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 "wine/winbase16.h"
   9 #include "wine/winuser16.h"
  10 #include "miscemu.h"
  11 #include "syslevel.h"
  12 #include "module.h"
  13 #include "queue.h"
  14 #include "task.h"
  15 #include "win.h"
  16 #include "clipboard.h"
  17 #include "hook.h"
  18 #include "heap.h"
  19 #include "thread.h"
  20 #include "process.h"
  21 #include <assert.h>
  22 #include "debugtools.h"
  23 #include "spy.h"
  24
  25 DECLARE_DEBUG_CHANNEL(msg)
  26 DECLARE_DEBUG_CHANNEL(sendmsg)
  27
  28 #define MAX_QUEUE_SIZE   120  /* Max. size of a message queue */
  29
  30 static HQUEUE16 hFirstQueue = 0;
  31 static HQUEUE16 hExitingQueue = 0;
  32 static HQUEUE16 hmemSysMsgQueue = 0;
  33 static MESSAGEQUEUE *sysMsgQueue = NULL;
  34 static PERQUEUEDATA *pQDataWin16 = NULL;  /* Global perQData for Win16 tasks */
  35
  36 static MESSAGEQUEUE *pMouseQueue = NULL;  /* Queue for last mouse message */
  37 static MESSAGEQUEUE *pKbdQueue = NULL;    /* Queue for last kbd message */
  38
  39 HQUEUE16 hCursorQueue = 0;
  40 HQUEUE16 hActiveQueue = 0;
  41
  42
  43 /***********************************************************************
  44  *           PERQDATA_CreateInstance
  45  *
  46  * Creates an instance of a reference counted PERQUEUEDATA element
  47  * for the message queue. perQData is stored globally for 16 bit tasks.
  48  *
  49  * Note: We don't implement perQdata exactly the same way Windows does.
  50  * Each perQData element is reference counted since it may be potentially
  51  * shared by multiple message Queues (via AttachThreadInput).
  52  * We only store the current values for Active, Capture and focus windows
  53  * currently.
  54  */
  55 PERQUEUEDATA * PERQDATA_CreateInstance( )
  56 {
  57     PERQUEUEDATA *pQData;
  58
  59     BOOL16 bIsWin16 = 0;
  60
  61     TRACE_(msg)("()\n");
  62
  63     /* Share a single instance of perQData for all 16 bit tasks */
  64     if ( ( bIsWin16 = THREAD_IsWin16( THREAD_Current() ) ) )
  65     {
  66         /* If previously allocated, just bump up ref count */
  67         if ( pQDataWin16 )
  68         {
  69             PERQDATA_Addref( pQDataWin16 );
  70             return pQDataWin16;
  71         }
  72     }
  73
  74     /* Allocate PERQUEUEDATA from the system heap */
  75     if (!( pQData = (PERQUEUEDATA *) HeapAlloc( SystemHeap, 0,
  76                                                     sizeof(PERQUEUEDATA) ) ))
  77         return 0;
  78
  79     /* Initialize */
  80     pQData->hWndCapture = pQData->hWndFocus = pQData->hWndActive = 0;
  81     pQData->ulRefCount = 1;
  82     pQData->nCaptureHT = HTCLIENT;
  83
  84     /* Note: We have an independent critical section for the per queue data
  85      * since this may be shared by different threads. see AttachThreadInput()
  86      */
  87     InitializeCriticalSection( &pQData->cSection );
  88
  89     /* Save perQData globally for 16 bit tasks */
  90     if ( bIsWin16 )
  91         pQDataWin16 = pQData;
  92
  93     return pQData;
  94 }
  95
  96
  97 /***********************************************************************
  98  *           PERQDATA_Addref
  99  *
 100  * Increment reference count for the PERQUEUEDATA instance
 101  * Returns reference count for debugging purposes
 102  */
 103 ULONG PERQDATA_Addref( PERQUEUEDATA *pQData )
 104 {
 105     assert(pQData != 0 );
 106     TRACE_(msg)("(): current refcount %lu ...\n", pQData->ulRefCount);
 107
 108     EnterCriticalSection( &pQData->cSection );
 109     ++pQData->ulRefCount;
 110     LeaveCriticalSection( &pQData->cSection );
 111
 112     return pQData->ulRefCount;
 113 }
 114
 115
 116 /***********************************************************************
 117  *           PERQDATA_Release
 118  *
 119  * Release a reference to a PERQUEUEDATA instance.
 120  * Destroy the instance if no more references exist
 121  * Returns reference count for debugging purposes
 122  */
 123 ULONG PERQDATA_Release( PERQUEUEDATA *pQData )
 124 {
 125     assert(pQData != 0 );
 126     TRACE_(msg)("(): current refcount %lu ...\n",
 127           (LONG)pQData->ulRefCount );
 128
 129     EnterCriticalSection( &pQData->cSection );
 130     if ( --pQData->ulRefCount == 0 )
 131     {
 132         LeaveCriticalSection( &pQData->cSection );
 133         DeleteCriticalSection( &pQData->cSection );
 134
 135         TRACE_(msg)("(): deleting PERQUEUEDATA instance ...\n" );
 136
 137         /* Deleting our global 16 bit perQData? */
 138         if ( pQData == pQDataWin16 )
 139             pQDataWin16 = 0;
 140
 141         /* Free the PERQUEUEDATA instance */
 142         HeapFree( SystemHeap, 0, pQData );
 143
 144         return 0;
 145     }
 146     LeaveCriticalSection( &pQData->cSection );
 147
 148     return pQData->ulRefCount;
 149 }
 150
 151
 152 /***********************************************************************
 153  *           PERQDATA_GetFocusWnd
 154  *
 155  * Get the focus hwnd member in a threadsafe manner
 156  */
 157 HWND PERQDATA_GetFocusWnd( PERQUEUEDATA *pQData )
 158 {
 159     HWND hWndFocus;
 160     assert(pQData != 0 );
 161
 162     EnterCriticalSection( &pQData->cSection );
 163     hWndFocus = pQData->hWndFocus;
 164     LeaveCriticalSection( &pQData->cSection );
 165
 166     return hWndFocus;
 167 }
 168
 169
 170 /***********************************************************************
 171  *           PERQDATA_SetFocusWnd
 172  *
 173  * Set the focus hwnd member in a threadsafe manner
 174  */
 175 HWND PERQDATA_SetFocusWnd( PERQUEUEDATA *pQData, HWND hWndFocus )
 176 {
 177     HWND hWndFocusPrv;
 178     assert(pQData != 0 );
 179
 180     EnterCriticalSection( &pQData->cSection );
 181     hWndFocusPrv = pQData->hWndFocus;
 182     pQData->hWndFocus = hWndFocus;
 183     LeaveCriticalSection( &pQData->cSection );
 184
 185     return hWndFocusPrv;
 186 }
 187
 188
 189 /***********************************************************************
 190  *           PERQDATA_GetActiveWnd
 191  *
 192  * Get the active hwnd member in a threadsafe manner
 193  */
 194 HWND PERQDATA_GetActiveWnd( PERQUEUEDATA *pQData )
 195 {
 196     HWND hWndActive;
 197     assert(pQData != 0 );
 198
 199     EnterCriticalSection( &pQData->cSection );
 200     hWndActive = pQData->hWndActive;
 201     LeaveCriticalSection( &pQData->cSection );
 202
 203     return hWndActive;
 204 }
 205
 206
 207 /***********************************************************************
 208  *           PERQDATA_SetActiveWnd
 209  *
 210  * Set the active focus hwnd member in a threadsafe manner
 211  */
 212 HWND PERQDATA_SetActiveWnd( PERQUEUEDATA *pQData, HWND hWndActive )
 213 {
 214     HWND hWndActivePrv;
 215     assert(pQData != 0 );
 216
 217     EnterCriticalSection( &pQData->cSection );
 218     hWndActivePrv = pQData->hWndActive;
