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 "process.h"
  24 #include "debugtools.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->hEvent)
 346                 CloseHandle( queue->hEvent );
 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->process->task, module, sizeof(module )))
 408             strcpy( module, "???" );
 409         DPRINTF( "%04x %4d %p %04x %s\n", hQueue,queue->msgCount,
 410                  queue->teb, queue->teb->process->task, 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
 447     TRACE_(msg)("(): Creating message queue...\n");
 448
 449     if (!(hQueue = GlobalAlloc16( GMEM_FIXED | GMEM_ZEROINIT,
 450                                   sizeof(MESSAGEQUEUE) )))
 451         return 0;
 452
 453     msgQueue = (MESSAGEQUEUE *) GlobalLock16( hQueue );
 454     if ( !msgQueue )
 455         return 0;
 456
 457     msgQueue->self        = hQueue;
 458     msgQueue->wakeBits    = msgQueue->changeBits = 0;
 459     msgQueue->wWinVersion = pTask ? pTask->version : 0;
 460
 461     InitializeCriticalSection( &msgQueue->cSection );
 462     MakeCriticalSectionGlobal( &msgQueue->cSection );
 463
 464     /* Create an Event object for waiting on message, used by win32 thread
 465        only */
 466     if ( !THREAD_IsWin16( NtCurrentTeb() ) )
 467     {
 468         msgQueue->hEvent = CreateEventA( NULL, FALSE, FALSE, NULL);
 469
 470         if (msgQueue->hEvent == 0)
 471         {
 472             WARN_(msg)("CreateEventA is not able to create an event object");
 473             return 0;
 474         }
 475         msgQueue->hEvent = ConvertToGlobalHandle( msgQueue->hEvent );
 476     }
 477     else
 478         msgQueue->hEvent = 0;
 479
 480     msgQueue->lockCount = 1;
 481     msgQueue->magic = QUEUE_MAGIC;
 482
 483     /* Create and initialize our per queue data */
 484     msgQueue->pQData = bCreatePerQData ? PERQDATA_CreateInstance() : NULL;
 485
 486     return hQueue;
 487 }
 488
 489
 490 /***********************************************************************
 491  *           QUEUE_FlushMessage
 492  *
 493  * Try to reply to all pending sent messages on exit.
 494  */
 495 static void QUEUE_FlushMessages( MESSAGEQUEUE *queue )
 496 {
 497     SMSG *smsg;
 498     MESSAGEQUEUE *senderQ = 0;
 499
 500     if( queue )
 501     {
 502         EnterCriticalSection( &queue->cSection );
 503
 504         /* empty the list of pending SendMessage waiting to be received */
 505         while (queue->smPending)
 506         {
 507             smsg = QUEUE_RemoveSMSG( queue, SM_PENDING_LIST, 0);
 508
 509             senderQ = (MESSAGEQUEUE*)QUEUE_Lock( smsg->hSrcQueue );
 510             if ( !senderQ )
 511                 continue;
 512
 513             /* return 0, to unblock other thread */
 514             smsg->lResult = 0;
 515             smsg->flags |= SMSG_HAVE_RESULT;
 516             QUEUE_SetWakeBit( senderQ, QS_SMRESULT);
 517
 518             QUEUE_Unlock( senderQ );
 519         }
 520
 521         QUEUE_ClearWakeBit( queue, QS_SENDMESSAGE );
 522
 523         LeaveCriticalSection( &queue->cSection );
 524     }
 525 }
 526
 527
 528 /***********************************************************************
 529  *           QUEUE_DeleteMsgQueue
 530  *
 531  * Unlinks and deletes a message queue.
 532  *
 533  * Note: We need to mask asynchronous events to make sure PostMessage works
 534  * even in the signal handler.
 535  */
 536 BOOL QUEUE_DeleteMsgQueue( HQUEUE16 hQueue )
 537 {
 538     MESSAGEQUEUE * msgQueue = (MESSAGEQUEUE*)QUEUE_Lock(hQueue);
 539     HQUEUE16 *pPrev;
 540
 541     TRACE_(msg)("(): Deleting message queue %04x\n", hQueue);
 542
 543     if (!hQueue || !msgQueue)
 544     {
 545         WARN_(msg)("invalid argument.\n");
 546         return 0;
 547     }
 548
 549     msgQueue->magic = 0;
 550
 551     if( hCursorQueue == hQueue ) hCursorQueue = 0;
 552     if( hActiveQueue == hQueue ) hActiveQueue = 0;
 553
 554     /* flush sent messages */
 555     QUEUE_FlushMessages( msgQueue );
 556
 557     HeapLock( SystemHeap );  /* FIXME: a bit overkill */
 558
 559     /* Release per queue data if present */
 560     if ( msgQueue->pQData )
 561     {
 562         PERQDATA_Release( msgQueue->pQData );
 563         msgQueue->pQData = 0;
 564     }
 565
 566     /* remove the message queue from the global link list */
 567     pPrev = &hFirstQueue;
 568     while (*pPrev && (*pPrev != hQueue))
 569     {
 570         MESSAGEQUEUE *msgQ = (MESSAGEQUEUE*)GlobalLock16(*pPrev);
 571
 572         /* sanity check */
 573         if ( !msgQ || (msgQ->magic != QUEUE_MAGIC) )
 574         {
 575             /* HQUEUE link list is corrupted, try to exit gracefully */
 576             WARN_(msg)("HQUEUE link list corrupted!\n");
 577             pPrev = 0;
 578             break;
 579         }
 580         pPrev = &msgQ->next;
 581     }
 582     if (pPrev && *pPrev) *pPrev = msgQueue->next;
 583     msgQueue->self = 0;
 584
 585     HeapUnlock( SystemHeap );
 586
 587     /* free up resource used by MESSAGEQUEUE strcture */
 588     msgQueue->lockCount--;
 589     QUEUE_Unlock( msgQueue );
 590
 591     return 1;
 592 }
 593
 594
 595 /***********************************************************************
 596  *           QUEUE_CreateSysMsgQueue
 597  *
 598  * Create the system message queue, and set the double-click speed.
