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Java™ Binding for the OpenGL® API
/**
* Copyright 2010 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*/
package jogamp.opengl;
import java.util.Collection;
import java.util.HashSet;
import java.util.Iterator;
import javax.media.nativewindow.AbstractGraphicsDevice;
import javax.media.nativewindow.AbstractGraphicsScreen;
import com.jogamp.opengl.GLRendererQuirks;
public class SharedResourceRunner implements Runnable {
protected static final boolean DEBUG = GLDrawableImpl.DEBUG;
public static interface Resource {
boolean isValid();
AbstractGraphicsDevice getDevice();
AbstractGraphicsScreen getScreen();
GLDrawableImpl getDrawable();
GLContextImpl getContext();
GLRendererQuirks getRendererQuirks();
}
public static interface Implementation {
/**
* @param connection for creation a {@link AbstractGraphicsDevice} instance.
* @return true if the device supports all protocols required for the implementation, otherwise false.
*/
boolean isDeviceSupported(String connection);
/**
* @param connection for creation a {@link AbstractGraphicsDevice} instance.
* @return A new shared resource instance
*/
Resource createSharedResource(String connection);
void releaseSharedResource(Resource shared);
void clear();
Resource mapPut(String connection, Resource resource);
Resource mapGet(String connection);
Collection mapValues();
}
final HashSet devicesTried = new HashSet();
final Implementation impl;
Thread thread;
boolean ready;
boolean released;
boolean shouldRelease;
String initConnection;
String releaseConnection;
private boolean getDeviceTried(String connection) {
synchronized (devicesTried) {
return devicesTried.contains(connection);
}
}
private void addDeviceTried(String connection) {
synchronized (devicesTried) {
devicesTried.add(connection);
}
}
private void removeDeviceTried(String connection) {
synchronized (devicesTried) {
devicesTried.remove(connection);
}
}
public SharedResourceRunner(Implementation impl) {
this.impl = impl;
resetState();
}
private void resetState() {
devicesTried.clear();
thread = null;
ready = false;
released = false;
shouldRelease = false;
initConnection = null;
releaseConnection = null;
}
/**
* Start the shared resource runner thread, if not running.
*
* Validate the thread upfront and release all related resource if it was killed.
*
*
* @return the shared resource runner thread.
*/
public Thread start() {
if(null != thread && !thread.isAlive()) {
// thread was killed unrecognized ..
if (DEBUG) {
System.err.println("SharedResourceRunner.start() - dead-old-thread cleanup - "+getThreadName());
}
releaseSharedResources();
thread = null;
}
if(null == thread) {
if (DEBUG) {
System.err.println("SharedResourceRunner.start() - start new Thread - "+getThreadName());
}
resetState();
thread = new Thread(this, getThreadName()+"-SharedResourceRunner");
thread.setDaemon(true); // Allow JVM to exit, even if this one is running
thread.start();
}
return thread;
}
public void stop() {
if(null != thread) {
if (DEBUG) {
System.err.println("SharedResourceRunner.stop() - "+getThreadName());
}
synchronized (this) {
shouldRelease = true;
this.notifyAll();
while (!released) {
try {
this.wait();
} catch (InterruptedException ex) {
}
}
}
}
}
public SharedResourceRunner.Resource getOrCreateShared(AbstractGraphicsDevice device) {
SharedResourceRunner.Resource sr = null;
if(null != device) {
start();
final String connection = device.getConnection();
sr = impl.mapGet(connection);
if (null == sr && !getDeviceTried(connection)) {
addDeviceTried(connection);
if (DEBUG) {
System.err.println("SharedResourceRunner.getOrCreateShared() " + connection + ": trying - "+getThreadName());
}
if ( impl.isDeviceSupported(connection) ) {
doAndWait(connection, null);
sr = impl.mapGet(connection);
}
if (DEBUG) {
System.err.println("SharedResourceRunner.getOrCreateShared() " + connection + ": "+ ( ( null != sr ) ? "success" : "failed" ) +" - "+getThreadName());
}
