diff options
Diffstat (limited to 'android/Bootstrap/src/org/libreoffice/kit/DirectBufferAllocator.java')
-rw-r--r-- | android/Bootstrap/src/org/libreoffice/kit/DirectBufferAllocator.java | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/android/Bootstrap/src/org/libreoffice/kit/DirectBufferAllocator.java b/android/Bootstrap/src/org/libreoffice/kit/DirectBufferAllocator.java new file mode 100644 index 000000000..99cb3a486 --- /dev/null +++ b/android/Bootstrap/src/org/libreoffice/kit/DirectBufferAllocator.java @@ -0,0 +1,57 @@ +/* -*- 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; + } +} |