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Merge pull request #533 from empirephoenix/master

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BufferAllocator Round 2
This commit is contained in:
Kirill Vainer 2016-07-26 10:28:48 -04:00 committed by GitHub
commit 651753c4d3
4 changed files with 321 additions and 178 deletions
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12
jme3-core/src/main/java/com/jme3/util/BufferAllocator.java Normal file
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@ -0,0 +1,12 @@
package com.jme3.util;
import java.nio.Buffer;
import java.nio.ByteBuffer;
public interface BufferAllocator {
void destroyDirectBuffer(Buffer toBeDestroyed);
ByteBuffer allocate(int size);
}

302
jme3-core/src/main/java/com/jme3/util/BufferUtils.java
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@ -31,17 +31,10 @@
*/
package com.jme3.util;
import com.jme3.math.ColorRGBA;
import com.jme3.math.Quaternion;
import com.jme3.math.Vector2f;
import com.jme3.math.Vector3f;
import com.jme3.math.Vector4f;
import java.io.UnsupportedEncodingException;
import java.lang.ref.PhantomReference;
import java.lang.ref.Reference;
import java.lang.ref.ReferenceQueue;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
@ -51,8 +44,12 @@ import java.nio.IntBuffer;
import java.nio.LongBuffer;
import java.nio.ShortBuffer;
import java.util.concurrent.ConcurrentHashMap;
import java.util.logging.Level;
import java.util.logging.Logger;
import com.jme3.math.ColorRGBA;
import com.jme3.math.Quaternion;
import com.jme3.math.Vector2f;
import com.jme3.math.Vector3f;
import com.jme3.math.Vector4f;
/**
* <code>BufferUtils</code> is a helper class for generating nio buffers from
@ -62,27 +59,52 @@ import java.util.logging.Logger;
* @version $Id: BufferUtils.java,v 1.16 2007/10/29 16:56:18 nca Exp $
*/
public final class BufferUtils {
private static BufferAllocator allocator = new PrimitiveAllocator();
private static boolean trackDirectMemory = false;
private static ReferenceQueue<Buffer> removeCollected = new ReferenceQueue<Buffer>();
private static ConcurrentHashMap<BufferInfo, BufferInfo> trackedBuffers = new ConcurrentHashMap<BufferInfo, BufferInfo>();
static ClearReferences cleanupthread;
private static boolean used;
static {
try {
allocator = new ReflectionAllocator();
} catch (Throwable t) {
t.printStackTrace();
System.err.println("Error using ReflectionAllocator");
}
}
/**
* Set it to true if you want to enable direct memory tracking for debugging purpose.
* Default is false.
* To print direct memory usage use BufferUtils.printCurrentDirectMemory(StringBuilder store);
* @param enabled
* Warning! do only set this before JME is started!
*/
public static void setAllocator(BufferAllocator allocator) {
if (used) {
throw new IllegalStateException(
"An Buffer was already allocated, since it is quite likely that other dispose methods will create native dangling pointers or other fun things, this is forbidden to be changed at runtime");
}
BufferUtils.allocator = allocator;
}
/**
* Set it to true if you want to enable direct memory tracking for debugging
* purpose. Default is false. To print direct memory usage use
* BufferUtils.printCurrentDirectMemory(StringBuilder store);
*
* @param enabled
*/
public static void setTrackDirectMemoryEnabled(boolean enabled) {
trackDirectMemory = enabled;
}
/**
* Creates a clone of the given buffer. The clone's capacity is
* equal to the given buffer's limit.
* Creates a clone of the given buffer. The clone's capacity is equal to the
* given buffer's limit.
