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 "winerror.h"
  12 #include "wine/winbase16.h"
  13 #include "wine/winuser16.h"
  14 #include "queue.h"
  15 #include "win.h"
  16 #include "hook.h"
  17 #include "thread.h"
  18 #include "debugtools.h"
  19 #include "server.h"
  20 #include "spy.h"
  21
  22 DECLARE_DEBUG_CHANNEL(msg);
  23 DECLARE_DEBUG_CHANNEL(sendmsg);
  24
  25 #define MAX_QUEUE_SIZE   120  /* Max. size of a message queue */
  26
  27 static HQUEUE16 hFirstQueue = 0;
  28 static HQUEUE16 hExitingQueue = 0;
  29 static HQUEUE16 hmemSysMsgQueue = 0;
  30 static MESSAGEQUEUE *sysMsgQueue = NULL;
  31 static PERQUEUEDATA *pQDataWin16 = NULL;  /* Global perQData for Win16 tasks */
  32
  33 static MESSAGEQUEUE *pMouseQueue = NULL;  /* Queue for last mouse message */
  34 static MESSAGEQUEUE *pKbdQueue = NULL;    /* Queue for last kbd message */
  35
  36 HQUEUE16 hCursorQueue = 0;
  37 HQUEUE16 hActiveQueue = 0;
  38
  39
  40 /***********************************************************************
  41  *           PERQDATA_CreateInstance
  42  *
  43  * Creates an instance of a reference counted PERQUEUEDATA element
  44  * for the message queue. perQData is stored globally for 16 bit tasks.
  45  *
  46  * Note: We don't implement perQdata exactly the same way Windows does.
  47  * Each perQData element is reference counted since it may be potentially
  48  * shared by multiple message Queues (via AttachThreadInput).
  49  * We only store the current values for Active, Capture and focus windows
  50  * currently.
  51  */
  52 PERQUEUEDATA * PERQDATA_CreateInstance( )
  53 {
  54     PERQUEUEDATA *pQData;
  55
  56     BOOL16 bIsWin16 = 0;
  57
  58     TRACE_(msg)("()\n");
  59
  60     /* Share a single instance of perQData for all 16 bit tasks */
  61     if ( ( bIsWin16 = THREAD_IsWin16( NtCurrentTeb() ) ) )
  62     {
  63         /* If previously allocated, just bump up ref count */
  64         if ( pQDataWin16 )
  65         {
  66             PERQDATA_Addref( pQDataWin16 );
  67             return pQDataWin16;
  68         }
  69     }
  70
  71     /* Allocate PERQUEUEDATA from the system heap */
  72     if (!( pQData = (PERQUEUEDATA *) HeapAlloc( GetProcessHeap(), 0,
  73                                                     sizeof(PERQUEUEDATA) ) ))
  74         return 0;
  75
  76     /* Initialize */
  77     pQData->hWndCapture = pQData->hWndFocus = pQData->hWndActive = 0;
  78     pQData->ulRefCount = 1;
  79     pQData->nCaptureHT = HTCLIENT;
  80
  81     /* Note: We have an independent critical section for the per queue data
  82      * since this may be shared by different threads. see AttachThreadInput()
  83      */
  84     InitializeCriticalSection( &pQData->cSection );
  85     /* FIXME: not all per queue data critical sections should be global */
  86     MakeCriticalSectionGlobal( &pQData->cSection );
  87
  88     /* Save perQData globally for 16 bit tasks */
  89     if ( bIsWin16 )
  90         pQDataWin16 = pQData;
  91
  92     return pQData;
  93 }
  94
  95
  96 /***********************************************************************
  97  *           PERQDATA_Addref
  98  *
  99  * Increment reference count for the PERQUEUEDATA instance
 100  * Returns reference count for debugging purposes
 101  */
 102 ULONG PERQDATA_Addref( PERQUEUEDATA *pQData )
 103 {
 104     assert(pQData != 0 );
 105     TRACE_(msg)("(): current refcount %lu ...\n", pQData->ulRefCount);
 106
 107     EnterCriticalSection( &pQData->cSection );
 108     ++pQData->ulRefCount;
 109     LeaveCriticalSection( &pQData->cSection );
 110
 111     return pQData->ulRefCount;
 112 }
 113
 114
 115 /***********************************************************************
 116  *           PERQDATA_Release
 117  *
 118  * Release a reference to a PERQUEUEDATA instance.
 119  * Destroy the instance if no more references exist
 120  * Returns reference count for debugging purposes
 121  */
 122 ULONG PERQDATA_Release( PERQUEUEDATA *pQData )
 123 {
 124     assert(pQData != 0 );
 125     TRACE_(msg)("(): current refcount %lu ...\n",
 126           (LONG)pQData->ulRefCount );
 127
 128     EnterCriticalSection( &pQData->cSection );
 129     if ( --pQData->ulRefCount == 0 )
 130     {
 131         LeaveCriticalSection( &pQData->cSection );
 132         DeleteCriticalSection( &pQData->cSection );
 133
 134         TRACE_(msg)("(): deleting PERQUEUEDATA instance ...\n" );
 135
 136         /* Deleting our global 16 bit perQData? */
 137         if ( pQData == pQDataWin16 )
 138             pQDataWin16 = 0;
 139
 140         /* Free the PERQUEUEDATA instance */
 141         HeapFree( GetProcessHeap(), 0, pQData );
 142
 143         return 0;
 144     }
 145     LeaveCriticalSection( &pQData->cSection );
 146
 147     return pQData->ulRefCount;
 148 }
 149
 150
 151 /***********************************************************************
 152  *           PERQDATA_GetFocusWnd
 153  *
 154  * Get the focus hwnd member in a threadsafe manner
 155  */
 156 HWND PERQDATA_GetFocusWnd( PERQUEUEDATA *pQData )
 157 {
 158     HWND hWndFocus;
 159     assert(pQData != 0 );
 160
 161     EnterCriticalSection( &pQData->cSection );
 162     hWndFocus = pQData->hWndFocus;
 163     LeaveCriticalSection( &pQData->cSection );
 164
 165     return hWndFocus;
 166 }
 167
 168
 169 /***********************************************************************
 170  *           PERQDATA_SetFocusWnd
 171  *
 172  * Set the focus hwnd member in a threadsafe manner
 173  */
 174 HWND PERQDATA_SetFocusWnd( PERQUEUEDATA *pQData, HWND hWndFocus )
 175 {
 176     HWND hWndFocusPrv;
 177     assert(pQData != 0 );
 178
 179     EnterCriticalSection( &pQData->cSection );
 180     hWndFocusPrv = pQData->hWndFocus;
 181     pQData->hWndFocus = hWndFocus;
 182     LeaveCriticalSection( &pQData->cSection );
 183
 184     return hWndFocusPrv;
 185 }
 186
 187
 188 /***********************************************************************
 189  *           PERQDATA_GetActiveWnd
 190  *
 191  * Get the active hwnd member in a threadsafe manner
 192  */
 193 HWND PERQDATA_GetActiveWnd( PERQUEUEDATA *pQData )
 194 {
 195     HWND hWndActive;
 196     assert(pQData != 0 );
 197
 198     EnterCriticalSection( &pQData->cSection );
 199     hWndActive = pQData->hWndActive;
 200     LeaveCriticalSection( &pQData->cSection );
 201
 202     return hWndActive;
 203 }
 204
 205
 206 /***********************************************************************
 207  *           PERQDATA_SetActiveWnd
 208  *
 209  * Set the active focus hwnd member in a threadsafe manner
 210  */
 211 HWND PERQDATA_SetActiveWnd( PERQUEUEDATA *pQData, HWND hWndActive )
 212 {
 213     HWND hWndActivePrv;
 214     assert(pQData != 0 );
 215
 216     EnterCriticalSection( &pQData->cSection );
