1 /*
2 * Copyright 2015 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.buffer;
17
18 /**
19 * Metrics for a sub-page.
20 */
21 public interface PoolSubpageMetric {
22
23 /**
24 * Return the number of maximal elements that can be allocated out of the sub-page.
25 */
26 int maxNumElements();
27
28 /**
29 * Return the number of available elements to be allocated.
30 */
31 int numAvailable();
32
33 /**
34 * Return the size (in bytes) of the elements that will be allocated.
35 */
36 int elementSize();
37
38 /**
39 * Return the size (in bytes) of this page.
40 */
41 int pageSize();
42 }
43