Sweden-Number/windows/queue.c

249 lines
6.2 KiB
C

/*
* Message queues related functions
*
* Copyright 1993, 1994 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <string.h>
#include <signal.h>
#include <assert.h>
#include "windef.h"
#include "wingdi.h"
#include "winerror.h"
#include "wine/winbase16.h"
#include "wine/winuser16.h"
#include "message.h"
#include "win.h"
#include "user.h"
#include "thread.h"
#include "wine/debug.h"
#include "wine/server.h"
WINE_DEFAULT_DEBUG_CHANNEL(msg);
/***********************************************************************
* QUEUE_CreateMsgQueue
*
* Creates a message queue. Doesn't link it into queue list!
*/
static HQUEUE16 QUEUE_CreateMsgQueue(void)
{
HQUEUE16 hQueue;
HANDLE handle;
MESSAGEQUEUE * msgQueue;
TRACE_(msg)("(): Creating message queue...\n");
if (!(hQueue = GlobalAlloc16( GMEM_FIXED | GMEM_ZEROINIT,
sizeof(MESSAGEQUEUE) )))
return 0;
msgQueue = (MESSAGEQUEUE *) GlobalLock16( hQueue );
if ( !msgQueue )
return 0;
SERVER_START_REQ( get_msg_queue )
{
wine_server_call_err( req );
handle = reply->handle;
}
SERVER_END_REQ;
if (!handle)
{
ERR_(msg)("Cannot get thread queue");
GlobalFree16( hQueue );
return 0;
}
msgQueue->server_queue = handle;
msgQueue->self = hQueue;
return hQueue;
}
/***********************************************************************
* QUEUE_Current
*
* Get the current thread queue, creating it if required.
* QUEUE_Unlock is not needed since the queue can only be deleted by
* the current thread anyway.
*/
MESSAGEQUEUE *QUEUE_Current(void)
{
HQUEUE16 hQueue = NtCurrentTeb()->queue;
if (!hQueue)
{
if (!(hQueue = QUEUE_CreateMsgQueue())) return NULL;
SetThreadQueue16( 0, hQueue );
}
return GlobalLock16( hQueue );
}
/***********************************************************************
* QUEUE_DeleteMsgQueue
*
* Delete a message queue.
*/
void QUEUE_DeleteMsgQueue(void)
{
HQUEUE16 hQueue = NtCurrentTeb()->queue;
MESSAGEQUEUE * msgQueue;
if (!hQueue) return; /* thread doesn't have a queue */
TRACE("(): Deleting message queue %04x\n", hQueue);
if (!(msgQueue = GlobalLock16( hQueue )))
{
ERR("invalid thread queue\n");
return;
}
SetThreadQueue16( 0, 0 );
CloseHandle( msgQueue->server_queue );
GlobalFree16( hQueue );
}
/***********************************************************************
* InitThreadInput (USER.409)
*/
HQUEUE16 WINAPI InitThreadInput16( WORD unknown, WORD flags )
{
MESSAGEQUEUE *queue = QUEUE_Current();
return queue ? queue->self : 0;
}
/***********************************************************************
* GetQueueStatus (USER32.@)
*/
DWORD WINAPI GetQueueStatus( UINT flags )
{
DWORD ret = 0;
/* check for pending X events */
if (USER_Driver.pMsgWaitForMultipleObjectsEx)
USER_Driver.pMsgWaitForMultipleObjectsEx( 0, NULL, 0, 0, 0 );
SERVER_START_REQ( get_queue_status )
{
req->clear = 1;
wine_server_call( req );
ret = MAKELONG( reply->changed_bits & flags, reply->wake_bits & flags );
}
SERVER_END_REQ;
return ret;
}
/***********************************************************************
* GetInputState (USER32.@)
*/
BOOL WINAPI GetInputState(void)
{
DWORD ret = 0;
/* check for pending X events */
if (USER_Driver.pMsgWaitForMultipleObjectsEx)
USER_Driver.pMsgWaitForMultipleObjectsEx( 0, NULL, 0, 0, 0 );
SERVER_START_REQ( get_queue_status )
{
req->clear = 0;
wine_server_call( req );
ret = reply->wake_bits & (QS_KEY | QS_MOUSEBUTTON);
}
SERVER_END_REQ;
return ret;
}
/***********************************************************************
* GetMessagePos (USER.119)
* GetMessagePos (USER32.@)
*
* The GetMessagePos() function returns a long value representing a
* cursor position, in screen coordinates, when the last message
* retrieved by the GetMessage() function occurs. The x-coordinate is
* in the low-order word of the return value, the y-coordinate is in
* the high-order word. The application can use the MAKEPOINT()
* macro to obtain a POINT structure from the return value.
*
* For the current cursor position, use GetCursorPos().
*
* RETURNS
*
* Cursor position of last message on success, zero on failure.
*
* CONFORMANCE
*
* ECMA-234, Win32
*
*/
DWORD WINAPI GetMessagePos(void)
{
MESSAGEQUEUE *queue;
if (!(queue = QUEUE_Current())) return 0;
return queue->GetMessagePosVal;
}
/***********************************************************************
* GetMessageTime (USER.120)
* GetMessageTime (USER32.@)
*
* GetMessageTime() returns the message time for the last message
* retrieved by the function. The time is measured in milliseconds with
* the same offset as GetTickCount().
*
* Since the tick count wraps, this is only useful for moderately short
* relative time comparisons.
*
* RETURNS
*
* Time of last message on success, zero on failure.
*
* CONFORMANCE
*
* ECMA-234, Win32
*
*/
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;
}