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244 lines (206 loc) · 6.82 KB
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/*
* Copyright 1997-2008 Sun Microsystems, Inc. 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. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
*/
package org.scijava.java3d;
import java.util.logging.Level;
class BehaviorScheduler extends J3dThread {
/**
* The virtual universe that owns this BehaviorScheduler
*/
VirtualUniverse univ = null;
// reference to behaviourStructure processList
UnorderList processList[];
// reference to scheduleList;
IndexedUnorderSet scheduleList;
// reference to universe.behaviorStructure
BehaviorStructure behaviorStructure;
// A count for BehaviorScheduler start/stop
int stopCount = -1;
/**
* These are used for start/stop BehaviorScheduler
*/
long lastStartTime;
long lastStopTime;
// lock to ensure consistency of interval values read
Object intervalTimeLock = new Object();
/**
* Some variables used to name threads correctly
*/
private static int numInstances = 0;
private int instanceNum = -1;
private synchronized int newInstanceNum() {
return (++numInstances);
}
@Override
int getInstanceNum() {
if (instanceNum == -1)
instanceNum = newInstanceNum();
return instanceNum;
}
BehaviorScheduler(ThreadGroup t, VirtualUniverse universe) {
super(t);
setName("J3D-BehaviorScheduler-" + getInstanceNum());
this.univ = universe;
behaviorStructure = universe.behaviorStructure;
scheduleList = behaviorStructure.scheduleList;
processList = behaviorStructure.processList;
type = J3dThread.BEHAVIOR_SCHEDULER;
}
void stopBehaviorScheduler(long[] intervalTime) {
stopCount = 2;
VirtualUniverse.mc.sendRunMessage(univ, J3dThread.BEHAVIOR_SCHEDULER);
while (!userStop ) {
MasterControl.threadYield();
}
synchronized (intervalTimeLock) {
intervalTime[0] = lastStartTime;
intervalTime[1] = lastStopTime;
}
}
void startBehaviorScheduler() {
// don't allow scheduler start until intervalTime is read
synchronized (intervalTimeLock) {
stopCount = -1;
userStop = false;
VirtualUniverse.mc.setWork();
}
}
void deactivate() {
active = false;
if (stopCount >= 0) {
userStop = true;
}
}
/**
* The main loop for the Behavior Scheduler.
* Main method for firing off vector of satisfied conditions that
* are contained in the condMet vector. Method is synchronized
* because it is modifying the current wakeup vectors in the
* clean (emptying out satisfied conditions) and processStimulus
* (adding conditions again if wakeupOn called) calls.
*/
@Override
void doWork(long referenceTime) {
BehaviorRetained arr[];
UnorderList list;
int i, size, interval;
lastStartTime = J3dClock.currentTimeMillis();
if (stopCount >= 0) {
VirtualUniverse.mc.sendRunMessage(univ, J3dThread.BEHAVIOR_SCHEDULER);
if (--stopCount == 0) {
userStop = true;
}
}
for (interval = 0;
interval < BehaviorRetained.NUM_SCHEDULING_INTERVALS;
interval++) {
list = processList[interval];
if (list.isEmpty()) {
continue;
}
arr = (BehaviorRetained []) list.toArray(false);
size = list.arraySize();
for (i = 0; i < size ; i++) {
BehaviorRetained behavret = arr[i];
synchronized (behavret) {
Behavior behav = (Behavior) behavret.source;
if (!behav.isLive() ||
!behavret.conditionSet ||
(behavret.wakeupCondition == null)) {
continue;
}
if (behavret.wakeupCondition.trigEnum == null) {
behavret.wakeupCondition.trigEnum =
new WakeupCriteriaEnumerator(behavret.wakeupCondition,
WakeupCondition.TRIGGERED_ELEMENTS);
} else {
behavret.wakeupCondition.trigEnum.reset(
behavret.wakeupCondition,
WakeupCondition.TRIGGERED_ELEMENTS);
}
// BehaviorRetained now cache the old
// wakeupCondition in order to
// reuse it without the heavyweight cleanTree()
// behavret.wakeupCondition.cleanTree();
behavret.conditionSet = false;
WakeupCondition wakeupCond = behavret.wakeupCondition;
synchronized (behavret) {
behavret.inCallback = true;
univ.inBehavior = true;
try {
behav.processStimulus(wakeupCond.trigEnum);
}
catch (RuntimeException e) {
// Force behavior condition to be unset
// Issue 21: don't call cleanTree here
behavret.conditionSet = false;
System.err.println("Exception occurred during Behavior execution:");
e.printStackTrace();
}
catch (Error e) {
// Force behavior condition to be unset
// Fix for issue 264
behavret.conditionSet = false;
System.err.println("Error occurred during Behavior execution:");
e.printStackTrace();
}
univ.inBehavior = false;
behavret.inCallback = false;
}
// note that if the behavior wasn't reset, we need to make the
// wakeupcondition equal to null
if (behavret.conditionSet == false) {
if (wakeupCond != null) {
wakeupCond.cleanTree(behaviorStructure);
}
behavret.wakeupCondition = null;
behavret.active = false;
scheduleList.remove(behavret);
} else {
behavret.handleLastWakeupOn(wakeupCond,
behaviorStructure);
}
}
}
list.clear();
}
behaviorStructure.handleAWTEvent();
behaviorStructure.handleBehaviorPost();
lastStopTime = J3dClock.currentTimeMillis();
if (MasterControl.isStatsLoggable(Level.FINE)) {
VirtualUniverse.mc.recordTime(MasterControl.TimeType.BEHAVIOR, (lastStopTime-lastStartTime)*1000000);
}
}
void free() {
behaviorStructure = null;
getThreadData(null, null).thread = null;
univ = null;
for (int i=BehaviorRetained.NUM_SCHEDULING_INTERVALS-1;
i >= 0; i--) {
processList[i].clear();
}
scheduleList.clear();
}
}