 217     hWndActivePrv = pQData->hWndActive;
 218     pQData->hWndActive = hWndActive;
 219     LeaveCriticalSection( &pQData->cSection );
 220
 221     return hWndActivePrv;
 222 }
 223
 224
 225 /***********************************************************************
 226  *           PERQDATA_GetCaptureWnd
 227  *
 228  * Get the capture hwnd member in a threadsafe manner
 229  */
 230 HWND PERQDATA_GetCaptureWnd( PERQUEUEDATA *pQData )
 231 {
 232     HWND hWndCapture;
 233     assert(pQData != 0 );
 234
 235     EnterCriticalSection( &pQData->cSection );
 236     hWndCapture = pQData->hWndCapture;
 237     LeaveCriticalSection( &pQData->cSection );
 238
 239     return hWndCapture;
 240 }
 241
 242
 243 /***********************************************************************
 244  *           PERQDATA_SetCaptureWnd
 245  *
 246  * Set the capture hwnd member in a threadsafe manner
 247  */
 248 HWND PERQDATA_SetCaptureWnd( PERQUEUEDATA *pQData, HWND hWndCapture )
 249 {
 250     HWND hWndCapturePrv;
 251     assert(pQData != 0 );
 252
 253     EnterCriticalSection( &pQData->cSection );
 254     hWndCapturePrv = pQData->hWndCapture;
 255     pQData->hWndCapture = hWndCapture;
 256     LeaveCriticalSection( &pQData->cSection );
 257
 258     return hWndCapturePrv;
 259 }
 260
 261
 262 /***********************************************************************
 263  *           PERQDATA_GetCaptureInfo
 264  *
 265  * Get the capture info member in a threadsafe manner
 266  */
 267 INT16 PERQDATA_GetCaptureInfo( PERQUEUEDATA *pQData )
 268 {
 269     INT16 nCaptureHT;
 270     assert(pQData != 0 );
 271
 272     EnterCriticalSection( &pQData->cSection );
 273     nCaptureHT = pQData->nCaptureHT;
 274     LeaveCriticalSection( &pQData->cSection );
 275
 276     return nCaptureHT;
 277 }
 278
 279
 280 /***********************************************************************
 281  *           PERQDATA_SetCaptureInfo
 282  *
 283  * Set the capture info member in a threadsafe manner
 284  */
 285 INT16 PERQDATA_SetCaptureInfo( PERQUEUEDATA *pQData, INT16 nCaptureHT )
 286 {
 287     INT16 nCaptureHTPrv;
 288     assert(pQData != 0 );
 289
 290     EnterCriticalSection( &pQData->cSection );
 291     nCaptureHTPrv = pQData->nCaptureHT;
 292     pQData->nCaptureHT = nCaptureHT;
 293     LeaveCriticalSection( &pQData->cSection );
 294
 295     return nCaptureHTPrv;
 296 }
 297
 298
 299 /***********************************************************************
 300  *           QUEUE_Lock
 301  *
 302  * Function for getting a 32 bit pointer on queue structure. For thread
 303  * safeness programmers should use this function instead of GlobalLock to
 304  * retrieve a pointer on the structure. QUEUE_Unlock should also be called
 305  * when access to the queue structure is not required anymore.
 306  */
 307 MESSAGEQUEUE *QUEUE_Lock( HQUEUE16 hQueue )
 308 {
 309     MESSAGEQUEUE *queue;
 310
 311     HeapLock( GetProcessHeap() );  /* FIXME: a bit overkill */
 312     queue = GlobalLock16( hQueue );
 313     if ( !queue || (queue->magic != QUEUE_MAGIC) )
 314     {
 315         HeapUnlock( GetProcessHeap() );
 316         return NULL;
 317     }
 318
 319     queue->lockCount++;
 320     HeapUnlock( GetProcessHeap() );
 321     return queue;
 322 }
 323
 324
 325 /***********************************************************************
 326  *           QUEUE_Unlock
 327  *
 328  * Use with QUEUE_Lock to get a thread safe access to message queue
 329  * structure
 330  */
 331 void QUEUE_Unlock( MESSAGEQUEUE *queue )
 332 {
 333     if (queue)
 334     {
 335         HeapLock( GetProcessHeap() );  /* FIXME: a bit overkill */
 336
 337         if ( --queue->lockCount == 0 )
 338         {
 339             DeleteCriticalSection ( &queue->cSection );
 340             if (queue->server_queue)
 341                 CloseHandle( queue->server_queue );
 342             GlobalFree16( queue->self );
 343         }
 344
 345         HeapUnlock( GetProcessHeap() );
 346     }
 347 }
 348
 349
 350 /***********************************************************************
 351  *           QUEUE_DumpQueue
 352  */
 353 void QUEUE_DumpQueue( HQUEUE16 hQueue )
 354 {
 355     MESSAGEQUEUE *pq;
 356
 357     if (!(pq = QUEUE_Lock( hQueue )) )
 358     {
 359         WARN_(msg)("%04x is not a queue handle\n", hQueue );
 360         return;
 361     }
 362
 363     EnterCriticalSection( &pq->cSection );
 364
 365     DPRINTF( "next: %12.4x  Intertask SendMessage:\n"
 366              "thread: %10p  ----------------------\n"
 367              "firstMsg: %8p   smWaiting:     %10p\n"
 368              "lastMsg:  %8p   smPending:     %10p\n"
 369              "msgCount: %8.4x   smProcessing:  %10p\n"
 370              "lockCount: %7.4x\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->teb, pq->firstMsg, pq->smWaiting, pq->lastMsg,
 377              pq->smPending, pq->msgCount, pq->smProcessing,
 378              (unsigned)pq->lockCount, pq->wPaintCount, pq->wTimerCount,
 379              pq->wakeBits, pq->wakeMask, pq->hCurHook);
 380
 381     LeaveCriticalSection( &pq->cSection );
 382
 383     QUEUE_Unlock( pq );
 384 }
 385
 386
 387 /***********************************************************************
 388  *           QUEUE_WalkQueues
 389  */
 390 void QUEUE_WalkQueues(void)
 391 {
 392     char module[10];
 393     HQUEUE16 hQueue = hFirstQueue;
 394
 395     DPRINTF( "Queue Msgs Thread   Task Module\n" );
 396     while (hQueue)
 397     {
 398         MESSAGEQUEUE *queue = QUEUE_Lock( hQueue );
 399         if (!queue)
 400         {
 401             WARN_(msg)("Bad queue handle %04x\n", hQueue );
 402             return;
 403         }
 404         if (!GetModuleName16( queue->teb->htask16, module, sizeof(module )))
 405             strcpy( module, "???" );
 406         DPRINTF( "%04x %4d %p %04x %s\n", hQueue,queue->msgCount,
 407                  queue->teb, queue->teb->htask16, module );
 408         hQueue = queue->next;
 409         QUEUE_Unlock( queue );
 410     }
 411     DPRINTF( "\n" );
 412 }
 413
 414
 415 /***********************************************************************
 416  *           QUEUE_IsExitingQueue
 417  */
 418 BOOL QUEUE_IsExitingQueue( HQUEUE16 hQueue )
 419 {
 420     return (hExitingQueue && (hQueue == hExitingQueue));
 421 }
 422
 423
 424 /***********************************************************************
 425  *           QUEUE_SetExitingQueue
 426  */
 427 void QUEUE_SetExitingQueue( HQUEUE16 hQueue )
 428 {
 429     hExitingQueue = hQueue;
 430 }
 431
 432
 433 /***********************************************************************
 434  *           QUEUE_CreateMsgQueue
 435  *
 436  * Creates a message queue. Doesn't link it into queue list!
