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1   /*
2   * Copyright 2017 The Netty Project
3   *
4   * The Netty Project licenses this file to you under the Apache License,
5   * version 2.0 (the "License"); you may not use this file except in compliance
6   * with the License. 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, WITHOUT
12  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13  * License for the specific language governing permissions and limitations
14  * under the License.
15  */
16  package io.netty.util.internal;
17  
18  import java.nio.ByteBuffer;
19  
20  /**
21   * Allows to free direct {@link ByteBuffer}s.
22   */
23  interface Cleaner {
24  
25      /**
26       * Free a direct {@link ByteBuffer} if possible
27       */
28      void freeDirectBuffer(ByteBuffer buffer);
29  }