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/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.libreoffice.kit;
import java.nio.ByteBuffer;
/**
* This is the common code for allocation and freeing of memory. For this direct ByteBuffer is used but
* in the past it was possible to use a JNI version of allocation because of a bug in old Android version.
*/
public final class DirectBufferAllocator {
private static final String LOGTAG = DirectBufferAllocator.class.getSimpleName();
private DirectBufferAllocator() {
}
public static ByteBuffer allocate(int size) {
ByteBuffer directBuffer = ByteBuffer.allocateDirect(size);
if (directBuffer == null) {
if (size <= 0) {
throw new IllegalArgumentException("Invalid allocation size: " + size);
} else {
throw new OutOfMemoryError("allocateDirectBuffer() returned null");
}
} else if (!directBuffer.isDirect()) {
throw new AssertionError("allocateDirectBuffer() did not return a direct buffer");
}
return directBuffer;
}
public static ByteBuffer free(ByteBuffer buffer) {
if (buffer == null) {
return null;
}
if (!buffer.isDirect()) {
throw new IllegalArgumentException("ByteBuffer must be direct");
}
// can't free buffer - leave this to the VM
return null;
}
public static ByteBuffer guardedAllocate(int size) {
ByteBuffer buffer = null;
try {
buffer = allocate(size);
} catch (OutOfMemoryError oomException) {
return null;
}
return buffer;
}
}
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