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Diffstat (limited to 'src/third_party/boost-1.60.0/boost/atomic/detail/atomic_flag.hpp')
-rw-r--r-- | src/third_party/boost-1.60.0/boost/atomic/detail/atomic_flag.hpp | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/src/third_party/boost-1.60.0/boost/atomic/detail/atomic_flag.hpp b/src/third_party/boost-1.60.0/boost/atomic/detail/atomic_flag.hpp new file mode 100644 index 00000000000..7fb44cdb1a6 --- /dev/null +++ b/src/third_party/boost-1.60.0/boost/atomic/detail/atomic_flag.hpp @@ -0,0 +1,70 @@ +/* + * 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/atomic_flag.hpp + * + * This header contains interface definition of \c atomic_flag. + */ + +#ifndef BOOST_ATOMIC_DETAIL_ATOMIC_FLAG_HPP_INCLUDED_ +#define BOOST_ATOMIC_DETAIL_ATOMIC_FLAG_HPP_INCLUDED_ + +#include <boost/assert.hpp> +#include <boost/memory_order.hpp> +#include <boost/atomic/detail/config.hpp> +#include <boost/atomic/detail/operations_lockfree.hpp> + +#ifdef BOOST_HAS_PRAGMA_ONCE +#pragma once +#endif + +/* + * IMPLEMENTATION NOTE: All interface functions MUST be declared with BOOST_FORCEINLINE, + * see comment for convert_memory_order_to_gcc in ops_gcc_atomic.hpp. + */ + +namespace boost { +namespace atomics { + +#if defined(BOOST_NO_CXX11_CONSTEXPR) || defined(BOOST_NO_CXX11_UNIFIED_INITIALIZATION_SYNTAX) +#define BOOST_ATOMIC_NO_ATOMIC_FLAG_INIT +#else +#define BOOST_ATOMIC_FLAG_INIT {} +#endif + +struct atomic_flag +{ + typedef atomics::detail::operations< 1u, false > operations; + typedef operations::storage_type storage_type; + + operations::aligned_storage_type m_storage; + + BOOST_FORCEINLINE BOOST_CONSTEXPR atomic_flag() BOOST_NOEXCEPT : m_storage(0) + { + } + + BOOST_FORCEINLINE bool test_and_set(memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT + { + return operations::test_and_set(m_storage.value, order); + } + + BOOST_FORCEINLINE void clear(memory_order order = memory_order_seq_cst) volatile BOOST_NOEXCEPT + { + BOOST_ASSERT(order != memory_order_acquire); + BOOST_ASSERT(order != memory_order_acq_rel); + operations::clear(m_storage.value, order); + } + + BOOST_DELETED_FUNCTION(atomic_flag(atomic_flag const&)) + BOOST_DELETED_FUNCTION(atomic_flag& operator= (atomic_flag const&)) +}; + +} // namespace atomics +} // namespace boost + +#endif // BOOST_ATOMIC_DETAIL_ATOMIC_FLAG_HPP_INCLUDED_ |