53 lines
1.2 KiB
C++
53 lines
1.2 KiB
C++
//
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// detail/global.hpp
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// ~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2021 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef ASIO_DETAIL_GLOBAL_HPP
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#define ASIO_DETAIL_GLOBAL_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include "asio/detail/config.hpp"
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#if !defined(ASIO_HAS_THREADS)
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# include "asio/detail/null_global.hpp"
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#elif defined(ASIO_WINDOWS)
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# include "asio/detail/win_global.hpp"
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#elif defined(ASIO_HAS_PTHREADS)
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# include "asio/detail/posix_global.hpp"
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#elif defined(ASIO_HAS_STD_CALL_ONCE)
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# include "asio/detail/std_global.hpp"
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#else
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# error Only Windows, POSIX and std::call_once are supported!
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#endif
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namespace asio {
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namespace detail {
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template <typename T>
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inline T& global()
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{
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#if !defined(ASIO_HAS_THREADS)
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return null_global<T>();
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#elif defined(ASIO_WINDOWS)
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return win_global<T>();
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#elif defined(ASIO_HAS_PTHREADS)
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return posix_global<T>();
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#elif defined(ASIO_HAS_STD_CALL_ONCE)
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return std_global<T>();
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#endif
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}
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} // namespace detail
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} // namespace asio
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#endif // ASIO_DETAIL_GLOBAL_HPP
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