Initial Commit - Lesson 31 (Commit #1)

Plugins/GameLiftServerSDK/ThirdParty/concurrentqueue/benchmarks/boost/lockfree/policies.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_POLICIES_HPP_INCLUDED
+#define BOOST_LOCKFREE_POLICIES_HPP_INCLUDED
+
+#include <boost/parameter.hpp>
+#include <boost/mpl/bool.hpp>
+#include <boost/mpl/size_t.hpp>
+#include <boost/mpl/void.hpp>
+
+namespace boost {
+namespace lockfree {
+
+#ifndef BOOST_DOXYGEN_INVOKED
+namespace tag { struct allocator ; }
+namespace tag { struct fixed_sized; }
+namespace tag { struct capacity; }
+
+#endif
+
+/** Configures a data structure as \b fixed-sized.
+ *
+ *  The internal nodes are stored inside an array and they are addressed by array indexing. This limits the possible size of the
+ *  queue to the number of elements that can be addressed by the index type (usually 2**16-2), but on platforms that lack
+ *  double-width compare-and-exchange instructions, this is the best way to achieve lock-freedom.
+ *  This implies that a data structure is bounded.
+ * */
+template <bool IsFixedSized>
+struct fixed_sized:
+    boost::parameter::template_keyword<tag::fixed_sized, boost::mpl::bool_<IsFixedSized> >
+{};
+
+/** Sets the \b capacity of a data structure at compile-time.
+ *
+ * This implies that a data structure is bounded and fixed-sized.
+ * */
+template <size_t Size>
+struct capacity:
+    boost::parameter::template_keyword<tag::capacity, boost::mpl::size_t<Size> >
+{};
+
+/** Defines the \b allocator type of a data structure.
+ * */
+template <class Alloc>
+struct allocator:
+    boost::parameter::template_keyword<tag::allocator, Alloc>
+{};
+
+}
+}
+
+#endif /* BOOST_LOCKFREE_POLICIES_HPP_INCLUDED */
+