/*
* This file is part of the Jikes RVM project (http://jikesrvm.org).
*
* This file is licensed to You under the Eclipse Public License (EPL);
* You may not use this file except in compliance with the License. You
* may obtain a copy of the License at
*
* http://www.opensource.org/licenses/eclipse-1.0.php
*
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership.
*/
package org.mmtk.plan;
import org.mmtk.utility.Log;
import org.mmtk.vm.VM;
import org.vmmagic.pragma.*;
/**
* This class (and its sub-classes) implement <i>per-collector thread</i>
* behavior and state.
*
* MMTk assumes that the VM instantiates instances of CollectorContext
* in thread local storage (TLS) for each thread participating in
* collection. Accesses to this state are therefore assumed to be
* low-cost during mutator time.<p>
*
* @see CollectorContext
*/
@Uninterruptible
public abstract class StopTheWorldCollector extends SimpleCollector {
/****************************************************************************
*
* Collection.
*/
/** Perform garbage collection */
public void collect() {
Phase.beginNewPhaseStack(Phase.scheduleComplex(global().collection));
}
/** Perform some concurrent garbage collection */
public final void concurrentCollect() {
VM.assertions.fail("concurrentCollect called on StopTheWorld collector");
}
/**
* Perform some concurrent collection work.
*
* @param phaseId The unique phase identifier
*/
public void concurrentCollectionPhase(short phaseId) {
VM.assertions.fail("concurrentCollectionPhase triggered on StopTheWorld collector");
}
/****************************************************************************
*
* Miscellaneous.
*/
/** @return The active global plan as a <code>StopTheWorld</code> instance. */
@Inline
private static StopTheWorld global() {
return (StopTheWorld) VM.activePlan.global();
}
}