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8139307: Remove sun.misc.ConditionLock and Lock

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Reviewed-by: alanb, lancea, martin, mchung, shade, smarks
This commit is contained in:
Chris Hegarty 2015-10-10 17:27:10 +01:00
parent 2e0d7b61ee
commit 37935fc4a0
2 changed files with 0 additions and 175 deletions
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82
jdk/src/java.base/share/classes/sun/misc/ConditionLock.java
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@ -1,82 +0,0 @@
/*
* Copyright (c) 1994, 2005, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.misc;
/**
* ConditionLock is a Lock with a built in state variable. This class
* provides the ability to wait for the state variable to be set to a
* desired value and then acquire the lock.<p>
*
* The lockWhen() and unlockWith() methods can be safely intermixed
* with the lock() and unlock() methods. However if there is a thread
* waiting for the state variable to become a particular value and you
* simply call Unlock(), that thread will not be able to acquire the
* lock until the state variable equals its desired value.
*
* @author Peter King
*/
public final
class ConditionLock extends Lock {
private int state = 0;
/**
* Creates a ConditionLock.
*/
public ConditionLock () {
}
/**
* Creates a ConditionLock in an initialState.
*/
public ConditionLock (int initialState) {
state = initialState;
}
/**
* Acquires the lock when the state variable equals the desired state.
*
* @param desiredState the desired state
* @exception java.lang.InterruptedException if any thread has
* interrupted this thread.
*/
public synchronized void lockWhen(int desiredState)
throws InterruptedException
{
while (state != desiredState) {
wait();
}
lock();
}
/**
* Releases the lock, and sets the state to a new value.
* @param newState the new state
*/
public synchronized void unlockWith(int newState) {
state = newState;
unlock();
}
}

93
jdk/src/java.base/share/classes/sun/misc/Lock.java
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@ -1,93 +0,0 @@
/*
* Copyright (c) 1994, 2005, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.misc;
/**
* The Lock class provides a simple, useful interface to a lock.
* Unlike monitors which synchronize access to an object, locks
* synchronize access to an arbitrary set of resources (objects,
* methods, variables, etc.). <p>
*
* The programmer using locks must be responsible for clearly defining
* the semantics of their use and should handle deadlock avoidance in
* the face of exceptions. <p>
*
* For example, if you want to protect a set of method invocations with
* a lock, and one of the methods may throw an exception, you must be
* prepared to release the lock similarly to the following example:
* <pre>
* class SomeClass {
* Lock myLock = new Lock();
* void someMethod() {
* myLock.lock();
* try {
* StartOperation();
* ContinueOperation();
* EndOperation();
* } finally {
* myLock.unlock();
* }
* }
* }
* </pre>
*
* @author Peter King
*/
public
class Lock {
private boolean locked = false;
/**
* Create a lock, which is initially not locked.
*/
public Lock () {
}
/**
* Acquire the lock. If someone else has the lock, wait until it
* has been freed, and then try to acquire it again. This method
* will not return until the lock has been acquired.
*
* @exception java.lang.InterruptedException if any thread has
* interrupted this thread.
*/
public final synchronized void lock() throws InterruptedException {
while (locked) {
wait();
}
locked = true;
}
/**
* Release the lock. If someone else is waiting for the lock, the
* will be notitified so they can try to acquire the lock again.
*/
public final synchronized void unlock() {
locked = false;
notifyAll();
}
}