*
* @param buf The buffer to clone
* @param buf
* The buffer to clone
* @return The cloned buffer
*/
public static Buffer clone(Buffer buf) {
@ -102,55 +124,31 @@ public final class BufferUtils {
}
private static void onBufferAllocated(Buffer buffer) {
/**
* StackTraceElement[] stackTrace = new Throwable().getStackTrace(); int
* initialIndex = 0;
*
* for (int i = 0; i < stackTrace.length; i++){ if
* (!stackTrace[i].getClassName().equals(BufferUtils.class.getName())){
* initialIndex = i; break; } }
*
* int allocated = buffer.capacity(); int size = 0;
*
* if (buffer instanceof FloatBuffer){ size = 4; }else if (buffer
* instanceof ShortBuffer){ size = 2; }else if (buffer instanceof
* ByteBuffer){ size = 1; }else if (buffer instanceof IntBuffer){ size =
* 4; }else if (buffer instanceof DoubleBuffer){ size = 8; }
*
* allocated *= size;
*
* for (int i = initialIndex; i < stackTrace.length; i++){
* StackTraceElement element = stackTrace[i]; if
* (element.getClassName().startsWith("java")){ break; }
*
* try { Class clazz = Class.forName(element.getClassName()); if (i ==
* initialIndex){
* System.out.println(clazz.getSimpleName()+"."+element.getMethodName
* ()+"():" + element.getLineNumber() + " allocated " + allocated);
* }else{ System.out.println(" at " +
* clazz.getSimpleName()+"."+element.getMethodName()+"()"); } } catch
* (ClassNotFoundException ex) { } }
*/
used = true;
if (BufferUtils.trackDirectMemory) {
if (BufferUtils.cleanupthread == null) {
BufferUtils.cleanupthread = new ClearReferences();
BufferUtils.cleanupthread.start();
}
if (buffer instanceof ByteBuffer) {
BufferInfo info = new BufferInfo(ByteBuffer.class, buffer.capacity(), buffer, BufferUtils.removeCollected);
BufferInfo info = new BufferInfo(ByteBuffer.class, buffer.capacity(), buffer,
BufferUtils.removeCollected);
BufferUtils.trackedBuffers.put(info, info);
} else if (buffer instanceof FloatBuffer) {
BufferInfo info = new BufferInfo(FloatBuffer.class, buffer.capacity() * 4, buffer, BufferUtils.removeCollected);
BufferInfo info = new BufferInfo(FloatBuffer.class, buffer.capacity() * 4, buffer,
BufferUtils.removeCollected);
BufferUtils.trackedBuffers.put(info, info);
} else if (buffer instanceof IntBuffer) {
BufferInfo info = new BufferInfo(IntBuffer.class, buffer.capacity() * 4, buffer, BufferUtils.removeCollected);
BufferInfo info = new BufferInfo(IntBuffer.class, buffer.capacity() * 4, buffer,
BufferUtils.removeCollected);
BufferUtils.trackedBuffers.put(info, info);
} else if (buffer instanceof ShortBuffer) {
BufferInfo info = new BufferInfo(ShortBuffer.class, buffer.capacity() * 2, buffer, BufferUtils.removeCollected);
BufferInfo info = new BufferInfo(ShortBuffer.class, buffer.capacity() * 2, buffer,
BufferUtils.removeCollected);
BufferUtils.trackedBuffers.put(info, info);
} else if (buffer instanceof DoubleBuffer) {
BufferInfo info = new BufferInfo(DoubleBuffer.class, buffer.capacity() * 8, buffer, BufferUtils.removeCollected);
BufferInfo info = new BufferInfo(DoubleBuffer.class, buffer.capacity() * 8, buffer,
BufferUtils.removeCollected);
BufferUtils.trackedBuffers.put(info, info);
}
@ -158,11 +156,12 @@ public final class BufferUtils {
}
/**
* Generate a new FloatBuffer using the given array of Vector3f objects.
* The FloatBuffer will be 3 * data.length long and contain the vector data
* as data[0].x, data[0].y, data[0].z, data[1].x... etc.
* Generate a new FloatBuffer using the given array of Vector3f objects. The
* FloatBuffer will be 3 * data.length long and contain the vector data as
* data[0].x, data[0].y, data[0].z, data[1].x... etc.
*
* @param data array of Vector3f objects to place into a new FloatBuffer
* @param data
* array of Vector3f objects to place into a new FloatBuffer
*/
public static FloatBuffer createFloatBuffer(Vector3f... data) {
if (data == null) {
@ -184,7 +183,8 @@ public final class BufferUtils {
* Generate a new FloatBuffer using the given array of Quaternion objects.
