[r35733]: branches / AudioEngine / xbmc / cores / AudioEngine / Engines / PulseAEEventThread.cpp  Maximize  Restore  History

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/*
* Copyright (C) 2005-2010 Team XBMC
* http://xbmc.org
*
* 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, 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 XBMC; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
* http://www.gnu.org/copyleft/gpl.html
*
*/
#include "system.h"
#ifdef HAS_PULSEAUDIO
#include "PulseAEEventThread.h"
#include "AEUtil.h"
#include "log.h"
#include "utils/SingleLock.h"
CPulseAEEventThread::CPulseAEEventThread(CPulseAEStream *stream) :
m_run (true ),
m_stream(stream),
m_thread(this ),
m_cbFunc(NULL ),
m_arg (NULL )
{
m_thread.Create();
}
CPulseAEEventThread::~CPulseAEEventThread()
{
/* tell the thread we are terminating */
CSingleLock lock(m_lock);
m_run = false;
lock.Leave();
/* trigger the event incase it is blocking */
Trigger();
/* wait for the thread to exit */
m_thread.StopThread(true);
}
void CPulseAEEventThread::SetCallback(IAEStream::AECBFunc *cbFunc, void *arg)
{
CSingleLock lock(m_lock);
m_cbFunc = cbFunc;
m_arg = arg;
}
void CPulseAEEventThread::Trigger()
{
CSingleLock lock(m_lockEvent);
m_event.Set();
}
void CPulseAEEventThread::Run()
{
/*
this thread has to be VERY careful not to leave m_lock locked
when m_cbFunc is called, otherwise signals generated by calls
in the callback function WILL cause a deadlock when the next
signal signal arrives
*/
CSingleLock lock(m_lock);
while(m_run)
{
lock.Leave();
/* wait on the event */
m_event.Wait();
lock.Enter();
if (!m_run)
return;
/* fire the callback */
if (m_cbFunc)
m_cbFunc(m_stream, m_arg, m_stream->GetSpace());
/* reset the event */
CSingleLock lockEvent(m_lockEvent);
m_event.Reset();
lockEvent.Leave();
}
}
#endif