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682 lines
18 KiB
C
682 lines
18 KiB
C
/*
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* Message queues related functions
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*
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* Copyright 1993, 1994 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <string.h>
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#include <signal.h>
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#include <assert.h>
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#include "windef.h"
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#include "wingdi.h"
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#include "winerror.h"
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#include "wine/winbase16.h"
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#include "wine/winuser16.h"
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#include "queue.h"
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#include "win.h"
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#include "user.h"
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#include "hook.h"
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#include "thread.h"
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#include "wine/debug.h"
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#include "wine/server.h"
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#include "spy.h"
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WINE_DEFAULT_DEBUG_CHANNEL(msg);
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static PERQUEUEDATA *pQDataWin16 = NULL; /* Global perQData for Win16 tasks */
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HQUEUE16 hActiveQueue = 0;
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/***********************************************************************
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* PERQDATA_Addref
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*
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* Increment reference count for the PERQUEUEDATA instance
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* Returns reference count for debugging purposes
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*/
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static void PERQDATA_Addref( PERQUEUEDATA *pQData )
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{
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assert(pQData != 0 );
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TRACE_(msg)("(): current refcount %lu ...\n", pQData->ulRefCount);
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InterlockedIncrement( &pQData->ulRefCount );
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}
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/***********************************************************************
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* PERQDATA_Release
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*
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* Release a reference to a PERQUEUEDATA instance.
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* Destroy the instance if no more references exist
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* Returns reference count for debugging purposes
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*/
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static void PERQDATA_Release( PERQUEUEDATA *pQData )
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{
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assert(pQData != 0 );
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TRACE_(msg)("(): current refcount %lu ...\n",
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(LONG)pQData->ulRefCount );
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if (!InterlockedDecrement( &pQData->ulRefCount ))
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{
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DeleteCriticalSection( &pQData->cSection );
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TRACE_(msg)("(): deleting PERQUEUEDATA instance ...\n" );
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/* Deleting our global 16 bit perQData? */
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if ( pQData == pQDataWin16 ) pQDataWin16 = 0;
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/* Free the PERQUEUEDATA instance */
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HeapFree( GetProcessHeap(), 0, pQData );
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}
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}
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/***********************************************************************
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* PERQDATA_CreateInstance
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*
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* Creates an instance of a reference counted PERQUEUEDATA element
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* for the message queue. perQData is stored globally for 16 bit tasks.
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*
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* Note: We don't implement perQdata exactly the same way Windows does.
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* Each perQData element is reference counted since it may be potentially
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* shared by multiple message Queues (via AttachThreadInput).
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* We only store the current values for Active, Capture and focus windows
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* currently.
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*/
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static PERQUEUEDATA * PERQDATA_CreateInstance(void)
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{
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PERQUEUEDATA *pQData;
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BOOL16 bIsWin16 = 0;
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TRACE_(msg)("()\n");
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/* Share a single instance of perQData for all 16 bit tasks */
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if ( ( bIsWin16 = !(NtCurrentTeb()->tibflags & TEBF_WIN32) ) )
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{
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/* If previously allocated, just bump up ref count */
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if ( pQDataWin16 )
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{
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PERQDATA_Addref( pQDataWin16 );
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return pQDataWin16;
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}
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}
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/* Allocate PERQUEUEDATA from the system heap */
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if (!( pQData = (PERQUEUEDATA *) HeapAlloc( GetProcessHeap(), 0,
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sizeof(PERQUEUEDATA) ) ))
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return 0;
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/* Initialize */
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pQData->hWndCapture = pQData->hWndFocus = pQData->hWndActive = 0;
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pQData->ulRefCount = 1;
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pQData->nCaptureHT = HTCLIENT;
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/* Note: We have an independent critical section for the per queue data
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* since this may be shared by different threads. see AttachThreadInput()
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*/
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InitializeCriticalSection( &pQData->cSection );
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/* FIXME: not all per queue data critical sections should be global */
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MakeCriticalSectionGlobal( &pQData->cSection );
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/* Save perQData globally for 16 bit tasks */
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if ( bIsWin16 )
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pQDataWin16 = pQData;