* The FloatBuffer will be 4 * data.length long and contain the vector data.
*
* @param data array of Quaternion objects to place into a new FloatBuffer
* @param data
* array of Quaternion objects to place into a new FloatBuffer
*/
public static FloatBuffer createFloatBuffer(Quaternion... data) {
if (data == null) {
@ -203,10 +203,11 @@ public final class BufferUtils {
}
/**
* Generate a new FloatBuffer using the given array of Vector4 objects.
* The FloatBuffer will be 4 * data.length long and contain the vector data.
* Generate a new FloatBuffer using the given array of Vector4 objects. The
* FloatBuffer will be 4 * data.length long and contain the vector data.
*
* @param data array of Vector4 objects to place into a new FloatBuffer
* @param data
* array of Vector4 objects to place into a new FloatBuffer
*/
public static FloatBuffer createFloatBuffer(Vector4f... data) {
if (data == null) {
@ -228,7 +229,8 @@ public final class BufferUtils {
* Generate a new FloatBuffer using the given array of ColorRGBA objects.
* The FloatBuffer will be 4 * data.length long and contain the color data.
*
* @param data array of ColorRGBA objects to place into a new FloatBuffer
* @param data
* array of ColorRGBA objects to place into a new FloatBuffer
*/
public static FloatBuffer createFloatBuffer(ColorRGBA... data) {
if (data == null) {
@ -248,7 +250,9 @@ public final class BufferUtils {
/**
* Generate a new FloatBuffer using the given array of float primitives.
* @param data array of float primitives to place into a new FloatBuffer
*
* @param data
* array of float primitives to place into a new FloatBuffer
*/
public static FloatBuffer createFloatBuffer(float... data) {
if (data == null) {
@ -307,8 +311,7 @@ public final class BufferUtils {
* @param index
* the postion to place the data; in terms of colors not floats
*/
public static void setInBuffer(ColorRGBA color, FloatBuffer buf,
int index) {
public static void setInBuffer(ColorRGBA color, FloatBuffer buf, int index) {
buf.position(index * 4);
buf.put(color.r);
buf.put(color.g);
@ -317,18 +320,18 @@ public final class BufferUtils {
}
/**
* Sets the data contained in the given quaternion into the FloatBuffer at the
* specified index.
* Sets the data contained in the given quaternion into the FloatBuffer at
* the specified index.
*
* @param quat
* the {@link Quaternion} to insert
* @param buf
* the buffer to insert into
* @param index
* the position to place the data; in terms of quaternions not floats
* the position to place the data; in terms of quaternions not
* floats
*/
public static void setInBuffer(Quaternion quat, FloatBuffer buf,
int index) {
public static void setInBuffer(Quaternion quat, FloatBuffer buf, int index) {
buf.position(index * 4);
buf.put(quat.getX());
buf.put(quat.getY());
@ -347,8 +350,7 @@ public final class BufferUtils {
* @param index
* the position to place the data; in terms of vector4 not floats
*/
public static void setInBuffer(Vector4f vec, FloatBuffer buf,
int index) {
public static void setInBuffer(Vector4f vec, FloatBuffer buf, int index) {
buf.position(index * 4);
buf.put(vec.getX());
buf.put(vec.getY());
@ -438,8 +440,8 @@ public final class BufferUtils {
/**
* Copies a Vector3f from one position in the buffer to another. The index
* values are in terms of vector number (eg, vector number 0 is positions 0-2
* in the FloatBuffer.)
* values are in terms of vector number (eg, vector number 0 is positions
* 0-2 in the FloatBuffer.)
*
* @param buf
* the buffer to copy from/to
@ -534,11 +536,12 @@ public final class BufferUtils {
// // -- VECTOR2F METHODS -- ////
/**
* Generate a new FloatBuffer using the given array of Vector2f objects.
* The FloatBuffer will be 2 * data.length long and contain the vector data
* as data[0].x, data[0].y, data[1].x... etc.
