /* Queue for last mouse message */
  39 static MESSAGEQUEUE *pKbdQueue = NULL;    /* Queue for last kbd message */
  40
  41 HQUEUE16 hCursorQueue = 0;
  42 HQUEUE16 hActiveQueue = 0;
  43
  44
  45 /***********************************************************************
  46  *           PERQDATA_CreateInstance
  47  *
  48  * Creates an instance of a reference counted PERQUEUEDATA element
  49  * for the message queue. perQData is stored globally for 16 bit tasks.
  50  *
  51  * Note: We don't implement perQdata exactly the same way Windows does.
  52  * Each perQData element is reference counted since it may be potentially
  53  * shared by multiple message Queues (via AttachThreadInput).
  54  * We only store the current values for Active, Capture and focus windows
  55  * currently.
  56  */
  57 PERQUEUEDATA * PERQDATA_CreateInstance( )
  58 {
  59     PERQUEUEDATA *pQData;
  60
  61     BOOL16 bIsWin16 = 0;
  62
  63     TRACE_(msg)("()\n");
  64
  65     /* Share a single instance of perQData for all 16 bit tasks */
  66     if ( ( bIsWin16 = THREAD_IsWin16( NtCurrentTeb() ) ) )
  67     {
  68         /* If previously allocated, just bump up ref count */
  69         if ( pQDataWin16 )
  70         {
  71             PERQDATA_Addref( pQDataWin16 );
  72             return pQDataWin16;
  73         }
  74     }
  75
  76     /* Allocate PERQUEUEDATA from the system heap */
  77     if (!( pQData = (PERQUEUEDATA *) HeapAlloc( SystemHeap, 0,
  78                                                     sizeof(PERQUEUEDATA) ) ))
  79         return 0;
  80
  81     /* Initialize */
  82     pQData->hWndCapture = pQData->hWndFocus = pQData->hWndActive = 0;
  83     pQData->ulRefCount = 1;
  84     pQData->nCaptureHT = HTCLIENT;
  85
  86     /* Note: We have an independent critical section for the per queue data
  87      * since this may be shared by different threads. see AttachThreadInput()
  88      */
  89     InitializeCriticalSection( &pQData->cSection );
  90     /* FIXME: not all per queue data critical sections should be global */
  91     MakeCriticalSectionGlobal( &pQData->cSection );
  92
  93     /* Save perQData globally for 16 bit tasks */
  94     if ( bIsWin16 )
  95         pQDataWin16 = pQData;
  96
  97     return pQData;
  98 }
  99
 100
 101 /***********************************************************************
 102  *           PERQDATA_Addref
 103  *
 104  * Increment reference count for the PERQUEUEDATA instance
 105  * Returns reference count for debugging purposes
 106  */
 107 ULONG PERQDATA_Addref( PERQUEUEDATA *pQData )
 108 {
 109     assert(pQData != 0 );
 110     TRACE_(msg)("(): current refcount %lu ...\n", pQData->ulRefCount);
 111
 112     EnterCriticalSection( &pQData->cSection );
 113     ++pQData->ulRefCount;
 114     LeaveCriticalSection( &pQData->cSection );
 115
 116     return pQData->ulRefCount;
 117 }
 118
 119
 120 /***********************************************************************
 121  *           PERQDATA_Release
 122  *
 123  * Release a reference to a PERQUEUEDATA instance.
 124  * Destroy the instance if no more references exist
 125  * Returns reference count for debugging purposes
 126  */
 127 ULONG PERQDATA_Release( PERQUEUEDATA *pQData )
 128 {
 129     assert(pQData != 0 );
 130     TRACE_(msg)("(): current refcount %lu ...\n",
 131           (LONG)pQData->ulRefCount );
 132
 133     EnterCriticalSection( &pQData->cSection );
 134     if ( --pQData->ulRefCount == 0 )
 135     {
 136         LeaveCriticalSection( &pQData->cSection );
 137         DeleteCriticalSection( &pQData->cSection );
 138
 139         TRACE_(msg)("(): deleting PERQUEUEDATA instance ...\n" );
 140
 141         /* Deleting our global 16 bit perQData? */
 142         if ( pQData == pQDataWin16 )
 143             pQDataWin16 = 0;
 144
 145         /* Free the PERQUEUEDATA instance */
 146         HeapFree( SystemHeap, 0, pQData );
 147
 148         return 0;
 149     }
 150     LeaveCriticalSection( &pQData->cSection );
 151
 152     return pQData->ulRefCount;
 153 }
 154
 155
 156 /***********************************************************************
 157  *           PERQDATA_GetFocusWnd
 158  *
 159  * Get the focus hwnd member in a threadsafe manner
 160  */
 161 HWND PERQDATA_GetFocusWnd( PERQUEUEDATA *pQData )
 162 {
 163     HWND hWndFocus;
 164     assert(pQData != 0 );
 165
 166     EnterCriticalSection( &pQData->cSection );
 167     hWndFocus = pQData->hWndFocus;
 168     LeaveCriticalSection( &pQData->cSection );
 169
 170     return hWndFocus;
 171 }
 172
 173
 174 /***********************************************************************
 175  *           PERQDATA_SetFocusWnd
 176  *
 177  * Set the focus hwnd member in a threadsafe manner
 178  */
 179 HWND PERQDATA_SetFocusWnd( PERQUEUEDATA *pQData, HWND hWndFocus )
 180 {
 181     HWND hWndFocusPrv;
 182     assert(pQData != 0 );
 183
 184     EnterCriticalSection( &pQData->cSection );
 185     hWndFocusPrv = pQData->hWndFocus;
 186     pQData->hWndFocus = hWndFocus;
 187     LeaveCriticalSection( &pQData->cSection );
 188
 189     return hWndFocusPrv;
 190 }
 191
 192
 193 /***********************************************************************
 194  *           PERQDATA_GetActiveWnd
 195  *
 196  * Get the active hwnd member in a threadsafe manner
 197  */
 198 HWND PERQDATA_GetActiveWnd( PERQUEUEDATA *pQData )
 199 {
 200     HWND hWndActive;
 201     assert(pQData != 0 );
 202
 203     EnterCriticalSection( &pQData->cSection );
 204     hWndActive = pQData->hWndActive;
 205     LeaveCriticalSection( &pQData->cSection );
 206
 207     return hWndActive;
 208 }
 209
 210
 211 /***********************************************************************
 212  *           PERQDATA_SetActiveWnd
 213  *
 214  * Set the active focus hwnd member in a threadsafe manner
 215  */
 216 HWND PERQDATA_SetActiveWnd( PERQUEUEDATA *pQData, HWND hWndActive )
 217 {
 218     HWND hWndActivePrv;
 219     assert(pQData != 0 );
 220
 221     EnterCriticalSection( &pQData->cSection );
 222     hWndActivePrv = pQData->hWndActive;
 223     pQData->hWndActive = hWndActive;
 224     LeaveCriticalSection( &pQData->cSection );
 225
 226     return hWndActivePrv;
 227 }
 228
 229
 230 /***********************************************************************
 231  *           PERQDATA_GetCaptureWnd
 232  *
 233  * Get the capture hwnd member in a threadsafe manner
 234  */
 235 HWND PERQDATA_GetCaptureWnd( PERQUEUEDATA *pQData )