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return pQData;
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}
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/***********************************************************************
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* PERQDATA_GetFocusWnd
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*
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* Get the focus hwnd member in a threadsafe manner
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*/
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HWND PERQDATA_GetFocusWnd( PERQUEUEDATA *pQData )
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{
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HWND hWndFocus;
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assert(pQData != 0 );
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EnterCriticalSection( &pQData->cSection );
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hWndFocus = pQData->hWndFocus;
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LeaveCriticalSection( &pQData->cSection );
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return hWndFocus;
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}
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/***********************************************************************
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* PERQDATA_SetFocusWnd
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*
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* Set the focus hwnd member in a threadsafe manner
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*/
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HWND PERQDATA_SetFocusWnd( PERQUEUEDATA *pQData, HWND hWndFocus )
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{
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HWND hWndFocusPrv;
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assert(pQData != 0 );
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EnterCriticalSection( &pQData->cSection );
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hWndFocusPrv = pQData->hWndFocus;
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pQData->hWndFocus = hWndFocus;
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LeaveCriticalSection( &pQData->cSection );
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return hWndFocusPrv;
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}
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/***********************************************************************
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* PERQDATA_GetActiveWnd
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*
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* Get the active hwnd member in a threadsafe manner
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*/
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HWND PERQDATA_GetActiveWnd( PERQUEUEDATA *pQData )
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{
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HWND hWndActive;
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assert(pQData != 0 );
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EnterCriticalSection( &pQData->cSection );
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hWndActive = pQData->hWndActive;
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LeaveCriticalSection( &pQData->cSection );
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return hWndActive;
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}
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/***********************************************************************
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* PERQDATA_SetActiveWnd
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*
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* Set the active focus hwnd member in a threadsafe manner
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*/
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HWND PERQDATA_SetActiveWnd( PERQUEUEDATA *pQData, HWND hWndActive )
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{
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HWND hWndActivePrv;
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assert(pQData != 0 );
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EnterCriticalSection( &pQData->cSection );
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hWndActivePrv = pQData->hWndActive;
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pQData->hWndActive = hWndActive;
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LeaveCriticalSection( &pQData->cSection );
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return hWndActivePrv;
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}
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/***********************************************************************
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* PERQDATA_GetCaptureWnd
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*
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* Get the capture hwnd member in a threadsafe manner
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*/
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HWND PERQDATA_GetCaptureWnd( INT *hittest )
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{
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MESSAGEQUEUE *queue;
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PERQUEUEDATA *pQData;
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HWND hWndCapture;
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if (!(queue = QUEUE_Current())) return 0;
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pQData = queue->pQData;
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EnterCriticalSection( &pQData->cSection );
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hWndCapture = pQData->hWndCapture;
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*hittest = pQData->nCaptureHT;
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LeaveCriticalSection( &pQData->cSection );
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return hWndCapture;
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}
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/***********************************************************************
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* PERQDATA_SetCaptureWnd
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*
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* Set the capture hwnd member in a threadsafe manner
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*/
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HWND PERQDATA_SetCaptureWnd( HWND hWndCapture, INT hittest )
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{
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MESSAGEQUEUE *queue;
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PERQUEUEDATA *pQData;
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HWND hWndCapturePrv;
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if (!(queue = QUEUE_Current())) return 0;
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pQData = queue->pQData;
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EnterCriticalSection( &pQData->cSection );
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hWndCapturePrv = pQData->hWndCapture;
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pQData->hWndCapture = hWndCapture;
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pQData->nCaptureHT = hittest;
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LeaveCriticalSection( &pQData->cSection );
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return hWndCapturePrv;
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}
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/***********************************************************************
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* QUEUE_Lock
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*
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* Function for getting a 32 bit pointer on queue structure. For thread
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* safeness programmers should use this function instead of GlobalLock to
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* retrieve a pointer on the structure. QUEUE_Unlock should also be called
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* when access to the queue structure is not required anymore.