 599  * Must be called only once.
 600  */
 601 BOOL QUEUE_CreateSysMsgQueue( int size )
 602 {
 603     /* Note: We dont need perQ data for the system message queue */
 604     if (!(hmemSysMsgQueue = QUEUE_CreateMsgQueue( FALSE )))
 605         return FALSE;
 606
 607     sysMsgQueue = (MESSAGEQUEUE *) GlobalLock16( hmemSysMsgQueue );
 608     return TRUE;
 609 }
 610
 611
 612 /***********************************************************************
 613  *           QUEUE_GetSysQueue
 614  */
 615 MESSAGEQUEUE *QUEUE_GetSysQueue(void)
 616 {
 617     return sysMsgQueue;
 618 }
 619
 620
 621 /***********************************************************************
 622  *           QUEUE_SetWakeBit
 623  *
 624  * See "Windows Internals", p.449
 625  */
 626 void QUEUE_SetWakeBit( MESSAGEQUEUE *queue, WORD bit )
 627 {
 628     TRACE_(msg)("queue = %04x (wm=%04x), bit = %04x\n",
 629                         queue->self, queue->wakeMask, bit );
 630
 631     if (bit & QS_MOUSE) pMouseQueue = queue;
 632     if (bit & QS_KEY) pKbdQueue = queue;
 633     queue->changeBits |= bit;
 634     queue->wakeBits   |= bit;
 635     if (queue->wakeMask & bit)
 636     {
 637         queue->wakeMask = 0;
 638
 639         /* Wake up thread waiting for message */
 640         if ( THREAD_IsWin16( queue->teb ) )
 641         {
 642             int iWndsLock = WIN_SuspendWndsLock();
 643             PostEvent16( queue->teb->process->task );
 644             WIN_RestoreWndsLock( iWndsLock );
 645         }
 646         else
 647         {
 648             SetEvent( queue->hEvent );
 649         }
 650     }
 651 }
 652
 653
 654 /***********************************************************************
 655  *           QUEUE_ClearWakeBit
 656  */
 657 void QUEUE_ClearWakeBit( MESSAGEQUEUE *queue, WORD bit )
 658 {
 659     queue->changeBits &= ~bit;
 660     queue->wakeBits   &= ~bit;
 661 }
 662
 663
 664 /***********************************************************************
 665  *           QUEUE_WaitBits
 666  *
 667  * See "Windows Internals", p.447
 668  *
 669  * return values:
 670  *    0 if exit with timeout
 671  *    1 otherwise
 672  */
 673 int QUEUE_WaitBits( WORD bits, DWORD timeout )
 674 {
 675     MESSAGEQUEUE *queue;
 676     DWORD curTime = 0;
 677     HQUEUE16 hQueue;
 678     PDB * pdb;
 679
 680     TRACE_(msg)("q %04x waiting for %04x\n", GetFastQueue16(), bits);
 681
 682     if ( THREAD_IsWin16( NtCurrentTeb() ) && (timeout != INFINITE) )
 683         curTime = GetTickCount();
 684
 685     hQueue = GetFastQueue16();
 686     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return 0;
 687
 688     pdb = PROCESS_Current();
 689
 690     for (;;)
 691     {
 692         if (queue->changeBits & bits)
 693         {
 694             /* One of the bits is set; we can return */
 695             queue->wakeMask = 0;
 696             QUEUE_Unlock( queue );
 697             return 1;
 698         }
 699         if (queue->wakeBits & QS_SENDMESSAGE)
 700         {
 701             /* Process the sent message immediately */
 702
 703             queue->wakeMask = 0;
 704             QUEUE_ReceiveMessage( queue );
 705             continue;                           /* nested sm crux */
 706         }
 707
 708         queue->wakeMask = bits | QS_SENDMESSAGE;
 709         if(queue->changeBits & bits)
 710         {
 711             continue;
 712         }
 713
 714         TRACE_(msg)("%04x) wakeMask is %04x, waiting\n", queue->self, queue->wakeMask);
 715
 716         if ( !THREAD_IsWin16( NtCurrentTeb() ) )
 717         {
 718             BOOL                bHasWin16Lock;
 719             DWORD               dwlc;
 720
 721             if ( (bHasWin16Lock = _ConfirmWin16Lock()) )
 722             {
 723                 TRACE_(msg)("bHasWin16Lock=TRUE\n");
 724                 ReleaseThunkLock( &dwlc );
 725             }
 726
 727
 728             if ( pdb->main_queue == INVALID_HANDLE_VALUE16 )
 729             {
 730                 pdb->main_queue = hQueue;
 731             }
 732             if ( pdb->main_queue == hQueue )
 733             {
 734                 SetEvent ( pdb->idle_event );
 735             }
 736
 737             WaitForSingleObject( queue->hEvent, timeout );
 738
 739             if ( pdb->main_queue == hQueue )
 740             {
 741                 ResetEvent ( pdb->idle_event );
 742             }
 743
 744             if ( bHasWin16Lock )
 745             {
 746                 RestoreThunkLock( dwlc );
 747             }
 748         }
 749         else
 750         {
 751             SetEvent ( pdb->idle_event );
 752
 753             if ( timeout == INFINITE )
 754                 WaitEvent16( 0 );  /* win 16 thread, use WaitEvent */
 755             else
 756             {
 757                 /* check for timeout, then give control to other tasks */
 758                 if (GetTickCount() - curTime > timeout)
 759                 {
 760
 761                     QUEUE_Unlock( queue );
 762                     return 0;   /* exit with timeout */
 763                 }
 764                 Yield16();
 765             }
 766         }
 767     }
 768 }
 769
 770
 771 /***********************************************************************
 772  *           QUEUE_AddSMSG
 773  *
 774  * This routine is called when a SMSG need to be added to one of the three
 775  * SM list.  (SM_PROCESSING_LIST, SM_PENDING_LIST, SM_WAITING_LIST)
 776  */
 777 BOOL QUEUE_AddSMSG( MESSAGEQUEUE *queue, int list, SMSG *smsg )
 778 {
 779     TRACE_(sendmsg)("queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
