/*
    * Copyright 2015 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.Recycler;
  import io.netty.util.Recycler.Handle;
  import io.netty.util.internal.PlatformDependent;
  
  final class PooledUnsafeHeapByteBuf extends PooledHeapByteBuf {
  
      private static final Recycler<PooledUnsafeHeapByteBuf> RECYCLER = new Recycler<PooledUnsafeHeapByteBuf>() {
          @Override
          protected PooledUnsafeHeapByteBuf newObject(Handle handle) {
              return new PooledUnsafeHeapByteBuf(handle, 0);
          }
      };
  
      static PooledUnsafeHeapByteBuf newUnsafeInstance(int maxCapacity) {
          PooledUnsafeHeapByteBuf buf = RECYCLER.get();
          buf.reuse(maxCapacity);
          return buf;
      }
  
      private PooledUnsafeHeapByteBuf(Handle recyclerHandle, int maxCapacity) {
          super(recyclerHandle, maxCapacity);
      }
  
      @Override
      protected byte _getByte(int index) {
          return UnsafeByteBufUtil.getByte(memory, idx(index));
      }
  
      @Override
      protected short _getShort(int index) {
          return UnsafeByteBufUtil.getShort(memory, idx(index));
      }
  
      @Override
      protected int _getUnsignedMedium(int index) {
          return UnsafeByteBufUtil.getUnsignedMedium(memory, idx(index));
      }
  
      @Override
      protected int _getInt(int index) {
          return UnsafeByteBufUtil.getInt(memory, idx(index));
      }
  
      @Override
      protected long _getLong(int index) {
          return UnsafeByteBufUtil.getLong(memory, idx(index));
      }
  
      @Override
      protected void _setByte(int index, int value) {
          UnsafeByteBufUtil.setByte(memory, idx(index), value);
      }
  
      @Override
      protected void _setShort(int index, int value) {
          UnsafeByteBufUtil.setShort(memory, idx(index), value);
      }
  
      @Override
      protected void _setMedium(int index, int value) {
          UnsafeByteBufUtil.setMedium(memory, idx(index), value);
      }
  
      @Override
      protected void _setInt(int index, int value) {
          UnsafeByteBufUtil.setInt(memory, idx(index), value);
      }
  
      @Override
      protected void _setLong(int index, long value) {
          UnsafeByteBufUtil.setLong(memory, idx(index), value);
      }
  
      @Override
      protected Recycler<?> recycler() {
          return RECYCLER;
      }
  
      @Override
      public ByteBuf setZero(int index, int length) {
          if (PlatformDependent.javaVersion() >= 7) {
              checkIndex(index, length);
             // Only do on java7+ as the needed Unsafe call was only added there.
             UnsafeByteBufUtil.setZero(memory, idx(index), length);
             return this;
         }
         return super.setZero(index, length);
     }
 
     @Override
     public ByteBuf writeZero(int length) {
         if (PlatformDependent.javaVersion() >= 7) {
             // Only do on java7+ as the needed Unsafe call was only added there.
             ensureWritable(length);
             int wIndex = writerIndex;
             UnsafeByteBufUtil.setZero(memory, idx(wIndex), length);
             writerIndex = wIndex + length;
             return this;
         }
         return super.writeZero(length);
     }
 
     @Override
     @Deprecated
     protected SwappedByteBuf newSwappedByteBuf() {
         if (PlatformDependent.isUnaligned()) {
             // Only use if unaligned access is supported otherwise there is no gain.
             return new UnsafeHeapSwappedByteBuf(this);
         }
         return super.newSwappedByteBuf();
     }
 }