 219     pQData->hWndActive = hWndActive;
 220     LeaveCriticalSection( &pQData->cSection );
 221
 222     return hWndActivePrv;
 223 }
 224
 225
 226 /***********************************************************************
 227  *           PERQDATA_GetCaptureWnd
 228  *
 229  * Get the capture hwnd member in a threadsafe manner
 230  */
 231 HWND PERQDATA_GetCaptureWnd( PERQUEUEDATA *pQData )
 232 {
 233     HWND hWndCapture;
 234     assert(pQData != 0 );
 235
 236     EnterCriticalSection( &pQData->cSection );
 237     hWndCapture = pQData->hWndCapture;
 238     LeaveCriticalSection( &pQData->cSection );
 239
 240     return hWndCapture;
 241 }
 242
 243
 244 /***********************************************************************
 245  *           PERQDATA_SetCaptureWnd
 246  *
 247  * Set the capture hwnd member in a threadsafe manner
 248  */
 249 HWND PERQDATA_SetCaptureWnd( PERQUEUEDATA *pQData, HWND hWndCapture )
 250 {
 251     HWND hWndCapturePrv;
 252     assert(pQData != 0 );
 253
 254     EnterCriticalSection( &pQData->cSection );
 255     hWndCapturePrv = pQData->hWndCapture;
 256     pQData->hWndCapture = hWndCapture;
 257     LeaveCriticalSection( &pQData->cSection );
 258
 259     return hWndCapturePrv;
 260 }
 261
 262
 263 /***********************************************************************
 264  *           PERQDATA_GetCaptureInfo
 265  *
 266  * Get the capture info member in a threadsafe manner
 267  */
 268 INT16 PERQDATA_GetCaptureInfo( PERQUEUEDATA *pQData )
 269 {
 270     INT16 nCaptureHT;
 271     assert(pQData != 0 );
 272
 273     EnterCriticalSection( &pQData->cSection );
 274     nCaptureHT = pQData->nCaptureHT;
 275     LeaveCriticalSection( &pQData->cSection );
 276
 277     return nCaptureHT;
 278 }
 279
 280
 281 /***********************************************************************
 282  *           PERQDATA_SetCaptureInfo
 283  *
 284  * Set the capture info member in a threadsafe manner
 285  */
 286 INT16 PERQDATA_SetCaptureInfo( PERQUEUEDATA *pQData, INT16 nCaptureHT )
 287 {
 288     INT16 nCaptureHTPrv;
 289     assert(pQData != 0 );
 290
 291     EnterCriticalSection( &pQData->cSection );
 292     nCaptureHTPrv = pQData->nCaptureHT;
 293     pQData->nCaptureHT = nCaptureHT;
 294     LeaveCriticalSection( &pQData->cSection );
 295
 296     return nCaptureHTPrv;
 297 }
 298
 299
 300 /***********************************************************************
 301  *           QUEUE_Lock
 302  *
 303  * Function for getting a 32 bit pointer on queue strcture. For thread
 304  * safeness programmers should use this function instead of GlobalLock to
 305  * retrieve a pointer on the structure. QUEUE_Unlock should also be called
 306  * when access to the queue structure is not required anymore.
 307  */
 308 MESSAGEQUEUE *QUEUE_Lock( HQUEUE16 hQueue )
 309 {
 310     MESSAGEQUEUE *queue;
 311
 312     HeapLock( SystemHeap );  /* FIXME: a bit overkill */
 313     queue = GlobalLock16( hQueue );
 314     if ( !queue || (queue->magic != QUEUE_MAGIC) )
 315     {
 316         HeapUnlock( SystemHeap );
 317         return NULL;
 318     }
 319
 320     queue->lockCount++;
 321     HeapUnlock( SystemHeap );
 322     return queue;
 323 }
 324
 325
 326 /***********************************************************************
 327  *           QUEUE_Unlock
 328  *
 329  * Use with QUEUE_Lock to get a thread safe access to message queue
 330  * structure
 331  */
 332 void QUEUE_Unlock( MESSAGEQUEUE *queue )
 333 {
 334     if (queue)
 335     {
 336         HeapLock( SystemHeap );  /* FIXME: a bit overkill */
 337
 338         if ( --queue->lockCount == 0 )
 339         {
 340             DeleteCriticalSection ( &queue->cSection );
 341             if (queue->hEvent)
 342                 CloseHandle( queue->hEvent );
 343             GlobalFree16( queue->self );
 344         }
 345
 346         HeapUnlock( SystemHeap );
 347     }
 348 }
 349
 350
 351 /***********************************************************************
 352  *           QUEUE_DumpQueue
 353  */
 354 void QUEUE_DumpQueue( HQUEUE16 hQueue )
 355 {
 356     MESSAGEQUEUE *pq;
 357
 358     if (!(pq = (MESSAGEQUEUE*) QUEUE_Lock( hQueue )) )
 359     {
 360         WARN_(msg)("%04x is not a queue handle\n", hQueue );
 361         return;
 362     }
 363
 364     DPRINTF( "next: %12.4x  Intertask SendMessage:\n"
 365              "thread: %10p  ----------------------\n"
 366              "firstMsg: %8p   smWaiting:     %10p\n"
 367              "lastMsg:  %8p   smPending:     %10p\n"
 368              "msgCount: %8.4x   smProcessing:  %10p\n"
 369              "lockCount: %7.4x\n"
 370              "wWinVer: %9.4x\n"
 371              "paints: %10.4x\n"
 372              "timers: %10.4x\n"
 373              "wakeBits: %8.4x\n"
 374              "wakeMask: %8.4x\n"
 375              "hCurHook: %8.4x\n",
 376              pq->next, pq->thdb, pq->firstMsg, pq->smWaiting, pq->lastMsg,
 377              pq->smPending, pq->msgCount, pq->smProcessing,
 378              (unsigned)pq->lockCount, pq->wWinVersion,
 379              pq->wPaintCount, pq->wTimerCount,
 380              pq->wakeBits, pq->wakeMask, pq->hCurHook);
 381
 382     QUEUE_Unlock( pq );
 383 }
 384
 385
 386 /***********************************************************************
 387  *           QUEUE_WalkQueues
 388  */
 389 void QUEUE_WalkQueues(void)
 390 {
 391     char module[10];
 392     HQUEUE16 hQueue = hFirstQueue;
 393
 394     DPRINTF( "Queue Msgs Thread   Task Module\n" );
 395     while (hQueue)
 396     {
 397         MESSAGEQUEUE *queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue );
 398         if (!queue)
 399         {
 400             WARN_(msg)("Bad queue handle %04x\n", hQueue );
 401             return;
 402         }
 403         if (!GetModuleName16( queue->thdb->process->task, module, sizeof(module )))
 404             strcpy( module, "???" );
 405         DPRINTF( "%04x %4d %p %04x %s\n", hQueue,queue->msgCount,
 406                  queue->thdb, queue->thdb->process->task, module );
 407         hQueue = queue->next;
 408         QUEUE_Unlock( queue );
 409     }
 410     DPRINTF( "\n" );
 411 }
 412
 413
 414 /***********************************************************************
 415  *           QUEUE_IsExitingQueue
 416  */
 417 BOOL QUEUE_IsExitingQueue( HQUEUE16 hQueue )
 418 {
 419     return (hExitingQueue && (hQueue == hExitingQueue));
 420 }
 421
 422
 423 /***********************************************************************
 424  *           QUEUE_SetExitingQueue
 425  */
 426 void QUEUE_SetExitingQueue( HQUEUE16 hQueue )
 427 {
 428     hExitingQueue = hQueue;
 429 }
 430
 431
 432 /***********************************************************************
 433  *           QUEUE_CreateMsgQueue
 434  *
 435  * Creates a message queue. Doesn't link it into queue list!
