/*
File: WaitableInt.java
Originally written by Doug Lea and released into the public domain.
This may be used for any purposes whatsoever without acknowledgment.
Thanks for the assistance and support of Sun Microsystems Labs,
and everyone contributing, testing, and using this code.
History:
Date Who What
23Jun1998 dl Create public version
13may2004 dl Add notifying bit ops
*/
package com.alipay.zdal.datasource.resource.util.concurrent;
/**
* A class useful for offloading waiting and signalling operations
* on single int variables.
* <p>
* <p>[<a href="http://gee.cs.oswego.edu/dl/classes/EDU/oswego/cs/dl/util/concurrent/intro.html"> Introduction to this package. </a>]
**/
public class WaitableInt extends SynchronizedInt {
/**
* Make a new WaitableInt with the given initial value,
* and using its own internal lock.
**/
public WaitableInt(int initialValue) {
super(initialValue);
}
/**
* Make a new WaitableInt with the given initial value,
* and using the supplied lock.
**/
public WaitableInt(int initialValue, Object lock) {
super(initialValue, lock);
}
@Override
public int set(int newValue) {
synchronized (lock_) {
lock_.notifyAll();
return super.set(newValue);
}
}
@Override
public boolean commit(int assumedValue, int newValue) {
synchronized (lock_) {
boolean success = super.commit(assumedValue, newValue);
if (success)
lock_.notifyAll();
return success;
}
}
@Override
public int increment() {
synchronized (lock_) {
lock_.notifyAll();
return super.increment();
}
}
@Override
public int decrement() {
synchronized (lock_) {
lock_.notifyAll();
return super.decrement();
}
}
@Override
public int add(int amount) {
synchronized (lock_) {
lock_.notifyAll();
return super.add(amount);
}
}
@Override
public int subtract(int amount) {
synchronized (lock_) {
lock_.notifyAll();
return super.subtract(amount);
}
}
@Override
public int multiply(int factor) {
synchronized (lock_) {
lock_.notifyAll();
return super.multiply(factor);
}
}
@Override
public int divide(int factor) {
synchronized (lock_) {
lock_.notifyAll();
return super.divide(factor);
}
}
/**
* Set the value to its complement
* @return the new value
**/
@Override
public int complement() {
synchronized (lock_) {
value_ = ~value_;
lock_.notifyAll();
return value_;
}
}
/**
* Set value to value & b.
* @return the new value
**/
@Override
public int and(int b) {
synchronized (lock_) {
value_ = value_ & b;
lock_.notifyAll();
return value_;
}
}
/**
* Set value to value | b.
* @return the new value
**/
@Override
public int or(int b) {
synchronized (lock_) {
value_ = value_ | b;
lock_.notifyAll();
return value_;
}
}
/**
* Set value to value ^ b.
* @return the new value
**/
@Override
public int xor(int b) {
synchronized (lock_) {
value_ = value_ ^ b;
lock_.notifyAll();
return value_;
}
}
/**
* Wait until value equals c, then run action if nonnull.
* The action is run with the synchronization lock held.
**/
public void whenEqual(int c, Runnable action) throws InterruptedException {
synchronized (lock_) {
while (!(value_ == c))
lock_.wait();
if (action != null)
action.run();
}
}
/**
* wait until value not equal to c, then run action if nonnull.
* The action is run with the synchronization lock held.
**/
public void whenNotEqual(int c, Runnable action) throws InterruptedException {
synchronized (lock_) {
while (!(value_ != c))
lock_.wait();
if (action != null)
action.run();
}
}
/**
* wait until value less than or equal to c, then run action if nonnull.
* The action is run with the synchronization lock held.
**/
public void whenLessEqual(int c, Runnable action) throws InterruptedException {
synchronized (lock_) {
while (!(value_ <= c))
lock_.wait();
if (action != null)
action.run();
}
}
/**
* wait until value less than c, then run action if nonnull.
* The action is run with the synchronization lock held.
**/
public void whenLess(int c, Runnable action) throws InterruptedException {
synchronized (lock_) {
while (!(value_ < c))
lock_.wait();
if (action != null)
action.run();
}
}
/**
* wait until value greater than or equal to c, then run action if nonnull.
* The action is run with the synchronization lock held.
**/
public void whenGreaterEqual(int c, Runnable action) throws InterruptedException {
synchronized (lock_) {
while (!(value_ >= c))
lock_.wait();
if (action != null)
action.run();
}
}
/**
* wait until value greater than c, then run action if nonnull.
* The action is run with the synchronization lock held.
**/
public void whenGreater(int c, Runnable action) throws InterruptedException {
synchronized (lock_) {
while (!(value_ > c))
lock_.wait();
if (action != null)
action.run();
}
}
}