diff options
Diffstat (limited to 'third_party/protobuf/3.2.0/java/core/src/main/java/com/google/protobuf/UnsafeUtil.java')
-rw-r--r-- | third_party/protobuf/3.2.0/java/core/src/main/java/com/google/protobuf/UnsafeUtil.java | 295 |
1 files changed, 0 insertions, 295 deletions
diff --git a/third_party/protobuf/3.2.0/java/core/src/main/java/com/google/protobuf/UnsafeUtil.java b/third_party/protobuf/3.2.0/java/core/src/main/java/com/google/protobuf/UnsafeUtil.java deleted file mode 100644 index 5f7bafd602..0000000000 --- a/third_party/protobuf/3.2.0/java/core/src/main/java/com/google/protobuf/UnsafeUtil.java +++ /dev/null @@ -1,295 +0,0 @@ -// Protocol Buffers - Google's data interchange format -// Copyright 2008 Google Inc. All rights reserved. -// https://developers.google.com/protocol-buffers/ -// -// 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 Google Inc. 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.google.protobuf; - -import java.lang.reflect.Field; -import java.nio.Buffer; -import java.nio.ByteBuffer; -import java.security.AccessController; -import java.security.PrivilegedExceptionAction; -import sun.misc.Unsafe; - -/** Utility class for working with unsafe operations. */ -// TODO(nathanmittler): Add support for Android Memory/MemoryBlock -final class UnsafeUtil { - private static final sun.misc.Unsafe UNSAFE = getUnsafe(); - private static final boolean HAS_UNSAFE_BYTEBUFFER_OPERATIONS = - supportsUnsafeByteBufferOperations(); - private static final boolean HAS_UNSAFE_ARRAY_OPERATIONS = supportsUnsafeArrayOperations(); - private static final long ARRAY_BASE_OFFSET = byteArrayBaseOffset(); - private static final long BUFFER_ADDRESS_OFFSET = fieldOffset(field(Buffer.class, "address")); - - private UnsafeUtil() {} - - static boolean hasUnsafeArrayOperations() { - return HAS_UNSAFE_ARRAY_OPERATIONS; - } - - static boolean hasUnsafeByteBufferOperations() { - return HAS_UNSAFE_BYTEBUFFER_OPERATIONS; - } - - static Object allocateInstance(Class<?> clazz) { - try { - return UNSAFE.allocateInstance(clazz); - } catch (InstantiationException e) { - throw new RuntimeException(e); - } - } - - static long objectFieldOffset(Field field) { - return UNSAFE.objectFieldOffset(field); - } - - static long getArrayBaseOffset() { - return ARRAY_BASE_OFFSET; - } - - static byte getByte(Object target, long offset) { - return UNSAFE.getByte(target, offset); - } - - static void putByte(Object target, long offset, byte value) { - UNSAFE.putByte(target, offset, value); - } - - static int getInt(Object target, long offset) { - return UNSAFE.getInt(target, offset); - } - - static void putInt(Object target, long offset, int value) { - UNSAFE.putInt(target, offset, value); - } - - static long getLong(Object target, long offset) { - return UNSAFE.getLong(target, offset); - } - - static void putLong(Object target, long offset, long value) { - UNSAFE.putLong(target, offset, value); - } - - static boolean getBoolean(Object target, long offset) { - return UNSAFE.getBoolean(target, offset); - } - - static void putBoolean(Object target, long offset, boolean value) { - UNSAFE.putBoolean(target, offset, value); - } - - static float getFloat(Object target, long offset) { - return UNSAFE.getFloat(target, offset); - } - - static void putFloat(Object target, long offset, float value) { - UNSAFE.putFloat(target, offset, value); - } - - static double getDouble(Object target, long offset) { - return UNSAFE.getDouble(target, offset); - } - - static void putDouble(Object target, long offset, double value) { - UNSAFE.putDouble(target, offset, value); - } - - static Object getObject(Object target, long offset) { - return UNSAFE.getObject(target, offset); - } - - static void putObject(Object target, long offset, Object value) { - UNSAFE.putObject(target, offset, value); - } - - static void copyMemory( - Object src, long srcOffset, Object target, long targetOffset, long length) { - UNSAFE.copyMemory(src, srcOffset, target, targetOffset, length); - } - - static byte getByte(long address) { - return UNSAFE.getByte(address); - } - - static void putByte(long address, byte value) { - UNSAFE.putByte(address, value); - } - - static int getInt(long address) { - return UNSAFE.getInt(address); - } - - static void putInt(long address, int value) { - UNSAFE.putInt(address, value); - } - - static long getLong(long address) { - return UNSAFE.getLong(address); - } - - static void putLong(long address, long value) { - UNSAFE.putLong(address, value); - } - - static