 436  */
 437 static HQUEUE16 QUEUE_CreateMsgQueue( BOOL16 bCreatePerQData )
 438 {
 439     HQUEUE16 hQueue;
 440     MESSAGEQUEUE * msgQueue;
 441     TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
 442
 443     TRACE_(msg)("(): Creating message queue...\n");
 444
 445     if (!(hQueue = GlobalAlloc16( GMEM_FIXED | GMEM_ZEROINIT,
 446                                   sizeof(MESSAGEQUEUE) )))
 447         return 0;
 448
 449     msgQueue = (MESSAGEQUEUE *) GlobalLock16( hQueue );
 450     if ( !msgQueue )
 451         return 0;
 452
 453     msgQueue->self        = hQueue;
 454     msgQueue->wakeBits    = msgQueue->changeBits = 0;
 455     msgQueue->wWinVersion = pTask ? pTask->version : 0;
 456
 457     InitializeCriticalSection( &msgQueue->cSection );
 458     MakeCriticalSectionGlobal( &msgQueue->cSection );
 459
 460     /* Create an Event object for waiting on message, used by win32 thread
 461        only */
 462     if ( !THREAD_IsWin16( THREAD_Current() ) )
 463     {
 464         msgQueue->hEvent = CreateEventA( NULL, FALSE, FALSE, NULL);
 465
 466         if (msgQueue->hEvent == 0)
 467         {
 468             WARN_(msg)("CreateEvent32A is not able to create an event object");
 469             return 0;
 470         }
 471         msgQueue->hEvent = ConvertToGlobalHandle( msgQueue->hEvent );
 472     }
 473     else
 474         msgQueue->hEvent = 0;
 475
 476     msgQueue->lockCount = 1;
 477     msgQueue->magic = QUEUE_MAGIC;
 478
 479     /* Create and initialize our per queue data */
 480     msgQueue->pQData = bCreatePerQData ? PERQDATA_CreateInstance() : NULL;
 481
 482     return hQueue;
 483 }
 484
 485
 486 /***********************************************************************
 487  *           QUEUE_FlushMessage
 488  *
 489  * Try to reply to all pending sent messages on exit.
 490  */
 491 void QUEUE_FlushMessages( MESSAGEQUEUE *queue )
 492 {
 493     SMSG *smsg;
 494     MESSAGEQUEUE *senderQ = 0;
 495
 496     if( queue )
 497     {
 498         EnterCriticalSection( &queue->cSection );
 499
 500         /* empty the list of pending SendMessage waiting to be received */
 501         while (queue->smPending)
 502         {
 503             smsg = QUEUE_RemoveSMSG( queue, SM_PENDING_LIST, 0);
 504
 505             senderQ = (MESSAGEQUEUE*)QUEUE_Lock( smsg->hSrcQueue );
 506             if ( !senderQ )
 507                 continue;
 508
 509             /* return 0, to unblock other thread */
 510             smsg->lResult = 0;
 511             smsg->flags |= SMSG_HAVE_RESULT;
 512             QUEUE_SetWakeBit( senderQ, QS_SMRESULT);
 513
 514             QUEUE_Unlock( senderQ );
 515         }
 516
 517         QUEUE_ClearWakeBit( queue, QS_SENDMESSAGE );
 518
 519         LeaveCriticalSection( &queue->cSection );
 520     }
 521 }
 522
 523
 524 /***********************************************************************
 525  *           QUEUE_DeleteMsgQueue
 526  *
 527  * Unlinks and deletes a message queue.
 528  *
 529  * Note: We need to mask asynchronous events to make sure PostMessage works
 530  * even in the signal handler.
 531  */
 532 BOOL QUEUE_DeleteMsgQueue( HQUEUE16 hQueue )
 533 {
 534     MESSAGEQUEUE * msgQueue = (MESSAGEQUEUE*)QUEUE_Lock(hQueue);
 535     HQUEUE16 *pPrev;
 536
 537     TRACE_(msg)("(): Deleting message queue %04x\n", hQueue);
 538
 539     if (!hQueue || !msgQueue)
 540     {
 541         WARN_(msg)("invalid argument.\n");
 542         return 0;
 543     }
 544
 545     msgQueue->magic = 0;
 546
 547     if( hCursorQueue == hQueue ) hCursorQueue = 0;
 548     if( hActiveQueue == hQueue ) hActiveQueue = 0;
 549
 550     /* flush sent messages */
 551     QUEUE_FlushMessages( msgQueue );
 552
 553     HeapLock( SystemHeap );  /* FIXME: a bit overkill */
 554
 555     /* Release per queue data if present */
 556     if ( msgQueue->pQData )
 557     {
 558         PERQDATA_Release( msgQueue->pQData );
 559         msgQueue->pQData = 0;
 560     }
 561
 562     /* remove the message queue from the global link list */
 563     pPrev = &hFirstQueue;
 564     while (*pPrev && (*pPrev != hQueue))
 565     {
 566         MESSAGEQUEUE *msgQ = (MESSAGEQUEUE*)GlobalLock16(*pPrev);
 567
 568         /* sanity check */
 569         if ( !msgQ || (msgQ->magic != QUEUE_MAGIC) )
 570         {
 571             /* HQUEUE link list is corrupted, try to exit gracefully */
 572             WARN_(msg)("HQUEUE link list corrupted!\n");
 573             pPrev = 0;
 574             break;
 575         }
 576         pPrev = &msgQ->next;
 577     }
 578     if (pPrev && *pPrev) *pPrev = msgQueue->next;
 579     msgQueue->self = 0;
 580
 581     HeapUnlock( SystemHeap );
 582
 583     /* free up resource used by MESSAGEQUEUE strcture */
 584     msgQueue->lockCount--;
 585     QUEUE_Unlock( msgQueue );
 586
 587     return 1;
 588 }
 589
 590
 591 /***********************************************************************
 592  *           QUEUE_CreateSysMsgQueue
 593  *
 594  * Create the system message queue, and set the double-click speed.
