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/*
* synergy -- mouse and keyboard sharing utility
* Copyright (C) 2004 Chris Schoeneman
*
* This package is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* found in the file COPYING that should have accompanied this file.
*
* This package 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.
*/
#include "CSimpleEventQueueBuffer.h"
#include "CStopwatch.h"
#include "CArch.h"
class CEventQueueTimer { };
//
// CSimpleEventQueueBuffer
//
CSimpleEventQueueBuffer::CSimpleEventQueueBuffer()
{
m_queueMutex = ARCH->newMutex();
m_queueReadyCond = ARCH->newCondVar();
m_queueReady = false;
}
CSimpleEventQueueBuffer::~CSimpleEventQueueBuffer()
{
ARCH->closeCondVar(m_queueReadyCond);
ARCH->closeMutex(m_queueMutex);
}
void
CSimpleEventQueueBuffer::waitForEvent(double timeout)
{
CArchMutexLock lock(m_queueMutex);
CStopwatch timer(true);
while (!m_queueReady) {
double timeLeft = timeout;
if (timeLeft >= 0.0) {
timeLeft -= timer.getTime();
if (timeLeft < 0.0) {
return;
}
}
ARCH->waitCondVar(m_queueReadyCond, m_queueMutex, timeLeft);
}
}
IEventQueueBuffer::Type
CSimpleEventQueueBuffer::getEvent(CEvent&, UInt32& dataID)
{
CArchMutexLock lock(m_queueMutex);
if (!m_queueReady) {
return kNone;
}
dataID = m_queue.back();
m_queue.pop_back();
m_queueReady = !m_queue.empty();
return kUser;
}
bool
CSimpleEventQueueBuffer::addEvent(UInt32 dataID)
{
CArchMutexLock lock(m_queueMutex);
m_queue.push_front(dataID);
if (!m_queueReady) {
m_queueReady = true;
ARCH->broadcastCondVar(m_queueReadyCond);
}
return true;
}
bool
CSimpleEventQueueBuffer::isEmpty() const
{
CArchMutexLock lock(m_queueMutex);
return !m_queueReady;
}
CEventQueueTimer*
CSimpleEventQueueBuffer::newTimer(double, bool) const
{
return new CEventQueueTimer;
}
void
CSimpleEventQueueBuffer::deleteTimer(CEventQueueTimer* timer) const
{
delete timer;
}
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