 236 {
 237     HWND hWndCapture;
 238     assert(pQData != 0 );
 239
 240     EnterCriticalSection( &pQData->cSection );
 241     hWndCapture = pQData->hWndCapture;
 242     LeaveCriticalSection( &pQData->cSection );
 243
 244     return hWndCapture;
 245 }
 246
 247
 248 /***********************************************************************
 249  *           PERQDATA_SetCaptureWnd
 250  *
 251  * Set the capture hwnd member in a threadsafe manner
 252  */
 253 HWND PERQDATA_SetCaptureWnd( PERQUEUEDATA *pQData, HWND hWndCapture )
 254 {
 255     HWND hWndCapturePrv;
 256     assert(pQData != 0 );
 257
 258     EnterCriticalSection( &pQData->cSection );
 259     hWndCapturePrv = pQData->hWndCapture;
 260     pQData->hWndCapture = hWndCapture;
 261     LeaveCriticalSection( &pQData->cSection );
 262
 263     return hWndCapturePrv;
 264 }
 265
 266
 267 /***********************************************************************
 268  *           PERQDATA_GetCaptureInfo
 269  *
 270  * Get the capture info member in a threadsafe manner
 271  */
 272 INT16 PERQDATA_GetCaptureInfo( PERQUEUEDATA *pQData )
 273 {
 274     INT16 nCaptureHT;
 275     assert(pQData != 0 );
 276
 277     EnterCriticalSection( &pQData->cSection );
 278     nCaptureHT = pQData->nCaptureHT;
 279     LeaveCriticalSection( &pQData->cSection );
 280
 281     return nCaptureHT;
 282 }
 283
 284
 285 /***********************************************************************
 286  *           PERQDATA_SetCaptureInfo
 287  *
 288  * Set the capture info member in a threadsafe manner
 289  */
 290 INT16 PERQDATA_SetCaptureInfo( PERQUEUEDATA *pQData, INT16 nCaptureHT )
 291 {
 292     INT16 nCaptureHTPrv;
 293     assert(pQData != 0 );
 294
 295     EnterCriticalSection( &pQData->cSection );
 296     nCaptureHTPrv = pQData->nCaptureHT;
 297     pQData->nCaptureHT = nCaptureHT;
 298     LeaveCriticalSection( &pQData->cSection );
 299
 300     return nCaptureHTPrv;
 301 }
 302
 303
 304 /***********************************************************************
 305  *           QUEUE_Lock
 306  *
 307  * Function for getting a 32 bit pointer on queue strcture. For thread
 308  * safeness programmers should use this function instead of GlobalLock to
 309  * retrieve a pointer on the structure. QUEUE_Unlock should also be called
 310  * when access to the queue structure is not required anymore.
 311  */
 312 MESSAGEQUEUE *QUEUE_Lock( HQUEUE16 hQueue )
 313 {
 314     MESSAGEQUEUE *queue;
 315
 316     HeapLock( SystemHeap );  /* FIXME: a bit overkill */
 317     queue = GlobalLock16( hQueue );
 318     if ( !queue || (queue->magic != QUEUE_MAGIC) )
 319     {
 320         HeapUnlock( SystemHeap );
 321         return NULL;
 322     }
 323
 324     queue->lockCount++;
 325     HeapUnlock( SystemHeap );
 326     return queue;
 327 }
 328
 329
 330 /***********************************************************************
 331  *           QUEUE_Unlock
 332  *
 333  * Use with QUEUE_Lock to get a thread safe access to message queue
 334  * structure
 335  */
 336 void QUEUE_Unlock( MESSAGEQUEUE *queue )
 337 {
 338     if (queue)
 339     {
 340         HeapLock( SystemHeap );  /* FIXME: a bit overkill */
 341
 342         if ( --queue->lockCount == 0 )
 343         {
 344             DeleteCriticalSection ( &queue->cSection );
 345             if (queue->server_queue)
 346                 CloseHandle( queue->server_queue );
 347             GlobalFree16( queue->self );
 348         }
 349
 350         HeapUnlock( SystemHeap );
 351     }
 352 }
 353
 354
 355 /***********************************************************************
 356  *           QUEUE_DumpQueue
 357  */
 358 void QUEUE_DumpQueue( HQUEUE16 hQueue )
 359 {
 360     MESSAGEQUEUE *pq;
 361
 362     if (!(pq = (MESSAGEQUEUE*) QUEUE_Lock( hQueue )) )
 363     {
 364         WARN_(msg)("%04x is not a queue handle\n", hQueue );
 365         return;
 366     }
 367
 368     DPRINTF( "next: %12.4x  Intertask SendMessage:\n"
 369              "thread: %10p  ----------------------\n"
 370              "firstMsg: %8p   smWaiting:     %10p\n"
 371              "lastMsg:  %8p   smPending:     %10p\n"
 372              "msgCount: %8.4x   smProcessing:  %10p\n"
 373              "lockCount: %7.4x\n"
 374              "wWinVer: %9.4x\n"
 375              "paints: %10.4x\n"
 376              "timers: %10.4x\n"
 377              "wakeBits: %8.4x\n"
 378              "wakeMask: %8.4x\n"
 379              "hCurHook: %8.4x\n",
 380              pq->next, pq->teb, pq->firstMsg, pq->smWaiting, pq->lastMsg,
 381              pq->smPending, pq->msgCount, pq->smProcessing,
 382              (unsigned)pq->lockCount, pq->wWinVersion,
 383              pq->wPaintCount, pq->wTimerCount,
 384              pq->wakeBits, pq->wakeMask, pq->hCurHook);
 385
 386     QUEUE_Unlock( pq );
 387 }
 388
 389
 390 /***********************************************************************
 391  *           QUEUE_WalkQueues
 392  */
 393 void QUEUE_WalkQueues(void)
 394 {
 395     char module[10];
 396     HQUEUE16 hQueue = hFirstQueue;
 397
 398     DPRINTF( "Queue Msgs Thread   Task Module\n" );
 399     while (hQueue)
 400     {
 401         MESSAGEQUEUE *queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue );
 402         if (!queue)
 403         {
 404             WARN_(msg)("Bad queue handle %04x\n", hQueue );
 405             return;
 406         }
 407         if (!GetModuleName16( queue->teb->htask16, module, sizeof(module )))
 408             strcpy( module, "???" );
 409         DPRINTF( "%04x %4d %p %04x %s\n", hQueue,queue->msgCount,
 410                  queue->teb, queue->teb->htask16, module );
 411         hQueue = queue->next;
 412         QUEUE_Unlock( queue );
 413     }
 414     DPRINTF( "\n" );
 415 }
 416
 417
 418 /***********************************************************************
 419  *           QUEUE_IsExitingQueue
 420  */
 421 BOOL QUEUE_IsExitingQueue( HQUEUE16 hQueue )
 422 {
 423     return (hExitingQueue && (hQueue == hExitingQueue));
 424 }
 425
 426
 427 /***********************************************************************
 428  *           QUEUE_SetExitingQueue
 429  */
 430 void QUEUE_SetExitingQueue( HQUEUE16 hQueue )
 431 {
 432     hExitingQueue = hQueue;
 433 }
 434
 435
 436 /***********************************************************************
 437  *           QUEUE_CreateMsgQueue
 438  *
 439  * Creates a message queue. Doesn't link it into queue list!