 780           smsg, SPY_GetMsgName(smsg->msg));
 781
 782     switch (list)
 783     {
 784         case SM_PROCESSING_LIST:
 785             /* don't need to be thread safe, only accessed by the
 786              thread associated with the sender queue */
 787             smsg->nextProcessing = queue->smProcessing;
 788             queue->smProcessing = smsg;
 789             break;
 790
 791         case SM_WAITING_LIST:
 792             /* don't need to be thread safe, only accessed by the
 793              thread associated with the receiver queue */
 794             smsg->nextWaiting = queue->smWaiting;
 795             queue->smWaiting = smsg;
 796             break;
 797
 798         case SM_PENDING_LIST:
 799         {
 800             /* make it thread safe, could be accessed by the sender and
 801              receiver thread */
 802             SMSG **prev;
 803
 804             EnterCriticalSection( &queue->cSection );
 805             smsg->nextPending = NULL;
 806             prev = &queue->smPending;
 807             while ( *prev )
 808                 prev = &(*prev)->nextPending;
 809             *prev = smsg;
 810             LeaveCriticalSection( &queue->cSection );
 811
 812             QUEUE_SetWakeBit( queue, QS_SENDMESSAGE );
 813             break;
 814         }
 815
 816         default:
 817             WARN_(sendmsg)("Invalid list: %d", list);
 818             break;
 819     }
 820
 821     return TRUE;
 822 }
 823
 824
 825 /***********************************************************************
 826  *           QUEUE_RemoveSMSG
 827  *
 828  * This routine is called when a SMSG need to be remove from one of the three
 829  * SM list.  (SM_PROCESSING_LIST, SM_PENDING_LIST, SM_WAITING_LIST)
 830  * If smsg == 0, remove the first smsg from the specified list
 831  */
 832 SMSG *QUEUE_RemoveSMSG( MESSAGEQUEUE *queue, int list, SMSG *smsg )
 833 {
 834
 835     switch (list)
 836     {
 837         case SM_PROCESSING_LIST:
 838             /* don't need to be thread safe, only accessed by the
 839              thread associated with the sender queue */
 840
 841             /* if smsg is equal to null, it means the first in the list */
 842             if (!smsg)
 843                 smsg = queue->smProcessing;
 844
 845             TRACE_(sendmsg)("queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
 846                   smsg, SPY_GetMsgName(smsg->msg));
 847             /* In fact SM_PROCESSING_LIST is a stack, and smsg
 848              should be always at the top of the list */
 849             if ( (smsg != queue->smProcessing) || !queue->smProcessing )
 850         {
 851                 ERR_(sendmsg)("smsg not at the top of Processing list, smsg=0x%p queue=0x%p", smsg, queue);
 852                 return 0;
 853             }
 854             else
 855             {
 856                 queue->smProcessing = smsg->nextProcessing;
 857                 smsg->nextProcessing = 0;
 858         }
 859             return smsg;
 860
 861         case SM_WAITING_LIST:
 862             /* don't need to be thread safe, only accessed by the
 863              thread associated with the receiver queue */
 864
 865             /* if smsg is equal to null, it means the first in the list */
 866             if (!smsg)
 867                 smsg = queue->smWaiting;
 868
 869             TRACE_(sendmsg)("queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
 870                   smsg, SPY_GetMsgName(smsg->msg));
 871             /* In fact SM_WAITING_LIST is a stack, and smsg
 872              should be always at the top of the list */
 873             if ( (smsg != queue->smWaiting) || !queue->smWaiting )
 874             {
 875                 ERR_(sendmsg)("smsg not at the top of Waiting list, smsg=0x%p queue=0x%p", smsg, queue);
 876                 return 0;
 877             }
 878             else
 879             {
 880                 queue->smWaiting = smsg->nextWaiting;
 881                 smsg->nextWaiting = 0;
 882     }
 883             return smsg;
 884
 885         case SM_PENDING_LIST:
 886             /* make it thread safe, could be accessed by the sender and
 887              receiver thread */
 888             EnterCriticalSection( &queue->cSection );
 889
 890             if (!smsg || !queue->smPending)
 891                 smsg = queue->smPending;
 892             else
 893             {
 894                 ERR_(sendmsg)("should always remove the top one in Pending list, smsg=0x%p queue=0x%p", smsg, queue);
 895                                 LeaveCriticalSection( &queue->cSection );
 896                 return 0;
 897             }
 898
 899             TRACE_(sendmsg)("queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
 900                   smsg, SPY_GetMsgName(smsg->msg));
 901
 902             queue->smPending = smsg->nextPending;
 903             smsg->nextPending = 0;
 904
 905             /* if no more SMSG in Pending list, clear QS_SENDMESSAGE flag */
 906             if (!queue->smPending)
 907                 QUEUE_ClearWakeBit( queue, QS_SENDMESSAGE );
 908
 909             LeaveCriticalSection( &queue->cSection );
 910             return smsg;
 911
 912         default:
 913             WARN_(sendmsg)("Invalid list: %d", list);
 914             break;
 915     }
 916
 917     return 0;
 918 }
 919
 920
 921 /***********************************************************************
 922  *           QUEUE_ReceiveMessage
 923  *
 924  * This routine is called when a sent message is waiting for the queue.
