com.gemstone.gemfire.internal.concurrent.AB Maven / Gradle / Ivy
/*
* Copyright (c) 2010-2015 Pivotal Software, Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you
* may not use this file except in compliance with the License. You
* may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied. See the License for the specific language governing
* permissions and limitations under the License. See accompanying
* LICENSE file.
*/
package com.gemstone.gemfire.internal.concurrent;
/**
* These methods are the same ones on
* the JDK 5 version java.util.concurrent.atomic.AtomicBoolean.
* @see CFactory
* @author darrel
* @deprecated used AtomicBoolean instead
*/
public interface AB {
/**
* Returns the current value.
*
* @return the current value
*/
public boolean get();
/**
* Atomically sets the value to the given updated value
* if the current value {@code ==} the expected value.
*
* @param expect the expected value
* @param update the new value
* @return true if successful. False return indicates that
* the actual value was not equal to the expected value.
*/
public boolean compareAndSet(boolean expect, boolean update);
/**
* Atomically sets the value to the given updated value
* if the current value {@code ==} the expected value.
*
* May fail spuriously
* and does not provide ordering guarantees, so is only rarely an
* appropriate alternative to {@code compareAndSet}.
*
* @param expect the expected value
* @param update the new value
* @return true if successful.
*/
public boolean weakCompareAndSet(boolean expect, boolean update);
/**
* Unconditionally sets to the given value.
*
* @param newValue the new value
*/
public void set(boolean newValue);
/**
* Atomically sets to the given value and returns the previous value.
*
* @param newValue the new value
* @return the previous value
*/
public boolean getAndSet(boolean newValue);
}