org.tritonus.midi.device.java.SunMiscPerfClock Maven / Gradle / Ivy
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/*
* SunMiscPerfClock.java
*
* This file is part of Tritonus: http://www.tritonus.org/
*/
/*
* Copyright (c) 2003 by Matthias Pfisterer
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as published
* by the Free Software Foundation; either version 2 of the License, 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 Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
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*/
package org.tritonus.midi.device.java;
import sun.misc.Perf;
/** Sequencer clock based on sun.misc.Perf.
Sun JDK 1.4.2 or later is required to compile this class.
*/
public class SunMiscPerfClock
implements JavaSequencer.Clock
{
private Perf m_perf;
private long m_lTicksPerSecond;
public SunMiscPerfClock()
{
m_perf = Perf.getPerf(); // may throw SecurityException
m_lTicksPerSecond = m_perf.highResFrequency();
}
/** Retrieve system time in microseconds.
This method retrieves the time by calling
{@link sun.misc.Perf}.
@return the system time in microseconds
*/
public long getMicroseconds()
{
return (m_perf.highResCounter() * 1000000) / m_lTicksPerSecond;
}
}
/*** SunMiscPerfClock.java ***/