 925  */
 926 void QUEUE_ReceiveMessage( MESSAGEQUEUE *queue )
 927 {
 928     LRESULT       result = 0;
 929     SMSG          *smsg;
 930     MESSAGEQUEUE  *senderQ;
 931
 932     TRACE_(sendmsg)("queue %04x\n", queue->self );
 933
 934     if ( !(queue->wakeBits & QS_SENDMESSAGE) && queue->smPending )
 935     {
 936         TRACE_(sendmsg)("\trcm: nothing to do\n");
 937         return;
 938     }
 939
 940     /* remove smsg on the top of the pending list and put it in the processing list */
 941     smsg = QUEUE_RemoveSMSG(queue, SM_PENDING_LIST, 0);
 942     QUEUE_AddSMSG(queue, SM_WAITING_LIST, smsg);
 943
 944     TRACE_(sendmsg)("RM: %s [%04x] (%04x -> %04x)\n",
 945             SPY_GetMsgName(smsg->msg), smsg->msg, smsg->hSrcQueue, smsg->hDstQueue );
 946
 947     if (IsWindow( smsg->hWnd ))
 948     {
 949         WND *wndPtr = WIN_FindWndPtr( smsg->hWnd );
 950         DWORD extraInfo = queue->GetMessageExtraInfoVal; /* save ExtraInfo */
 951
 952         /* use sender queue extra info value while calling the window proc */
 953         senderQ = (MESSAGEQUEUE*)QUEUE_Lock( smsg->hSrcQueue );
 954         if (senderQ)
 955   {
 956             queue->GetMessageExtraInfoVal = senderQ->GetMessageExtraInfoVal;
 957             QUEUE_Unlock( senderQ );
 958         }
 959
 960         /* call the right version of CallWindowProcXX */
 961         if (smsg->flags & SMSG_WIN32)
 962         {
 963             TRACE_(sendmsg)("\trcm: msg is Win32\n" );
 964             if (smsg->flags & SMSG_UNICODE)
 965                 result = CallWindowProcW( wndPtr->winproc,
 966                                             smsg->hWnd, smsg->msg,
 967                                             smsg->wParam, smsg->lParam );
 968             else
 969                 result = CallWindowProcA( wndPtr->winproc,
 970                                             smsg->hWnd, smsg->msg,
 971                                             smsg->wParam, smsg->lParam );
 972         }
 973         else  /* Win16 message */
 974             result = CallWindowProc16( (WNDPROC16)wndPtr->winproc,
 975                                        (HWND16) smsg->hWnd,
 976                                        (UINT16) smsg->msg,
 977                                        LOWORD (smsg->wParam),
 978                                        smsg->lParam );
 979
 980         queue->GetMessageExtraInfoVal = extraInfo;  /* Restore extra info */
 981         WIN_ReleaseWndPtr(wndPtr);
 982         TRACE_(sendmsg)("result =  %08x\n", (unsigned)result );
 983     }
 984     else WARN_(sendmsg)("\trcm: bad hWnd\n");
 985
 986
 987         /* set SMSG_SENDING_REPLY flag to tell ReplyMessage16, it's not
 988          an early reply */
 989         smsg->flags |= SMSG_SENDING_REPLY;
 990         ReplyMessage( result );
 991
 992     TRACE_(sendmsg)("done! \n" );
 993 }
 994
 995
 996
 997 /***********************************************************************
 998  *           QUEUE_AddMsg
 999  *
1000  * Add a message to the queue. Return FALSE if queue is full.
1001  */
1002 BOOL QUEUE_AddMsg( HQUEUE16 hQueue, int type, MSG *msg, DWORD extraInfo )
1003 {
1004     MESSAGEQUEUE *msgQueue;
1005     QMSG         *qmsg;
1006
1007
1008     if (!(msgQueue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return FALSE;
1009
1010     /* allocate new message in global heap for now */
1011     if (!(qmsg = (QMSG *) HeapAlloc( SystemHeap, 0, sizeof(QMSG) ) ))
1012     {
1013         QUEUE_Unlock( msgQueue );
1014         return 0;
1015     }
1016
1017     EnterCriticalSection( &msgQueue->cSection );
1018
1019       /* Store message */
1020     qmsg->type = type;
1021     qmsg->msg = *msg;
1022     qmsg->extraInfo = extraInfo;
1023
1024     /* insert the message in the link list */
1025     qmsg->nextMsg = 0;
1026     qmsg->prevMsg = msgQueue->lastMsg;
1027
1028     if (msgQueue->lastMsg)
1029         msgQueue->lastMsg->nextMsg = qmsg;
1030
1031     /* update first and last anchor in message queue */
1032     msgQueue->lastMsg = qmsg;
1033     if (!msgQueue->firstMsg)
1034         msgQueue->firstMsg = qmsg;
1035
1036     msgQueue->msgCount++;
1037
1038     LeaveCriticalSection( &msgQueue->cSection );
1039
1040     QUEUE_SetWakeBit( msgQueue, QS_POSTMESSAGE );
1041     QUEUE_Unlock( msgQueue );
1042
1043     return TRUE;
1044 }
1045
1046
1047
1048 /***********************************************************************
1049  *           QUEUE_FindMsg
1050  *
1051  * Find a message matching the given parameters. Return -1 if none available.
