1 files changed, 73 insertions, 0 deletions
diff --git a/boost/lockfree/detail/parameter.hpp b/boost/lockfree/detail/parameter.hpp
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+++ b/boost/lockfree/detail/parameter.hpp
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+// boost lockfree
+//
+// Copyright (C) 2011 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_DETAIL_PARAMETER_HPP
+#define BOOST_LOCKFREE_DETAIL_PARAMETER_HPP
+
+#include <boost/lockfree/policies.hpp>
+
+namespace boost {
+namespace lockfree {
+namespace detail {
+
+namespace mpl = boost::mpl;
+
+template <typename bound_args, typename tag_type>
+struct has_arg
+{
+    typedef typename parameter::binding<bound_args, tag_type, mpl::void_>::type type;
+    static const bool value = mpl::is_not_void_<type>::type::value;
+};
+
+
+template <typename bound_args>
+struct extract_capacity
+{
+    static const bool has_capacity = has_arg<bound_args, tag::capacity>::value;
+
+    typedef typename mpl::if_c<has_capacity,
+                               typename has_arg<bound_args, tag::capacity>::type,
+                               mpl::size_t< 0 >
+                              >::type capacity_t;
+
+    static const std::size_t capacity = capacity_t::value;
+};
+
+
+template <typename bound_args, typename T>
+struct extract_allocator
+{
+    static const bool has_allocator = has_arg<bound_args, tag::allocator>::value;
+
+    typedef typename mpl::if_c<has_allocator,
+                               typename has_arg<bound_args, tag::allocator>::type,
+                               std::allocator<T>
+                              >::type allocator_arg;
+
+    typedef typename allocator_arg::template rebind<T>::other type;
+};
+
+template <typename bound_args, bool default_ = false>
+struct extract_fixed_sized
+{
+    static const bool has_fixed_sized = has_arg<bound_args, tag::fixed_sized>::value;
+
+    typedef typename mpl::if_c<has_fixed_sized,
+                               typename has_arg<bound_args, tag::fixed_sized>::type,
+                               mpl::bool_<default_>
+                              >::type type;
+
+    static const bool value = type::value;
+};
+
+
+} /* namespace detail */
+} /* namespace lockfree */
+} /* namespace boost */
+
+#endif /* BOOST_LOCKFREE_DETAIL_PARAMETER_HPP */