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147 lines
3.8 KiB
147 lines
3.8 KiB
/*****************************************************************************
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* async_queue.cpp
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*****************************************************************************
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* Copyright (C) 2003 the VideoLAN team
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* $Id$
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*
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* Authors: Cyril Deguet <asmax@via.ecp.fr>
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* Olivier Teulière <ipkiss@via.ecp.fr>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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#include "async_queue.hpp"
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#include "../src/os_factory.hpp"
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#include "../src/os_timer.hpp"
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AsyncQueue::AsyncQueue( intf_thread_t *pIntf ): SkinObject( pIntf ),
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m_cmdFlush( this )
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{
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// Initialize the mutex
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vlc_mutex_init( pIntf, &m_lock );
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// Create a timer
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OSFactory *pOsFactory = OSFactory::instance( pIntf );
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m_pTimer = pOsFactory->createOSTimer( m_cmdFlush );
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// Flush the queue every 10 ms
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m_pTimer->start( 10, false );
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}
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AsyncQueue::~AsyncQueue()
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{
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delete( m_pTimer );
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vlc_mutex_destroy( &m_lock );
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}
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AsyncQueue *AsyncQueue::instance( intf_thread_t *pIntf )
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{
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if( ! pIntf->p_sys->p_queue )
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{
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AsyncQueue *pQueue;
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pQueue = new AsyncQueue( pIntf );
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if( pQueue )
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{
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// Initialization succeeded
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pIntf->p_sys->p_queue = pQueue;
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}
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}
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return pIntf->p_sys->p_queue;
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}
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void AsyncQueue::destroy( intf_thread_t *pIntf )
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{
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if( pIntf->p_sys->p_queue )
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{
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delete pIntf->p_sys->p_queue;
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pIntf->p_sys->p_queue = NULL;
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}
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}
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void AsyncQueue::push( const CmdGenericPtr &rcCommand, bool removePrev )
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{
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if( removePrev )
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{
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// Remove the commands of the same type
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remove( rcCommand.get()->getType(), rcCommand );
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}
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m_cmdList.push_back( rcCommand );
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}
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void AsyncQueue::remove( const string &rType, const CmdGenericPtr &rcCommand )
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{
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vlc_mutex_lock( &m_lock );
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list<CmdGenericPtr>::iterator it;
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for( it = m_cmdList.begin(); it != m_cmdList.end(); it++ )
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{
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// Remove the command if it is of the given type
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if( (*it).get()->getType() == rType )
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{
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// Maybe the command wants to check if it must really be
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// removed
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if( rcCommand.get()->checkRemove( (*it).get() ) == true )
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{
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list<CmdGenericPtr>::iterator itNew = it;
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itNew++;
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m_cmdList.erase( it );
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it = itNew;
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}
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}
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}
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vlc_mutex_unlock( &m_lock );
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}
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void AsyncQueue::flush()
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{
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while (true)
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{
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vlc_mutex_lock( &m_lock );
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if( m_cmdList.size() > 0 )
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{
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// Pop the first command from the queue
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CmdGenericPtr cCommand = m_cmdList.front();
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m_cmdList.pop_front();
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// Unlock the mutex to avoid deadlocks if another thread wants to
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// enqueue/remove a command while this one is processed
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vlc_mutex_unlock( &m_lock );
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// Execute the command
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cCommand.get()->execute();
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}
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else
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{
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vlc_mutex_unlock( &m_lock );
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break;
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}
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}
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}
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void AsyncQueue::CmdFlush::execute()
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{
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// Flush the queue
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m_pParent->flush();
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}
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