 437  */
 438 static HQUEUE16 QUEUE_CreateMsgQueue( BOOL16 bCreatePerQData )
 439 {
 440     HQUEUE16 hQueue;
 441     HANDLE handle;
 442     MESSAGEQUEUE * msgQueue;
 443
 444     TRACE_(msg)("(): Creating message queue...\n");
 445
 446     if (!(hQueue = GlobalAlloc16( GMEM_FIXED | GMEM_ZEROINIT,
 447                                   sizeof(MESSAGEQUEUE) )))
 448         return 0;
 449
 450     msgQueue = (MESSAGEQUEUE *) GlobalLock16( hQueue );
 451     if ( !msgQueue )
 452         return 0;
 453
 454     SERVER_START_REQ( get_msg_queue )
 455     {
 456         SERVER_CALL_ERR();
 457         handle = req->handle;
 458     }
 459     SERVER_END_REQ;
 460     if (!handle)
 461     {
 462         ERR_(msg)("Cannot get thread queue");
 463         GlobalFree16( hQueue );
 464         return 0;
 465     }
 466     msgQueue->server_queue = handle;
 467     msgQueue->server_queue = ConvertToGlobalHandle( msgQueue->server_queue );
 468
 469     msgQueue->self        = hQueue;
 470     msgQueue->wakeBits    = msgQueue->changeBits = 0;
 471
 472     InitializeCriticalSection( &msgQueue->cSection );
 473     MakeCriticalSectionGlobal( &msgQueue->cSection );
 474
 475     msgQueue->lockCount = 1;
 476     msgQueue->magic = QUEUE_MAGIC;
 477
 478     /* Create and initialize our per queue data */
 479     msgQueue->pQData = bCreatePerQData ? PERQDATA_CreateInstance() : NULL;
 480
 481     return hQueue;
 482 }
 483
 484
 485 /***********************************************************************
 486  *           QUEUE_FlushMessage
 487  *
 488  * Try to reply to all pending sent messages on exit.
 489  */
 490 static void QUEUE_FlushMessages( MESSAGEQUEUE *queue )
 491 {
 492     SMSG *smsg;
 493     MESSAGEQUEUE *senderQ = 0;
 494
 495     if( queue )
 496     {
 497         EnterCriticalSection( &queue->cSection );
 498
 499         /* empty the list of pending SendMessage waiting to be received */
 500         while (queue->smPending)
 501         {
 502             smsg = QUEUE_RemoveSMSG( queue, SM_PENDING_LIST, 0);
 503
 504             senderQ = QUEUE_Lock( smsg->hSrcQueue );
 505             if ( !senderQ )
 506                 continue;
 507
 508             /* return 0, to unblock other thread */
 509             smsg->lResult = 0;
 510             smsg->flags |= SMSG_HAVE_RESULT;
 511             QUEUE_SetWakeBit( senderQ, QS_SMRESULT);
 512
 513             QUEUE_Unlock( senderQ );
 514         }
 515
 516         QUEUE_ClearWakeBit( queue, QS_SENDMESSAGE );
 517
 518         LeaveCriticalSection( &queue->cSection );
 519     }
 520 }
 521
 522
 523 /***********************************************************************
 524  *           QUEUE_DeleteMsgQueue
 525  *
 526  * Unlinks and deletes a message queue.
 527  *
 528  * Note: We need to mask asynchronous events to make sure PostMessage works
 529  * even in the signal handler.
 530  */
 531 BOOL QUEUE_DeleteMsgQueue( HQUEUE16 hQueue )
 532 {
 533     MESSAGEQUEUE * msgQueue = QUEUE_Lock(hQueue);
 534     HQUEUE16 *pPrev;
 535
 536     TRACE_(msg)("(): Deleting message queue %04x\n", hQueue);
 537
 538     if (!hQueue || !msgQueue)
 539     {
 540         ERR_(msg)("invalid argument.\n");
 541         return 0;
 542     }
 543
 544     msgQueue->magic = 0;
 545
 546     if( hCursorQueue == hQueue ) hCursorQueue = 0;
 547     if( hActiveQueue == hQueue ) hActiveQueue = 0;
 548
 549     /* flush sent messages */
 550     QUEUE_FlushMessages( msgQueue );
 551
 552     HeapLock( GetProcessHeap() );  /* FIXME: a bit overkill */
 553
 554     /* Release per queue data if present */
 555     if ( msgQueue->pQData )
 556     {
 557         PERQDATA_Release( msgQueue->pQData );
 558         msgQueue->pQData = 0;
 559     }
 560
 561     /* remove the message queue from the global link list */
 562     pPrev = &hFirstQueue;
 563     while (*pPrev && (*pPrev != hQueue))
 564     {
 565         MESSAGEQUEUE *msgQ = (MESSAGEQUEUE*)GlobalLock16(*pPrev);
 566
 567         /* sanity check */
 568         if ( !msgQ || (msgQ->magic != QUEUE_MAGIC) )
 569         {
 570             /* HQUEUE link list is corrupted, try to exit gracefully */
 571             ERR_(msg)("HQUEUE link list corrupted!\n");
 572             pPrev = 0;
 573             break;
 574         }
 575         pPrev = &msgQ->next;
 576     }
 577     if (pPrev && *pPrev) *pPrev = msgQueue->next;
 578     msgQueue->self = 0;
 579
 580     HeapUnlock( GetProcessHeap() );
 581
 582     /* free up resource used by MESSAGEQUEUE structure */
 583     msgQueue->lockCount--;
 584     QUEUE_Unlock( msgQueue );
 585
 586     return 1;
 587 }
 588
 589
 590 /***********************************************************************
 591  *           QUEUE_CreateSysMsgQueue
 592  *
 593  * Create the system message queue, and set the double-click speed.
 594  * Must be called only once.
 595  */
 596 BOOL QUEUE_CreateSysMsgQueue( int size )
 597 {
 598     /* Note: We dont need perQ data for the system message queue */
 599     if (!(hmemSysMsgQueue = QUEUE_CreateMsgQueue( FALSE )))
 600         return FALSE;
 601
 602     sysMsgQueue = (MESSAGEQUEUE *) GlobalLock16( hmemSysMsgQueue );
 603     return TRUE;
 604 }
 605
 606
 607 /***********************************************************************
 608  *           QUEUE_GetSysQueue
 609  */
 610 MESSAGEQUEUE *QUEUE_GetSysQueue(void)
 611 {
 612     return sysMsgQueue;
 613 }
 614
 615
 616 /***********************************************************************
 617  *           QUEUE_SetWakeBit
 618  *
 619  * See "Windows Internals", p.449
 620  */
 621 static BOOL QUEUE_TrySetWakeBit( MESSAGEQUEUE *queue, WORD bit, BOOL always )
 622 {
 623     BOOL wake = FALSE;
 624
 625     EnterCriticalSection( &queue->cSection );
 626
 627     TRACE_(msg)("queue = %04x (wm=%04x), bit = %04x, always = %d\n",
 628                         queue->self, queue->wakeMask, bit, always );
 629
 630     if ((queue->wakeMask & bit) || always)
 631     {
 632         if (bit & QS_MOUSE) pMouseQueue = queue;
 633         if (bit & QS_KEY) pKbdQueue = queue;
 634         queue->changeBits |= bit;
 635         queue->wakeBits   |= bit;
 636     }
 637     if (queue->wakeMask & bit)
 638     {
 639         queue->wakeMask = 0;
 640         wake = TRUE;
 641     }
 642
 643     LeaveCriticalSection( &queue->cSection );
 644
 645     if ( wake )
 646     {
 647         /* Wake up thread waiting for message */
 648         SERVER_START_REQ( wake_queue )
 649         {
 650             req->handle = queue->server_queue;
 651             req->bits   = bit;
 652             SERVER_CALL();
 653         }
 654         SERVER_END_REQ;
 655     }
 656
 657     return wake;
 658 }
 659 void QUEUE_SetWakeBit( MESSAGEQUEUE *queue, WORD bit )
 660 {
 661     QUEUE_TrySetWakeBit( queue, bit, TRUE );
 662 }
 663
 664
 665 /***********************************************************************
 666  *           QUEUE_ClearWakeBit
 667  */
 668 void QUEUE_ClearWakeBit( MESSAGEQUEUE *queue, WORD bit )
 669 {
 670     EnterCriticalSection( &queue->cSection );
 671     queue->changeBits &= ~bit;
 672     queue->wakeBits   &= ~bit;
 673     LeaveCriticalSection( &queue->cSection );
 674 }
 675
 676 /***********************************************************************
 677  *           QUEUE_TestWakeBit
 678  */
 679 WORD QUEUE_TestWakeBit( MESSAGEQUEUE *queue, WORD bit )
 680 {
 681     WORD ret;
 682     EnterCriticalSection( &queue->cSection );
 683     ret = queue->wakeBits & bit;
 684     LeaveCriticalSection( &queue->cSection );
 685     return ret;
 686 }
 687
 688
 689 /***********************************************************************
 690  *           QUEUE_WaitBits
 691  *