void copyMemory(long srcAddress, long targetAddress, long length) { - UNSAFE.copyMemory(srcAddress, targetAddress, length); - } - - static void setMemory(long address, long numBytes, byte value) { - UNSAFE.setMemory(address, numBytes, value); - } - - /** - * Gets the offset of the {@code address} field of the given direct {@link ByteBuffer}. - */ - static long addressOffset(ByteBuffer buffer) { - return UNSAFE.getLong(buffer, BUFFER_ADDRESS_OFFSET); - } - - /** - * Gets the {@code sun.misc.Unsafe} instance, or {@code null} if not available on this platform. - */ - private static sun.misc.Unsafe getUnsafe() { - sun.misc.Unsafe unsafe = null; - try { - unsafe = - AccessController.doPrivileged( - new PrivilegedExceptionAction<Unsafe>() { - @Override - public sun.misc.Unsafe run() throws Exception { - Class<sun.misc.Unsafe> k = sun.misc.Unsafe.class; - - for (Field f : k.getDeclaredFields()) { - f.setAccessible(true); - Object x = f.get(null); - if (k.isInstance(x)) { - return k.cast(x); - } - } - // The sun.misc.Unsafe field does not exist. - return null; - } - }); - } catch (Throwable e) { - // Catching Throwable here due to the fact that Google AppEngine raises NoClassDefFoundError - // for Unsafe. - } - return unsafe; - } - - /** Indicates whether or not unsafe array operations are supported on this platform. */ - private static boolean supportsUnsafeArrayOperations() { - boolean supported = false; - if (UNSAFE != null) { - try { - Class<?> clazz = UNSAFE.getClass(); - clazz.getMethod("objectFieldOffset", Field.class); - clazz.getMethod("allocateInstance", Class.class); - clazz.getMethod("arrayBaseOffset", Class.class); - clazz.getMethod("getByte", Object.class, long.class); - clazz.getMethod("putByte", Object.class, long.class, byte.class); - clazz.getMethod("getBoolean", Object.class, long.class); - clazz.getMethod("putBoolean", Object.class, long.class, boolean.class); - clazz.getMethod("getInt", Object.class, long.class); - clazz.getMethod("putInt", Object.class, long.class, int.class); - clazz.getMethod("getLong", Object.class, long.class); - clazz.getMethod("putLong", Object.class, long.class, long.class); - clazz.getMethod("getFloat", Object.class, long.class); - clazz.getMethod("putFloat", Object.class, long.class, float.class); - clazz.getMethod("getDouble", Object.class, long.class); - clazz.getMethod("putDouble", Object.class, long.class, double.class); - clazz.getMethod("getObject", Object.class, long.class); - clazz.getMethod("putObject", Object.class, long.class, Object.class); - clazz.getMethod( - "copyMemory", Object.class, long.class, Object.class, long.class, long.class); - supported = true; - } catch (Throwable e) { - // Do nothing. - } - } - return supported; - } - - private static boolean supportsUnsafeByteBufferOperations() { - boolean supported = false; - if (UNSAFE != null) { - try { - Class<?> clazz = UNSAFE.getClass(); - // Methods for getting direct buffer address. - clazz.getMethod("objectFieldOffset", Field.class); - clazz.getMethod("getLong", Object.class, long.class); - - clazz.getMethod("getByte", long.class); - clazz.getMethod("putByte", long.class, byte.class); - clazz.getMethod("getInt", long.class); - clazz.getMethod("putInt", long.class, int.class); - clazz.getMethod("getLong", long.class); - clazz.getMethod("putLong", long.class, long.class); - clazz.getMethod("setMemory", long.class, long.class, byte.class); - clazz.getMethod("copyMemory", long.class, long.class, long.class); - supported = true; - } catch (Throwable e) { - // Do nothing. - } - } - return supported; - } - - /** - * Get the base offset for byte arrays, or {@code -1} if {@code sun.misc.Unsafe} is not available. - */ - private static int byteArrayBaseOffset() { - return HAS_UNSAFE_ARRAY_OPERATIONS ? UNSAFE.arrayBaseOffset(byte[].class) : -1; - } - - /** - * Returns the offset of the provided field, or {@code -1} if {@code sun.misc.Unsafe} is not - * available. - */ - private static long fieldOffset(Field field) { - return field == null || UNSAFE == null ? -1 : UNSAFE.objectFieldOffset(field); - } - - /** - * Gets the field with the given name within the class, or {@code null} if not found. If found, - * the field is made accessible. - */ - private static Field field(Class<?> clazz, String fieldName) { - Field field; - try { - field = clazz.getDeclaredField(fieldName); - field.setAccessible(true); - } catch (Throwable t) { - // Failed to access the fields. - field = null; - } - return field; - } -} |