 595  * Must be called only once.
 596  */
 597 BOOL QUEUE_CreateSysMsgQueue( int size )
 598 {
 599     /* Note: We dont need perQ data for the system message queue */
 600     if (!(hmemSysMsgQueue = QUEUE_CreateMsgQueue( FALSE )))
 601         return FALSE;
 602
 603     sysMsgQueue = (MESSAGEQUEUE *) GlobalLock16( hmemSysMsgQueue );
 604     return TRUE;
 605 }
 606
 607
 608 /***********************************************************************
 609  *           QUEUE_GetSysQueue
 610  */
 611 MESSAGEQUEUE *QUEUE_GetSysQueue(void)
 612 {
 613     return sysMsgQueue;
 614 }
 615
 616
 617 /***********************************************************************
 618  *           QUEUE_SetWakeBit
 619  *
 620  * See "Windows Internals", p.449
 621  */
 622 void QUEUE_SetWakeBit( MESSAGEQUEUE *queue, WORD bit )
 623 {
 624     TRACE_(msg)("queue = %04x (wm=%04x), bit = %04x\n",
 625                         queue->self, queue->wakeMask, bit );
 626
 627     if (bit & QS_MOUSE) pMouseQueue = queue;
 628     if (bit & QS_KEY) pKbdQueue = queue;
 629     queue->changeBits |= bit;
 630     queue->wakeBits   |= bit;
 631     if (queue->wakeMask & bit)
 632     {
 633         queue->wakeMask = 0;
 634
 635         /* Wake up thread waiting for message */
 636         if ( THREAD_IsWin16( queue->thdb ) )
 637             PostEvent16( queue->thdb->process->task );
 638         else
 639         {
 640             SetEvent( queue->hEvent );
 641         }
 642     }
 643 }
 644
 645
 646 /***********************************************************************
 647  *           QUEUE_ClearWakeBit
 648  */
 649 void QUEUE_ClearWakeBit( MESSAGEQUEUE *queue, WORD bit )
 650 {
 651     queue->changeBits &= ~bit;
 652     queue->wakeBits   &= ~bit;
 653 }
 654
 655
 656 /***********************************************************************
 657  *           QUEUE_WaitBits
 658  *
 659  * See "Windows Internals", p.447
 660  *
 661  * return values:
 662  *    0 if exit with timeout
 663  *    1 otherwise
 664  */
 665 int QUEUE_WaitBits( WORD bits, DWORD timeout )
 666 {
 667     MESSAGEQUEUE *queue;
 668     DWORD curTime = 0;
 669
 670     TRACE_(msg)("q %04x waiting for %04x\n", GetFastQueue16(), bits);
 671
 672     if ( THREAD_IsWin16( THREAD_Current() ) && (timeout != INFINITE) )
 673         curTime = GetTickCount();
 674
 675     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
 676
 677     for (;;)
 678     {
 679         if (queue->changeBits & bits)
 680         {
 681             /* One of the bits is set; we can return */
 682             queue->wakeMask = 0;
 683             QUEUE_Unlock( queue );
 684             return 1;
 685         }
 686         if (queue->wakeBits & QS_SENDMESSAGE)
 687         {
 688             /* Process the sent message immediately */
 689
 690             queue->wakeMask = 0;
 691             QUEUE_ReceiveMessage( queue );
 692             continue;                           /* nested sm crux */
 693         }
 694
 695         queue->wakeMask = bits | QS_SENDMESSAGE;
 696         if(queue->changeBits & bits)
 697         {
 698             continue;
 699         }
 700
 701         TRACE_(msg)("%04x) wakeMask is %04x, waiting\n", queue->self, queue->wakeMask);
 702
 703         if ( !THREAD_IsWin16( THREAD_Current() ) )
 704         {
 705             BOOL                bHasWin16Lock;
 706             DWORD               dwlc;
 707
 708             if ( (bHasWin16Lock = _ConfirmWin16Lock()) )
 709             {
 710                 TRACE_(msg)("bHasWin16Lock=TRUE\n");
 711                 ReleaseThunkLock( &dwlc );
 712             }
 713             WaitForSingleObject( queue->hEvent, timeout );
 714             if ( bHasWin16Lock )
 715             {
 716                 RestoreThunkLock( dwlc );
 717             }
 718         }
 719         else
 720         {
 721             if ( timeout == INFINITE )
 722                 WaitEvent16( 0 );  /* win 16 thread, use WaitEvent */
 723             else
 724             {
 725                 /* check for timeout, then give control to other tasks */
 726                 if (GetTickCount() - curTime > timeout)
 727                 {
 728
 729                     QUEUE_Unlock( queue );
 730                     return 0;   /* exit with timeout */
 731                 }
 732                 Yield16();
 733             }
 734         }
 735     }
 736 }
 737
 738
 739 /***********************************************************************
 740  *           QUEUE_AddSMSG
 741  *
 742  * This routine is called when a SMSG need to be added to one of the three
 743  * SM list.  (SM_PROCESSING_LIST, SM_PENDING_LIST, SM_WAITING_LIST)
 744  */
 745 BOOL QUEUE_AddSMSG( MESSAGEQUEUE *queue, int list, SMSG *smsg )
 746 {
 747     TRACE_(sendmsg)("queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
 748           smsg, SPY_GetMsgName(smsg->msg));
 749
 750     switch (list)
 751     {
 752         case SM_PROCESSING_LIST:
 753             /* don't need to be thread safe, only accessed by the
 754              thread associated with the sender queue */
 755             smsg->nextProcessing = queue->smProcessing;
 756             queue->smProcessing = smsg;
 757             break;
 758
 759         case SM_WAITING_LIST:
 760             /* don't need to be thread safe, only accessed by the
 761              thread associated with the receiver queue */
 762             smsg->nextWaiting = queue->smWaiting;
 763             queue->smWaiting = smsg;
 764             break;
 765
 766         case SM_PENDING_LIST:
 767         {
 768             /* make it thread safe, could be accessed by the sender and
 769              receiver thread */
 770             SMSG **prev;
 771
 772             EnterCriticalSection( &queue->cSection );
 773             smsg->nextPending = NULL;
 774             prev = &queue->smPending;
 775             while ( *prev )
 776                 prev = &(*prev)->nextPending;
 777             *prev = smsg;
 778             LeaveCriticalSection( &queue->cSection );
 779
 780             QUEUE_SetWakeBit( queue, QS_SENDMESSAGE );
 781             break;
 782         }
 783
 784         default:
 785             WARN_(sendmsg)("Invalid list: %d", list);
 786             break;
 787     }
 788
 789     return TRUE;
 790 }
 791
 792
 793 /***********************************************************************
 794  *           QUEUE_RemoveSMSG
 795  *
 796  * This routine is called when a SMSG need to be remove from one of the three
 797  * SM list.  (SM_PROCESSING_LIST, SM_PENDING_LIST, SM_WAITING_LIST)
 798  * If smsg == 0, remove the first smsg from the specified list
 799  */
 800 SMSG *QUEUE_RemoveSMSG( MESSAGEQUEUE *queue, int list, SMSG *smsg )
