| jvanverth@google.com | 8ffb704 | 2012-12-13 19:53:18 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2012 The Android Open Source Project |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
| 8 | #ifndef ANDROID_CUTILS_COMPILER_H |
| 9 | #define ANDROID_CUTILS_COMPILER_H |
| 10 | |
| 11 | /* |
| 12 | * helps the compiler's optimizer predicting branches |
| 13 | */ |
| 14 | |
| 15 | #ifdef __cplusplus |
| 16 | # define CC_LIKELY( exp ) (__builtin_expect( !!(exp), true )) |
| 17 | # define CC_UNLIKELY( exp ) (__builtin_expect( !!(exp), false )) |
| 18 | #else |
| 19 | # define CC_LIKELY( exp ) (__builtin_expect( !!(exp), 1 )) |
| 20 | # define CC_UNLIKELY( exp ) (__builtin_expect( !!(exp), 0 )) |
| 21 | #endif |
| 22 | |
| 23 | /** |
| 24 | * exports marked symbols |
| 25 | * |
| 26 | * if used on a C++ class declaration, this macro must be inserted |
| 27 | * after the "class" keyword. For instance: |
| 28 | * |
| 29 | * template <typename TYPE> |
| 30 | * class ANDROID_API Singleton { } |
| 31 | */ |
| 32 | |
| 33 | #define ANDROID_API __attribute__((visibility("default"))) |
| 34 | |
| 35 | #endif // ANDROID_CUTILS_COMPILER_H |