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/*
statemachineviewerutil.h
This file is part of GammaRay, the Qt application inspection and manipulation tool.
SPDX-FileCopyrightText: 2010 Klarälvdalens Datakonsult AB, a KDAB Group company <info@kdab.com>
Author: Kevin Funk <kevin.funk@kdab.com>
SPDX-License-Identifier: GPL-2.0-or-later
Contact KDAB at <info@kdab.com> for commercial licensing options.
*/
#ifndef GAMMARAY_STATEMACHINEVIEWER_STATEMACHINEVIEWERUTIL_H
#define GAMMARAY_STATEMACHINEVIEWER_STATEMACHINEVIEWERUTIL_H
#include <QQueue>
template<class T>
class RingBuffer
{
public:
RingBuffer()
: m_size(5)
{
}
void resize(int size)
{
Q_ASSERT(size > 0);
m_size = size;
cleanup();
}
void enqueue(T t)
{
m_entries.enqueue(t);
cleanup();
}
void clear()
{
m_entries.clear();
}
int size() const
{
return m_entries.size();
}
T tail() const
{
return m_entries.last();
}
QList<T> entries() const
{
return m_entries;
}
private:
void cleanup()
{
while (m_entries.size() > m_size)
m_entries.dequeue();
}
QQueue<T> m_entries;
int m_size;
};
#endif
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