 801 {
 802
 803     switch (list)
 804     {
 805         case SM_PROCESSING_LIST:
 806             /* don't need to be thread safe, only accessed by the
 807              thread associated with the sender queue */
 808
 809             /* if smsg is equal to null, it means the first in the list */
 810             if (!smsg)
 811                 smsg = queue->smProcessing;
 812
 813             TRACE_(sendmsg)("queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
 814                   smsg, SPY_GetMsgName(smsg->msg));
 815             /* In fact SM_PROCESSING_LIST is a stack, and smsg
 816              should be always at the top of the list */
 817             if ( (smsg != queue->smProcessing) || !queue->smProcessing )
 818         {
 819                 ERR_(sendmsg)("smsg not at the top of Processing list, smsg=0x%p queue=0x%p", smsg, queue);
 820                 return 0;
 821             }
 822             else
 823             {
 824                 queue->smProcessing = smsg->nextProcessing;
 825                 smsg->nextProcessing = 0;
 826         }
 827             return smsg;
 828
 829         case SM_WAITING_LIST:
 830             /* don't need to be thread safe, only accessed by the
 831              thread associated with the receiver queue */
 832
 833             /* if smsg is equal to null, it means the first in the list */
 834             if (!smsg)
 835                 smsg = queue->smWaiting;
 836
 837             TRACE_(sendmsg)("queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
 838                   smsg, SPY_GetMsgName(smsg->msg));
 839             /* In fact SM_WAITING_LIST is a stack, and smsg
 840              should be always at the top of the list */
 841             if ( (smsg != queue->smWaiting) || !queue->smWaiting )
 842             {
 843                 ERR_(sendmsg)("smsg not at the top of Waiting list, smsg=0x%p queue=0x%p", smsg, queue);
 844                 return 0;
 845             }
 846             else
 847             {
 848                 queue->smWaiting = smsg->nextWaiting;
 849                 smsg->nextWaiting = 0;
 850     }
 851             return smsg;
 852
 853         case SM_PENDING_LIST:
 854             /* make it thread safe, could be accessed by the sender and
 855              receiver thread */
 856             EnterCriticalSection( &queue->cSection );
 857
 858             if (!smsg || !queue->smPending)
 859                 smsg = queue->smPending;
 860             else
 861             {
 862                 ERR_(sendmsg)("should always remove the top one in Pending list, smsg=0x%p queue=0x%p", smsg, queue);
 863                                 LeaveCriticalSection( &queue->cSection );
 864                 return 0;
 865             }
 866
 867             TRACE_(sendmsg)("queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
 868                   smsg, SPY_GetMsgName(smsg->msg));
 869
 870             queue->smPending = smsg->nextPending;
 871             smsg->nextPending = 0;
 872
 873             /* if no more SMSG in Pending list, clear QS_SENDMESSAGE flag */
 874             if (!queue->smPending)
 875                 QUEUE_ClearWakeBit( queue, QS_SENDMESSAGE );
 876
 877             LeaveCriticalSection( &queue->cSection );
 878             return smsg;
 879
 880         default:
 881             WARN_(sendmsg)("Invalid list: %d", list);
 882             break;
 883     }
 884
 885     return 0;
 886 }
 887
 888
 889 /***********************************************************************
 890  *           QUEUE_ReceiveMessage
 891  *
 892  * This routine is called when a sent message is waiting for the queue.
 893  */
 894 void QUEUE_ReceiveMessage( MESSAGEQUEUE *queue )
 895 {
 896     LRESULT       result = 0;
 897     SMSG          *smsg;
 898     MESSAGEQUEUE  *senderQ;
 899
 900     TRACE_(sendmsg)("queue %04x\n", queue->self );
 901
 902     if ( !(queue->wakeBits & QS_SENDMESSAGE) && queue->smPending )
 903     {
 904         TRACE_(sendmsg)("\trcm: nothing to do\n");
 905         return;
 906     }
 907
 908     /* remove smsg on the top of the pending list and put it in the processing list */
 909     smsg = QUEUE_RemoveSMSG(queue, SM_PENDING_LIST, 0);
 910     QUEUE_AddSMSG(queue, SM_WAITING_LIST, smsg);
 911
 912     TRACE_(sendmsg)("RM: %s [%04x] (%04x -> %04x)\n",
 913             SPY_GetMsgName(smsg->msg), smsg->msg, smsg->hSrcQueue, smsg->hDstQueue );
 914
 915     if (IsWindow( smsg->hWnd ))
 916     {
 917         WND *wndPtr = WIN_FindWndPtr( smsg->hWnd );
 918         DWORD extraInfo = queue->GetMessageExtraInfoVal; /* save ExtraInfo */
 919
 920         /* use sender queue extra info value while calling the window proc */
 921         senderQ = (MESSAGEQUEUE*)QUEUE_Lock( smsg->hSrcQueue );
 922         if (senderQ)
 923   {
 924             queue->GetMessageExtraInfoVal = senderQ->GetMessageExtraInfoVal;
 925             QUEUE_Unlock( senderQ );
 926         }
 927
 928         /* call the right version of CallWindowProcXX */
 929         if (smsg->flags & SMSG_WIN32)
 930         {
 931             TRACE_(sendmsg)("\trcm: msg is Win32\n" );
 932             if (smsg->flags & SMSG_UNICODE)
 933                 result = CallWindowProcW( wndPtr->winproc,
 934                                             smsg->hWnd, smsg->msg,
 935                                             smsg->wParam, smsg->lParam );
 936             else
 937                 result = CallWindowProcA( wndPtr->winproc,
 938                                             smsg->hWnd, smsg->msg,
 939                                             smsg->wParam, smsg->lParam );
 940         }
 941         else  /* Win16 message */
 942             result = CallWindowProc16( (WNDPROC16)wndPtr->winproc,
 943                                        (HWND16) smsg->hWnd,
 944                                        (UINT16) smsg->msg,
 945                                        LOWORD (smsg->wParam),
 946                                        smsg->lParam );
 947
 948         queue->GetMessageExtraInfoVal = extraInfo;  /* Restore extra info */
 949         WIN_ReleaseWndPtr(wndPtr);
 950         TRACE_(sendmsg)("result =  %08x\n", (unsigned)result );
 951     }
 952     else WARN_(sendmsg)("\trcm: bad hWnd\n");
 953
 954
 955         /* set SMSG_SENDING_REPLY flag to tell ReplyMessage16, it's not
 956          an early reply */
 957         smsg->flags |= SMSG_SENDING_REPLY;
 958         ReplyMessage( result );
 959
 960     TRACE_(sendmsg)("done! \n" );
 961 }
 962
 963
 964
 965 /***********************************************************************
 966  *           QUEUE_AddMsg
 967  *
 968  * Add a message to the queue. Return FALSE if queue is full.