* Generate a new FloatBuffer using the given array of Vector2f objects. The
* FloatBuffer will be 2 * data.length long and contain the vector data as
* data[0].x, data[0].y, data[1].x... etc.
*
* @param data array of Vector2f objects to place into a new FloatBuffer
* @param data
* array of Vector2f objects to place into a new FloatBuffer
*/
public static FloatBuffer createFloatBuffer(Vector2f... data) {
if (data == null) {
@ -643,8 +646,8 @@ public final class BufferUtils {
/**
* Copies a Vector2f from one position in the buffer to another. The index
* values are in terms of vector number (eg, vector number 0 is positions 0-1
* in the FloatBuffer.)
* values are in terms of vector number (eg, vector number 0 is positions
* 0-1 in the FloatBuffer.)
*
* @param buf
* the buffer to copy from/to
@ -737,7 +740,7 @@ public final class BufferUtils {
return eq;
}
//// -- INT METHODS -- ////
//// -- INT METHODS -- ////
/**
* Generate a new IntBuffer using the given array of ints. The IntBuffer
* will be data.length long and contain the int data as data[0], data[1]...
@ -806,7 +809,7 @@ public final class BufferUtils {
* @return the new DoubleBuffer
*/
public static DoubleBuffer createDoubleBuffer(int size) {
DoubleBuffer buf = ByteBuffer.allocateDirect(8 * size).order(ByteOrder.nativeOrder()).asDoubleBuffer();
DoubleBuffer buf = allocator.allocate(8 * size).order(ByteOrder.nativeOrder()).asDoubleBuffer();
buf.clear();
onBufferAllocated(buf);
return buf;
@ -869,7 +872,7 @@ public final class BufferUtils {
* @return the new FloatBuffer
*/
public static FloatBuffer createFloatBuffer(int size) {
FloatBuffer buf = ByteBuffer.allocateDirect(4 * size).order(ByteOrder.nativeOrder()).asFloatBuffer();
FloatBuffer buf = allocator.allocate(4 * size).order(ByteOrder.nativeOrder()).asFloatBuffer();
buf.clear();
onBufferAllocated(buf);
return buf;
@ -931,7 +934,7 @@ public final class BufferUtils {
* @return the new IntBuffer
*/
public static IntBuffer createIntBuffer(int size) {
IntBuffer buf = ByteBuffer.allocateDirect(4 * size).order(ByteOrder.nativeOrder()).asIntBuffer();
IntBuffer buf = allocator.allocate(4 * size).order(ByteOrder.nativeOrder()).asIntBuffer();
buf.clear();
onBufferAllocated(buf);
return buf;
@ -994,7 +997,7 @@ public final class BufferUtils {
* @return the new IntBuffer
*/
public static ByteBuffer createByteBuffer(int size) {
ByteBuffer buf = ByteBuffer.allocateDirect(size).order(ByteOrder.nativeOrder());
ByteBuffer buf = allocator.allocate(size).order(ByteOrder.nativeOrder());
buf.clear();
onBufferAllocated(buf);
return buf;
@ -1076,7 +1079,7 @@ public final class BufferUtils {
* @return the new ShortBuffer
*/
public static ShortBuffer createShortBuffer(int size) {
ShortBuffer buf = ByteBuffer.allocateDirect(2 * size).order(ByteOrder.nativeOrder()).asShortBuffer();
ShortBuffer buf = allocator.allocate(2 * size).order(ByteOrder.nativeOrder()).asShortBuffer();
buf.clear();
onBufferAllocated(buf);
return buf;
@ -1115,9 +1118,9 @@ public final class BufferUtils {
}
/**
* Creates a new ShortBuffer with the same contents as the given ShortBuffer.
* The new ShortBuffer is separate from the old one and changes are not
* reflected across. If you want to reflect changes, consider using
* Creates a new ShortBuffer with the same contents as the given
* ShortBuffer. The new ShortBuffer is separate from the old one and changes
* are not reflected across. If you want to reflect changes, consider using
* Buffer.duplicate().
