ceph/src/boost/boost/atomic/detail/once_flag.hpp

   1 /*
   2  * Distributed under the Boost Software License, Version 1.0.
   3  * (See accompanying file LICENSE_1_0.txt or copy at
   4  * http://www.boost.org/LICENSE_1_0.txt)
   5  *
   6  * Copyright (c) 2020 Andrey Semashev
   7  */
   8 /*!
   9  * \file   atomic/detail/once_flag.hpp
  10  *
  11  * This header declares \c once_flag structure for controlling one time initialization
  12  */
  13
  14 #ifndef BOOST_ATOMIC_DETAIL_ONCE_FLAG_HPP_INCLUDED_
  15 #define BOOST_ATOMIC_DETAIL_ONCE_FLAG_HPP_INCLUDED_
  16
  17 #include <boost/atomic/detail/config.hpp>
  18 #include <boost/atomic/detail/aligned_variable.hpp>
  19 #include <boost/atomic/detail/core_operations.hpp>
  20 #include <boost/atomic/detail/header.hpp>
  21
  22 #ifdef BOOST_HAS_PRAGMA_ONCE
  23 #pragma once
  24 #endif
  25
  26 namespace boost {
  27 namespace atomics {
  28 namespace detail {
  29
  30 typedef atomics::detail::core_operations< 1u, false, false > once_flag_operations;
  31
  32 struct once_flag
  33 {
  34     BOOST_ATOMIC_DETAIL_ALIGNED_VAR(once_flag_operations::storage_alignment, once_flag_operations::storage_type, m_flag);
  35 };
  36
  37 } // namespace detail
  38 } // namespace atomics
  39 } // namespace boost
  40
  41 #include <boost/atomic/detail/footer.hpp>
  42
  43 #endif // BOOST_ATOMIC_DETAIL_ONCE_FLAG_HPP_INCLUDED_