Behold, Nenya, Ring of Water and repository for our media and animation related
goodies, both Java 2D and LWJGL/JME 3D. git-svn-id: svn+ssh://src.earth.threerings.net/nenya/trunk@1 ed5b42cb-e716-0410-a449-f6a68f950b19
This commit is contained in:
Michael Bayne
@@ -0,0 +1,52 @@
|
||||
//
|
||||
// $Id: MediaTimer.java 4191 2006-06-13 22:42:20Z ray $
|
||||
//
|
||||
// Narya library - tools for developing networked games
|
||||
// Copyright (C) 2002-2004 Three Rings Design, Inc., All Rights Reserved
|
||||
// http://www.threerings.net/code/narya/
|
||||
//
|
||||
// This library is free software; you can redistribute it and/or modify it
|
||||
// under the terms of the GNU Lesser General Public License as published
|
||||
// by the Free Software Foundation; either version 2.1 of the License, or
|
||||
// (at your option) any later version.
|
||||
//
|
||||
// This library 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
|
||||
// Lesser General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU Lesser General Public
|
||||
// License along with this library; if not, write to the Free Software
|
||||
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
|
||||
package com.threerings.media.timer;
|
||||
|
||||
/**
|
||||
* Provides a pluggable mechanism for delivering high resolution timing
|
||||
* information. The timers are not intended to be used by different
|
||||
* threads and thus must be protected by synchronization in such
|
||||
* circumstances.
|
||||
*/
|
||||
public interface MediaTimer
|
||||
{
|
||||
/**
|
||||
* Resets the timer's monotonically increasing value.
|
||||
*/
|
||||
public void reset ();
|
||||
|
||||
/**
|
||||
* Returns the number of milliseconds that have elapsed since the
|
||||
* timer was created or last {@link #reset}. <em>Note:</em> the
|
||||
* accuracy of this method is highly dependent on the timer
|
||||
* implementation used.
|
||||
*/
|
||||
public long getElapsedMillis ();
|
||||
|
||||
/**
|
||||
* Returns the number of microseconds that have elapsed since the
|
||||
* timer was created or last {@link #reset}. <em>Note:</em> the
|
||||
* accuracy of this method is highly dependent on the timer
|
||||
* implementation used.
|
||||
*/
|
||||
public long getElapsedMicros ();
|
||||
}
|
||||
@@ -0,0 +1,69 @@
|
||||
//
|
||||
// $Id: PerfTimer.java 4191 2006-06-13 22:42:20Z ray $
|
||||
//
|
||||
// Narya library - tools for developing networked games
|
||||
// Copyright (C) 2002-2004 Three Rings Design, Inc., All Rights Reserved
|
||||
// http://www.threerings.net/code/narya/
|
||||
//
|
||||
// This library is free software; you can redistribute it and/or modify it
|
||||
// under the terms of the GNU Lesser General Public License as published
|
||||
// by the Free Software Foundation; either version 2.1 of the License, or
|
||||
// (at your option) any later version.
|
||||
//
|
||||
// This library 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
|
||||
// Lesser General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU Lesser General Public
|
||||
// License along with this library; if not, write to the Free Software
|
||||
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
|
||||
package com.threerings.media.timer;
|
||||
|
||||
import sun.misc.Perf;
|
||||
|
||||
import com.threerings.media.Log;
|
||||
|
||||
/**
|
||||
* A timer that uses the performance clock exposed by Sun in JDK 1.4.2.
|
||||
*/
|
||||
public class PerfTimer implements MediaTimer
|
||||
{
|
||||
public PerfTimer ()
|
||||
{
|
||||
_timer = Perf.getPerf();
|
||||
_mfrequency = _timer.highResFrequency() / 1000;
|
||||
_ufrequency = _timer.highResFrequency() / 1000000;
|
||||
_startStamp = _timer.highResCounter();
|
||||
Log.info("Using high performance timer [mfreq=" + _mfrequency +
|
||||
", ufreq=" + _ufrequency + ", start=" + _startStamp + "].");
|
||||
}
|
||||
|
||||
// documentation inherited from interface
|
||||
public void reset ()
|
||||
{
|
||||
_startStamp = _timer.highResCounter();
|
||||
}
|
||||
|
||||
// documentation inherited from interface
|
||||
public long getElapsedMillis ()
|
||||
{
|
||||
return (_timer.highResCounter() - _startStamp) / _mfrequency;
|
||||
}
|
||||
|
||||
// documentation inherited from interface
|
||||
public long getElapsedMicros ()
|
||||
{
|
||||
return (_timer.highResCounter() - _startStamp) / _ufrequency;
|
||||
}
|
||||
|
||||
/** A performance timer object. */
|
||||
protected Perf _timer;
|
||||
|
||||
/** The time at which this timer was last reset. */
|
||||
protected long _startStamp;
|
||||
|
||||
/** The timer frequencies. */
|
||||
protected long _mfrequency, _ufrequency;
|
||||
}
|
||||
@@ -0,0 +1,60 @@
|
||||
//
|
||||
// $Id: SystemMediaTimer.java 4191 2006-06-13 22:42:20Z ray $
|
||||
//
|
||||
// Narya library - tools for developing networked games
|
||||
// Copyright (C) 2002-2004 Three Rings Design, Inc., All Rights Reserved
|
||||
// http://www.threerings.net/code/narya/
|
||||
//
|
||||
// This library is free software; you can redistribute it and/or modify it
|
||||
// under the terms of the GNU Lesser General Public License as published
|
||||
// by the Free Software Foundation; either version 2.1 of the License, or
|
||||
// (at your option) any later version.
|
||||
//
|
||||
// This library 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
|
||||
// Lesser General Public License for more details.
|
||||
//
|
||||
// You should have received a copy of the GNU Lesser General Public
|
||||
// License along with this library; if not, write to the Free Software
|
||||
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
|
||||
package com.threerings.media.timer;
|
||||
|
||||
/**
|
||||
* Implements the {@link MediaTimer} interface using {@link
|
||||
* System#currentTimeMillis} to obtain timing information.
|
||||
*
|
||||
* <p> <em>Note:</em> {@link System#currentTimeMillis} is notoriously
|
||||
* inaccurate on different platforms. See <a
|
||||
* href="http://developer.java.sun.com/developer/bugParade/bugs/4486109.html">
|
||||
* bug report 4486109</a> for more information.
|
||||
*
|
||||
* <p> <em>Also note:</em> clock drift on Windows XP is especially
|
||||
* pronounced and is exacerbated by the fact that WinXP periodically
|
||||
* resyncs the system clock with the hardware clock, causing discontinuous
|
||||
* jumps in the progression of time (usually backwards in time).
|
||||
*/
|
||||
public class SystemMediaTimer implements MediaTimer
|
||||
{
|
||||
// documentation inherited from interface
|
||||
public void reset ()
|
||||
{
|
||||
_resetStamp = System.currentTimeMillis();
|
||||
}
|
||||
|
||||
// documentation inherited from interface
|
||||
public long getElapsedMillis ()
|
||||
{
|
||||
return System.currentTimeMillis() - _resetStamp;
|
||||
}
|
||||
|
||||
// documentation inherited from interface
|
||||
public long getElapsedMicros ()
|
||||
{
|
||||
return getElapsedMillis() * 10;
|
||||
}
|
||||
|
||||
/** The time at which this timer was last reset. */
|
||||
protected long _resetStamp = System.currentTimeMillis();
|
||||
}
|
||||
Reference in New Issue
Block a user