 692  * See "Windows Internals", p.447
 693  *
 694  * return values:
 695  *    0 if exit with timeout
 696  *    1 otherwise
 697  */
 698 int QUEUE_WaitBits( WORD bits, DWORD timeout )
 699 {
 700     MESSAGEQUEUE *queue;
 701     HQUEUE16 hQueue;
 702
 703     TRACE_(msg)("q %04x waiting for %04x\n", GetFastQueue16(), bits);
 704
 705     hQueue = GetFastQueue16();
 706     if (!(queue = QUEUE_Lock( hQueue ))) return 0;
 707
 708     for (;;)
 709     {
 710         DWORD dwlc;
 711
 712         EnterCriticalSection( &queue->cSection );
 713
 714         if (queue->changeBits & bits)
 715         {
 716             /* One of the bits is set; we can return */
 717             queue->wakeMask = 0;
 718
 719             LeaveCriticalSection( &queue->cSection );
 720             QUEUE_Unlock( queue );
 721             return 1;
 722         }
 723         if (queue->wakeBits & QS_SENDMESSAGE)
 724         {
 725             /* Process the sent message immediately */
 726             queue->wakeMask = 0;
 727
 728             LeaveCriticalSection( &queue->cSection );
 729             QUEUE_ReceiveMessage( queue );
 730             continue;                           /* nested sm crux */
 731         }
 732
 733         queue->wakeMask = bits | QS_SENDMESSAGE;
 734         TRACE_(msg)("%04x) wakeMask is %04x, waiting\n", queue->self, queue->wakeMask);
 735         LeaveCriticalSection( &queue->cSection );
 736
 737         ReleaseThunkLock( &dwlc );
 738         if (dwlc) TRACE_(msg)("had win16 lock\n");
 739         WaitForSingleObject( queue->server_queue, timeout );
 740         if (dwlc) RestoreThunkLock( dwlc );
 741     }
 742 }
 743
 744
 745 /***********************************************************************
 746  *           QUEUE_AddSMSG
 747  *
 748  * This routine is called when a SMSG need to be added to one of the three
 749  * SM list.  (SM_PROCESSING_LIST, SM_PENDING_LIST, SM_WAITING_LIST)
 750  */
 751 BOOL QUEUE_AddSMSG( MESSAGEQUEUE *queue, int list, SMSG *smsg )
 752 {
 753     TRACE_(sendmsg)("queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
 754           smsg, SPY_GetMsgName(smsg->msg));
 755
 756     switch (list)
 757     {
 758         case SM_PROCESSING_LIST:
 759             /* don't need to be thread safe, only accessed by the
 760              thread associated with the sender queue */
 761             smsg->nextProcessing = queue->smProcessing;
 762             queue->smProcessing = smsg;
 763             break;
 764
 765         case SM_WAITING_LIST:
 766             /* don't need to be thread safe, only accessed by the
 767              thread associated with the receiver queue */
 768             smsg->nextWaiting = queue->smWaiting;
 769             queue->smWaiting = smsg;
 770             break;
 771
 772         case SM_PENDING_LIST:
 773         {
 774             /* make it thread safe, could be accessed by the sender and
 775              receiver thread */
 776             SMSG **prev;
 777
 778             EnterCriticalSection( &queue->cSection );
 779             smsg->nextPending = NULL;
 780             prev = &queue->smPending;
 781             while ( *prev )
 782                 prev = &(*prev)->nextPending;
 783             *prev = smsg;
 784             LeaveCriticalSection( &queue->cSection );
 785
 786             QUEUE_SetWakeBit( queue, QS_SENDMESSAGE );
 787             break;
 788         }
 789
 790         default:
 791             ERR_(sendmsg)("Invalid list: %d", list);
 792             break;
 793     }
 794
 795     return TRUE;
 796 }
 797
 798
 799 /***********************************************************************
 800  *           QUEUE_RemoveSMSG
 801  *
 802  * This routine is called when a SMSG needs to be removed from one of the three
 803  * SM lists (SM_PROCESSING_LIST, SM_PENDING_LIST, SM_WAITING_LIST).
 804  * If smsg == 0, remove the first smsg from the specified list
 805  */
 806 SMSG *QUEUE_RemoveSMSG( MESSAGEQUEUE *queue, int list, SMSG *smsg )
 807 {
 808
 809     switch (list)
 810     {
 811         case SM_PROCESSING_LIST:
 812             /* don't need to be thread safe, only accessed by the
 813              thread associated with the sender queue */
 814
 815             /* if smsg is equal to null, it means the first in the list */
 816             if (!smsg)
 817                 smsg = queue->smProcessing;
 818
 819             TRACE_(sendmsg)("queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
 820                   smsg, SPY_GetMsgName(smsg->msg));
 821             /* In fact SM_PROCESSING_LIST is a stack, and smsg
 822              should be always at the top of the list */
 823             if ( (smsg != queue->smProcessing) || !queue->smProcessing )
 824             {
 825                 ERR_(sendmsg)("smsg not at the top of Processing list, smsg=0x%p queue=0x%p\n", smsg, queue);
 826                 return 0;
 827             }
 828             else
 829             {
 830                 queue->smProcessing = smsg->nextProcessing;
 831                 smsg->nextProcessing = 0;
 832             }
 833             return smsg;
 834
 835         case SM_WAITING_LIST:
 836             /* don't need to be thread safe, only accessed by the
 837              thread associated with the receiver queue */
 838
 839             /* if smsg is equal to null, it means the first in the list */
 840             if (!smsg)
 841                 smsg = queue->smWaiting;
 842
 843             TRACE_(sendmsg)("queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
 844                   smsg, SPY_GetMsgName(smsg->msg));
 845             /* In fact SM_WAITING_LIST is a stack, and smsg
 846              should be always at the top of the list */
 847             if ( (smsg != queue->smWaiting) || !queue->smWaiting )
 848             {
 849                 ERR_(sendmsg)("smsg not at the top of Waiting list, smsg=0x%p queue=0x%p\n", smsg, queue);
 850                 return 0;
 851             }
 852             else
 853             {
 854                 queue->smWaiting = smsg->nextWaiting;
 855                 smsg->nextWaiting = 0;
 856             }
 857             return smsg;
 858
 859         case SM_PENDING_LIST:
 860             /* make it thread safe, could be accessed by the sender and
 861              receiver thread */
 862             EnterCriticalSection( &queue->cSection );
 863
 864             if (!smsg)
 865                 smsg = queue->smPending;
 866             if ( (smsg != queue->smPending) || !queue->smPending )
 867             {
 868                 ERR_(sendmsg)("should always remove the top one in Pending list, smsg=0x%p queue=0x%p\n", smsg, queue);
 869                 LeaveCriticalSection( &queue->cSection );
 870                 return 0;
 871             }
 872
 873             TRACE_(sendmsg)("queue=%x, list=%d, smsg=%p msg=%s\n", queue->self, list,
 874                   smsg, SPY_GetMsgName(smsg->msg));
 875
 876             queue->smPending = smsg->nextPending;
 877             smsg->nextPending = 0;
 878
 879             /* if no more SMSG in Pending list, clear QS_SENDMESSAGE flag */
 880             if (!queue->smPending)
 881                 QUEUE_ClearWakeBit( queue, QS_SENDMESSAGE );
 882
 883             LeaveCriticalSection( &queue->cSection );
 884             return smsg;
 885
 886         default:
 887             ERR_(sendmsg)("Invalid list: %d\n", list);
 888             break;
 889     }
 890
 891     return 0;
 892 }
 893
 894
 895 /***********************************************************************
 896  *           QUEUE_ReceiveMessage
 897  *
 898  * This routine is called to check whether a sent message is waiting
 899  * for the queue.  If so, it is received and processed.
