1 /* 2 * Copyright 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package org.conscrypt; 17 18 import io.netty.buffer.ByteBuf; 19 import io.netty.buffer.ByteBufAllocator; 20 import io.netty.buffer.PooledByteBufAllocator; 21 import java.nio.ByteBuffer; 22 23 /** 24 * A {@link BufferAllocator} that is backed by a Netty buffer pool. 25 */ 26 final class NettyBufferAllocator extends BufferAllocator { 27 private static final ByteBufAllocator alloc = PooledByteBufAllocator.DEFAULT; 28 private static final NettyBufferAllocator instance = new NettyBufferAllocator(); 29 30 static NettyBufferAllocator getInstance() { 31 return instance; 32 } 33 34 private NettyBufferAllocator() {} 35 36 @Override 37 public AllocatedBuffer allocateDirectBuffer(int capacity) { 38 return new ByteBufAdapter(alloc.directBuffer(capacity)); 39 } 40 41 private static final class ByteBufAdapter extends AllocatedBuffer { 42 private final ByteBuf nettyBuffer; 43 private final ByteBuffer buffer; 44 45 private ByteBufAdapter(ByteBuf nettyBuffer) { 46 this.nettyBuffer = nettyBuffer; 47 this.buffer = nettyBuffer.nioBuffer(0, nettyBuffer.capacity()); 48 } 49 50 @Override 51 public ByteBuffer nioBuffer() { 52 return buffer; 53 } 54 55 @Override 56 public AllocatedBuffer retain() { 57 nettyBuffer.retain(); 58 return this; 59 } 60 61 @Override 62 public AllocatedBuffer release() { 63 nettyBuffer.release(); 64 return this; 65 } 66 } 67 } 68