 440  */
 441 static HQUEUE16 QUEUE_CreateMsgQueue( BOOL16 bCreatePerQData )
 442 {
 443     HQUEUE16 hQueue;
 444     MESSAGEQUEUE * msgQueue;
 445     TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
 446     struct get_msg_queue_request *req = get_req_buffer();
 447
 448     TRACE_(msg)("(): Creating message queue...\n");
 449
 450     if (!(hQueue = GlobalAlloc16( GMEM_FIXED | GMEM_ZEROINIT,
 451                                   sizeof(MESSAGEQUEUE) )))
 452         return 0;
 453
 454     msgQueue = (MESSAGEQUEUE *) GlobalLock16( hQueue );
 455     if ( !msgQueue )
 456         return 0;
 457
 458     if (server_call( REQ_GET_MSG_QUEUE ))
 459     {
 460         ERR_(msg)("Cannot get thread queue");
 461         GlobalFree16( hQueue );
 462         return 0;
 463     }
 464     msgQueue->server_queue = req->handle;
 465     msgQueue->server_queue = ConvertToGlobalHandle( msgQueue->server_queue );
 466
 467     msgQueue->self        = hQueue;
 468     msgQueue->wakeBits    = msgQueue->changeBits = 0;
 469     msgQueue->wWinVersion = pTask ? pTask->version : 0;
 470
 471     InitializeCriticalSection( &msgQueue->cSection );
 472     MakeCriticalSectionGlobal( &msgQueue->cSection );
 473
 474     msgQueue->lockCount = 1;
 475     msgQueue->magic = QUEUE_MAGIC;
 476
 477     /* Create and initialize our per queue data */
 478     msgQueue->pQData = bCreatePerQData ? PERQDATA_CreateInstance() : NULL;
 479
 480     return hQueue;
 481 }
 482
 483
 484 /***********************************************************************
 485  *           QUEUE_FlushMessage
 486  *
 487  * Try to reply to all pending sent messages on exit.
 488  */
 489 static void QUEUE_FlushMessages( MESSAGEQUEUE *queue )
 490 {
 491     SMSG *smsg;
 492     MESSAGEQUEUE *senderQ = 0;
 493
 494     if( queue )
 495     {
 496         EnterCriticalSection( &queue->cSection );
 497
 498         /* empty the list of pending SendMessage waiting to be received */
 499         while (queue->smPending)
 500         {
 501             smsg = QUEUE_RemoveSMSG( queue, SM_PENDING_LIST, 0);
 502
 503             senderQ = (MESSAGEQUEUE*)QUEUE_Lock( smsg->hSrcQueue );
 504             if ( !senderQ )
 505                 continue;
 506
 507             /* return 0, to unblock other thread */
 508             smsg->lResult = 0;
 509             smsg->flags |= SMSG_HAVE_RESULT;
 510             QUEUE_SetWakeBit( senderQ, QS_SMRESULT);
 511
 512             QUEUE_Unlock( senderQ );
 513         }
 514
 515         QUEUE_ClearWakeBit( queue, QS_SENDMESSAGE );
 516
 517         LeaveCriticalSection( &queue->cSection );
 518     }
 519 }
 520
 521
 522 /***********************************************************************
 523  *           QUEUE_DeleteMsgQueue
 524  *
 525  * Unlinks and deletes a message queue.
 526  *
 527  * Note: We need to mask asynchronous events to make sure PostMessage works
 528  * even in the signal handler.
 529  */
 530 BOOL QUEUE_DeleteMsgQueue( HQUEUE16 hQueue )
 531 {
 532     MESSAGEQUEUE * msgQueue = (MESSAGEQUEUE*)QUEUE_Lock(hQueue);
 533     HQUEUE16 *pPrev;
 534
 535     TRACE_(msg)("(): Deleting message queue %04x\n", hQueue);
 536
 537     if (!hQueue || !msgQueue)
 538     {
 539         WARN_(msg)("invalid argument.\n");
 540         return 0;
 541     }
 542
 543     msgQueue->magic = 0;
 544
 545     if( hCursorQueue == hQueue ) hCursorQueue = 0;
 546     if( hActiveQueue == hQueue ) hActiveQueue = 0;
 547
 548     /* flush sent messages */
 549     QUEUE_FlushMessages( msgQueue );
 550
 551     HeapLock( SystemHeap );  /* FIXME: a bit overkill */
 552
 553     /* Release per queue data if present */
 554     if ( msgQueue->pQData )
 555     {
 556         PERQDATA_Release( msgQueue->pQData );
 557         msgQueue->pQData = 0;
 558     }
 559
 560     /* remove the message queue from the global link list */
 561     pPrev = &hFirstQueue;
 562     while (*pPrev && (*pPrev != hQueue))
 563     {
 564         MESSAGEQUEUE *msgQ = (MESSAGEQUEUE*)GlobalLock16(*pPrev);
 565
 566         /* sanity check */
 567         if ( !msgQ || (msgQ->magic != QUEUE_MAGIC) )
 568         {
 569             /* HQUEUE link list is corrupted, try to exit gracefully */
 570             WARN_(msg)("HQUEUE link list corrupted!\n");
 571             pPrev = 0;
 572             break;
 573         }
 574         pPrev = &msgQ->next;
 575     }
 576     if (pPrev && *pPrev) *pPrev = msgQueue->next;
 577     msgQueue->self = 0;
 578
 579     HeapUnlock( SystemHeap );
 580
 581     /* free up resource used by MESSAGEQUEUE strcture */
 582     msgQueue->lockCount--;
 583     QUEUE_Unlock( msgQueue );
 584
 585     return 1;
 586 }
 587
 588
 589 /***********************************************************************
 590  *           QUEUE_CreateSysMsgQueue
 591  *
 592  * Create the system message queue, and set the double-click speed.
 593  * Must be called only once.