*
* @param buf
@ -1142,12 +1145,18 @@ public final class BufferUtils {
}
/**
* Ensures there is at least the <code>required</code> number of entries left after the current position of the
* buffer. If the buffer is too small a larger one is created and the old one copied to the new buffer.
* @param buffer buffer that should be checked/copied (may be null)
* @param required minimum number of elements that should be remaining in the returned buffer
* @return a buffer large enough to receive at least the <code>required</code> number of entries, same position as
* the input buffer, not null
* Ensures there is at least the <code>required</code> number of entries
* left after the current position of the buffer. If the buffer is too small
* a larger one is created and the old one copied to the new buffer.
*
* @param buffer
* buffer that should be checked/copied (may be null)
* @param required
* minimum number of elements that should be remaining in the
* returned buffer
* @return a buffer large enough to receive at least the
* <code>required</code> number of entries, same position as the
* input buffer, not null
*/
public static FloatBuffer ensureLargeEnough(FloatBuffer buffer, int required) {
if (buffer != null) {
@ -1165,7 +1174,7 @@ public final class BufferUtils {
}
return buffer;
}
public static IntBuffer ensureLargeEnough(IntBuffer buffer, int required) {
if (buffer != null) {
buffer.limit(buffer.capacity());
@ -1182,7 +1191,6 @@ public final class BufferUtils {
}
return buffer;
}
public static ShortBuffer ensureLargeEnough(ShortBuffer buffer, int required) {
if (buffer != null) {
@ -1255,108 +1263,46 @@ public final class BufferUtils {
}
store.append("Existing buffers: ").append(BufferUtils.trackedBuffers.size()).append("\n");
store.append("(b: ").append(bBufs).append(" f: ").append(fBufs).append(" i: ").append(iBufs).append(" s: ").append(sBufs).append(" d: ").append(dBufs).append(")").append("\n");
store.append("(b: ").append(bBufs).append(" f: ").append(fBufs).append(" i: ").append(iBufs)
.append(" s: ").append(sBufs).append(" d: ").append(dBufs).append(")").append("\n");
store.append("Total heap memory held: ").append(heapMem / 1024).append("kb\n");
store.append("Total direct memory held: ").append(totalHeld / 1024).append("kb\n");
store.append("(b: ").append(bBufsM / 1024).append("kb f: ").append(fBufsM / 1024).append("kb i: ").append(iBufsM / 1024).append("kb s: ").append(sBufsM / 1024).append("kb d: ").append(dBufsM / 1024).append("kb)").append("\n");
store.append("(b: ").append(bBufsM / 1024).append("kb f: ").append(fBufsM / 1024).append("kb i: ")
.append(iBufsM / 1024).append("kb s: ").append(sBufsM / 1024).append("kb d: ")
.append(dBufsM / 1024).append("kb)").append("\n");
} else {
store.append("Total heap memory held: ").append(heapMem / 1024).append("kb\n");
store.append("Only heap memory available, if you want to monitor direct memory use BufferUtils.setTrackDirectMemoryEnabled(true) during initialization.").append("\n");
store.append(
"Only heap memory available, if you want to monitor direct memory use BufferUtils.setTrackDirectMemoryEnabled(true) during initialization.")
.append("\n");
}
if (printStout) {
System.out.println(store.toString());
}
}
private static Method cleanerMethod = null;
private static Method cleanMethod = null;
private static Method viewedBufferMethod = null;
private static Method freeMethod = null;
private static Method loadMethod(String className, String methodName) {
try {
Method method = Class.forName(className).getMethod(methodName);
method.setAccessible(true);
return method;
} catch (NoSuchMethodException ex) {
return null; // the method was not found
} catch (SecurityException ex) {
return null; // setAccessible not allowed by security policy
} catch (ClassNotFoundException ex) {
return null; // the direct buffer implementation was not found
}
}
static {
// Oracle JRE / OpenJDK
cleanerMethod = loadMethod("sun.nio.ch.DirectBuffer", "cleaner");
cleanMethod = loadMethod("sun.misc.Cleaner", "clean");
viewedBufferMethod = loadMethod("sun.nio.ch.DirectBuffer", "viewedBuffer");
if (viewedBufferMethod == null) {
// They changed the name in Java 7 (???)
