/******************************************************************************
* Copyright (c) 2009 - 2015 IBM Corporation.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*****************************************************************************/
/**
*
*/
package data.causality;
/**
* Causality test case 7 from
* http://www.cs.umd.edu/~pugh/java/memoryModel/CausalityTestCases.html
*
* <pre>
* Initially, x = y = z = 0
*
* Thread 1:
* r1 = z
* r2 = x
* y = r2
*
* Thread 2:
* r3 = y
* z = r3
* x = 1
*
* Behavior in question: r1 = r2 = r3 = 1.
*
* Decision: Allowed. Intrathread transformations could move r1 = z to
* after the last statement in thread 1, and x = 1 to before the
* first statement in thread 2.
* </pre>
*
* @author etorlak
*
*/
public final class Test07 {
static int x = 0, y = 0, z = 0;
public static final void thread1() {
final int r1 = z;
final int r2 = x;
y = r2;
assert r1==1;
assert r2==1;
}
public static final void thread2() {
final int r3 = y;
z = r3;
x = 1;
assert r3==1;
}
}