blob: 575466678f8a2ea3fe688049698e06251aa26927 [file] [log] [blame]
Roman Stratiienko6a7ac122021-04-02 17:19:54 +03001// clang-format off
2/*
3 * Copyright (C) 2009 The Android Open Source Project
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18#ifndef ANDROID_CUTILS_COMPILER_H
19#define ANDROID_CUTILS_COMPILER_H
20
21/*
22 * helps the compiler's optimizer predicting branches
23 */
24
25#ifdef __cplusplus
26# define CC_LIKELY( exp ) (__builtin_expect( !!(exp), true ))
27# define CC_UNLIKELY( exp ) (__builtin_expect( !!(exp), false ))
28#else
29# define CC_LIKELY( exp ) (__builtin_expect( !!(exp), 1 ))
30# define CC_UNLIKELY( exp ) (__builtin_expect( !!(exp), 0 ))
31#endif
32
33/**
34 * exports marked symbols
35 *
36 * if used on a C++ class declaration, this macro must be inserted
37 * after the "class" keyword. For instance:
38 *
39 * template <typename TYPE>
40 * class ANDROID_API Singleton { }
41 */
42
43#define ANDROID_API __attribute__((visibility("default")))
44
45#endif // ANDROID_CUTILS_COMPILER_H