 594  */
 595 BOOL QUEUE_CreateSysMsgQueue( int size )
 596 {
 597     /* Note: We dont need perQ data for the system message queue */
 598     if (!(hmemSysMsgQueue = QUEUE_CreateMsgQueue( FALSE )))
 599         return FALSE;
 600
 601     sysMsgQueue = (MESSAGEQUEUE *) GlobalLock16( hmemSysMsgQueue );
 602     return TRUE;
 603 }
 604
 605
 606 /***********************************************************************
 607  *           QUEUE_GetSysQueue
 608  */
 609 MESSAGEQUEUE *QUEUE_GetSysQueue(void)
 610 {
 611     return sysMsgQueue;
 612 }
 613
 614
 615 /***********************************************************************
 616  *           QUEUE_SetWakeBit
 617  *
 618  * See "Windows Internals", p.449
 619  */
 620 void QUEUE_SetWakeBit( MESSAGEQUEUE *queue, WORD bit )
 621 {
 622     TRACE_(msg)("queue = %04x (wm=%04x), bit = %04x\n",
 623                         queue->self, queue->wakeMask, bit );
 624
 625     if (bit & QS_MOUSE) pMouseQueue = queue;
 626     if (bit & QS_KEY) pKbdQueue = queue;
 627     queue->changeBits |= bit;
 628     queue->wakeBits   |= bit;
 629     if (queue->wakeMask & bit)
 630     {
 631         queue->wakeMask = 0;
 632
 633         /* Wake up thread waiting for message */
 634         if ( THREAD_IsWin16( queue->teb ) )
 635         {
 636             int iWndsLock = WIN_SuspendWndsLock();
 637             PostEvent16( queue->teb->htask16 );
 638             WIN_RestoreWndsLock( iWndsLock );
 639         }
 640         else
 641         {
 642             struct wake_queue_request *req = get_req_buffer();
 643             req->handle = queue->server_queue;
 644             req->bits   = bit;
 645             server_call( REQ_WAKE_QUEUE );
 646         }
 647     }
 648 }
 649
 650
 651 /***********************************************************************
 652  *           QUEUE_ClearWakeBit
 653  */
 654 void QUEUE_ClearWakeBit( MESSAGEQUEUE *queue, WORD bit )
 655 {
 656     queue->changeBits &= ~bit;
 657     queue->wakeBits   &= ~bit;
 658 }
 659
 660
 661 /***********************************************************************
 662  *           QUEUE_WaitBits
 663  *
 664  * See "Windows Internals", p.447
 665  *
 666  * return values:
 667  *    0 if exit with timeout
 668  *    1 otherwise
 669  */
 670 int QUEUE_WaitBits( WORD bits, DWORD timeout )
 671 {
 672     MESSAGEQUEUE *queue;
 673     DWORD curTime = 0;
 674     HQUEUE16 hQueue;
 675
 676     TRACE_(msg)("q %04x waiting for %04x\n", GetFastQueue16(), bits);
 677
 678     if ( THREAD_IsWin16( NtCurrentTeb() ) && (timeout != INFINITE) )
 679         curTime = GetTickCount();
 680
 681     hQueue = GetFastQueue16();
 682     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return 0;
 683
 684     for (;;)
 685     {
 686         if (queue->changeBits & bits)
 687         {
 688             /* One of the bits is set; we can return */
 689             queue->wakeMask = 0;
 690             QUEUE_Unlock( queue );
 691             return 1;
 692         }
 693         if (queue->wakeBits & QS_SENDMESSAGE)
 694         {
 695             /* Process the sent message immediately */
 696
 697             queue->wakeMask = 0;
 698             QUEUE_ReceiveMessage( queue );
 699             continue;                           /* nested sm crux */
 700         }
 701
 702         queue->wakeMask = bits | QS_SENDMESSAGE;
 703         if(queue->changeBits & bits)
 704         {
 705             continue;
 706         }
 707
 708         TRACE_(msg)("%04x) wakeMask is %04x, waiting\n", queue->self, queue->wakeMask);
 709
 710         if ( !THREAD_IsWin16( NtCurrentTeb() ) )
 711         {
 712             BOOL                bHasWin16Lock;
 713             DWORD               dwlc;
 714
 715             if ( (bHasWin16Lock = _ConfirmWin16Lock()) )
 716             {
 717                 TRACE_(msg)("bHasWin16Lock=TRUE\n");
 718                 ReleaseThunkLock( &dwlc );
 719             }
 720
 721             WaitForSingleObject( queue->server_queue, timeout );
 722
 723             if ( bHasWin16Lock )
 724             {
 725                 RestoreThunkLock( dwlc );
 726             }
 727         }
 728         else
 729         {
 730             if ( timeout == INFINITE )
 731                 WaitEvent16( 0 );  /* win 16 thread, use WaitEvent */
 732             else
 733             {
 734                 /* check for timeout, then give control to other tasks */
 735                 if (GetTickCount() - curTime > timeout)
 736                 {
 737
 738                     QUEUE_Unlock( queue );
 739                     return 0;   /* exit with timeout */
 740                 }
 741                 Yield16();
 742             }
 743         }
 744     }
 745 }
 746
 747
 748 /***********************************************************************
 749  *           QUEUE_AddSMSG
 750  *
 751  * This routine is called when a SMSG need to be added to one of the three
 752  * SM list.  (SM_PROCESSING_LIST, SM_PENDING_LIST, SM_WAITING_LIST)
 753  */
 754 BOOL QUEUE_AddSMSG( MESSAGEQUEUE *queue, int list, SMSG *smsg )
 755 {
 756     TRACE_(sendmsg)("queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
 757           smsg, SPY_GetMsgName(smsg->msg));
 758
 759     switch (list)
 760     {
 761         case SM_PROCESSING_LIST:
 762             /* don't need to be thread safe, only accessed by the
 763              thread associated with the sender queue */
 764             smsg->nextProcessing = queue->smProcessing;
 765             queue->smProcessing = smsg;
 766             break;
 767
 768         case SM_WAITING_LIST:
 769             /* don't need to be thread safe, only accessed by the
 770              thread associated with the receiver queue */
 771             smsg->nextWaiting = queue->smWaiting;
 772             queue->smWaiting = smsg;
 773             break;
 774
 775         case SM_PENDING_LIST:
 776         {
 777             /* make it thread safe, could be accessed by the sender and
 778              receiver thread */
 779             SMSG **prev;
 780
 781             EnterCriticalSection( &queue->cSection );
 782             smsg->nextPending = NULL;
 783             prev = &queue->smPending;
 784             while ( *prev )
 785                 prev = &(*prev)->nextPending;
 786             *prev = smsg;
 787             LeaveCriticalSection( &queue->cSection );
 788
 789             QUEUE_SetWakeBit( queue, QS_SENDMESSAGE );
 790             break;
 791         }
 792
 793         default:
 794             WARN_(sendmsg)("Invalid list: %d", list);
 795             break;
 796     }
 797
 798     return TRUE;
 799 }
 800
 801
 802 /***********************************************************************
 803  *           QUEUE_RemoveSMSG
 804  *
 805  * This routine is called when a SMSG need to be remove from one of the three
 806  * SM list.  (SM_PROCESSING_LIST, SM_PENDING_LIST, SM_WAITING_LIST)
 807  * If smsg == 0, remove the first smsg from the specified list
 808  */
 809 SMSG *QUEUE_RemoveSMSG( MESSAGEQUEUE *queue, int list, SMSG *smsg )
 810 {
 811
 812     switch (list)
 813     {
 814         case SM_PROCESSING_LIST:
 815             /* don't need to be thread safe, only accessed by the
 816              thread associated with the sender queue */
 817
 818             /* if smsg is equal to null, it means the first in the list */
 819             if (!smsg)
 820                 smsg = queue->smProcessing;
 821
 822             TRACE_(sendmsg)("queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
 823                   smsg, SPY_GetMsgName(smsg->msg));
 824             /* In fact SM_PROCESSING_LIST is a stack, and smsg
