You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
75 lines
2.4 KiB
75 lines
2.4 KiB
11 years ago
|
|
||
|
|
package com.vladium.utils.timing;
|
||
|
|
|
||
|
|
// ----------------------------------------------------------------------------
|
||
|
|
/**
|
||
|
|
* A package-private implementation of {@link ITimer} based around Java system
|
||
|
|
* timer [<code>System.currentTimeMillis()</code> method]. It is used when
|
||
|
|
* <code>HRTimer</code> implementation is unavailable.<P>
|
||
|
|
*
|
||
|
|
* {@link TimerFactory} acts as the Factory for this class.<P>
|
||
|
|
*
|
||
|
|
* MT-safety: an instance of this class is safe to be used within the same
|
||
|
|
* thread only.
|
||
|
|
*
|
||
|
|
* @author (C) <a href="mailto:vroubtsov@illinoisalumni.org">Vlad Roubtsov</a>, 2002
|
||
|
|
*/
|
||
|
|
final class JavaSystemTimer implements ITimer, ITimerConstants
|
||
|
|
{
|
||
|
|
// public: ................................................................
|
||
|
|
|
||
|
|
public void start ()
|
||
|
|
{
|
||
|
|
if (DO_STATE_CHECKS)
|
||
|
|
{
|
||
|
|
if (m_state != STATE_READY)
|
||
|
|
throw new IllegalStateException (this + ": start() must be called from READY state, current state is " + STATE_NAMES [m_state]);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (DO_STATE_CHECKS) m_state = STATE_STARTED;
|
||
|
|
m_data = System.currentTimeMillis ();
|
||
|
|
}
|
||
|
|
|
||
|
|
public void stop ()
|
||
|
|
{
|
||
|
|
// latch stop time in a local var before doing anything else:
|
||
|
|
final long data = System.currentTimeMillis ();
|
||
|
|
|
||
|
|
if (DO_STATE_CHECKS)
|
||
|
|
{
|
||
|
|
if (m_state != STATE_STARTED)
|
||
|
|
throw new IllegalStateException (this + ": stop() must be called from STARTED state, current state is " + STATE_NAMES [m_state]);
|
||
|
|
}
|
||
|
|
|
||
|
|
m_data = data - m_data;
|
||
|
|
if (DO_STATE_CHECKS) m_state = STATE_STOPPED;
|
||
|
|
}
|
||
|
|
|
||
|
|
public double getDuration ()
|
||
|
|
{
|
||
|
|
if (DO_STATE_CHECKS)
|
||
|
|
{
|
||
|
|
if (m_state != STATE_STOPPED)
|
||
|
|
throw new IllegalStateException (this + ": getDuration() must be called from STOPPED state, current state is " + STATE_NAMES [m_state]);
|
||
|
|
}
|
||
|
|
|
||
|
|
return m_data;
|
||
|
|
}
|
||
|
|
|
||
|
|
public void reset ()
|
||
|
|
{
|
||
|
|
if (DO_STATE_CHECKS) m_state = STATE_READY;
|
||
|
|
}
|
||
|
|
|
||
|
|
// protected: .............................................................
|
||
|
|
|
||
|
|
// package: ...............................................................
|
||
|
|
|
||
|
|
// private: ...............................................................
|
||
|
|
|
||
|
|
private int m_state; // used to keep track of timer state
|
||
|
|
private long m_data; // timing data
|
||
|
|
|
||
|
|
} // end of class
|
||
|
|
// ----------------------------------------------------------------------------
|