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-rw-r--r--lib/asio/detail/std_global.hpp70
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diff --git a/lib/asio/detail/std_global.hpp b/lib/asio/detail/std_global.hpp
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--- a/lib/asio/detail/std_global.hpp
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-//
-// detail/std_global.hpp
-// ~~~~~~~~~~~~~~~~~~~~~
-//
-// Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com)
-//
-// 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 ASIO_DETAIL_STD_GLOBAL_HPP
-#define ASIO_DETAIL_STD_GLOBAL_HPP
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1200)
-# pragma once
-#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
-
-#include "asio/detail/config.hpp"
-
-#if defined(ASIO_HAS_STD_CALL_ONCE)
-
-#include <exception>
-#include <mutex>
-
-#include "asio/detail/push_options.hpp"
-
-namespace asio {
-namespace detail {
-
-template <typename T>
-struct std_global_impl
-{
- // Helper function to perform initialisation.
- static void do_init()
- {
- instance_.ptr_ = new T;
- }
-
- // Destructor automatically cleans up the global.
- ~std_global_impl()
- {
- delete ptr_;
- }
-
- static std::once_flag init_once_;
- static std_global_impl instance_;
- T* ptr_;
-};
-
-template <typename T>
-std::once_flag std_global_impl<T>::init_once_;
-
-template <typename T>
-std_global_impl<T> std_global_impl<T>::instance_;
-
-template <typename T>
-T& std_global()
-{
- std::call_once(std_global_impl<T>::init_once_, &std_global_impl<T>::do_init);
- return *std_global_impl<T>::instance_.ptr_;
-}
-
-} // namespace detail
-} // namespace asio
-
-#include "asio/detail/pop_options.hpp"
-
-#endif // defined(ASIO_HAS_STD_CALL_ONCE)
-
-#endif // ASIO_DETAIL_STD_GLOBAL_HPP