 825              should be always at the top of the list */
 826             if ( (smsg != queue->smProcessing) || !queue->smProcessing )
 827         {
 828                 ERR_(sendmsg)("smsg not at the top of Processing list, smsg=0x%p queue=0x%p", smsg, queue);
 829                 return 0;
 830             }
 831             else
 832             {
 833                 queue->smProcessing = smsg->nextProcessing;
 834                 smsg->nextProcessing = 0;
 835         }
 836             return smsg;
 837
 838         case SM_WAITING_LIST:
 839             /* don't need to be thread safe, only accessed by the
 840              thread associated with the receiver queue */
 841
 842             /* if smsg is equal to null, it means the first in the list */
 843             if (!smsg)
 844                 smsg = queue->smWaiting;
 845
 846             TRACE_(sendmsg)("queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
 847                   smsg, SPY_GetMsgName(smsg->msg));
 848             /* In fact SM_WAITING_LIST is a stack, and smsg
 849              should be always at the top of the list */
 850             if ( (smsg != queue->smWaiting) || !queue->smWaiting )
 851             {
 852                 ERR_(sendmsg)("smsg not at the top of Waiting list, smsg=0x%p queue=0x%p", smsg, queue);
 853                 return 0;
 854             }
 855             else
 856             {
 857                 queue->smWaiting = smsg->nextWaiting;
 858                 smsg->nextWaiting = 0;
 859     }
 860             return smsg;
 861
 862         case SM_PENDING_LIST:
 863             /* make it thread safe, could be accessed by the sender and
 864              receiver thread */
 865             EnterCriticalSection( &queue->cSection );
 866
 867             if (!smsg || !queue->smPending)
 868                 smsg = queue->smPending;
 869             else
 870             {
 871                 ERR_(sendmsg)("should always remove the top one in Pending list, smsg=0x%p queue=0x%p", smsg, queue);
 872                                 LeaveCriticalSection( &queue->cSection );
 873                 return 0;
 874             }
 875
 876             TRACE_(sendmsg)("queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
 877                   smsg, SPY_GetMsgName(smsg->msg));
 878
 879             queue->smPending = smsg->nextPending;
 880             smsg->nextPending = 0;
 881
 882             /* if no more SMSG in Pending list, clear QS_SENDMESSAGE flag */
 883             if (!queue->smPending)
 884                 QUEUE_ClearWakeBit( queue, QS_SENDMESSAGE );
 885
 886             LeaveCriticalSection( &queue->cSection );
 887             return smsg;
 888
 889         default:
 890             WARN_(sendmsg)("Invalid list: %d", list);
 891             break;
 892     }
 893
 894     return 0;
 895 }
 896
 897
 898 /***********************************************************************
 899  *           QUEUE_ReceiveMessage
 900  *
 901  * This routine is called when a sent message is waiting for the queue.
 902  */
 903 void QUEUE_ReceiveMessage( MESSAGEQUEUE *queue )
 904 {
 905     LRESULT       result = 0;
 906     SMSG          *smsg;
 907     MESSAGEQUEUE  *senderQ;
 908
 909     TRACE_(sendmsg)("queue %04x\n", queue->self );
 910
 911     if ( !(queue->wakeBits & QS_SENDMESSAGE) && queue->smPending )
 912     {
 913         TRACE_(sendmsg)("\trcm: nothing to do\n");
 914         return;
 915     }
 916
 917     /* remove smsg on the top of the pending list and put it in the processing list */
 918     smsg = QUEUE_RemoveSMSG(queue, SM_PENDING_LIST, 0);
 919     QUEUE_AddSMSG(queue, SM_WAITING_LIST, smsg);
 920
 921     TRACE_(sendmsg)("RM: %s [%04x] (%04x -> %04x)\n",
 922             SPY_GetMsgName(smsg->msg), smsg->msg, smsg->hSrcQueue, smsg->hDstQueue );
 923
 924     if (IsWindow( smsg->hWnd ))
 925     {
 926         WND *wndPtr = WIN_FindWndPtr( smsg->hWnd );
 927         DWORD extraInfo = queue->GetMessageExtraInfoVal; /* save ExtraInfo */
 928
 929         /* use sender queue extra info value while calling the window proc */
 930         senderQ = (MESSAGEQUEUE*)QUEUE_Lock( smsg->hSrcQueue );
 931         if (senderQ)
 932   {
 933             queue->GetMessageExtraInfoVal = senderQ->GetMessageExtraInfoVal;
 934             QUEUE_Unlock( senderQ );
 935         }
 936
 937         /* call the right version of CallWindowProcXX */
 938         if (smsg->flags & SMSG_WIN32)
 939         {
 940             TRACE_(sendmsg)("\trcm: msg is Win32\n" );
 941             if (smsg->flags & SMSG_UNICODE)
 942                 result = CallWindowProcW( wndPtr->winproc,
 943                                             smsg->hWnd, smsg->msg,
 944                                             smsg->wParam, smsg->lParam );
 945             else
 946                 result = CallWindowProcA( wndPtr->winproc,
 947                                             smsg->hWnd, smsg->msg,
 948                                             smsg->wParam, smsg->lParam );
 949         }
 950         else  /* Win16 message */
 951             result = CallWindowProc16( (WNDPROC16)wndPtr->winproc,
 952                                        (HWND16) smsg->hWnd,
 953                                        (UINT16) smsg->msg,
 954                                        LOWORD (smsg->wParam),
 955                                        smsg->lParam );
 956
 957         queue->GetMessageExtraInfoVal = extraInfo;  /* Restore extra info */
 958         WIN_ReleaseWndPtr(wndPtr);
 959         TRACE_(sendmsg)("result =  %08x\n", (unsigned)result );
 960     }
 961     else WARN_(sendmsg)("\trcm: bad hWnd\n");
 962
 963
 964         /* set SMSG_SENDING_REPLY flag to tell ReplyMessage16, it's not
 965          an early reply */
 966         smsg->flags |= SMSG_SENDING_REPLY;
 967         ReplyMessage( result );
 968
 969     TRACE_(sendmsg)("done! \n" );
 970 }
 971
 972
 973
 974 /***********************************************************************
 975  *           QUEUE_AddMsg
 976  *
 977  * Add a message to the queue. Return FALSE if queue is full.
 978  */
 979 BOOL QUEUE_AddMsg( HQUEUE16 hQueue, int type, MSG *msg, DWORD extraInfo )
 980 {
 981     MESSAGEQUEUE *msgQueue;
 982     QMSG         *qmsg;
 983
 984
 985     if (!(msgQueue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return FALSE;
 986
 987     /* allocate new message in global heap for now */
 988     if (!(qmsg = (QMSG *) HeapAlloc( SystemHeap, 0, sizeof(QMSG) ) ))
 989     {
 990         QUEUE_Unlock( msgQueue );
 991         return 0;
 992     }
 993
 994     EnterCriticalSection( &msgQueue->cSection );
 995
 996       /* Store message */
 997     qmsg->type = type;
 998     qmsg->msg = *msg;
 999     qmsg->extraInfo = extraInfo;
1000
1001     /* insert the message in the link list */
1002     qmsg->nextMsg = 0;
1003     qmsg->prevMsg = msgQueue->lastMsg;
1004
1005     if (msgQueue->lastMsg)
1006         msgQueue->lastMsg->nextMsg = qmsg;
1007
1008     /* update first and last anchor in message queue */
1009     msgQueue->lastMsg = qmsg;
1010     if (!msgQueue->firstMsg)
1011         msgQueue->firstMsg = qmsg;
1012
1013     msgQueue->msgCount++;
1014
1015     LeaveCriticalSection( &msgQueue->cSection );
1016
1017     QUEUE_SetWakeBit( msgQueue, QS_POSTMESSAGE );
1018     QUEUE_Unlock( msgQueue );
1019
1020     return TRUE;
1021 }
1022
1023
1024
1025 /***********************************************************************
1026  *           QUEUE_FindMsg
1027  *
1028  * Find a message matching the given parameters. Return -1 if none available.
