- * - * Make sure that hrtlib.dll JNI lib is in java.library.path or TimerFactory - * will fall back to the Java system timer: - *
- * >java -Djava.library.path=(dir containing hrtlib.dll) HRTimerResolution - *- * - * @author (C) Vlad Roubtsov, 2002 - */ -public class HRTimerResolution -{ - // public: ................................................................ - - public static void main (final String [] args) throws Exception - { - final DecimalFormat format = new DecimalFormat (); - format.setMinimumFractionDigits (3); - format.setMaximumFractionDigits (3); - - // create an ITimer using the Factory class: - final ITimer timer = TimerFactory.newTimer (); - - // JIT/hotspot warmup: - for (int i = 0; i < 3000; ++ i) - { - timer.start (); - timer.stop (); - timer.getDuration (); - timer.reset (); - } - - final Object lock = new Object (); // this is used by monitor.wait() below - - for (int i = 0; i < 5; ++ i) - { - timer.start (); - - // uncomment various lines below to see the resolution - // offered by other Java time-related methods; with all - // lines commented out this loop reports time elapsed - // between successive calls to t.start() and t.stop(), thus - // providing an estimate for timer's raw resolution - - synchronized (lock) { lock.wait (1); } - //Thread.currentThread ().sleep (1); - //Thread.currentThread ().sleep (0, 500); - //Thread.currentThread ().join (1); - - timer.stop (); - - System.out.println ("duration = " - + format.format (timer.getDuration ()) + " ms"); - timer.reset (); - } - } - -} // end of class -// ---------------------------------------------------------------------------- diff --git a/timer/SystemTimerResolution.java b/timer/SystemTimerResolution.java deleted file mode 100644 index 56ececd..0000000 --- a/timer/SystemTimerResolution.java +++ /dev/null @@ -1,31 +0,0 @@ -// ---------------------------------------------------------------------------- -/** - * A simple class to see what the Java system timer resolution is on your - * system. - * - * @author (C) Vlad Roubtsov, 2002 - */ -public class SystemTimerResolution -{ - // public: ................................................................ - - public static void main (final String [] args) - { - // JIT/hotspot warmup: - for (int r = 0; r < 3000; ++ r) System.currentTimeMillis (); - - long time = System.currentTimeMillis (), time_prev = time; - - for (int i = 0; i < 5; ++ i) - { - // busy wait until system time changes: - while (time == time_prev) - time = System.currentTimeMillis (); - - System.out.println ("delta = " + (time - time_prev) + " ms"); - time_prev = time; - } - } - -} // end of class -// ---------------------------------------------------------------------------- diff --git a/timer/com/vladium/utils/timing/HRTimer.java b/timer/com/vladium/utils/timing/HRTimer.java deleted file mode 100644 index a3673a1..0000000 --- a/timer/com/vladium/utils/timing/HRTimer.java +++ /dev/null @@ -1,86 +0,0 @@ - -package com.vladium.utils.timing; - -// ---------------------------------------------------------------------------- -/** - * A package-private implementation of {@link ITimer} based around native - *
getTime method. It will work on any platform for which a JNI
- * implementation of "hrtlib" library is available.- * - * {@link TimerFactory} acts as the Factory for this class.
- * - * MT-safety: an instance of this class is safe to be used within the same - * thread only. - * - * @author (C) Vlad Roubtsov, 2002 - */ -final class HRTimer 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 = getTime (); - } - - public void stop () - { - // latch stop time in a local var before doing anything else: - final double data = getTime (); - - 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: ............................................................... - - /* - * This is supposed to return a fractional count of milliseconds elapsed - * since some indeterminate moment in the past. The exact starting point - * is not relevant because this timer class reports time differences only. - * - * JNI code in HRTIMER_LIB library is supposed to implement this. */ - private static native double getTime (); - - - private int m_state; // used to keep track of timer state - private double m_data; // timing data - - private static final String HRTIMER_LIB = "hrtlib"; - - -} // end of class -// ---------------------------------------------------------------------------- diff --git a/timer/com/vladium/utils/timing/ITimer.java b/timer/com/vladium/utils/timing/ITimer.java deleted file mode 100644 index 98029b1..0000000 --- a/timer/com/vladium/utils/timing/ITimer.java +++ /dev/null @@ -1,54 +0,0 @@ - -package com.vladium.utils.timing; - -// ---------------------------------------------------------------------------- -/** - * A simple interface for measuring time intervals. An instance of this goes - * through the following lifecycle states: - *
- * - * If this library has been compiled with {@link ITimerConstants#DO_STATE_CHECKS} - * set to 'true' the implementation will enforce this lifecycle model and throw - * IllegalStateException when it is violated. - * - * @author (C) Vlad Roubtsov, 2002 - */ -public interface ITimer -{ - // public: ................................................................ - - /** - * Starts a new time interval and advances this timer instance to 'started' - * state. This method can be called from 'ready' state only. */ - void start (); - - /** - * Terminates the current time interval and advances this timer instance to - * 'stopped' state. Interval duration will be available via - * {@link #getDuration()} method. This method can be called from 'started' - * state only. */ - void stop (); - - /** - * Returns the duration of the time interval that elapsed between the last - * calls to {@link #start()} and {@link #stop()}. This method can be called - * any number of times from 'stopped' state and will return the same value - * each time.
