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139 lines
3.5 KiB
C
139 lines
3.5 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 "config.h"
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#include "wine/port.h"
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#include <stdarg.h>
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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 "winbase.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 "message.h"
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#include "win.h"
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#include "user_private.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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WINE_DEFAULT_DEBUG_CHANNEL(msg);
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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(void)
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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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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\n");
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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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msgQueue->self = hQueue;
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return hQueue;
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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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HQUEUE16 hQueue = NtCurrentTeb()->queue;
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if (!hQueue)
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{
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if (!(hQueue = QUEUE_CreateMsgQueue())) return NULL;
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SetThreadQueue16( 0, hQueue );
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}
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return GlobalLock16( hQueue );
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}
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/***********************************************************************
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* QUEUE_DeleteMsgQueue
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*
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* Delete a message queue.
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*/
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void QUEUE_DeleteMsgQueue(void)
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{
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HQUEUE16 hQueue = NtCurrentTeb()->queue;
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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 = GlobalLock16( 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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SetThreadQueue16( 0, 0 );
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CloseHandle( msgQueue->server_queue );
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GlobalFree16( hQueue );
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}
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/***********************************************************************
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* InitThreadInput (USER.409)
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*/
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HQUEUE16 WINAPI InitThreadInput16( WORD unknown, WORD flags )
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{
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MESSAGEQUEUE *queue = QUEUE_Current();
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return queue ? queue->self : 0;
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}
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