 969  */
 970 BOOL QUEUE_AddMsg( HQUEUE16 hQueue, MSG *msg, DWORD extraInfo )
 971 {
 972     MESSAGEQUEUE *msgQueue;
 973     QMSG         *qmsg;
 974
 975
 976     if (!(msgQueue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return FALSE;
 977
 978     /* allocate new message in global heap for now */
 979     if (!(qmsg = (QMSG *) HeapAlloc( SystemHeap, 0, sizeof(QMSG) ) ))
 980     {
 981         QUEUE_Unlock( msgQueue );
 982         return 0;
 983     }
 984
 985     EnterCriticalSection( &msgQueue->cSection );
 986
 987       /* Store message */
 988     qmsg->msg = *msg;
 989     qmsg->extraInfo = extraInfo;
 990
 991     /* insert the message in the link list */
 992     qmsg->nextMsg = 0;
 993     qmsg->prevMsg = msgQueue->lastMsg;
 994
 995     if (msgQueue->lastMsg)
 996         msgQueue->lastMsg->nextMsg = qmsg;
 997
 998     /* update first and last anchor in message queue */
 999     msgQueue->lastMsg = qmsg;
1000     if (!msgQueue->firstMsg)
1001         msgQueue->firstMsg = qmsg;
1002
1003     msgQueue->msgCount++;
1004
1005     LeaveCriticalSection( &msgQueue->cSection );
1006
1007     QUEUE_SetWakeBit( msgQueue, QS_POSTMESSAGE );
1008     QUEUE_Unlock( msgQueue );
1009
1010     return TRUE;
1011 }
1012
1013
1014
1015 /***********************************************************************
1016  *           QUEUE_FindMsg
1017  *
1018  * Find a message matching the given parameters. Return -1 if none available.
1019  */
1020 QMSG* QUEUE_FindMsg( MESSAGEQUEUE * msgQueue, HWND hwnd, int first, int last )
1021 {
1022     QMSG* qmsg;
1023
1024     EnterCriticalSection( &msgQueue->cSection );
1025
1026     if (!msgQueue->msgCount)
1027         qmsg = 0;
1028     else if (!hwnd && !first && !last)
1029         qmsg = msgQueue->firstMsg;
1030     else
1031     {
1032         /* look in linked list for message matching first and last criteria */
1033         for (qmsg = msgQueue->firstMsg; qmsg; qmsg = qmsg->nextMsg)
1034     {
1035             MSG *msg = &(qmsg->msg);
1036
1037         if (!hwnd || (msg->hwnd == hwnd))
1038         {
1039                 if (!first && !last)
1040                     break;   /* found it */
1041
1042                 if ((msg->message >= first) && (!last || (msg->message <= last)))
1043                     break;   /* found it */
1044             }
1045         }
1046     }
1047
1048     LeaveCriticalSection( &msgQueue->cSection );
1049
1050     return qmsg;
1051 }
1052
1053
1054
1055 /***********************************************************************
1056  *           QUEUE_RemoveMsg
1057  *
1058  * Remove a message from the queue (pos must be a valid position).
1059  */
1060 void QUEUE_RemoveMsg( MESSAGEQUEUE * msgQueue, QMSG *qmsg )
1061 {
1062     EnterCriticalSection( &msgQueue->cSection );
1063
1064     /* set the linked list */
1065     if (qmsg->prevMsg)
1066         qmsg->prevMsg->nextMsg = qmsg->nextMsg;
1067
1068     if (qmsg->nextMsg)
1069         qmsg->nextMsg->prevMsg = qmsg->prevMsg;
1070
1071     if (msgQueue->firstMsg == qmsg)
1072         msgQueue->firstMsg = qmsg->nextMsg;
1073
1074     if (msgQueue->lastMsg == qmsg)
1075         msgQueue->lastMsg = qmsg->prevMsg;
1076
1077     /* deallocate the memory for the message */
1078     HeapFree( SystemHeap, 0, qmsg );
1079
1080     msgQueue->msgCount--;
1081     if (!msgQueue->msgCount) msgQueue->wakeBits &= ~QS_POSTMESSAGE;
1082
1083     LeaveCriticalSection( &msgQueue->cSection );
1084 }
1085
1086
1087 /***********************************************************************
1088  *           QUEUE_WakeSomeone
1089  *
1090  * Wake a queue upon reception of a hardware event.
1091  */
1092 static void QUEUE_WakeSomeone( UINT message )
1093 {
1094     WND*          wndPtr = NULL;
1095     WORD          wakeBit;
1096     HWND hwnd;
1097     HQUEUE16     hQueue = 0;
1098     MESSAGEQUEUE *queue = NULL;
1099
1100     if (hCursorQueue)
1101         hQueue = hCursorQueue;
1102
1103     if( (message >= WM_KEYFIRST) && (message <= WM_KEYLAST) )
1104     {
1105        wakeBit = QS_KEY;
1106        if( hActiveQueue )
1107            hQueue = hActiveQueue;
1108     }
1109     else
1110     {
1111        wakeBit = (message == WM_MOUSEMOVE) ? QS_MOUSEMOVE : QS_MOUSEBUTTON;
1112        if( (hwnd = GetCapture()) )
1113          if( (wndPtr = WIN_FindWndPtr( hwnd )) )
1114            {
1115                hQueue = wndPtr->hmemTaskQ;
1116                WIN_ReleaseWndPtr(wndPtr);
1117            }
1118     }
1119
1120     if( (hwnd = GetSysModalWindow16()) )
1121     {
1122       if( (wndPtr = WIN_FindWndPtr( hwnd )) )
1123         {
1124             hQueue = wndPtr->hmemTaskQ;
1125             WIN_ReleaseWndPtr(wndPtr);
1126         }
1127     }
1128
1129     if (hQueue)
1130         queue = QUEUE_Lock( hQueue );
1131
1132     if( !queue )
1133     {
1134         queue = QUEUE_Lock( hFirstQueue );
1135       while( queue )
1136       {
1137         if (queue->wakeMask & wakeBit) break;
1138
1139             QUEUE_Unlock(queue);
1140             queue = QUEUE_Lock( queue->next );
1141       }
1142       if( !queue )
1143       {
1144         WARN_(msg)("couldn't find queue\n");
1145         return;
1146       }
1147     }
1148
1149     QUEUE_SetWakeBit( queue, wakeBit );
1150
1151     QUEUE_Unlock( queue );
1152 }
1153
1154
1155 /***********************************************************************
1156  *           hardware_event
1157  *
1158  * Add an event to the system message queue.
1159  * Note: the position is relative to the desktop window.
