/*
* Copyright (c) 2010, 2011, 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.
*
* 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
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*/
package com.sun.max.vm.run.java;
import com.sun.max.unsafe.*;
import com.sun.max.vm.heap.*;
import com.sun.max.vm.heap.HeapScheme.GCRequest;
import com.sun.max.vm.thread.*;
/**
* A daemon thread that calls {@link Heap#collectGarbage(Size)} periodically.
*/
class ExcessiveGCDaemon extends Thread {
private final int frequency;
/**
* Creates a daemon thread that calls {@link Heap#collectGarbage(Size)} every {@code frequency} milliseconds.
*/
public ExcessiveGCDaemon(int frequency) {
super("ExcessiveGCDaemon");
setDaemon(true);
this.frequency = frequency;
}
@Override
public void run() {
final GCRequest gcRequest = VmThread.current().gcRequest;
while (true) {
try {
Thread.sleep(frequency);
// FIXME: should use a different flag to distinguish these "forced" GC from actual Runtime.gc call.
gcRequest.explicit = true;
Heap.collectGarbage();
} catch (InterruptedException e) {
}
}
}
}