viewedBufferMethod = loadMethod("sun.nio.ch.DirectBuffer", "attachment");
}
// Apache Harmony
ByteBuffer bb = BufferUtils.createByteBuffer(1);
Class<?> clazz = bb.getClass();
try {
freeMethod = clazz.getMethod("free");
} catch (NoSuchMethodException ex) {
} catch (SecurityException ex) {
}
}
/**
* Direct buffers are garbage collected by using a phantom reference and a
* reference queue. Every once a while, the JVM checks the reference queue and
* cleans the direct buffers. However, as this doesn't happen
* immediately after discarding all references to a direct buffer, it's
* easy to OutOfMemoryError yourself using direct buffers. This function
* explicitly calls the Cleaner method of a direct buffer.
*
* @param toBeDestroyed
* The direct buffer that will be "cleaned". Utilizes reflection.
*
*/
* reference queue. Every once a while, the JVM checks the reference queue
* and cleans the direct buffers. However, as this doesn't happen
* immediately after discarding all references to a direct buffer, it's easy
* to OutOfMemoryError yourself using direct buffers.
**/
public static void destroyDirectBuffer(Buffer toBeDestroyed) {
if (!isDirect(toBeDestroyed)) {
return;
}
try {
if (freeMethod != null) {
freeMethod.invoke(toBeDestroyed);
} else {
Object cleaner = cleanerMethod.invoke(toBeDestroyed);
if (cleaner != null) {
cleanMethod.invoke(cleaner);
} else {
// Try the alternate approach of getting the viewed buffer first
Object viewedBuffer = viewedBufferMethod.invoke(toBeDestroyed);
if (viewedBuffer != null) {
destroyDirectBuffer((Buffer) viewedBuffer);
} else {
Logger.getLogger(BufferUtils.class.getName()).log(Level.SEVERE, "Buffer cannot be destroyed: {0}", toBeDestroyed);
}
}
}
} catch (IllegalAccessException ex) {
Logger.getLogger(BufferUtils.class.getName()).log(Level.SEVERE, "{0}", ex);
} catch (IllegalArgumentException ex) {
Logger.getLogger(BufferUtils.class.getName()).log(Level.SEVERE, "{0}", ex);
} catch (InvocationTargetException ex) {
Logger.getLogger(BufferUtils.class.getName()).log(Level.SEVERE, "{0}", ex);
} catch (SecurityException ex) {
Logger.getLogger(BufferUtils.class.getName()).log(Level.SEVERE, "{0}", ex);
}
allocator.destroyDirectBuffer(toBeDestroyed);
}
/*
* FIXME when java 1.5 supprt is dropped - replace calls to this method with Buffer.isDirect
* FIXME when java 1.5 supprt is dropped - replace calls to this method with
* Buffer.isDirect
*
* Buffer.isDirect() is only java 6. Java 5 only have this method on Buffer subclasses :
* FloatBuffer, IntBuffer, ShortBuffer, ByteBuffer,DoubleBuffer, LongBuffer.
* CharBuffer has been excluded as we don't use it.
* Buffer.isDirect() is only java 6. Java 5 only have this method on Buffer
* subclasses : FloatBuffer, IntBuffer, ShortBuffer,
* ByteBuffer,DoubleBuffer, LongBuffer. CharBuffer has been excluded as we
* don't use it.
*
*/
private static boolean isDirect(Buffer buf) {

55
jme3-core/src/main/java/com/jme3/util/PrimitiveAllocator.java Normal file
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@ -0,0 +1,55 @@
/*
* Copyright (c) 2009-2012 jMonkeyEngine
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * 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.
*
* * Neither the name of 'jMonkeyEngine' nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE COPYRIGHT OWNER 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.