1029  */
1030 QMSG* QUEUE_FindMsg( MESSAGEQUEUE * msgQueue, HWND hwnd, int first, int last )
1031 {
1032     QMSG* qmsg;
1033
1034     EnterCriticalSection( &msgQueue->cSection );
1035
1036     if (!msgQueue->msgCount)
1037         qmsg = 0;
1038     else if (!hwnd && !first && !last)
1039         qmsg = msgQueue->firstMsg;
1040     else
1041     {
1042         /* look in linked list for message matching first and last criteria */
1043         for (qmsg = msgQueue->firstMsg; qmsg; qmsg = qmsg->nextMsg)
1044     {
1045             MSG *msg = &(qmsg->msg);
1046
1047         if (!hwnd || (msg->hwnd == hwnd))
1048         {
1049                 if (!first && !last)
1050                     break;   /* found it */
1051
1052                 if ((msg->message >= first) && (!last || (msg->message <= last)))
1053                     break;   /* found it */
1054             }
1055         }
1056     }
1057
1058     LeaveCriticalSection( &msgQueue->cSection );
1059
1060     return qmsg;
1061 }
1062
1063
1064
1065 /***********************************************************************
1066  *           QUEUE_RemoveMsg
1067  *
1068  * Remove a message from the queue (pos must be a valid position).
1069  */
1070 void QUEUE_RemoveMsg( MESSAGEQUEUE * msgQueue, QMSG *qmsg )
1071 {
1072     EnterCriticalSection( &msgQueue->cSection );
1073
1074     /* set the linked list */
1075     if (qmsg->prevMsg)
1076         qmsg->prevMsg->nextMsg = qmsg->nextMsg;
1077
1078     if (qmsg->nextMsg)
1079         qmsg->nextMsg->prevMsg = qmsg->prevMsg;
1080
1081     if (msgQueue->firstMsg == qmsg)
1082         msgQueue->firstMsg = qmsg->nextMsg;
1083
1084     if (msgQueue->lastMsg == qmsg)
1085         msgQueue->lastMsg = qmsg->prevMsg;
1086
1087     /* deallocate the memory for the message */
1088     HeapFree( SystemHeap, 0, qmsg );
1089
1090     msgQueue->msgCount--;
1091     if (!msgQueue->msgCount) msgQueue->wakeBits &= ~QS_POSTMESSAGE;
1092
1093     LeaveCriticalSection( &msgQueue->cSection );
1094 }
1095
1096
1097 /***********************************************************************
1098  *           QUEUE_WakeSomeone
1099  *
1100  * Wake a queue upon reception of a hardware event.
1101  */
1102 static void QUEUE_WakeSomeone( UINT message )
1103 {
1104     WND*          wndPtr = NULL;
1105     WORD          wakeBit;
1106     HWND hwnd;
1107     HQUEUE16     hQueue = 0;
1108     MESSAGEQUEUE *queue = NULL;
1109
1110     if (hCursorQueue)
1111         hQueue = hCursorQueue;
1112
1113     if( (message >= WM_KEYFIRST) && (message <= WM_KEYLAST) )
1114     {
1115        wakeBit = QS_KEY;
1116        if( hActiveQueue )
1117            hQueue = hActiveQueue;
1118     }
1119     else
1120     {
1121        wakeBit = (message == WM_MOUSEMOVE) ? QS_MOUSEMOVE : QS_MOUSEBUTTON;
1122        if( (hwnd = GetCapture()) )
1123          if( (wndPtr = WIN_FindWndPtr( hwnd )) )
1124            {
1125                hQueue = wndPtr->hmemTaskQ;
1126                WIN_ReleaseWndPtr(wndPtr);
1127            }
1128     }
1129
1130     if( (hwnd = GetSysModalWindow16()) )
1131     {
1132       if( (wndPtr = WIN_FindWndPtr( hwnd )) )
1133         {
1134             hQueue = wndPtr->hmemTaskQ;
1135             WIN_ReleaseWndPtr(wndPtr);
1136         }
1137     }
1138
1139     if (hQueue)
1140         queue = QUEUE_Lock( hQueue );
1141
1142     if( !queue )
1143     {
1144         queue = QUEUE_Lock( hFirstQueue );
1145       while( queue )
1146       {
1147         if (queue->wakeMask & wakeBit) break;
1148
1149             QUEUE_Unlock(queue);
1150             queue = QUEUE_Lock( queue->next );
1151       }
1152       if( !queue )
1153       {
1154         WARN_(msg)("couldn't find queue\n");
1155         return;
1156       }
1157     }
1158
1159     QUEUE_SetWakeBit( queue, wakeBit );
1160
1161     QUEUE_Unlock( queue );
1162 }
1163
1164
1165 /***********************************************************************
1166  *           hardware_event
1167  *
1168  * Add an event to the system message queue.
1169  * Note: the position is relative to the desktop window.
