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.buffer;
17
18 public interface ByteBufAllocatorMetric {
19 /**
20 * Returns the number of bytes of heap memory used by a {@link ByteBufAllocator} or {@code -1} if unknown.
21 */
22 long usedHeapMemory();
23
24 /**
25 * Returns the number of bytes of direct memory used by a {@link ByteBufAllocator} or {@code -1} if unknown.
26 */
27 long usedDirectMemory();
28 }