}
}
return sr;
}
public SharedResourceRunner.Resource releaseShared(AbstractGraphicsDevice device) {
SharedResourceRunner.Resource sr = null;
if(null != device) {
String connection = device.getConnection();
sr = impl.mapGet(connection);
if (null != sr) {
removeDeviceTried(connection);
if (DEBUG) {
System.err.println("SharedResourceRunner.releaseShared() " + connection + ": trying - "+getThreadName());
}
doAndWait(null, connection);
if (DEBUG) {
System.err.println("SharedResourceRunner.releaseShared() " + connection + ": done - "+getThreadName());
}
}
}
return sr;
}
private final void doAndWait(String initConnection, String releaseConnection) {
// wait until thread becomes ready to init new device,
// pass the device and release the sync
final String threadName = getThreadName();
if (DEBUG) {
System.err.println("SharedResourceRunner.doAndWait() START init: " + initConnection + ", release: "+releaseConnection+" - "+threadName);
}
synchronized (this) {
while (!ready) {
try {
this.wait();
} catch (InterruptedException ex) {
}
}
if (DEBUG) {
System.err.println("SharedResourceRunner.doAndWait() set command: " + initConnection + ", release: "+releaseConnection+" - "+threadName);
}
this.initConnection = initConnection;
this.releaseConnection = releaseConnection;
this.notifyAll();
// wait until thread has init/released the device
while (!ready || null != this.initConnection || null != this.releaseConnection) {
try {
this.wait();
} catch (InterruptedException ex) {
}
}
if (DEBUG) {
System.err.println("SharedResourceRunner.initializeAndWait END init: " + initConnection + ", release: "+releaseConnection+" - "+threadName);
}
}
// done
}
public final void run() {
final String threadName = getThreadName();
if (DEBUG) {
System.err.println("SharedResourceRunner.run(): STARTED - " + threadName);
}
synchronized (this) {
while (!shouldRelease) {
try {
// wait for stop or init
ready = true;
if (DEBUG) {
System.err.println("SharedResourceRunner.run(): READY - " + threadName);
}
notifyAll();
this.wait();
} catch (InterruptedException ex) {
shouldRelease = true;
if(DEBUG) {
System.err.println("SharedResourceRunner.run(): INTERRUPTED - "+threadName);
ex.printStackTrace();
}
}
ready = false;
if (!shouldRelease) {
if (DEBUG) {
System.err.println("SharedResourceRunner.run(): WOKE UP for device connection init: " + initConnection +
", release: " + releaseConnection + " - " + threadName);
}
if(null != initConnection) {
if (DEBUG) {
System.err.println("SharedResourceRunner.run(): create Shared for: " + initConnection + " - " + threadName);
}
Resource sr = null;
try {
sr = impl.createSharedResource(initConnection);
} catch (Exception e) {
e.printStackTrace();
}
if (null != sr) {
impl.mapPut(initConnection, sr);
}
}
if(null != releaseConnection) {
if (DEBUG) {
System.err.println("SharedResourceRunner.run(): release Shared for: " + releaseConnection + " - " + threadName);
}
Resource sr = impl.mapGet(releaseConnection);
if (null != sr) {
try {
impl.releaseSharedResource(sr);
impl.mapPut(releaseConnection, null);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
initConnection = null;
releaseConnection = null;
}
if (DEBUG) {
System.err.println("SharedResourceRunner.run(): RELEASE START - " + threadName);
}
releaseSharedResources();
if (DEBUG) {
System.err.println("SharedResourceRunner.run(): RELEASE END - " + threadName);
}
shouldRelease = false;
released = true;
thread = null;
notifyAll();
}
}
private void releaseSharedResources() {
synchronized (devicesTried) {
devicesTried.clear();
}
Collection sharedResources = impl.mapValues();
for (Iterator iter = sharedResources.iterator(); iter.hasNext();) {
try {
impl.releaseSharedResource(iter.next());
} catch (Throwable t) {
System.err.println("Catched Exception on thread "+getThreadName());
t.printStackTrace();
}
}
impl.clear();
}
protected static String getThreadName() { return Thread.currentThread().getName(); }
}
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