1160  */
1161 void hardware_event( WORD message, WORD wParam, LONG lParam,
1162                      int xPos, int yPos, DWORD time, DWORD extraInfo )
1163 {
1164     MSG *msg;
1165     QMSG  *qmsg;
1166     int  mergeMsg = 0;
1167
1168     if (!sysMsgQueue) return;
1169
1170     EnterCriticalSection( &sysMsgQueue->cSection );
1171
1172     /* Merge with previous event if possible */
1173     qmsg = sysMsgQueue->lastMsg;
1174
1175     if ((message == WM_MOUSEMOVE) && sysMsgQueue->lastMsg)
1176     {
1177         msg = &(sysMsgQueue->lastMsg->msg);
1178
1179         if ((msg->message == message) && (msg->wParam == wParam))
1180         {
1181             /* Merge events */
1182             qmsg = sysMsgQueue->lastMsg;
1183             mergeMsg = 1;
1184     }
1185     }
1186
1187     if (!mergeMsg)
1188     {
1189         /* Should I limit the number of message in
1190           the system message queue??? */
1191
1192         /* Don't merge allocate a new msg in the global heap */
1193
1194         if (!(qmsg = (QMSG *) HeapAlloc( SystemHeap, 0, sizeof(QMSG) ) ))
1195         {
1196             LeaveCriticalSection( &sysMsgQueue->cSection );
1197             return;
1198         }
1199
1200         /* put message at the end of the linked list */
1201         qmsg->nextMsg = 0;
1202         qmsg->prevMsg = sysMsgQueue->lastMsg;
1203
1204         if (sysMsgQueue->lastMsg)
1205             sysMsgQueue->lastMsg->nextMsg = qmsg;
1206
1207         /* set last and first anchor index in system message queue */
1208         sysMsgQueue->lastMsg = qmsg;
1209         if (!sysMsgQueue->firstMsg)
1210             sysMsgQueue->firstMsg = qmsg;
1211
1212         sysMsgQueue->msgCount++;
1213     }
1214
1215       /* Store message */
1216     msg = &(qmsg->msg);
1217     msg->hwnd    = 0;
1218     msg->message = message;
1219     msg->wParam  = wParam;
1220     msg->lParam  = lParam;
1221     msg->time    = time;
1222     msg->pt.x    = xPos;
1223     msg->pt.y    = yPos;
1224     qmsg->extraInfo = extraInfo;
1225
1226     LeaveCriticalSection( &sysMsgQueue->cSection );
1227
1228     QUEUE_WakeSomeone( message );
1229 }
1230
1231
1232 /***********************************************************************
1233  *           QUEUE_GetQueueTask
1234  */
1235 HTASK16 QUEUE_GetQueueTask( HQUEUE16 hQueue )
1236 {
1237     HTASK16 hTask = 0;
1238
1239     MESSAGEQUEUE *queue = QUEUE_Lock( hQueue );
1240
1241     if (queue)
1242 {
1243         hTask = queue->thdb->process->task;
1244         QUEUE_Unlock( queue );
1245 }
1246
1247     return hTask;
1248 }
1249
1250
1251
1252 /***********************************************************************
1253  *           QUEUE_IncPaintCount
1254  */
1255 void QUEUE_IncPaintCount( HQUEUE16 hQueue )
1256 {
1257     MESSAGEQUEUE *queue;
1258
1259     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1260     queue->wPaintCount++;
1261     QUEUE_SetWakeBit( queue, QS_PAINT );
1262     QUEUE_Unlock( queue );
1263 }
1264
1265
1266 /***********************************************************************
1267  *           QUEUE_DecPaintCount
1268  */
1269 void QUEUE_DecPaintCount( HQUEUE16 hQueue )
1270 {
1271     MESSAGEQUEUE *queue;
1272
1273     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1274     queue->wPaintCount--;
1275     if (!queue->wPaintCount) queue->wakeBits &= ~QS_PAINT;
1276     QUEUE_Unlock( queue );
1277 }
1278
1279
1280 /***********************************************************************
1281  *           QUEUE_IncTimerCount
1282  */
1283 void QUEUE_IncTimerCount( HQUEUE16 hQueue )
1284 {
1285     MESSAGEQUEUE *queue;
1286
1287     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1288     queue->wTimerCount++;
1289     QUEUE_SetWakeBit( queue, QS_TIMER );
1290     QUEUE_Unlock( queue );
1291 }
1292
1293
1294 /***********************************************************************
1295  *           QUEUE_DecTimerCount
1296  */
1297 void QUEUE_DecTimerCount( HQUEUE16 hQueue )
1298 {
1299     MESSAGEQUEUE *queue;
1300
1301     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue ))) return;
1302     queue->wTimerCount--;
1303     if (!queue->wTimerCount) queue->wakeBits &= ~QS_TIMER;
1304     QUEUE_Unlock( queue );
1305 }
1306
1307
1308 /***********************************************************************
1309  *           PostQuitMessage16   (USER.6)
1310  */
1311 void WINAPI PostQuitMessage16( INT16 exitCode )
1312 {
1313     PostQuitMessage( exitCode );
1314 }
1315
1316
1317 /***********************************************************************
1318  *           PostQuitMessage32   (USER32.421)
1319  *
1320  * PostQuitMessage() posts a message to the system requesting an
1321  * application to terminate execution. As a result of this function,
1322  * the WM_QUIT message is posted to the application, and
1323  * PostQuitMessage() returns immediately.  The exitCode parameter
1324  * specifies an application-defined exit code, which appears in the
1325  * _wParam_ parameter of the WM_QUIT message posted to the application.
1326  *
1327  * CONFORMANCE
1328  *
1329  *  ECMA-234, Win32
1330  */
1331 void WINAPI PostQuitMessage( INT exitCode )
1332 {
1333     MESSAGEQUEUE *queue;
1334
1335     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return;
1336     queue->wPostQMsg = TRUE;
1337     queue->wExitCode = (WORD)exitCode;
1338     QUEUE_Unlock( queue );
1339 }
1340
1341
1342 /***********************************************************************
1343  *           GetWindowTask16   (USER.224)
1344  */
1345 HTASK16 WINAPI GetWindowTask16( HWND16 hwnd )
1346 {
1347     HTASK16 retvalue;
1348     WND *wndPtr = WIN_FindWndPtr( hwnd );
1349
1350     if (!wndPtr) return 0;
1351     retvalue = QUEUE_GetQueueTask( wndPtr->hmemTaskQ );
1352     WIN_ReleaseWndPtr(wndPtr);
1353     return retvalue;
1354 }
1355
1356 /***********************************************************************
1357  *           GetWindowThreadProcessId   (USER32.313)
1358  */
1359 DWORD WINAPI GetWindowThreadProcessId( HWND hwnd, LPDWORD process )
1360 {
1361     DWORD retvalue;
1362     MESSAGEQUEUE *queue;
1363
1364     WND *wndPtr = WIN_FindWndPtr( hwnd );
1365     if (!wndPtr) return 0;
1366
1367     queue = QUEUE_Lock( wndPtr->hmemTaskQ );
1368     WIN_ReleaseWndPtr(wndPtr);
1369
1370     if (!queue) return 0;
1371
1372     if ( process ) *process = (DWORD)queue->thdb->process->server_pid;
1373     retvalue = (DWORD)queue->thdb->server_tid;
1374
1375     QUEUE_Unlock( queue );
1376     return retvalue;
1377 }
1378
1379
1380 /***********************************************************************
1381  *           SetMessageQueue16   (USER.266)
1382  */
1383 BOOL16 WINAPI SetMessageQueue16( INT16 size )
1384 {
1385     return SetMessageQueue( size );
1386 }
1387
1388
1389 /***********************************************************************
1390  *           SetMessageQueue32   (USER32.494)