 900  */
 901 BOOL QUEUE_ReceiveMessage( MESSAGEQUEUE *queue )
 902 {
 903     LRESULT       result = 0;
 904     SMSG          *smsg;
 905     MESSAGEQUEUE  *senderQ;
 906
 907     EnterCriticalSection( &queue->cSection );
 908     if ( !((queue->wakeBits & QS_SENDMESSAGE) && queue->smPending) )
 909     {
 910         LeaveCriticalSection( &queue->cSection );
 911         return FALSE;
 912     }
 913     LeaveCriticalSection( &queue->cSection );
 914
 915     TRACE_(sendmsg)("queue %04x\n", queue->self );
 916
 917     /* remove smsg on the top of the pending list and put it in the processing list */
 918     smsg = QUEUE_RemoveSMSG(queue, SM_PENDING_LIST, 0);
 919     QUEUE_AddSMSG(queue, SM_WAITING_LIST, smsg);
 920
 921     TRACE_(sendmsg)("RM: %s [%04x] (%04x -> %04x)\n",
 922             SPY_GetMsgName(smsg->msg), smsg->msg, smsg->hSrcQueue, smsg->hDstQueue );
 923
 924     if (IsWindow( smsg->hWnd ))
 925     {
 926         WND *wndPtr = WIN_FindWndPtr( smsg->hWnd );
 927         DWORD extraInfo = queue->GetMessageExtraInfoVal; /* save ExtraInfo */
 928
 929         /* use sender queue extra info value while calling the window proc */
 930         senderQ = QUEUE_Lock( smsg->hSrcQueue );
 931         if (senderQ)
 932         {
 933             queue->GetMessageExtraInfoVal = senderQ->GetMessageExtraInfoVal;
 934             QUEUE_Unlock( senderQ );
 935         }
 936
 937         /* call the right version of CallWindowProcXX */
 938         if (smsg->flags & SMSG_WIN32)
 939         {
 940             TRACE_(sendmsg)("\trcm: msg is Win32\n" );
 941             if (smsg->flags & SMSG_UNICODE)
 942                 result = CallWindowProcW( wndPtr->winproc,
 943                                             smsg->hWnd, smsg->msg,
 944                                             smsg->wParam, smsg->lParam );
 945             else
 946                 result = CallWindowProcA( wndPtr->winproc,
 947                                             smsg->hWnd, smsg->msg,
 948                                             smsg->wParam, smsg->lParam );
 949         }
 950         else  /* Win16 message */
 951             result = CallWindowProc16( (WNDPROC16)wndPtr->winproc,
 952                                        (HWND16) smsg->hWnd,
 953                                        (UINT16) smsg->msg,
 954                                        LOWORD (smsg->wParam),
 955                                        smsg->lParam );
 956
 957         queue->GetMessageExtraInfoVal = extraInfo;  /* Restore extra info */
 958         WIN_ReleaseWndPtr(wndPtr);
 959         TRACE_(sendmsg)("result =  %08x\n", (unsigned)result );
 960     }
 961     else WARN_(sendmsg)("\trcm: bad hWnd\n");
 962
 963
 964     /* set SMSG_SENDING_REPLY flag to tell ReplyMessage16, it's not
 965        an early reply */
 966     smsg->flags |= SMSG_SENDING_REPLY;
 967     ReplyMessage( result );
 968
 969     TRACE_(sendmsg)("done!\n" );
 970     return TRUE;
 971 }
 972
 973
 974
 975 /***********************************************************************
 976  *           QUEUE_AddMsg
 977  *
 978  * Add a message to the queue. Return FALSE if queue is full.
 979  */
 980 BOOL QUEUE_AddMsg( HQUEUE16 hQueue, int type, MSG *msg, DWORD extraInfo )
 981 {
 982     MESSAGEQUEUE *msgQueue;
 983     QMSG         *qmsg;
 984
 985
 986     if (!(msgQueue = QUEUE_Lock( hQueue ))) return FALSE;
 987
 988     /* allocate new message in global heap for now */
 989     if (!(qmsg = (QMSG *) HeapAlloc( GetProcessHeap(), 0, sizeof(QMSG) ) ))
 990     {
 991         QUEUE_Unlock( msgQueue );
 992         return 0;
 993     }
 994
 995     EnterCriticalSection( &msgQueue->cSection );
 996
 997       /* Store message */
 998     qmsg->type = type;
 999     qmsg->msg = *msg;
1000     qmsg->extraInfo = extraInfo;
1001
1002     /* insert the message in the link list */
1003     qmsg->nextMsg = 0;
1004     qmsg->prevMsg = msgQueue->lastMsg;
1005
1006     if (msgQueue->lastMsg)
1007         msgQueue->lastMsg->nextMsg = qmsg;
1008
1009     /* update first and last anchor in message queue */
1010     msgQueue->lastMsg = qmsg;
1011     if (!msgQueue->firstMsg)
1012         msgQueue->firstMsg = qmsg;
1013
1014     msgQueue->msgCount++;
1015
1016     LeaveCriticalSection( &msgQueue->cSection );
1017
1018     QUEUE_SetWakeBit( msgQueue, QS_POSTMESSAGE );
1019     QUEUE_Unlock( msgQueue );
1020
1021     return TRUE;
1022 }
1023
1024
1025
1026 /***********************************************************************
1027  *           QUEUE_FindMsg
1028  *
1029  * Find a message matching the given parameters. Return -1 if none available.
1030  */
1031 QMSG* QUEUE_FindMsg( MESSAGEQUEUE * msgQueue, HWND hwnd, int first, int last )
1032 {
1033     QMSG* qmsg;
1034
1035     EnterCriticalSection( &msgQueue->cSection );
1036
1037     if (!msgQueue->msgCount)
1038         qmsg = 0;
1039     else if (!hwnd && !first && !last)
1040         qmsg = msgQueue->firstMsg;
1041     else
1042     {
1043         /* look in linked list for message matching first and last criteria */
1044         for (qmsg = msgQueue->firstMsg; qmsg; qmsg = qmsg->nextMsg)
1045         {
1046             MSG *msg = &(qmsg->msg);
1047
1048             if (!hwnd || (msg->hwnd == hwnd))
1049             {
1050                 if (!first && !last)
1051                     break;   /* found it */
1052
1053                 if ((msg->message >= first) && (!last || (msg->message <= last)))
1054                     break;   /* found it */
1055             }
1056         }
1057     }
1058
1059     LeaveCriticalSection( &msgQueue->cSection );
1060
1061     return qmsg;
1062 }
1063
1064
1065
1066 /***********************************************************************
1067  *           QUEUE_RemoveMsg
1068  *
1069  * Remove a message from the queue (pos must be a valid position).
1070  */
1071 void QUEUE_RemoveMsg( MESSAGEQUEUE * msgQueue, QMSG *qmsg )
1072 {
1073     EnterCriticalSection( &msgQueue->cSection );
1074
1075     /* set the linked list */
1076     if (qmsg->prevMsg)
1077         qmsg->prevMsg->nextMsg = qmsg->nextMsg;
1078
1079     if (qmsg->nextMsg)
1080         qmsg->nextMsg->prevMsg = qmsg->prevMsg;
1081
1082     if (msgQueue->firstMsg == qmsg)
1083         msgQueue->firstMsg = qmsg->nextMsg;
1084
1085     if (msgQueue->lastMsg == qmsg)
1086         msgQueue->lastMsg = qmsg->prevMsg;
1087
1088     /* deallocate the memory for the message */
1089     HeapFree( GetProcessHeap(), 0, qmsg );
1090
1091     msgQueue->msgCount--;
1092     if (!msgQueue->msgCount) msgQueue->wakeBits &= ~QS_POSTMESSAGE;
1093
1094     LeaveCriticalSection( &msgQueue->cSection );
1095 }
1096
1097
1098 /***********************************************************************
1099  *           QUEUE_WakeSomeone
1100  *
1101  * Wake a queue upon reception of a hardware event.