1052  */
1053 QMSG* QUEUE_FindMsg( MESSAGEQUEUE * msgQueue, HWND hwnd, int first, int last )
1054 {
1055     QMSG* qmsg;
1056
1057     EnterCriticalSection( &msgQueue->cSection );
1058
1059     if (!msgQueue->msgCount)
1060         qmsg = 0;
1061     else if (!hwnd && !first && !last)
1062         qmsg = msgQueue->firstMsg;
1063     else
1064     {
1065         /* look in linked list for message matching first and last criteria */
1066         for (qmsg = msgQueue->firstMsg; qmsg; qmsg = qmsg->nextMsg)
1067     {
1068             MSG *msg = &(qmsg->msg);
1069
1070         if (!hwnd || (msg->hwnd == hwnd))
1071         {
1072                 if (!first && !last)
1073                     break;   /* found it */
1074
1075                 if ((msg->message >= first) && (!last || (msg->message <= last)))
1076                     break;   /* found it */
1077             }
1078         }
1079     }
1080
1081     LeaveCriticalSection( &msgQueue->cSection );
1082
1083     return qmsg;
1084 }
1085
1086
1087
1088 /***********************************************************************
1089  *           QUEUE_RemoveMsg
1090  *
1091  * Remove a message from the queue (pos must be a valid position).
1092  */
1093 void QUEUE_RemoveMsg( MESSAGEQUEUE * msgQueue, QMSG *qmsg )
1094 {
1095     EnterCriticalSection( &msgQueue->cSection );
1096
1097     /* set the linked list */
1098     if (qmsg->prevMsg)
1099         qmsg->prevMsg->nextMsg = qmsg->nextMsg;
1100
1101     if (qmsg->nextMsg)
1102         qmsg->nextMsg->prevMsg = qmsg->prevMsg;
1103
1104     if (msgQueue->firstMsg == qmsg)
1105         msgQueue->firstMsg = qmsg->nextMsg;
1106
1107     if (msgQueue->lastMsg == qmsg)
1108         msgQueue->lastMsg = qmsg->prevMsg;
1109
1110     /* deallocate the memory for the message */
1111     HeapFree( SystemHeap, 0, qmsg );
1112
1113     msgQueue->msgCount--;
1114     if (!msgQueue->msgCount) msgQueue->wakeBits &= ~QS_POSTMESSAGE;
1115
1116     LeaveCriticalSection( &msgQueue->cSection );
1117 }
1118
1119
1120 /***********************************************************************
1121  *           QUEUE_WakeSomeone
1122  *
1123  * Wake a queue upon reception of a hardware event.
1124  */
1125 static void QUEUE_WakeSomeone( UINT message )
1126 {
1127     WND*          wndPtr = NULL;
1128     WORD          wakeBit;
1129     HWND hwnd;
1130     HQUEUE16     hQueue = 0;
1131     MESSAGEQUEUE *queue = NULL;
1132
1133     if (hCursorQueue)
1134         hQueue = hCursorQueue;
1135
1136     if( (message >= WM_KEYFIRST) && (message <= WM_KEYLAST) )
1137     {
1138        wakeBit = QS_KEY;
1139        if( hActiveQueue )
1140            hQueue = hActiveQueue;
1141     }
1142     else
1143     {
1144        wakeBit = (message == WM_MOUSEMOVE) ? QS_MOUSEMOVE : QS_MOUSEBUTTON;
1145        if( (hwnd = GetCapture()) )
1146          if( (wndPtr = WIN_FindWndPtr( hwnd )) )
1147            {
1148                hQueue = wndPtr->hmemTaskQ;
1149                WIN_ReleaseWndPtr(wndPtr);
1150            }
1151     }
1152
1153     if( (hwnd = GetSysModalWindow16()) )
1154     {
1155       if( (wndPtr = WIN_FindWndPtr( hwnd )) )
1156         {
1157             hQueue = wndPtr->hmemTaskQ;
1158             WIN_ReleaseWndPtr(wndPtr);
1159         }
1160     }
1161
1162     if (hQueue)
1163         queue = QUEUE_Lock( hQueue );
1164
1165     if( !queue )
1166     {
1167         queue = QUEUE_Lock( hFirstQueue );
1168       while( queue )
1169       {
1170         if (queue->wakeMask & wakeBit) break;
1171
1172             QUEUE_Unlock(queue);
1173             queue = QUEUE_Lock( queue->next );
1174       }
1175       if( !queue )
1176       {
1177         WARN_(msg)("couldn't find queue\n");
1178         return;
1179       }
1180     }
1181
1182     QUEUE_SetWakeBit( queue, wakeBit );
1183
1184     QUEUE_Unlock( queue );
1185 }
1186
1187
1188 /***********************************************************************
1189  *           hardware_event
1190  *
1191  * Add an event to the system message queue.
1192  * Note: the position is relative to the desktop window.
