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57 lines
1.7 KiB
57 lines
1.7 KiB
// boost lockfree |
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// |
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// Copyright (C) 2011 Tim Blechmann |
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// |
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// Distributed under the Boost Software License, Version 1.0. (See |
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// accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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#ifndef BOOST_LOCKFREE_POLICIES_HPP_INCLUDED |
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#define BOOST_LOCKFREE_POLICIES_HPP_INCLUDED |
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#include <boost/parameter/template_keyword.hpp> |
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#include <boost/mpl/bool.hpp> |
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#include <boost/mpl/size_t.hpp> |
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namespace boost { |
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namespace lockfree { |
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#ifndef BOOST_DOXYGEN_INVOKED |
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namespace tag { struct allocator ; } |
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namespace tag { struct fixed_sized; } |
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namespace tag { struct capacity; } |
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#endif |
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/** Configures a data structure as \b fixed-sized. |
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* |
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* The internal nodes are stored inside an array and they are addressed by array indexing. This limits the possible size of the |
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* queue to the number of elements that can be addressed by the index type (usually 2**16-2), but on platforms that lack |
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* double-width compare-and-exchange instructions, this is the best way to achieve lock-freedom. |
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* This implies that a data structure is bounded. |
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* */ |
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template <bool IsFixedSized> |
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struct fixed_sized: |
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boost::parameter::template_keyword<tag::fixed_sized, boost::mpl::bool_<IsFixedSized> > |
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{}; |
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/** Sets the \b capacity of a data structure at compile-time. |
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* |
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* This implies that a data structure is bounded and fixed-sized. |
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* */ |
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template <size_t Size> |
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struct capacity: |
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boost::parameter::template_keyword<tag::capacity, boost::mpl::size_t<Size> > |
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{}; |
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/** Defines the \b allocator type of a data structure. |
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* */ |
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template <class Alloc> |
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struct allocator: |
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boost::parameter::template_keyword<tag::allocator, Alloc> |
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{}; |
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} |
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} |
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#endif /* BOOST_LOCKFREE_POLICIES_HPP_INCLUDED */
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