1102  */
1103 static void QUEUE_WakeSomeone( UINT message )
1104 {
1105     WND*          wndPtr = NULL;
1106     WORD          wakeBit;
1107     HWND hwnd;
1108     HQUEUE16     hQueue = 0;
1109     MESSAGEQUEUE *queue = NULL;
1110
1111     if (hCursorQueue)
1112         hQueue = hCursorQueue;
1113
1114     if( (message >= WM_KEYFIRST) && (message <= WM_KEYLAST) )
1115     {
1116        wakeBit = QS_KEY;
1117        if( hActiveQueue )
1118            hQueue = hActiveQueue;
1119     }
1120     else
1121     {
1122        wakeBit = (message == WM_MOUSEMOVE) ? QS_MOUSEMOVE : QS_MOUSEBUTTON;
1123        if( (hwnd = GetCapture()) )
1124          if( (wndPtr = WIN_FindWndPtr( hwnd )) )
1125            {
1126                hQueue = wndPtr->hmemTaskQ;
1127                WIN_ReleaseWndPtr(wndPtr);
1128            }
1129     }
1130
1131     if( (hwnd = GetSysModalWindow16()) )
1132     {
1133       if( (wndPtr = WIN_FindWndPtr( hwnd )) )
1134         {
1135             hQueue = wndPtr->hmemTaskQ;
1136             WIN_ReleaseWndPtr(wndPtr);
1137         }
1138     }
1139
1140     if (hQueue)
1141     {
1142         queue = QUEUE_Lock( hQueue );
1143         QUEUE_SetWakeBit( queue, wakeBit );
1144         QUEUE_Unlock( queue );
1145         return;
1146     }
1147
1148     /* Search for someone to wake */
1149     hQueue = hFirstQueue;
1150     while ( (queue = QUEUE_Lock( hQueue )) )
1151     {
1152         if (QUEUE_TrySetWakeBit( queue, wakeBit, FALSE ))
1153         {
1154             QUEUE_Unlock( queue );
1155             return;
1156         }
1157
1158         hQueue = queue->next;
1159         QUEUE_Unlock( queue );
1160     }
1161
1162     WARN_(msg)("couldn't find queue\n");
1163 }
1164
1165
1166 /***********************************************************************
1167  *           hardware_event
1168  *
1169  * Add an event to the system message queue.
1170  * Note: the position is relative to the desktop window.
1171  */
1172 void hardware_event( UINT message, WPARAM wParam, LPARAM lParam,
1173                      int xPos, int yPos, DWORD time, DWORD extraInfo )
1174 {
1175     MSG *msg;
1176     QMSG  *qmsg;
1177     int  mergeMsg = 0;
1178
1179     if (!sysMsgQueue) return;
1180
1181     EnterCriticalSection( &sysMsgQueue->cSection );
1182
1183     /* Merge with previous event if possible */
1184     qmsg = sysMsgQueue->lastMsg;
1185
1186     if ((message == WM_MOUSEMOVE) && sysMsgQueue->lastMsg)
1187     {
1188         msg = &(sysMsgQueue->lastMsg->msg);
1189
1190         if ((msg->message == message) && (msg->wParam == wParam))
1191         {
1192             /* Merge events */
1193             qmsg = sysMsgQueue->lastMsg;
1194             mergeMsg = 1;
1195         }
1196     }
1197
1198     if (!mergeMsg)
1199     {
1200         /* Should I limit the number of messages in
1201           the system message queue??? */
1202
1203         /* Don't merge allocate a new msg in the global heap */
1204
1205         if (!(qmsg = (QMSG *) HeapAlloc( GetProcessHeap(), 0, sizeof(QMSG) ) ))
1206         {
1207             LeaveCriticalSection( &sysMsgQueue->cSection );
1208             return;
1209         }
1210
1211         /* put message at the end of the linked list */
1212         qmsg->nextMsg = 0;
1213         qmsg->prevMsg = sysMsgQueue->lastMsg;
1214
1215         if (sysMsgQueue->lastMsg)
1216             sysMsgQueue->lastMsg->nextMsg = qmsg;
1217
1218         /* set last and first anchor index in system message queue */
1219         sysMsgQueue->lastMsg = qmsg;
1220         if (!sysMsgQueue->firstMsg)
1221             sysMsgQueue->firstMsg = qmsg;
1222
1223         sysMsgQueue->msgCount++;
1224     }
1225
1226       /* Store message */
1227     msg = &(qmsg->msg);
1228     msg->hwnd    = 0;
1229     msg->message = message;
1230     msg->wParam  = wParam;
1231     msg->lParam  = lParam;
1232     msg->time    = time;
1233     msg->pt.x    = xPos;
1234     msg->pt.y    = yPos;
1235     qmsg->extraInfo = extraInfo;
1236     qmsg->type      = QMSG_HARDWARE;
1237
1238     LeaveCriticalSection( &sysMsgQueue->cSection );
1239
1240     QUEUE_WakeSomeone( message );
1241 }
1242
1243
1244 /***********************************************************************
1245  *           QUEUE_GetQueueTask
1246  */
1247 HTASK16 QUEUE_GetQueueTask( HQUEUE16 hQueue )
1248 {
1249     HTASK16 hTask = 0;
1250
1251     MESSAGEQUEUE *queue = QUEUE_Lock( hQueue );
1252
1253     if (queue)
1254     {
1255         hTask = queue->teb->htask16;
1256         QUEUE_Unlock( queue );
1257     }
1258
1259     return hTask;
1260 }
1261
1262
1263
1264 /***********************************************************************
1265  *           QUEUE_IncPaintCount
1266  */
1267 void QUEUE_IncPaintCount( HQUEUE16 hQueue )
1268 {
1269     MESSAGEQUEUE *queue;
1270
1271     if (!(queue = QUEUE_Lock( hQueue ))) return;
1272     EnterCriticalSection( &queue->cSection );
1273     queue->wPaintCount++;
1274     LeaveCriticalSection( &queue->cSection );
1275     QUEUE_SetWakeBit( queue, QS_PAINT );
1276     QUEUE_Unlock( queue );
1277 }
1278
1279
1280 /***********************************************************************
1281  *           QUEUE_DecPaintCount
1282  */
1283 void QUEUE_DecPaintCount( HQUEUE16 hQueue )
1284 {
1285     MESSAGEQUEUE *queue;
1286
1287     if (!(queue = QUEUE_Lock( hQueue ))) return;
1288     EnterCriticalSection( &queue->cSection );
1289     queue->wPaintCount--;
1290     if (!queue->wPaintCount) queue->wakeBits &= ~QS_PAINT;
1291     LeaveCriticalSection( &queue->cSection );
1292     QUEUE_Unlock( queue );
1293 }
1294
1295
1296 /***********************************************************************
1297  *           QUEUE_IncTimerCount
1298  */
1299 void QUEUE_IncTimerCount( HQUEUE16 hQueue )
1300 {
1301     MESSAGEQUEUE *queue;
1302
1303     if (!(queue = QUEUE_Lock( hQueue ))) return;
1304     EnterCriticalSection( &queue->cSection );
1305     queue->wTimerCount++;
1306     LeaveCriticalSection( &queue->cSection );
1307     QUEUE_SetWakeBit( queue, QS_TIMER );
1308     QUEUE_Unlock( queue );
1309 }
1310
1311
1312 /***********************************************************************
1313  *           QUEUE_DecTimerCount
1314  */
1315 void QUEUE_DecTimerCount( HQUEUE16 hQueue )
1316 {
1317     MESSAGEQUEUE *queue;
1318
1319     if (!(queue = QUEUE_Lock( hQueue ))) return;
1320     EnterCriticalSection( &queue->cSection );
1321     queue->wTimerCount--;
1322     if (!queue->wTimerCount) queue->wakeBits &= ~QS_TIMER;
1323     LeaveCriticalSection( &queue->cSection );
1324     QUEUE_Unlock( queue );
1325 }
1326
1327
1328 /***********************************************************************
1329  *              PostQuitMessage (USER.6)
1330  */
1331 void WINAPI PostQuitMessage16( INT16 exitCode )
1332 {
1333     PostQuitMessage( exitCode );
1334 }
1335
1336
1337 /***********************************************************************
1338  *              PostQuitMessage (USER32.@)
1339  *
1340  * PostQuitMessage() posts a message to the system requesting an
1341  * application to terminate execution. As a result of this function,
1342  * the WM_QUIT message is posted to the application, and
1343  * PostQuitMessage() returns immediately.  The exitCode parameter
1344  * specifies an application-defined exit code, which appears in the
1345  * _wParam_ parameter of the WM_QUIT message posted to the application.
