io.netty.buffer.UnsafeDirectSwappedByteBuf Maven / Gradle / Ivy
/*
* Copyright 2014 The Netty Project
*
* The Netty Project licenses this file to you under the Apache License,
* version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at:
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package io.netty.buffer;
import io.netty.util.internal.PlatformDependent;
/**
* Special {@link SwappedByteBuf} for {@link ByteBuf}s that are backed by a {@code memoryAddress}.
*/
final class UnsafeDirectSwappedByteBuf extends AbstractUnsafeSwappedByteBuf {
UnsafeDirectSwappedByteBuf(AbstractByteBuf buf) {
super(buf);
}
private static long addr(AbstractByteBuf wrapped, int index) {
// We need to call wrapped.memoryAddress() everytime and NOT cache it as it may change if the buffer expand.
// See:
// - https://github.com/netty/netty/issues/2587
// - https://github.com/netty/netty/issues/2580
return wrapped.memoryAddress() + index;
}
@Override
protected long _getLong(AbstractByteBuf wrapped, int index) {
return PlatformDependent.getLong(addr(wrapped, index));
}
@Override
protected int _getInt(AbstractByteBuf wrapped, int index) {
return PlatformDependent.getInt(addr(wrapped, index));
}
@Override
protected short _getShort(AbstractByteBuf wrapped, int index) {
return PlatformDependent.getShort(addr(wrapped, index));
}
@Override
protected void _setShort(AbstractByteBuf wrapped, int index, short value) {
PlatformDependent.putShort(addr(wrapped, index), value);
}
@Override
protected void _setInt(AbstractByteBuf wrapped, int index, int value) {
PlatformDependent.putInt(addr(wrapped, index), value);
}
@Override
protected void _setLong(AbstractByteBuf wrapped, int index, long value) {
PlatformDependent.putLong(addr(wrapped, index), value);
}
}