/*
***** BEGIN LICENSE BLOCK *****
* Version: EPL 1.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Eclipse Public
* License Version 1.0 (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.eclipse.org/legal/epl-v10.html
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the EPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the EPL, the GPL or the LGPL.
***** END LICENSE BLOCK *****/
package org.jruby.runtime.opto;
import java.lang.invoke.SwitchPoint;
import java.util.List;
public class SwitchPointInvalidator implements Invalidator {
// a dummy switchpoint to use until we actually need a real one
private static final SwitchPoint DUMMY = new SwitchPoint();
static {SwitchPoint.invalidateAll(new SwitchPoint[]{DUMMY});}
private volatile SwitchPoint switchPoint = DUMMY;
public synchronized void invalidate() {
if (switchPoint == DUMMY) return;
SwitchPoint.invalidateAll(new SwitchPoint[]{switchPoint});
switchPoint = new SwitchPoint();
}
public void invalidateAll(List<Invalidator> invalidators) {
SwitchPoint[] switchPoints = new SwitchPoint[invalidators.size()];
for (int i = 0; i < invalidators.size(); i++) {
Invalidator invalidator = invalidators.get(i);
assert invalidator instanceof SwitchPointInvalidator;
switchPoints[i] = ((SwitchPointInvalidator)invalidator).replaceSwitchPoint();
}
SwitchPoint.invalidateAll(switchPoints);
}
public synchronized Object getData() {
return switchPoint == DUMMY ? switchPoint = new SwitchPoint() : switchPoint;
}
public synchronized SwitchPoint replaceSwitchPoint() {
if (switchPoint == DUMMY) return switchPoint;
SwitchPoint oldSwitchPoint = switchPoint;
switchPoint = new SwitchPoint();
return oldSwitchPoint;
}
}