1346  *
1347  * CONFORMANCE
1348  *
1349  *  ECMA-234, Win32
1350  */
1351 void WINAPI PostQuitMessage( INT exitCode )
1352 {
1353     MESSAGEQUEUE *queue;
1354
1355     if (!(queue = QUEUE_Lock( GetFastQueue16() ))) return;
1356     EnterCriticalSection( &queue->cSection );
1357     queue->wPostQMsg = TRUE;
1358     queue->wExitCode = (WORD)exitCode;
1359     LeaveCriticalSection( &queue->cSection );
1360     QUEUE_Unlock( queue );
1361 }
1362
1363
1364 /***********************************************************************
1365  *              GetWindowTask (USER.224)
1366  */
1367 HTASK16 WINAPI GetWindowTask16( HWND16 hwnd )
1368 {
1369     HTASK16 retvalue;
1370     WND *wndPtr = WIN_FindWndPtr( hwnd );
1371
1372     if (!wndPtr) return 0;
1373     retvalue = QUEUE_GetQueueTask( wndPtr->hmemTaskQ );
1374     WIN_ReleaseWndPtr(wndPtr);
1375     return retvalue;
1376 }
1377
1378 /***********************************************************************
1379  *              GetWindowThreadProcessId (USER32.@)
1380  */
1381 DWORD WINAPI GetWindowThreadProcessId( HWND hwnd, LPDWORD process )
1382 {
1383     DWORD retvalue;
1384     MESSAGEQUEUE *queue;
1385
1386     WND *wndPtr = WIN_FindWndPtr( hwnd );
1387     if (!wndPtr) return 0;
1388
1389     queue = QUEUE_Lock( wndPtr->hmemTaskQ );
1390     WIN_ReleaseWndPtr(wndPtr);
1391
1392     if (!queue) return 0;
1393
1394     if ( process ) *process = (DWORD)queue->teb->pid;
1395     retvalue = (DWORD)queue->teb->tid;
1396
1397     QUEUE_Unlock( queue );
1398     return retvalue;
1399 }
1400
1401
1402 /***********************************************************************
1403  *              SetMessageQueue (USER.266)
1404  */
1405 BOOL16 WINAPI SetMessageQueue16( INT16 size )
1406 {
1407     return SetMessageQueue( size );
1408 }
1409
1410
1411 /***********************************************************************
1412  *              SetMessageQueue (USER32.@)
1413  */
1414 BOOL WINAPI SetMessageQueue( INT size )
1415 {
1416     /* now obsolete the message queue will be expanded dynamically
1417      as necessary */
1418
1419     /* access the queue to create it if it's not existing */
1420     GetFastQueue16();
1421
1422     return TRUE;
1423 }
1424
1425 /***********************************************************************
1426  *              InitThreadInput (USER.409)
1427  */
1428 HQUEUE16 WINAPI InitThreadInput16( WORD unknown, WORD flags )
1429 {
1430     HQUEUE16 hQueue;
1431     MESSAGEQUEUE *queuePtr;
1432
1433     TEB *teb = NtCurrentTeb();
1434
1435     if (!teb)
1436         return 0;
1437
1438     hQueue = teb->queue;
1439
1440     if ( !hQueue )
1441     {
1442         /* Create thread message queue */
1443         if( !(hQueue = QUEUE_CreateMsgQueue( TRUE )))
1444         {
1445             ERR_(msg)("failed!\n");
1446             return FALSE;
1447         }
1448
1449         /* Link new queue into list */
1450         queuePtr = QUEUE_Lock( hQueue );
1451         queuePtr->teb = NtCurrentTeb();
1452
1453         HeapLock( GetProcessHeap() );  /* FIXME: a bit overkill */
1454         SetThreadQueue16( 0, hQueue );
1455         teb->queue = hQueue;
1456
1457         queuePtr->next  = hFirstQueue;
1458         hFirstQueue = hQueue;
1459         HeapUnlock( GetProcessHeap() );
1460
1461         QUEUE_Unlock( queuePtr );
1462     }
1463
1464     return hQueue;
1465 }
1466
1467 /***********************************************************************
1468  *              GetQueueStatus (USER.334)
1469  */
1470 DWORD WINAPI GetQueueStatus16( UINT16 flags )
1471 {
1472     MESSAGEQUEUE *queue;
1473     DWORD ret;
1474
1475     if (!(queue = QUEUE_Lock( GetFastQueue16() ))) return 0;
1476     EnterCriticalSection( &queue->cSection );
1477     ret = MAKELONG( queue->changeBits, queue->wakeBits );
1478     queue->changeBits = 0;
1479     LeaveCriticalSection( &queue->cSection );
1480     QUEUE_Unlock( queue );
1481
1482     return ret & MAKELONG( flags, flags );
1483 }
1484
1485 /***********************************************************************
1486  *              GetQueueStatus (USER32.@)
1487  */
1488 DWORD WINAPI GetQueueStatus( UINT flags )
1489 {
1490     MESSAGEQUEUE *queue;
1491     DWORD ret;
1492
1493     if (!(queue = QUEUE_Lock( GetFastQueue16() ))) return 0;
1494     EnterCriticalSection( &queue->cSection );
1495     ret = MAKELONG( queue->changeBits, queue->wakeBits );
1496     queue->changeBits = 0;
1497     LeaveCriticalSection( &queue->cSection );
1498     QUEUE_Unlock( queue );
1499
1500     return ret & MAKELONG( flags, flags );
1501 }
1502
1503
1504 /***********************************************************************
1505  *              GetInputState (USER.335)
1506  */
1507 BOOL16 WINAPI GetInputState16(void)
1508 {
1509     return GetInputState();
1510 }
1511
1512 /***********************************************************************
1513  *              WaitForInputIdle (USER32.@)
1514  */
1515 DWORD WINAPI WaitForInputIdle (HANDLE hProcess, DWORD dwTimeOut)
1516 {
1517     DWORD cur_time, ret;
1518     HANDLE idle_event = -1;
1519
1520     SERVER_START_REQ( wait_input_idle )
1521     {
1522         req->handle = hProcess;
1523         req->timeout = dwTimeOut;
1524         if (!(ret = SERVER_CALL_ERR())) idle_event = req->event;
1525     }
1526     SERVER_END_REQ;
1527     if (ret) return 0xffffffff;  /* error */
1528     if (!idle_event) return 0;  /* no event to wait on */
1529
1530     cur_time = GetTickCount();
1531
1532     TRACE_(msg)("waiting for %x\n", idle_event );
1533     while ( dwTimeOut > GetTickCount() - cur_time || dwTimeOut == INFINITE )
1534     {
1535         ret = MsgWaitForMultipleObjects ( 1, &idle_event, FALSE, dwTimeOut, QS_SENDMESSAGE );
1536         if ( ret == ( WAIT_OBJECT_0 + 1 ))
1537         {
1538             MESSAGEQUEUE * queue;
1539             if (!(queue = QUEUE_Lock( GetFastQueue16() ))) return 0xFFFFFFFF;
1540             QUEUE_ReceiveMessage ( queue );
1541             QUEUE_Unlock ( queue );
1542             continue;
1543         }
1544         if ( ret == WAIT_TIMEOUT || ret == 0xFFFFFFFF )
1545         {
1546             TRACE_(msg)("timeout or error\n");
1547             return ret;
1548         }
1549         else
1550         {
1551             TRACE_(msg)("finished\n");
1552             return 0;
1553         }
1554     }
1555
1556     return WAIT_TIMEOUT;
1557 }
1558
1559 /***********************************************************************
