1 /*
2  * Copyright (C) 2009 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 
17 #ifndef ANDROID_CUTILS_COMPILER_H
18 #define ANDROID_CUTILS_COMPILER_H
19 
20 /*
21  * helps the compiler's optimizer predicting branches
22  */
23 
24 #ifdef __cplusplus
25 #   define CC_LIKELY( exp )    (__builtin_expect( !!(exp), true ))
26 #   define CC_UNLIKELY( exp )  (__builtin_expect( !!(exp), false ))
27 #else
28 #   define CC_LIKELY( exp )    (__builtin_expect( !!(exp), 1 ))
29 #   define CC_UNLIKELY( exp )  (__builtin_expect( !!(exp), 0 ))
30 #endif
31 
32 /**
33  * exports marked symbols
34  *
35  * if used on a C++ class declaration, this macro must be inserted
36  * after the "class" keyword. For instance:
37  *
38  * template <typename TYPE>
39  * class ANDROID_API Singleton { }
40  */
41 
42 #define ANDROID_API __attribute__((visibility("default")))
43 
44 #endif // ANDROID_CUTILS_COMPILER_H
45