1391  */
1392 BOOL WINAPI SetMessageQueue( INT size )
1393 {
1394     /* now obsolete the message queue will be expanded dynamically
1395      as necessary */
1396
1397     /* access the queue to create it if it's not existing */
1398     GetFastQueue16();
1399
1400     return TRUE;
1401 }
1402
1403 /***********************************************************************
1404  *           InitThreadInput   (USER.409)
1405  */
1406 HQUEUE16 WINAPI InitThreadInput16( WORD unknown, WORD flags )
1407 {
1408     HQUEUE16 hQueue;
1409     MESSAGEQUEUE *queuePtr;
1410
1411     THDB *thdb = THREAD_Current();
1412
1413     if (!thdb)
1414         return 0;
1415
1416     hQueue = thdb->teb.queue;
1417
1418     if ( !hQueue )
1419     {
1420         /* Create thread message queue */
1421         if( !(hQueue = QUEUE_CreateMsgQueue( TRUE )))
1422         {
1423             WARN_(msg)("failed!\n");
1424             return FALSE;
1425     }
1426
1427         /* Link new queue into list */
1428         queuePtr = (MESSAGEQUEUE *)QUEUE_Lock( hQueue );
1429         queuePtr->thdb = THREAD_Current();
1430
1431         HeapLock( SystemHeap );  /* FIXME: a bit overkill */
1432         SetThreadQueue16( 0, hQueue );
1433         thdb->teb.queue = hQueue;
1434
1435         queuePtr->next  = hFirstQueue;
1436         hFirstQueue = hQueue;
1437         HeapUnlock( SystemHeap );
1438
1439         QUEUE_Unlock( queuePtr );
1440     }
1441
1442     return hQueue;
1443 }
1444
1445 /***********************************************************************
1446  *           GetQueueStatus16   (USER.334)
1447  */
1448 DWORD WINAPI GetQueueStatus16( UINT16 flags )
1449 {
1450     MESSAGEQUEUE *queue;
1451     DWORD ret;
1452
1453     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1454     ret = MAKELONG( queue->changeBits, queue->wakeBits );
1455     queue->changeBits = 0;
1456     QUEUE_Unlock( queue );
1457
1458     return ret & MAKELONG( flags, flags );
1459 }
1460
1461 /***********************************************************************
1462  *           GetQueueStatus32   (USER32.283)
1463  */
1464 DWORD WINAPI GetQueueStatus( UINT flags )
1465 {
1466     MESSAGEQUEUE *queue;
1467     DWORD ret;
1468
1469     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1470     ret = MAKELONG( queue->changeBits, queue->wakeBits );
1471     queue->changeBits = 0;
1472     QUEUE_Unlock( queue );
1473
1474     return ret & MAKELONG( flags, flags );
1475 }
1476
1477
1478 /***********************************************************************
1479  *           GetInputState16   (USER.335)
1480  */
1481 BOOL16 WINAPI GetInputState16(void)
1482 {
1483     return GetInputState();
1484 }
1485
1486 /***********************************************************************
1487  *           WaitForInputIdle   (USER32.577)
1488  */
1489 DWORD WINAPI WaitForInputIdle (HANDLE hProcess, DWORD dwTimeOut)
1490 {
1491   FIXME_(msg)("(hProcess=%d, dwTimeOut=%ld): stub\n", hProcess, dwTimeOut);
1492
1493   return WAIT_TIMEOUT;
1494 }
1495
1496
1497 /***********************************************************************
1498  *           GetInputState32   (USER32.244)
1499  */
1500 BOOL WINAPI GetInputState(void)
1501 {
1502     MESSAGEQUEUE *queue;
1503     BOOL ret;
1504
1505     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() )))
1506         return FALSE;
1507     ret = queue->wakeBits & (QS_KEY | QS_MOUSEBUTTON);
1508     QUEUE_Unlock( queue );
1509
1510     return ret;
1511 }
1512
1513 /***********************************************************************
1514  *           UserYield  (USER.332)
1515  */
1516 void WINAPI UserYield16(void)
1517 {
1518     MESSAGEQUEUE *queue;
1519
1520     /* Handle sent messages */
1521     queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() );
1522
1523     while (queue && (queue->wakeBits & QS_SENDMESSAGE))
1524         QUEUE_ReceiveMessage( queue );
1525
1526     QUEUE_Unlock( queue );
1527
1528     /* Yield */
1529     if ( THREAD_IsWin16( THREAD_Current() ) )
1530         OldYield16();
1531     else
1532     {
1533         DWORD  count;
1534
1535        ReleaseThunkLock(&count);
1536        RestoreThunkLock(count);
1537     }
1538
1539     /* Handle sent messages again */
1540     queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() );
1541
1542     while (queue && (queue->wakeBits & QS_SENDMESSAGE))
1543         QUEUE_ReceiveMessage( queue );
1544
1545     QUEUE_Unlock( queue );
1546 }
1547
1548 /***********************************************************************
1549  *           GetMessagePos   (USER.119) (USER32.272)
1550  *
1551  * The GetMessagePos() function returns a long value representing a
1552  * cursor position, in screen coordinates, when the last message
1553  * retrieved by the GetMessage() function occurs. The x-coordinate is
1554  * in the low-order word of the return value, the y-coordinate is in
1555  * the high-order word. The application can use the MAKEPOINT()
1556  * macro to obtain a POINT structure from the return value.
1557  *
1558  * For the current cursor position, use GetCursorPos().
1559  *
1560  * RETURNS
1561  *
1562  * Cursor position of last message on success, zero on failure.
1563  *
1564  * CONFORMANCE
1565  *
1566  * ECMA-234, Win32
1567  *
1568  */
1569 DWORD WINAPI GetMessagePos(void)
1570 {
1571     MESSAGEQUEUE *queue;
1572     DWORD ret;
1573
1574     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1575     ret = queue->GetMessagePosVal;
1576     QUEUE_Unlock( queue );
1577
1578     return ret;
1579 }
1580
1581
1582 /***********************************************************************
1583  *           GetMessageTime   (USER.120) (USER32.273)
1584  *
1585  * GetMessageTime() returns the message time for the last message
1586  * retrieved by the function. The time is measured in milliseconds with
1587  * the same offset as GetTickCount().
1588  *
1589  * Since the tick count wraps, this is only useful for moderately short
1590  * relative time comparisons.
1591  *
1592  * RETURNS
1593  *
1594  * Time of last message on success, zero on failure.
1595  *
1596  * CONFORMANCE
1597  *
1598  * ECMA-234, Win32
1599  *
1600  */
1601 LONG WINAPI GetMessageTime(void)
1602 {
1603     MESSAGEQUEUE *queue;
1604     LONG ret;
1605
1606     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1607     ret = queue->GetMessageTimeVal;
1608     QUEUE_Unlock( queue );
1609
1610     return ret;
1611 }
1612
1613
1614 /***********************************************************************
1615  *           GetMessageExtraInfo   (USER.288) (USER32.271)
1616  */
1617 LONG WINAPI GetMessageExtraInfo(void)
1618 {
1619     MESSAGEQUEUE *queue;
1620     LONG ret;
1621
1622     if (!(queue = (MESSAGEQUEUE *)QUEUE_Lock( GetFastQueue16() ))) return 0;
1623     ret = queue->GetMessageExtraInfoVal;
1624     QUEUE_Unlock( queue );
1625
1626     return ret;
1627 }