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*/
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MESSAGEQUEUE *QUEUE_Lock( HQUEUE16 hQueue )
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{
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MESSAGEQUEUE *queue;
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HeapLock( GetProcessHeap() ); /* FIXME: a bit overkill */
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queue = GlobalLock16( hQueue );
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if ( !queue || (queue->magic != QUEUE_MAGIC) )
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{
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HeapUnlock( GetProcessHeap() );
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return NULL;
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}
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queue->lockCount++;
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HeapUnlock( GetProcessHeap() );
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return queue;
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}
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/***********************************************************************
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* QUEUE_Current
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*
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* Get the current thread queue, creating it if required.
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* QUEUE_Unlock is not needed since the queue can only be deleted by
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* the current thread anyway.
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*/
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MESSAGEQUEUE *QUEUE_Current(void)
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{
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MESSAGEQUEUE *queue;
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HQUEUE16 hQueue;
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if (!(hQueue = GetThreadQueue16(0)))
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{
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if (!(hQueue = InitThreadInput16( 0, 0 ))) return NULL;
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}
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if ((queue = GlobalLock16( hQueue )))
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{
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if (queue->magic != QUEUE_MAGIC) queue = NULL;
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}
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return queue;
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}
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/***********************************************************************
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* QUEUE_Unlock
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*
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* Use with QUEUE_Lock to get a thread safe access to message queue
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* structure
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*/
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void QUEUE_Unlock( MESSAGEQUEUE *queue )
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{
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if (queue)
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{
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HeapLock( GetProcessHeap() ); /* FIXME: a bit overkill */
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if ( --queue->lockCount == 0 )
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{
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if (queue->server_queue)
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CloseHandle( queue->server_queue );
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GlobalFree16( queue->self );
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}
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HeapUnlock( GetProcessHeap() );
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}
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}
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/***********************************************************************
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* QUEUE_CreateMsgQueue
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*
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* Creates a message queue. Doesn't link it into queue list!
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*/
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static HQUEUE16 QUEUE_CreateMsgQueue( BOOL16 bCreatePerQData )
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{
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HQUEUE16 hQueue;
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HANDLE handle;
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MESSAGEQUEUE * msgQueue;
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TRACE_(msg)("(): Creating message queue...\n");
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if (!(hQueue = GlobalAlloc16( GMEM_FIXED | GMEM_ZEROINIT,
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sizeof(MESSAGEQUEUE) )))
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return 0;
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msgQueue = (MESSAGEQUEUE *) GlobalLock16( hQueue );
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if ( !msgQueue )
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return 0;
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if (bCreatePerQData)
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{
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SERVER_START_REQ( get_msg_queue )
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{
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wine_server_call_err( req );
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handle = reply->handle;
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}
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SERVER_END_REQ;
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if (!handle)
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{
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ERR_(msg)("Cannot get thread queue");
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GlobalFree16( hQueue );
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return 0;
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}
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msgQueue->server_queue = handle;
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}
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msgQueue->self = hQueue;
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msgQueue->lockCount = 1;
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msgQueue->magic = QUEUE_MAGIC;
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/* Create and initialize our per queue data */
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msgQueue->pQData = bCreatePerQData ? PERQDATA_CreateInstance() : NULL;
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return hQueue;
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}
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/***********************************************************************
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* QUEUE_DeleteMsgQueue
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*
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* Unlinks and deletes a message queue.
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*
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* Note: We need to mask asynchronous events to make sure PostMessage works
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* even in the signal handler.