1560  *              GetInputState (USER32.@)
1561  */
1562 BOOL WINAPI GetInputState(void)
1563 {
1564     MESSAGEQUEUE *queue;
1565     BOOL ret;
1566
1567     if (!(queue = QUEUE_Lock( GetFastQueue16() )))
1568         return FALSE;
1569     EnterCriticalSection( &queue->cSection );
1570     ret = queue->wakeBits & (QS_KEY | QS_MOUSEBUTTON);
1571     LeaveCriticalSection( &queue->cSection );
1572     QUEUE_Unlock( queue );
1573
1574     return ret;
1575 }
1576
1577 /***********************************************************************
1578  *              UserYield (USER.332)
1579  *              UserYield16 (USER32.@)
1580  */
1581 void WINAPI UserYield16(void)
1582 {
1583     MESSAGEQUEUE *queue;
1584
1585     /* Handle sent messages */
1586     queue = QUEUE_Lock( GetFastQueue16() );
1587
1588     while ( queue && QUEUE_ReceiveMessage( queue ) )
1589         ;
1590
1591     QUEUE_Unlock( queue );
1592
1593     /* Yield */
1594     OldYield16();
1595
1596     /* Handle sent messages again */
1597     queue = QUEUE_Lock( GetFastQueue16() );
1598
1599     while ( queue && QUEUE_ReceiveMessage( queue ) )
1600         ;
1601
1602     QUEUE_Unlock( queue );
1603 }
1604
1605 /***********************************************************************
1606  *              GetMessagePos (USER.119) (USER32.@)
1607  *
1608  * The GetMessagePos() function returns a long value representing a
1609  * cursor position, in screen coordinates, when the last message
1610  * retrieved by the GetMessage() function occurs. The x-coordinate is
1611  * in the low-order word of the return value, the y-coordinate is in
1612  * the high-order word. The application can use the MAKEPOINT()
1613  * macro to obtain a POINT structure from the return value.
1614  *
1615  * For the current cursor position, use GetCursorPos().
1616  *
1617  * RETURNS
1618  *
1619  * Cursor position of last message on success, zero on failure.
1620  *
1621  * CONFORMANCE
1622  *
1623  * ECMA-234, Win32
1624  *
1625  */
1626 DWORD WINAPI GetMessagePos(void)
1627 {
1628     MESSAGEQUEUE *queue;
1629     DWORD ret;
1630
1631     if (!(queue = QUEUE_Lock( GetFastQueue16() ))) return 0;
1632     ret = queue->GetMessagePosVal;
1633     QUEUE_Unlock( queue );
1634
1635     return ret;
1636 }
1637
1638
1639 /***********************************************************************
1640  *              GetMessageTime (USER.120) (USER32.@)
1641  *
1642  * GetMessageTime() returns the message time for the last message
1643  * retrieved by the function. The time is measured in milliseconds with
1644  * the same offset as GetTickCount().
1645  *
1646  * Since the tick count wraps, this is only useful for moderately short
1647  * relative time comparisons.
1648  *
1649  * RETURNS
1650  *
1651  * Time of last message on success, zero on failure.
1652  *
1653  * CONFORMANCE
1654  *
1655  * ECMA-234, Win32
1656  *
1657  */
1658 LONG WINAPI GetMessageTime(void)
1659 {
1660     MESSAGEQUEUE *queue;
1661     LONG ret;
1662
1663     if (!(queue = QUEUE_Lock( GetFastQueue16() ))) return 0;
1664     ret = queue->GetMessageTimeVal;
1665     QUEUE_Unlock( queue );
1666
1667     return ret;
1668 }
1669
1670
1671 /***********************************************************************
1672  *              GetMessageExtraInfo (USER.288) (USER32.@)
1673  */
1674 LONG WINAPI GetMessageExtraInfo(void)
1675 {
1676     MESSAGEQUEUE *queue;
1677     LONG ret;
1678
1679     if (!(queue = QUEUE_Lock( GetFastQueue16() ))) return 0;
1680     ret = queue->GetMessageExtraInfoVal;
1681     QUEUE_Unlock( queue );
1682
1683     return ret;
1684 }
1685
1686
1687 /**********************************************************************
1688  *              AttachThreadInput (USER32.@) Attaches input of 1 thread to other
1689  *
1690  * Attaches the input processing mechanism of one thread to that of
1691  * another thread.
1692  *
1693  * RETURNS
1694  *    Success: TRUE
1695  *    Failure: FALSE
1696  *
1697  * TODO:
1698  *    1. Reset the Key State (currenly per thread key state is not maintained)
1699  */
1700 BOOL WINAPI AttachThreadInput(
1701     DWORD idAttach,   /* [in] Thread to attach */
1702     DWORD idAttachTo, /* [in] Thread to attach to */
1703     BOOL fAttach)   /* [in] Attach or detach */
1704 {
1705     MESSAGEQUEUE *pSrcMsgQ = 0, *pTgtMsgQ = 0;
1706     BOOL16 bRet = 0;
1707
1708     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
1709
1710     /* A thread cannot attach to itself */
1711     if ( idAttach == idAttachTo )
1712         goto CLEANUP;
1713
1714     /* According to the docs this method should fail if a
1715      * "Journal record" hook is installed. (attaches all input queues together)
1716      */
1717     if ( HOOK_IsHooked( WH_JOURNALRECORD ) )
1718         goto CLEANUP;
1719
1720     /* Retrieve message queues corresponding to the thread id's */
1721     pTgtMsgQ = QUEUE_Lock( GetThreadQueue16( idAttach ) );
1722     pSrcMsgQ = QUEUE_Lock( GetThreadQueue16( idAttachTo ) );
1723
1724     /* Ensure we have message queues and that Src and Tgt threads
1725      * are not system threads.
1726      */
1727     if ( !pSrcMsgQ || !pTgtMsgQ || !pSrcMsgQ->pQData || !pTgtMsgQ->pQData )
1728         goto CLEANUP;
1729
1730     if (fAttach)   /* Attach threads */
1731     {
1732         /* Only attach if currently detached  */
1733         if ( pTgtMsgQ->pQData != pSrcMsgQ->pQData )
1734         {
1735             /* First release the target threads perQData */
1736             PERQDATA_Release( pTgtMsgQ->pQData );
1737
1738             /* Share a reference to the source threads perQDATA */
1739             PERQDATA_Addref( pSrcMsgQ->pQData );
1740             pTgtMsgQ->pQData = pSrcMsgQ->pQData;
1741         }
1742     }
1743     else    /* Detach threads */
1744     {
1745         /* Only detach if currently attached */
1746         if ( pTgtMsgQ->pQData == pSrcMsgQ->pQData )
1747         {
1748             /* First release the target threads perQData */
1749             PERQDATA_Release( pTgtMsgQ->pQData );
1750
1751             /* Give the target thread its own private perQDATA once more */
1752             pTgtMsgQ->pQData = PERQDATA_CreateInstance();
1753         }
1754     }
1755
1756     /* TODO: Reset the Key State */
1757
1758     bRet = 1;      /* Success */
1759
1760 CLEANUP:
1761
1762     /* Unlock the queues before returning */
1763     if ( pSrcMsgQ )
1764         QUEUE_Unlock( pSrcMsgQ );
1765     if ( pTgtMsgQ )
1766         QUEUE_Unlock( pTgtMsgQ );
1767
1768     return bRet;
1769 }