1170  */
1171 void hardware_event( UINT message, WPARAM wParam, LPARAM lParam,
1172                      int xPos, int yPos, DWORD time, DWORD extraInfo )
1173 {
1174     MSG *msg;
1175     QMSG  *qmsg;
1176     int  mergeMsg = 0;
1177
1178     if (!sysMsgQueue) return;
1179
1180     EnterCriticalSection( &sysMsgQueue->cSection );
1181
1182     /* Merge with previous event if possible */
1183     qmsg = sysMsgQueue->lastMsg;
1184
1185     if ((message == WM_MOUSEMOVE) && sysMsgQueue->lastMsg)
1186     {
1187         msg = &(sysMsgQueue->lastMsg->msg);
1188
1189         if ((msg->message == message) && (msg->wParam == wParam))
1190         {
1191             /* Merge events */
1192             qmsg = sysMsgQueue->lastMsg;
1193             mergeMsg = 1;
1194     }
1195     }
1196
1197     if (!mergeMsg)
1198     {
1199         /* Should I limit the number of message in
1200           the system message queue??? */
1201
1202         /* Don't merge allocate a new msg in the global heap */
1203
1204         if (!(qmsg = (QMSG *) HeapAlloc( SystemHeap, 0, sizeof(QMSG) ) ))
1205         {
1206             LeaveCriticalSection( &sysMsgQueue->cSection );
1207             return;
1208         }
1209
1210         /* put message at the end of the linked list */
1211         qmsg->nextMsg = 0;
1212         qmsg->prevMsg = sysMsgQueue->lastMsg;
1213
1214         if (sysMsgQueue->lastMsg)
1215             sysMsgQueue->lastMsg->nextMsg = qmsg;
1216
1217         /* set last and first anchor index in system message queue */
1218         sysMsgQueue->lastMsg = qmsg;
1219         if (!sysMsgQueue->firstMsg)
1220             sysMsgQueue->firstMsg = qmsg;
1221
1222         sysMsgQueue->msgCount++;
1223     }
1224
1225       /* Store message */
1226     msg = &(qmsg->msg);
1227     msg->hwnd    = 0;
1228     msg->message = message;
1229     msg->wParam  = wParam;
1230     msg->lParam  = lParam;
1231     msg->time    = time;
1232     msg->pt.x    = xPos;
1233     msg->pt.y    = yPos;
1234     qmsg->extraInfo = extraInfo;
1235     qmsg->type      = QMSG_HARDWARE;
1236
1237     LeaveCriticalSection( &sysMsgQueue->cSection );
1238
1239     QUEUE_WakeSomeone( message );
1240 }
1241
1242
1243 /***********************************************************************
1244  *           QUEUE_GetQueueTask
1245  */
1246 HTASK16 QUEUE_GetQueueTask( HQUEUE16 hQueue )
1247 {
1248     HTASK16 hTask = 0;
1249
1250     MESSAGEQUEUE *queue = QUEUE_Lock( hQueue );
1251
1252     if (queue)
1253 {
1254         hTask = queue->teb->htask16;
1255         QUEUE_Unlock( queue );
1256 }
1257
1258     return hTask;
1259 }
1260
1261
1262
1263 /***********************************************************************
1264  *           QUEUE_IncPaintCount
1265  */
1266 void QUEUE_IncPaintCount( HQUEUE16 hQueue )
1267 {
1268     MESSAGEQUEUE *queue;
1269
1270     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1271     queue->wPaintCount++;
1272     QUEUE_SetWakeBit( queue, QS_PAINT );
1273     QUEUE_Unlock( queue );
1274 }
1275
1276
1277 /***********************************************************************
1278  *           QUEUE_DecPaintCount
1279  */
1280 void QUEUE_DecPaintCount( HQUEUE16 hQueue )
1281 {
1282     MESSAGEQUEUE *queue;
1283
1284     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1285     queue->wPaintCount--;
1286     if (!queue->wPaintCount) queue->wakeBits &= ~QS_PAINT;
1287     QUEUE_Unlock( queue );
1288 }
1289
1290
1291 /***********************************************************************
1292  *           QUEUE_IncTimerCount
1293  */
1294 void QUEUE_IncTimerCount( HQUEUE16 hQueue )
1295 {
1296     MESSAGEQUEUE *queue;
1297
1298     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1299     queue->wTimerCount++;
1300     QUEUE_SetWakeBit( queue, QS_TIMER );
1301     QUEUE_Unlock( queue );
1302 }
1303
1304
1305 /***********************************************************************
1306  *           QUEUE_DecTimerCount
1307  */
1308 void QUEUE_DecTimerCount( HQUEUE16 hQueue )
1309 {
1310     MESSAGEQUEUE *queue;
1311
1312     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1313     queue->wTimerCount--;
1314     if (!queue->wTimerCount) queue->wakeBits &= ~QS_TIMER;
1315     QUEUE_Unlock( queue );
1316 }
1317
1318
1319 /***********************************************************************
1320  *           PostQuitMessage16   (USER.6)
1321  */
1322 void WINAPI PostQuitMessage16( INT16 exitCode )
1323 {
1324     PostQuitMessage( exitCode );
1325 }
1326
1327
1328 /***********************************************************************
1329  *           PostQuitMessage   (USER32.421)
1330  *
1331  * PostQuitMessage() posts a message to the system requesting an
1332  * application to terminate execution. As a result of this function,
1333  * the WM_QUIT message is posted to the application, and
1334  * PostQuitMessage() returns immediately.  The exitCode parameter
1335  * specifies an application-defined exit code, which appears in the
1336  * _wParam_ parameter of the WM_QUIT message posted to the application.
1337  *
1338  * CONFORMANCE
1339  *
1340  *  ECMA-234, Win32
1341  */
1342 void WINAPI PostQuitMessage( INT exitCode )
1343 {
1344     MESSAGEQUEUE *queue;
1345
1346     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return;
1347     queue->wPostQMsg = TRUE;
1348     queue->wExitCode = (WORD)exitCode;
1349     QUEUE_Unlock( queue );
1350 }
1351
1352
1353 /***********************************************************************
1354  *           GetWindowTask16   (USER.224)
1355  */
1356 HTASK16 WINAPI GetWindowTask16( HWND16 hwnd )
1357 {
1358     HTASK16 retvalue;
1359     WND *wndPtr = WIN_FindWndPtr( hwnd );
1360
1361     if (!wndPtr) return 0;
1362     retvalue = QUEUE_GetQueueTask( wndPtr->hmemTaskQ );
1363     WIN_ReleaseWndPtr(wndPtr);
1364     return retvalue;
1365 }
1366
1367 /***********************************************************************
1368  *           GetWindowThreadProcessId   (USER32.313)
1369  */
1370 DWORD WINAPI GetWindowThreadProcessId( HWND hwnd, LPDWORD process )
1371 {
1372     DWORD retvalue;
1373     MESSAGEQUEUE *queue;
1374
1375     WND *wndPtr = WIN_FindWndPtr( hwnd );
1376     if (!wndPtr) return 0;
1377
1378     queue = QUEUE_Lock( wndPtr->hmemTaskQ );
1379     WIN_ReleaseWndPtr(wndPtr);
1380
1381     if (!queue) return 0;
1382
1383     if ( process ) *process = (DWORD)queue->teb->pid;
1384     retvalue = (DWORD)queue->teb->tid;
1385
1386     QUEUE_Unlock( queue );
1387     return retvalue;
1388 }
1389
1390
1391 /***********************************************************************
1392  *           SetMessageQueue16   (USER.266)
1393  */
1394 BOOL16 WINAPI SetMessageQueue16( INT16 size )
1395 {
1396     return SetMessageQueue( size );
1397 }
1398
1399
1400 /***********************************************************************
1401  *           SetMessageQueue   (USER32.494)
1402  */
1403 BOOL WINAPI SetMessageQueue( INT size )
1404 {
1405     /* now obsolete the message queue will be expanded dynamically
1406      as necessary */
1407
1408     /* access the queue to create it if it's not existing */
1409     GetFastQueue16();
1410
1411     return TRUE;
1412 }
1413
1414 /***********************************************************************
1415  *           InitThreadInput16   (USER.409)
1416  */
