/*
* 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:
*
* http://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);
}
}