org.cliffc.high_scale_lib.Counter Maven / Gradle / Ivy
/*
* Written by Cliff Click and released to the public domain, as explained at
* http://creativecommons.org/licenses/publicdomain
*/
package org.cliffc.high_scale_lib;
/**
* A simple high-performance counter. Merely renames the extended {@link
* org.cliffc.high_scale_lib.ConcurrentAutoTable} class to be more obvious.
* {@link org.cliffc.high_scale_lib.ConcurrentAutoTable} already has a decent
* counting API.
*
* @since 1.5
* @author Cliff Click
*/
public class Counter extends ConcurrentAutoTable {
// Add the given value to current counter value. Concurrent updates will
// not be lost, but addAndGet or getAndAdd are not implemented because but
// the total counter value is not atomically updated.
//public void add( long x );
//public void decrement();
//public void increment();
// Current value of the counter. Since other threads are updating furiously
// the value is only approximate, but it includes all counts made by the
// current thread. Requires a pass over all the striped counters.
//public long get();
//public int intValue();
//public long longValue();
// A cheaper 'get'. Updated only once/millisecond, but fast as a simple
// load instruction when not updating.
//public long estimate_get( );
}