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/*******************************************************************************
* Copyright (c) 2012 Draeger Medical GmbH (http://www.draeger.com).
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* CONTRIBUTORS:
* Peter Karlitschek (initial contribution)
*
*******************************************************************************/
#include "MessageSeQueue.h"
namespace etRuntime {
MessageSeQueue::MessageSeQueue(IRTObject* parent, const std::string& name)
: RTObject(parent, name),
m_first(0),
m_last(0),
m_highWaterMark(0),
m_size(0)
{
}
MessageSeQueue::~MessageSeQueue() {
m_first = 0;
m_last = 0;
}
void MessageSeQueue::push(Message* msg) {
// TODO: optimize queue for concurrent push / pop
if (m_first == 0) {
m_first = m_last = msg;
} else {
m_last->setNext(msg);
m_last = msg;
}
if (++m_size > m_highWaterMark)
m_highWaterMark++;
}
const Message* MessageSeQueue::pop() {
// TODO: optimize queue for concurrent push / pop
Message* pop_msg = m_first;
if (m_first == 0) {
return m_first;
}
if (m_first->getNext() == 0) {
m_first = m_last = 0;
} else {
m_first = m_first->getNext();
}
pop_msg->setNext(0);
m_size--;
return pop_msg;
}
} /* namespace etRuntime */
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