--- /dev/null
+/*
+ * 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)
+ *
+ * Copyright (c) 2014 Andrey Semashev
+ */
+/*!
+ * \file atomic/detail/core_ops_cas_based.hpp
+ *
+ * This header contains CAS-based implementation of core atomic operations.
+ */
+
+#ifndef BOOST_ATOMIC_DETAIL_CORE_OPS_CAS_BASED_HPP_INCLUDED_
+#define BOOST_ATOMIC_DETAIL_CORE_OPS_CAS_BASED_HPP_INCLUDED_
+
+#include <boost/memory_order.hpp>
+#include <boost/atomic/detail/config.hpp>
+#include <boost/atomic/detail/header.hpp>
+
+#ifdef BOOST_HAS_PRAGMA_ONCE
+#pragma once
+#endif
+
+namespace boost {
+namespace atomics {
+namespace detail {
+
+template< typename Base >
+struct core_operations_cas_based :
+ public Base
+{
+ typedef typename Base::storage_type storage_type;
+
+ static BOOST_CONSTEXPR_OR_CONST bool full_cas_based = true;
+
+ static BOOST_FORCEINLINE storage_type fetch_add(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
+ {
+ storage_type old_val;
+ atomics::detail::non_atomic_load(storage, old_val);
+ while (!Base::compare_exchange_weak(storage, old_val, old_val + v, order, memory_order_relaxed)) {}
+ return old_val;
+ }
+
+ static BOOST_FORCEINLINE storage_type fetch_sub(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
+ {
+ storage_type old_val;
+ atomics::detail::non_atomic_load(storage, old_val);
+ while (!Base::compare_exchange_weak(storage, old_val, old_val - v, order, memory_order_relaxed)) {}
+ return old_val;
+ }
+
+ static BOOST_FORCEINLINE storage_type fetch_and(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
+ {
+ storage_type old_val;
+ atomics::detail::non_atomic_load(storage, old_val);
+ while (!Base::compare_exchange_weak(storage, old_val, old_val & v, order, memory_order_relaxed)) {}
+ return old_val;
+ }
+
+ static BOOST_FORCEINLINE storage_type fetch_or(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
+ {
+ storage_type old_val;
+ atomics::detail::non_atomic_load(storage, old_val);
+ while (!Base::compare_exchange_weak(storage, old_val, old_val | v, order, memory_order_relaxed)) {}
+ return old_val;
+ }
+
+ static BOOST_FORCEINLINE storage_type fetch_xor(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT
+ {
+ storage_type old_val;
+ atomics::detail::non_atomic_load(storage, old_val);
+ while (!Base::compare_exchange_weak(storage, old_val, old_val ^ v, order, memory_order_relaxed)) {}
+ return old_val;
+ }
+
+ static BOOST_FORCEINLINE bool test_and_set(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT
+ {
+ return !!Base::exchange(storage, (storage_type)1, order);
+ }
+
+ static BOOST_FORCEINLINE void clear(storage_type volatile& storage, memory_order order) BOOST_NOEXCEPT
+ {
+ Base::store(storage, (storage_type)0, order);
+ }
+};
+
+} // namespace detail
+} // namespace atomics
+} // namespace boost
+
+#include <boost/atomic/detail/footer.hpp>
+
+#endif // BOOST_ATOMIC_DETAIL_CORE_OPS_CAS_BASED_HPP_INCLUDED_