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// branch hints
// Copyright (C) 2007, 2008 Tim Blechmann
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_LOCKFREE_BRANCH_HINTS_HPP_INCLUDED
#define BOOST_LOCKFREE_BRANCH_HINTS_HPP_INCLUDED
namespace boost {
namespace lockfree {
namespace detail {
/** \brief hint for the branch prediction */
inline bool likely(bool expr)
{
#ifdef __GNUC__
return __builtin_expect(expr, true);
#else
return expr;
#endif
}
/** \brief hint for the branch prediction */
inline bool unlikely(bool expr)
{
#ifdef __GNUC__
return __builtin_expect(expr, false);
#else
return expr;
#endif
}
} /* namespace detail */
} /* namespace lockfree */
} /* namespace boost */
#endif /* BOOST_LOCKFREE_BRANCH_HINTS_HPP_INCLUDED */
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