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*/
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void QUEUE_DeleteMsgQueue(void)
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{
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HQUEUE16 hQueue = GetThreadQueue16(0);
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MESSAGEQUEUE * msgQueue;
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if (!hQueue) return; /* thread doesn't have a queue */
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TRACE("(): Deleting message queue %04x\n", hQueue);
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if (!(msgQueue = QUEUE_Lock(hQueue)))
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{
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ERR("invalid thread queue\n");
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return;
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}
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msgQueue->magic = 0;
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if( hActiveQueue == hQueue ) hActiveQueue = 0;
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HeapLock( GetProcessHeap() ); /* FIXME: a bit overkill */
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/* Release per queue data if present */
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if ( msgQueue->pQData )
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{
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PERQDATA_Release( msgQueue->pQData );
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msgQueue->pQData = 0;
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}
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msgQueue->self = 0;
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HeapUnlock( GetProcessHeap() );
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SetThreadQueue16( 0, 0 );
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/* free up resource used by MESSAGEQUEUE structure */
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msgQueue->lockCount--;
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QUEUE_Unlock( msgQueue );
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}
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/***********************************************************************
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* GetWindowTask (USER.224)
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*/
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HTASK16 WINAPI GetWindowTask16( HWND16 hwnd )
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{
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HTASK16 retvalue;
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MESSAGEQUEUE *queue;
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WND *wndPtr = WIN_FindWndPtr16( hwnd );
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if (!wndPtr) return 0;
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queue = QUEUE_Lock( wndPtr->hmemTaskQ );
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WIN_ReleaseWndPtr(wndPtr);
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if (!queue) return 0;
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retvalue = queue->teb->htask16;
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QUEUE_Unlock( queue );
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return retvalue;
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}
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/***********************************************************************
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* InitThreadInput (USER.409)
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* InitThreadInput16 (USER32.@)
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*/
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HQUEUE16 WINAPI InitThreadInput16( WORD unknown, WORD flags )
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{
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MESSAGEQUEUE *queuePtr;
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HQUEUE16 hQueue = NtCurrentTeb()->queue;
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if ( !hQueue )
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{
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/* Create thread message queue */
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if( !(hQueue = QUEUE_CreateMsgQueue( TRUE )))
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{
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ERR_(msg)("failed!\n");
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return FALSE;
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}
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/* Link new queue into list */
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queuePtr = QUEUE_Lock( hQueue );
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queuePtr->teb = NtCurrentTeb();
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HeapLock( GetProcessHeap() ); /* FIXME: a bit overkill */
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SetThreadQueue16( 0, hQueue );
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NtCurrentTeb()->queue = hQueue;
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HeapUnlock( GetProcessHeap() );
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QUEUE_Unlock( queuePtr );
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}
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return hQueue;
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}
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/***********************************************************************
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* GetQueueStatus (USER32.@)
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*/
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DWORD WINAPI GetQueueStatus( UINT flags )
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{
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DWORD ret = 0;
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SERVER_START_REQ( get_queue_status )
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{
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req->clear = 1;
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wine_server_call( req );
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ret = MAKELONG( reply->changed_bits & flags, reply->wake_bits & flags );
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}
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SERVER_END_REQ;
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return ret;
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}
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/***********************************************************************
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* GetInputState (USER32.@)
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*/
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BOOL WINAPI GetInputState(void)
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{
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DWORD ret = 0;
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SERVER_START_REQ( get_queue_status )
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{
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req->clear = 0;
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wine_server_call( req );
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ret = reply->wake_bits & (QS_KEY | QS_MOUSEBUTTON);
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}
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SERVER_END_REQ;
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return ret;
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}
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/***********************************************************************
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* GetMessagePos (USER.119)
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* GetMessagePos (USER32.@)
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*
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* The GetMessagePos() function returns a long value representing a
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* cursor position, in screen coordinates, when the last message
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* retrieved by the GetMessage() function occurs. The x-coordinate is
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* in the low-order word of the return value, the y-coordinate is in
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* the high-order word. The application can use the MAKEPOINT()
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* macro to obtain a POINT structure from the return value.
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*
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* For the current cursor position, use GetCursorPos().
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*
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* RETURNS
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*
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* Cursor position of last message on success, zero on failure.
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*
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* CONFORMANCE
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*
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* ECMA-234, Win32
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*
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*/
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DWORD WINAPI GetMessagePos(void)
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{
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MESSAGEQUEUE *queue;
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if (!(queue = QUEUE_Current())) return 0;
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return queue->GetMessagePosVal;
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}
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/***********************************************************************
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* GetMessageTime (USER.120)
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* GetMessageTime (USER32.@)
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*
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* GetMessageTime() returns the message time for the last message
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* retrieved by the function. The time is measured in milliseconds with
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* the same offset as GetTickCount().
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*
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* Since the tick count wraps, this is only useful for moderately short
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* relative time comparisons.
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*
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* RETURNS
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*
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* Time of last message on success, zero on failure.