1193  */
1194 void hardware_event( UINT message, WPARAM wParam, LPARAM lParam,
1195                      int xPos, int yPos, DWORD time, DWORD extraInfo )
1196 {
1197     MSG *msg;
1198     QMSG  *qmsg;
1199     int  mergeMsg = 0;
1200
1201     if (!sysMsgQueue) return;
1202
1203     EnterCriticalSection( &sysMsgQueue->cSection );
1204
1205     /* Merge with previous event if possible */
1206     qmsg = sysMsgQueue->lastMsg;
1207
1208     if ((message == WM_MOUSEMOVE) && sysMsgQueue->lastMsg)
1209     {
1210         msg = &(sysMsgQueue->lastMsg->msg);
1211
1212         if ((msg->message == message) && (msg->wParam == wParam))
1213         {
1214             /* Merge events */
1215             qmsg = sysMsgQueue->lastMsg;
1216             mergeMsg = 1;
1217     }
1218     }
1219
1220     if (!mergeMsg)
1221     {
1222         /* Should I limit the number of message in
1223           the system message queue??? */
1224
1225         /* Don't merge allocate a new msg in the global heap */
1226
1227         if (!(qmsg = (QMSG *) HeapAlloc( SystemHeap, 0, sizeof(QMSG) ) ))
1228         {
1229             LeaveCriticalSection( &sysMsgQueue->cSection );
1230             return;
1231         }
1232
1233         /* put message at the end of the linked list */
1234         qmsg->nextMsg = 0;
1235         qmsg->prevMsg = sysMsgQueue->lastMsg;
1236
1237         if (sysMsgQueue->lastMsg)
1238             sysMsgQueue->lastMsg->nextMsg = qmsg;
1239
1240         /* set last and first anchor index in system message queue */
1241         sysMsgQueue->lastMsg = qmsg;
1242         if (!sysMsgQueue->firstMsg)
1243             sysMsgQueue->firstMsg = qmsg;
1244
1245         sysMsgQueue->msgCount++;
1246     }
1247
1248       /* Store message */
1249     msg = &(qmsg->msg);
1250     msg->hwnd    = 0;
1251     msg->message = message;
1252     msg->wParam  = wParam;
1253     msg->lParam  = lParam;
1254     msg->time    = time;
1255     msg->pt.x    = xPos;
1256     msg->pt.y    = yPos;
1257     qmsg->extraInfo = extraInfo;
1258     qmsg->type      = QMSG_HARDWARE;
1259
1260     LeaveCriticalSection( &sysMsgQueue->cSection );
1261
1262     QUEUE_WakeSomeone( message );
1263 }
1264
1265
1266 /***********************************************************************
1267  *           QUEUE_GetQueueTask
1268  */
1269 HTASK16 QUEUE_GetQueueTask( HQUEUE16 hQueue )
1270 {
1271     HTASK16 hTask = 0;
1272
1273     MESSAGEQUEUE *queue = QUEUE_Lock( hQueue );
1274
1275     if (queue)
1276 {
1277         hTask = queue->teb->process->task;
1278         QUEUE_Unlock( queue );
1279 }
1280
1281     return hTask;
1282 }
1283
1284
1285
1286 /***********************************************************************
1287  *           QUEUE_IncPaintCount
1288  */
1289 void QUEUE_IncPaintCount( HQUEUE16 hQueue )
1290 {
1291     MESSAGEQUEUE *queue;
1292
1293     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1294     queue->wPaintCount++;
1295     QUEUE_SetWakeBit( queue, QS_PAINT );
1296     QUEUE_Unlock( queue );
1297 }
1298
1299
1300 /***********************************************************************
1301  *           QUEUE_DecPaintCount
1302  */
1303 void QUEUE_DecPaintCount( HQUEUE16 hQueue )
1304 {
1305     MESSAGEQUEUE *queue;
1306
1307     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1308     queue->wPaintCount--;
1309     if (!queue->wPaintCount) queue->wakeBits &= ~QS_PAINT;
1310     QUEUE_Unlock( queue );
1311 }
1312
1313
1314 /***********************************************************************
1315  *           QUEUE_IncTimerCount
1316  */
1317 void QUEUE_IncTimerCount( HQUEUE16 hQueue )
1318 {
1319     MESSAGEQUEUE *queue;
1320
1321     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1322     queue->wTimerCount++;
1323     QUEUE_SetWakeBit( queue, QS_TIMER );
1324     QUEUE_Unlock( queue );
1325 }
1326
1327
1328 /***********************************************************************
1329  *           QUEUE_DecTimerCount
1330  */
1331 void QUEUE_DecTimerCount( HQUEUE16 hQueue )
1332 {
1333     MESSAGEQUEUE *queue;
1334
1335     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1336     queue->wTimerCount--;
1337     if (!queue->wTimerCount) queue->wakeBits &= ~QS_TIMER;
1338     QUEUE_Unlock( queue );
1339 }
1340
1341
1342 /***********************************************************************
1343  *           PostQuitMessage16   (USER.6)
1344  */
1345 void WINAPI PostQuitMessage16( INT16 exitCode )
1346 {
1347     PostQuitMessage( exitCode );
1348 }
1349
1350
1351 /***********************************************************************
1352  *           PostQuitMessage32   (USER32.421)
1353  *
1354  * PostQuitMessage() posts a message to the system requesting an
1355  * application to terminate execution. As a result of this function,
1356  * the WM_QUIT message is posted to the application, and
1357  * PostQuitMessage() returns immediately.  The exitCode parameter
1358  * specifies an application-defined exit code, which appears in the
1359  * _wParam_ parameter of the WM_QUIT message posted to the application.
