63e88f80
 Hu Chunming
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/*
* 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) 2020 Andrey Semashev
*/
/*!
* \file atomic/ipc_atomic.hpp
*
* This header contains definition of \c ipc_atomic template.
*/
#ifndef BOOST_ATOMIC_IPC_ATOMIC_HPP_INCLUDED_
#define BOOST_ATOMIC_IPC_ATOMIC_HPP_INCLUDED_
#include <cstddef>
#include <boost/static_assert.hpp>
#include <boost/memory_order.hpp>
#include <boost/atomic/capabilities.hpp>
#include <boost/atomic/detail/config.hpp>
#include <boost/atomic/detail/classify.hpp>
#include <boost/atomic/detail/atomic_impl.hpp>
#include <boost/atomic/detail/type_traits/is_trivially_copyable.hpp>
#include <boost/atomic/detail/type_traits/is_nothrow_default_constructible.hpp>
#include <boost/atomic/detail/header.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
#pragma once
#endif
namespace boost {
namespace atomics {
//! Atomic object for inter-process communication
template< typename T >
class ipc_atomic :
public atomics::detail::base_atomic< T, typename atomics::detail::classify< T >::type, true >
{
private:
typedef atomics::detail::base_atomic< T, typename atomics::detail::classify< T >::type, true > base_type;
typedef typename base_type::value_arg_type value_arg_type;
public:
typedef typename base_type::value_type value_type;
BOOST_STATIC_ASSERT_MSG(sizeof(value_type) > 0u, "boost::ipc_atomic<T> requires T to be a complete type");
#if !defined(BOOST_ATOMIC_DETAIL_NO_CXX11_IS_TRIVIALLY_COPYABLE)
BOOST_STATIC_ASSERT_MSG(atomics::detail::is_trivially_copyable< value_type >::value, "boost::ipc_atomic<T> requires T to be a trivially copyable type");
#endif
public:
BOOST_FORCEINLINE BOOST_ATOMIC_DETAIL_CONSTEXPR_UNION_INIT ipc_atomic() BOOST_NOEXCEPT_IF(atomics::detail::is_nothrow_default_constructible< value_type >::value) : base_type()
{
}
BOOST_FORCEINLINE BOOST_ATOMIC_DETAIL_CONSTEXPR_UNION_INIT ipc_atomic(value_arg_type v) BOOST_NOEXCEPT : base_type(v)
{
}
BOOST_FORCEINLINE value_type operator= (value_arg_type v) BOOST_NOEXCEPT
{
this->store(v);
return v;
}
BOOST_FORCEINLINE value_type operator= (value_arg_type v) volatile BOOST_NOEXCEPT
{
this->store(v);
return v;
}
BOOST_FORCEINLINE operator value_type() const volatile BOOST_NOEXCEPT
{
return this->load();
}
BOOST_DELETED_FUNCTION(ipc_atomic(ipc_atomic const&))
BOOST_DELETED_FUNCTION(ipc_atomic& operator= (ipc_atomic const&))
BOOST_DELETED_FUNCTION(ipc_atomic& operator= (ipc_atomic const&) volatile)
};
} // namespace atomics
using atomics::ipc_atomic;
} // namespace boost
#include <boost/atomic/detail/footer.hpp>
#endif // BOOST_ATOMIC_IPC_ATOMIC_HPP_INCLUDED_
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