*/
package com.jme3.util;
import java.nio.Buffer;
import java.nio.ByteBuffer;
/**
* This class contains a primitve allocator with no special logic, should work
* on any jvm
*/
public final class PrimitiveAllocator implements BufferAllocator {
@Override
public void destroyDirectBuffer(Buffer toBeDestroyed) {
// no exception by intent, as this way naivly written java7/8
// applications wont crash on 9 assuming they can dispose buffers
System.err.println("Warning destroyBuffer not supported");
}
@Override
public ByteBuffer allocate(int size) {
return ByteBuffer.allocateDirect(size);
}
}

130
jme3-core/src/main/java/com/jme3/util/ReflectionAllocator.java Normal file
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@ -0,0 +1,130 @@
/*
* Copyright (c) 2009-2012 jMonkeyEngine
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * 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.
*
* * Neither the name of 'jMonkeyEngine' nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE COPYRIGHT OWNER 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.
*/
package com.jme3.util;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* This class contains the reflection based way to remove DirectByteBuffers in
* java < 9, allocation is done via ByteBuffer.allocateDirect
*/
public final class ReflectionAllocator implements BufferAllocator {
private static Method cleanerMethod = null;
private static Method cleanMethod = null;
private static Method viewedBufferMethod = null;
private static Method freeMethod = null;
static {
// Oracle JRE / OpenJDK
cleanerMethod = loadMethod("sun.nio.ch.DirectBuffer", "cleaner");
cleanMethod = loadMethod("sun.misc.Cleaner", "clean");
viewedBufferMethod = loadMethod("sun.nio.ch.DirectBuffer", "viewedBuffer");
if (viewedBufferMethod == null) {
// They changed the name in Java 7 (???)
viewedBufferMethod = loadMethod("sun.nio.ch.DirectBuffer", "attachment");
}
// Apache Harmony (allocated directly, to not trigger allocator used
// logic in BufferUtils)
ByteBuffer bb = ByteBuffer.allocateDirect(1);
Class<?> clazz = bb.getClass();
try {
freeMethod = clazz.getMethod("free");
} catch (NoSuchMethodException ex) {
} catch (SecurityException ex) {
}
}
private static Method loadMethod(String className, String methodName) {
try {
Method method = Class.forName(className).getMethod(methodName);
method.setAccessible(true);
return method;
} catch (NoSuchMethodException ex) {
return null; // the method was not found
} catch (SecurityException ex) {
return null; // setAccessible not allowed by security policy
} catch (ClassNotFoundException ex) {
return null; // the direct buffer implementation was not found
}
}
@Override
/**
* This function explicitly calls the Cleaner method of a direct buffer.
*
* @param toBeDestroyed
* The direct buffer that will be "cleaned". Utilizes reflection.
*
*/
public void destroyDirectBuffer(Buffer toBeDestroyed) {
try {
if (freeMethod != null) {
freeMethod.invoke(toBeDestroyed);
} else {
Object cleaner = cleanerMethod.invoke(toBeDestroyed);
if (cleaner != null) {
cleanMethod.invoke(cleaner);
} else {
// Try the alternate approach of getting the viewed buffer
// first
Object viewedBuffer = viewedBufferMethod.invoke(toBeDestroyed);
if (viewedBuffer != null) {
destroyDirectBuffer((Buffer) viewedBuffer);
} else {
Logger.getLogger(BufferUtils.class.getName()).log(Level.SEVERE,
"Buffer cannot be destroyed: {0}", toBeDestroyed);
}
}
}
} catch (IllegalAccessException ex) {
Logger.getLogger(BufferUtils.class.getName()).log(Level.SEVERE, "{0}", ex);
} catch (IllegalArgumentException ex) {
Logger.getLogger(BufferUtils.class.getName()).log(Level.SEVERE, "{0}", ex);
} catch (InvocationTargetException ex) {
Logger.getLogger(BufferUtils.class.getName()).log(Level.SEVERE, "{0}", ex);
} catch (SecurityException ex) {
Logger.getLogger(BufferUtils.class.getName()).log(Level.SEVERE, "{0}", ex);
}
}
@Override
public ByteBuffer allocate(int size) {
return ByteBuffer.allocateDirect(size);
}
}