1360  *
1361  * CONFORMANCE
1362  *
1363  *  ECMA-234, Win32
1364  */
1365 void WINAPI PostQuitMessage( INT exitCode )
1366 {
1367     MESSAGEQUEUE *queue;
1368
1369     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return;
1370     queue->wPostQMsg = TRUE;
1371     queue->wExitCode = (WORD)exitCode;
1372     QUEUE_Unlock( queue );
1373 }
1374
1375
1376 /***********************************************************************
1377  *           GetWindowTask16   (USER.224)
1378  */
1379 HTASK16 WINAPI GetWindowTask16( HWND16 hwnd )
1380 {
1381     HTASK16 retvalue;
1382     WND *wndPtr = WIN_FindWndPtr( hwnd );
1383
1384     if (!wndPtr) return 0;
1385     retvalue = QUEUE_GetQueueTask( wndPtr->hmemTaskQ );
1386     WIN_ReleaseWndPtr(wndPtr);
1387     return retvalue;
1388 }
1389
1390 /***********************************************************************
1391  *           GetWindowThreadProcessId   (USER32.313)
1392  */
1393 DWORD WINAPI GetWindowThreadProcessId( HWND hwnd, LPDWORD process )
1394 {
1395     DWORD retvalue;
1396     MESSAGEQUEUE *queue;
1397
1398     WND *wndPtr = WIN_FindWndPtr( hwnd );
1399     if (!wndPtr) return 0;
1400
1401     queue = QUEUE_Lock( wndPtr->hmemTaskQ );
1402     WIN_ReleaseWndPtr(wndPtr);
1403
1404     if (!queue) return 0;
1405
1406     if ( process ) *process = (DWORD)queue->teb->process->server_pid;
1407     retvalue = (DWORD)queue->teb->tid;
1408
1409     QUEUE_Unlock( queue );
1410     return retvalue;
1411 }
1412
1413
1414 /***********************************************************************
1415  *           SetMessageQueue16   (USER.266)
1416  */
1417 BOOL16 WINAPI SetMessageQueue16( INT16 size )
1418 {
1419     return SetMessageQueue( size );
1420 }
1421
1422
1423 /***********************************************************************
1424  *           SetMessageQueue   (USER32.494)
1425  */
1426 BOOL WINAPI SetMessageQueue( INT size )
1427 {
1428     /* now obsolete the message queue will be expanded dynamically
1429      as necessary */
1430
1431     /* access the queue to create it if it's not existing */
1432     GetFastQueue16();
1433
1434     return TRUE;
1435 }
1436
1437 /***********************************************************************
1438  *           InitThreadInput16   (USER.409)
1439  */
1440 HQUEUE16 WINAPI InitThreadInput16( WORD unknown, WORD flags )
1441 {
1442     HQUEUE16 hQueue;
1443     MESSAGEQUEUE *queuePtr;
1444
1445     TEB *teb = NtCurrentTeb();
1446
1447     if (!teb)
1448         return 0;
1449
1450     hQueue = teb->queue;
1451
1452     if ( !hQueue )
1453     {
1454         /* Create thread message queue */
1455         if( !(hQueue = QUEUE_CreateMsgQueue( TRUE )))
1456         {
1457             WARN_(msg)("failed!\n");
1458             return FALSE;
1459         }
1460
1461         /* Link new queue into list */
1462         queuePtr = (MESSAGEQUEUE *)QUEUE_Lock( hQueue );
1463         queuePtr->teb = NtCurrentTeb();
1464
1465         HeapLock( SystemHeap );  /* FIXME: a bit overkill */
1466         SetThreadQueue16( 0, hQueue );
1467         teb->queue = hQueue;
1468
1469         queuePtr->next  = hFirstQueue;
1470         hFirstQueue = hQueue;
1471         HeapUnlock( SystemHeap );
1472
1473         QUEUE_Unlock( queuePtr );
1474     }
1475
1476     return hQueue;
1477 }
1478
1479 /***********************************************************************
1480  *           GetQueueStatus16   (USER.334)
1481  */
1482 DWORD WINAPI GetQueueStatus16( UINT16 flags )
1483 {
1484     MESSAGEQUEUE *queue;
1485     DWORD ret;
1486
1487     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1488     ret = MAKELONG( queue->changeBits, queue->wakeBits );
1489     queue->changeBits = 0;
1490     QUEUE_Unlock( queue );
1491
1492     return ret & MAKELONG( flags, flags );
1493 }
1494
1495 /***********************************************************************
1496  *           GetQueueStatus32   (USER32.283)
1497  */
1498 DWORD WINAPI GetQueueStatus( UINT flags )
1499 {
1500     MESSAGEQUEUE *queue;
1501     DWORD ret;
1502
1503     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1504     ret = MAKELONG( queue->changeBits, queue->wakeBits );
1505     queue->changeBits = 0;
1506     QUEUE_Unlock( queue );
1507
1508     return ret & MAKELONG( flags, flags );
1509 }
1510
1511
1512 /***********************************************************************
1513  *           GetInputState16   (USER.335)
1514  */
1515 BOOL16 WINAPI GetInputState16(void)
1516 {
1517     return GetInputState();
1518 }
1519
1520 /***********************************************************************
1521  *           WaitForInputIdle   (USER32.577)
1522  */
1523 DWORD WINAPI WaitForInputIdle (HANDLE hProcess, DWORD dwTimeOut)
1524 {
1525   PDB * pdb;
1526   DWORD cur_time, ret, pid = MapProcessHandle ( hProcess );
1527
1528   /* Check whether the calling process is a command line application */
1529   if (!THREAD_IsWin16(NtCurrentTeb() ) &&
1530       (PROCESS_Current()->flags & PDB32_CONSOLE_PROC))
1531   {
