/*
 * 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 (tudorb@fb.com)
 */

#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