Chris@16: // boost lockfree
Chris@16: //
Chris@16: // Copyright (C) 2011 Tim Blechmann
Chris@16: //
Chris@16: // Distributed under the Boost Software License, Version 1.0. (See
Chris@16: // accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: #ifndef BOOST_LOCKFREE_DETAIL_PARAMETER_HPP
Chris@16: #define BOOST_LOCKFREE_DETAIL_PARAMETER_HPP
Chris@16: 
Chris@16: #include <boost/lockfree/policies.hpp>
Chris@16: 
Chris@16: namespace boost {
Chris@16: namespace lockfree {
Chris@16: namespace detail {
Chris@16: 
Chris@16: namespace mpl = boost::mpl;
Chris@16: 
Chris@16: template <typename bound_args, typename tag_type>
Chris@16: struct has_arg
Chris@16: {
Chris@16:     typedef typename parameter::binding<bound_args, tag_type, mpl::void_>::type type;
Chris@16:     static const bool value = mpl::is_not_void_<type>::type::value;
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: template <typename bound_args>
Chris@16: struct extract_capacity
Chris@16: {
Chris@16:     static const bool has_capacity = has_arg<bound_args, tag::capacity>::value;
Chris@16: 
Chris@16:     typedef typename mpl::if_c<has_capacity,
Chris@16:                                typename has_arg<bound_args, tag::capacity>::type,
Chris@16:                                mpl::size_t< 0 >
Chris@16:                               >::type capacity_t;
Chris@16: 
Chris@16:     static const std::size_t capacity = capacity_t::value;
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: template <typename bound_args, typename T>
Chris@16: struct extract_allocator
Chris@16: {
Chris@16:     static const bool has_allocator = has_arg<bound_args, tag::allocator>::value;
Chris@16: 
Chris@16:     typedef typename mpl::if_c<has_allocator,
Chris@16:                                typename has_arg<bound_args, tag::allocator>::type,
Chris@16:                                std::allocator<T>
Chris@16:                               >::type allocator_arg;
Chris@16: 
Chris@16:     typedef typename allocator_arg::template rebind<T>::other type;
Chris@16: };
Chris@16: 
Chris@16: template <typename bound_args, bool default_ = false>
Chris@16: struct extract_fixed_sized
Chris@16: {
Chris@16:     static const bool has_fixed_sized = has_arg<bound_args, tag::fixed_sized>::value;
Chris@16: 
Chris@16:     typedef typename mpl::if_c<has_fixed_sized,
Chris@16:                                typename has_arg<bound_args, tag::fixed_sized>::type,
Chris@16:                                mpl::bool_<default_>
Chris@16:                               >::type type;
Chris@16: 
Chris@16:     static const bool value = type::value;
Chris@16: };
Chris@16: 
Chris@16: 
Chris@16: } /* namespace detail */
Chris@16: } /* namespace lockfree */
Chris@16: } /* namespace boost */
Chris@16: 
Chris@16: #endif /* BOOST_LOCKFREE_DETAIL_PARAMETER_HPP */