1532     TRACE_(msg)("not a win32 GUI application!\n" );
1533     return 0;
1534   }
1535
1536   pdb = PROCESS_IdToPDB( pid );
1537
1538   /* check whether we are waiting for a win32 process or the win16 subsystem */
1539   if ( pdb->flags & PDB32_WIN16_PROC ) {
1540     if ( THREAD_IsWin16(NtCurrentTeb()) ) return 0;
1541   }
1542     else { /* target is win32 */
1543     if ( pdb->flags & PDB32_CONSOLE_PROC ) return 0;
1544     if ( GetFastQueue16() == pdb->main_queue ) return 0;
1545   }
1546
1547   cur_time = GetTickCount();
1548
1549   TRACE_(msg)("waiting for %x\n", pdb->idle_event );
1550   while ( dwTimeOut > GetTickCount() - cur_time || dwTimeOut == INFINITE ) {
1551
1552     ret = MsgWaitForMultipleObjects ( 1, &pdb->idle_event, FALSE, dwTimeOut, QS_SENDMESSAGE );
1553     if ( ret == ( WAIT_OBJECT_0 + 1 )) {
1554       MESSAGEQUEUE * queue;
1555       if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0xFFFFFFFF;
1556       QUEUE_ReceiveMessage ( queue );
1557       QUEUE_Unlock ( queue );
1558       continue;
1559     }
1560     if ( ret == WAIT_TIMEOUT || ret == 0xFFFFFFFF ) {
1561       TRACE_(msg)("timeout or error\n");
1562       return ret;
1563     }
1564     else {
1565       TRACE_(msg)("finished\n");
1566       return 0;
1567     }
1568
1569   }
1570   return WAIT_TIMEOUT;
1571 }
1572
1573 /***********************************************************************
1574  *           GetInputState32   (USER32.244)
1575  */
1576 BOOL WINAPI GetInputState(void)
1577 {
1578     MESSAGEQUEUE *queue;
1579     BOOL ret;
1580
1581     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() )))
1582         return FALSE;
1583     ret = queue->wakeBits & (QS_KEY | QS_MOUSEBUTTON);
1584     QUEUE_Unlock( queue );
1585
1586     return ret;
1587 }
1588
1589 /***********************************************************************
1590  *           UserYield  (USER.332)
1591  */
1592 void WINAPI UserYield16(void)
1593 {
1594     MESSAGEQUEUE *queue;
1595
1596     /* Handle sent messages */
1597     queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() );
1598
1599     while (queue && (queue->wakeBits & QS_SENDMESSAGE))
1600         QUEUE_ReceiveMessage( queue );
1601
1602     QUEUE_Unlock( queue );
1603
1604     /* Yield */
1605     if ( THREAD_IsWin16( NtCurrentTeb() ) )
1606         OldYield16();
1607     else
1608         WIN32_OldYield16();
1609
1610     /* Handle sent messages again */
1611     queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() );
1612
1613     while (queue && (queue->wakeBits & QS_SENDMESSAGE))
1614         QUEUE_ReceiveMessage( queue );
1615
1616     QUEUE_Unlock( queue );
1617 }
1618
1619 /***********************************************************************
1620  *           GetMessagePos   (USER.119) (USER32.272)
1621  *
1622  * The GetMessagePos() function returns a long value representing a
1623  * cursor position, in screen coordinates, when the last message
1624  * retrieved by the GetMessage() function occurs. The x-coordinate is
1625  * in the low-order word of the return value, the y-coordinate is in
1626  * the high-order word. The application can use the MAKEPOINT()
1627  * macro to obtain a POINT structure from the return value.
1628  *
1629  * For the current cursor position, use GetCursorPos().
1630  *
1631  * RETURNS
1632  *
1633  * Cursor position of last message on success, zero on failure.
1634  *
1635  * CONFORMANCE
1636  *
1637  * ECMA-234, Win32
1638  *
1639  */
1640 DWORD WINAPI GetMessagePos(void)
1641 {
1642     MESSAGEQUEUE *queue;
1643     DWORD ret;
1644
1645     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1646     ret = queue->GetMessagePosVal;
1647     QUEUE_Unlock( queue );
1648
1649     return ret;
1650 }
1651
1652
1653 /***********************************************************************
1654  *           GetMessageTime   (USER.120) (USER32.273)
1655  *
1656  * GetMessageTime() returns the message time for the last message
1657  * retrieved by the function. The time is measured in milliseconds with
1658  * the same offset as GetTickCount().
1659  *
1660  * Since the tick count wraps, this is only useful for moderately short
1661  * relative time comparisons.
1662  *
1663  * RETURNS
1664  *
1665  * Time of last message on success, zero on failure.
1666  *
1667  * CONFORMANCE
1668  *
1669  * ECMA-234, Win32
1670  *
1671  */
1672 LONG WINAPI GetMessageTime(void)
1673 {
1674     MESSAGEQUEUE *queue;
1675     LONG ret;
1676
1677     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1678     ret = queue->GetMessageTimeVal;
1679     QUEUE_Unlock( queue );
1680
1681     return ret;
1682 }
1683
1684
1685 /***********************************************************************
1686  *           GetMessageExtraInfo   (USER.288) (USER32.271)
1687  */
1688 LONG WINAPI GetMessageExtraInfo(void)
1689 {
1690     MESSAGEQUEUE *queue;
1691     LONG ret;
1692
1693     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1694     ret = queue->GetMessageExtraInfoVal;
1695     QUEUE_Unlock( queue );
1696
1697     return ret;
1698 }