| 12345678910111213141516171819202122232425262728 |
- /*
- * Copyright (c) 2016-present, Facebook, Inc.
- * All rights reserved.
- *
- * This source code is licensed under both the BSD-style license (found in the
- * LICENSE file in the root directory of this source tree) and the GPLv2 (found
- * in the COPYING file in the root directory of this source tree).
- */
-
- /**
- * Compiler hints to indicate the fast path of an "if" branch: whether
- * the if condition is likely to be true or false.
- *
- * @author Tudor Bosman ([email protected])
- */
- #pragma once
- #undef LIKELY
- #undef UNLIKELY
- #if defined(__GNUC__) && __GNUC__ >= 4
- #define LIKELY(x) (__builtin_expect((x), 1))
- #define UNLIKELY(x) (__builtin_expect((x), 0))
- #else
- #define LIKELY(x) (x)
- #define UNLIKELY(x) (x)
- #endif
|
