x11_timer.cpp
上传用户:riyaled888
上传日期:2009-03-27
资源大小:7338k
文件大小:4k
- /*****************************************************************************
- * x11_timer.cpp
- *****************************************************************************
- * Copyright (C) 2003 VideoLAN
- * $Id: x11_timer.cpp 6961 2004-03-05 17:34:23Z sam $
- *
- * Authors: Cyril Deguet <asmax@via.ecp.fr>
- * Olivier Teuli鑢e <ipkiss@via.ecp.fr>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- #ifdef X11_SKINS
- #include <unistd.h>
- #include <fcntl.h>
- #include "x11_timer.hpp"
- #include "x11_factory.hpp"
- X11Timer::X11Timer( intf_thread_t *pIntf, const Callback &rCallback ):
- OSTimer( pIntf ), m_callback( rCallback )
- {
- // Get the instance of timer loop
- X11Factory *m_pOsFactory = (X11Factory*)(OSFactory::instance( pIntf ) );
- m_pTimerLoop = m_pOsFactory->getTimerLoop();
- }
- X11Timer::~X11Timer()
- {
- stop();
- }
- void X11Timer::start( int delay, bool oneShot )
- {
- m_interval = 1000 * delay;
- m_oneShot = oneShot;
- m_nextDate = mdate() + m_interval;
- m_pTimerLoop->addTimer( *this );
- }
- void X11Timer::stop()
- {
- m_pTimerLoop->removeTimer( *this );
- }
- mtime_t X11Timer::getNextDate() const
- {
- return m_nextDate;
- }
- bool X11Timer::execute()
- {
- m_nextDate += m_interval;
- // Execute the callback
- (*(m_callback.getFunc()))( m_callback.getObj() );
- return !m_oneShot;
- }
- X11TimerLoop::X11TimerLoop( intf_thread_t *pIntf, int connectionNumber ):
- SkinObject( pIntf ), m_connectionNumber( connectionNumber )
- {
- }
- X11TimerLoop::~X11TimerLoop()
- {
- }
- void X11TimerLoop::addTimer( X11Timer &rTimer )
- {
- m_timers.push_back( &rTimer );
- }
- void X11TimerLoop::removeTimer( X11Timer &rTimer )
- {
- m_timers.remove( &rTimer );
- }
- void X11TimerLoop::waitNextTimer()
- {
- mtime_t curDate = mdate();
- mtime_t nextDate = LAST_MDATE;
- X11Timer *nextTimer = NULL;
- // Find the next timer to execute
- list<X11Timer*>::const_iterator timer;
- for( timer = m_timers.begin(); timer != m_timers.end(); timer++ )
- {
- mtime_t timerDate = (*timer)->getNextDate();
- if( timerDate < nextDate )
- {
- nextTimer = *timer;
- nextDate = timerDate;
- }
- }
- if( nextTimer == NULL )
- {
- this->sleep( 1000 );
- }
- else
- {
- if( nextDate > curDate )
- {
- if( this->sleep( (nextDate - curDate ) / 1000 ) )
- {
- // The sleep has been interrupted: stop here
- return;
- }
- }
- // Execute the timer callback
- if( ! nextTimer->execute() )
- {
- // Remove the timer if execute() returned false
- m_timers.remove( nextTimer );
- }
- }
- }
- bool X11TimerLoop::sleep( int delay )
- {
- // Timeout delay
- struct timeval tv;
- tv.tv_sec = delay / 1000;
- tv.tv_usec = 1000 * (delay % 1000);
- // FD set for select()
- fd_set rfds;
- FD_ZERO( &rfds );
- FD_SET( m_connectionNumber, &rfds );
- // Wait for an X11 event, or timeout
- int num = select( m_connectionNumber + 1, &rfds, NULL, NULL, &tv );
- return ( num > 0 );
- }
- #endif