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*
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* CONFORMANCE
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*
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* ECMA-234, Win32
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*
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*/
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LONG WINAPI GetMessageTime(void)
|
|
{
|
|
MESSAGEQUEUE *queue;
|
|
|
|
if (!(queue = QUEUE_Current())) return 0;
|
|
return queue->GetMessageTimeVal;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetMessageExtraInfo (USER.288)
|
|
* GetMessageExtraInfo (USER32.@)
|
|
*/
|
|
LONG WINAPI GetMessageExtraInfo(void)
|
|
{
|
|
MESSAGEQUEUE *queue;
|
|
|
|
if (!(queue = QUEUE_Current())) return 0;
|
|
return queue->GetMessageExtraInfoVal;
|
|
}
|
|
|
|
|
|
/**********************************************************************
|
|
* AttachThreadInput (USER32.@) Attaches input of 1 thread to other
|
|
*
|
|
* Attaches the input processing mechanism of one thread to that of
|
|
* another thread.
|
|
*
|
|
* RETURNS
|
|
* Success: TRUE
|
|
* Failure: FALSE
|
|
*
|
|
* TODO:
|
|
* 1. Reset the Key State (currenly per thread key state is not maintained)
|
|
*/
|
|
BOOL WINAPI AttachThreadInput(
|
|
DWORD idAttach, /* [in] Thread to attach */
|
|
DWORD idAttachTo, /* [in] Thread to attach to */
|
|
BOOL fAttach) /* [in] Attach or detach */
|
|
{
|
|
MESSAGEQUEUE *pSrcMsgQ = 0, *pTgtMsgQ = 0;
|
|
BOOL16 bRet = 0;
|
|
|
|
SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
|
|
|
|
/* A thread cannot attach to itself */
|
|
if ( idAttach == idAttachTo )
|
|
goto CLEANUP;
|
|
|
|
/* According to the docs this method should fail if a
|
|
* "Journal record" hook is installed. (attaches all input queues together)
|
|
*/
|
|
if ( HOOK_IsHooked( WH_JOURNALRECORD ) )
|
|
goto CLEANUP;
|
|
|
|
/* Retrieve message queues corresponding to the thread id's */
|
|
pTgtMsgQ = QUEUE_Lock( GetThreadQueue16( idAttach ) );
|
|
pSrcMsgQ = QUEUE_Lock( GetThreadQueue16( idAttachTo ) );
|
|
|
|
/* Ensure we have message queues and that Src and Tgt threads
|
|
* are not system threads.
|
|
*/
|
|
if ( !pSrcMsgQ || !pTgtMsgQ || !pSrcMsgQ->pQData || !pTgtMsgQ->pQData )
|
|
goto CLEANUP;
|
|
|
|
if (fAttach) /* Attach threads */
|
|
{
|
|
/* Only attach if currently detached */
|
|
if ( pTgtMsgQ->pQData != pSrcMsgQ->pQData )
|
|
{
|
|
/* First release the target threads perQData */
|
|
PERQDATA_Release( pTgtMsgQ->pQData );
|
|
|
|
/* Share a reference to the source threads perQDATA */
|
|
PERQDATA_Addref( pSrcMsgQ->pQData );
|
|
pTgtMsgQ->pQData = pSrcMsgQ->pQData;
|
|
}
|
|
}
|
|
else /* Detach threads */
|
|
{
|
|
/* Only detach if currently attached */
|
|
if ( pTgtMsgQ->pQData == pSrcMsgQ->pQData )
|
|
{
|
|
/* First release the target threads perQData */
|
|
PERQDATA_Release( pTgtMsgQ->pQData );
|
|
|
|
/* Give the target thread its own private perQDATA once more */
|
|
pTgtMsgQ->pQData = PERQDATA_CreateInstance();
|
|
}
|
|
}
|
|
|
|
/* TODO: Reset the Key State */
|
|
|
|
bRet = 1; /* Success */
|
|
|
|
CLEANUP:
|
|
|
|
/* Unlock the queues before returning */
|
|
if ( pSrcMsgQ )
|
|
QUEUE_Unlock( pSrcMsgQ );
|
|
if ( pTgtMsgQ )
|
|
QUEUE_Unlock( pTgtMsgQ );
|
|
|
|
return bRet;
|
|
}
|