libcruft-util/annotation.hpp

/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Copyright 2011 Danny Robson <danny@nerdcruft.net>
 */

#ifndef __UTIL_ANNOTATION_HPP
#define __UTIL_ANNOTATION_HPP

template <typename T>
constexpr inline
bool
likely (T &&t)
{ return __builtin_expect (!!t, true); }


template <typename T>
constexpr inline
bool
unlikely (T &&t)
{ return __builtin_expect (!!t, false); }


constexpr inline
long
expect (long val, long typical)
{
    return __builtin_expect (val, typical);
}


#endif