1417 HQUEUE16 WINAPI InitThreadInput16( WORD unknown, WORD flags )
1418 {
1419     HQUEUE16 hQueue;
1420     MESSAGEQUEUE *queuePtr;
1421
1422     TEB *teb = NtCurrentTeb();
1423
1424     if (!teb)
1425         return 0;
1426
1427     hQueue = teb->queue;
1428
1429     if ( !hQueue )
1430     {
1431         /* Create thread message queue */
1432         if( !(hQueue = QUEUE_CreateMsgQueue( TRUE )))
1433         {
1434             WARN_(msg)("failed!\n");
1435             return FALSE;
1436         }
1437
1438         /* Link new queue into list */
1439         queuePtr = (MESSAGEQUEUE *)QUEUE_Lock( hQueue );
1440         queuePtr->teb = NtCurrentTeb();
1441
1442         HeapLock( SystemHeap );  /* FIXME: a bit overkill */
1443         SetThreadQueue16( 0, hQueue );
1444         teb->queue = hQueue;
1445
1446         queuePtr->next  = hFirstQueue;
1447         hFirstQueue = hQueue;
1448         HeapUnlock( SystemHeap );
1449
1450         QUEUE_Unlock( queuePtr );
1451     }
1452
1453     return hQueue;
1454 }
1455
1456 /***********************************************************************
1457  *           GetQueueStatus16   (USER.334)
1458  */
1459 DWORD WINAPI GetQueueStatus16( UINT16 flags )
1460 {
1461     MESSAGEQUEUE *queue;
1462     DWORD ret;
1463
1464     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1465     ret = MAKELONG( queue->changeBits, queue->wakeBits );
1466     queue->changeBits = 0;
1467     QUEUE_Unlock( queue );
1468
1469     return ret & MAKELONG( flags, flags );
1470 }
1471
1472 /***********************************************************************
1473  *           GetQueueStatus   (USER32.283)
1474  */
1475 DWORD WINAPI GetQueueStatus( UINT flags )
1476 {
1477     MESSAGEQUEUE *queue;
1478     DWORD ret;
1479
1480     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1481     ret = MAKELONG( queue->changeBits, queue->wakeBits );
1482     queue->changeBits = 0;
1483     QUEUE_Unlock( queue );
1484
1485     return ret & MAKELONG( flags, flags );
1486 }
1487
1488
1489 /***********************************************************************
1490  *           GetInputState16   (USER.335)
1491  */
1492 BOOL16 WINAPI GetInputState16(void)
1493 {
1494     return GetInputState();
1495 }
1496
1497 /***********************************************************************
1498  *           WaitForInputIdle   (USER32.577)
1499  */
1500 DWORD WINAPI WaitForInputIdle (HANDLE hProcess, DWORD dwTimeOut)
1501 {
1502     DWORD cur_time, ret;
1503     HANDLE idle_event;
1504     struct wait_input_idle_request *req = get_req_buffer();
1505
1506     req->handle = hProcess;
1507     req->timeout = dwTimeOut;
1508     if (server_call( REQ_WAIT_INPUT_IDLE )) return 0xffffffff;
1509     if ((idle_event = req->event) == -1) return 0;  /* no event to wait on */
1510
1511   cur_time = GetTickCount();
1512
1513   TRACE_(msg)("waiting for %x\n", idle_event );
1514   while ( dwTimeOut > GetTickCount() - cur_time || dwTimeOut == INFINITE ) {
1515
1516     ret = MsgWaitForMultipleObjects ( 1, &idle_event, FALSE, dwTimeOut, QS_SENDMESSAGE );
1517     if ( ret == ( WAIT_OBJECT_0 + 1 )) {
1518       MESSAGEQUEUE * queue;
1519       if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0xFFFFFFFF;
1520       QUEUE_ReceiveMessage ( queue );
1521       QUEUE_Unlock ( queue );
1522       continue;
1523     }
1524     if ( ret == WAIT_TIMEOUT || ret == 0xFFFFFFFF ) {
1525       TRACE_(msg)("timeout or error\n");
1526       return ret;
1527     }
1528     else {
1529       TRACE_(msg)("finished\n");
1530       return 0;
1531     }
1532
1533   }
1534   return WAIT_TIMEOUT;
1535 }
1536
1537 /***********************************************************************
1538  *           GetInputState   (USER32.244)
1539  */
1540 BOOL WINAPI GetInputState(void)
1541 {
1542     MESSAGEQUEUE *queue;
1543     BOOL ret;
1544
1545     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() )))
1546         return FALSE;
1547     ret = queue->wakeBits & (QS_KEY | QS_MOUSEBUTTON);
1548     QUEUE_Unlock( queue );
1549
1550     return ret;
1551 }
1552
1553 /***********************************************************************
1554  *           UserYield  (USER.332)
1555  */
1556 void WINAPI UserYield16(void)
1557 {
1558     MESSAGEQUEUE *queue;
1559
1560     /* Handle sent messages */
1561     queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() );
1562
1563     while (queue && (queue->wakeBits & QS_SENDMESSAGE))
1564         QUEUE_ReceiveMessage( queue );
1565
1566     QUEUE_Unlock( queue );
1567
1568     /* Yield */
1569     if ( THREAD_IsWin16( NtCurrentTeb() ) )
1570         OldYield16();
1571     else
1572         WIN32_OldYield16();
1573
1574     /* Handle sent messages again */
1575     queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() );
1576
1577     while (queue && (queue->wakeBits & QS_SENDMESSAGE))
1578         QUEUE_ReceiveMessage( queue );
1579
1580     QUEUE_Unlock( queue );
1581 }
1582
1583 /***********************************************************************
1584  *           GetMessagePos   (USER.119) (USER32.272)
1585  *
1586  * The GetMessagePos() function returns a long value representing a
1587  * cursor position, in screen coordinates, when the last message
1588  * retrieved by the GetMessage() function occurs. The x-coordinate is
1589  * in the low-order word of the return value, the y-coordinate is in
1590  * the high-order word. The application can use the MAKEPOINT()
1591  * macro to obtain a POINT structure from the return value.
1592  *
1593  * For the current cursor position, use GetCursorPos().
1594  *
1595  * RETURNS
1596  *
1597  * Cursor position of last message on success, zero on failure.
1598  *
1599  * CONFORMANCE
1600  *
1601  * ECMA-234, Win32
1602  *
1603  */
1604 DWORD WINAPI GetMessagePos(void)
1605 {
1606     MESSAGEQUEUE *queue;
1607     DWORD ret;
1608
1609     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1610     ret = queue->GetMessagePosVal;
1611     QUEUE_Unlock( queue );
1612
1613     return ret;
1614 }
1615
1616
1617 /***********************************************************************
1618  *           GetMessageTime   (USER.120) (USER32.273)
1619  *
1620  * GetMessageTime() returns the message time for the last message
1621  * retrieved by the function. The time is measured in milliseconds with
1622  * the same offset as GetTickCount().
1623  *
1624  * Since the tick count wraps, this is only useful for moderately short
1625  * relative time comparisons.
1626  *
1627  * RETURNS
1628  *
1629  * Time of last message on success, zero on failure.
1630  *
1631  * CONFORMANCE
1632  *
1633  * ECMA-234, Win32
1634  *
1635  */
1636 LONG WINAPI GetMessageTime(void)
1637 {
1638     MESSAGEQUEUE *queue;
1639     LONG ret;
1640
1641     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1642     ret = queue->GetMessageTimeVal;
1643     QUEUE_Unlock( queue );
1644
1645     return ret;
1646 }
1647
1648
1649 /***********************************************************************
1650  *           GetMessageExtraInfo   (USER.288) (USER32.271)
1651  */
1652 LONG WINAPI GetMessageExtraInfo(void)
1653 {
1654     MESSAGEQUEUE *queue;
1655     LONG ret;
1656
1657     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1658     ret = queue->GetMessageExtraInfoVal;
1659     QUEUE_Unlock( queue );
1660
1661     return ret;
1662 }