- *
* @return interval duration in milliseconds
*/
- double getDuration ();
-
- /**
- * This method can be called from any state and will reset this timer
- * instance back to 'ready' state.
*/
- void reset ();
-
-} // end of interface
-// ----------------------------------------------------------------------------
diff --git a/timer/com/vladium/utils/timing/ITimerConstants.java b/timer/com/vladium/utils/timing/ITimerConstants.java
deleted file mode 100644
index 29435ae..0000000
--- a/timer/com/vladium/utils/timing/ITimerConstants.java
+++ /dev/null
@@ -1,31 +0,0 @@
-
-package com.vladium.utils.timing;
-
-// ----------------------------------------------------------------------------
-/**
- * A package-private collection of constants used by {@link ITimer} implementations
- * in HRTimer and JavaSystemTimer classes.
- *
- * @author (C) Vlad Roubtsov, 2002
- */
-interface ITimerConstants
-{
- // public: ................................................................
-
- /**
- * Conditional compilation flag to enable/disable state checking in timer
- * implementations. Just about the only reason you might want to disable
- * this is to reduce the timer overhead, but in practice the gain is very
- * small.
*/
- static final boolean DO_STATE_CHECKS = true;
-
- /**
- * Timer state enumeration.
*/
- static final int STATE_READY = 0, STATE_STARTED = 1, STATE_STOPPED = 2;
-
- /**
- * User-friendly timer state names indexed by their state values.
*/
- static final String [] STATE_NAMES = {"READY", "STARTED", "STOPPED"};
-
-} // end of interface
-// ----------------------------------------------------------------------------
diff --git a/timer/com/vladium/utils/timing/JavaSystemTimer.java b/timer/com/vladium/utils/timing/JavaSystemTimer.java
deleted file mode 100644
index e3f3b48..0000000
--- a/timer/com/vladium/utils/timing/JavaSystemTimer.java
+++ /dev/null
@@ -1,74 +0,0 @@
-
-package com.vladium.utils.timing;
-
-// ----------------------------------------------------------------------------
-/**
- * A package-private implementation of {@link ITimer} based around Java system
- * timer [System.currentTimeMillis() method]. It is used when
- * HRTimer implementation is unavailable.
- * - * {@link TimerFactory} acts as the Factory for this class.
- *
- * MT-safety: an instance of this class is safe to be used within the same
- * thread only.
- *
- * @author (C) Vlad Roubtsov, 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
-// ----------------------------------------------------------------------------
diff --git a/timer/com/vladium/utils/timing/TimerFactory.java b/timer/com/vladium/utils/timing/TimerFactory.java
deleted file mode 100644
index ae127c5..0000000
--- a/timer/com/vladium/utils/timing/TimerFactory.java
+++ /dev/null
@@ -1,74 +0,0 @@
-
-package com.vladium.utils.timing;
-
-// ----------------------------------------------------------------------------
-/**
- * This non-instantiable non-extendible class acts as a Factory for {@link ITimer}
- * implementations.
- *
- * @author (C) Vlad Roubtsov, 2002
- */
-public abstract class TimerFactory
-{
- // public: ................................................................
-
- private static final String HRTIMER_LIB = "hrtlib";
-
- /**
- * Creates a new instance of {@link ITimer} which is returned in 'ready'
- * state. If the JNI-based/high-resolution implementation is not available
- * this will return an instance of JavaSystemTimer, so this
- * method is guaranteed not to fail.
- *
- * @return ITimer a new timer instance in 'ready' state [never null]
*/
-
- public static void initialize(String path) {
-
- UnsatisfiedLinkError exception = null;
-
- try {
- System.loadLibrary (HRTIMER_LIB);
- } catch (UnsatisfiedLinkError e) {
- if(path != null) {
- try {
- System.load(path);
- } catch (UnsatisfiedLinkError ex) {
- exception = ex;
- }
- } else {
- exception = e;
- }
- }
-
- if(exception != null) {
- System.out.println ("native lib '" + HRTIMER_LIB
- + "' not found in 'java.library.path': "
- + System.getProperty ("java.library.path")
- +path==null?"":(" or in "+path));
-
- throw exception; // re-throw
- }
- }
-
- public static ITimer newTimer ()
- {
-// try
-// {
- return new HRTimer ();
-// }
-// catch (Throwable t)
-// {
-// return new JavaSystemTimer ();
-// }
- }
-
- // protected: .............................................................
-
- // package: ...............................................................
-
- // private: ...............................................................
-
- private TimerFactory () {} // prevent subclassing
-
-} // end of class
-// ----------------------------------------------------------------------------
diff --git a/timer/native/com_vladium_utils_timing_HRTimer.c b/timer/native/com_vladium_utils_timing_HRTimer.c
deleted file mode 100644
index 647837d..0000000
--- a/timer/native/com_vladium_utils_timing_HRTimer.c
+++ /dev/null
@@ -1,71 +0,0 @@
-/* ------------------------------------------------------------------------- */
-/*
- * A win32 implementation of JNI methods in com.vladium.utils.timing.HRTimer
- * class. The author compiled it using Microsoft Visual C++ but the code
- * should be easy to use with any compiler for win32 platform.
- *
- * For simplicity, this implementaion assumes JNI 1.2+ and omits error handling.
- *
- * (C) 2002, Vladimir Roubtsov [vroubtsov@illinoisalumni.org]
- */
-/* ------------------------------------------------------------------------- */
-
-#if !defined NDEBUG
-#include