63e88f80
 Hu Chunming
提交三方库
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//
// detail/global.hpp
// ~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2022 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 BOOST_ASIO_DETAIL_GLOBAL_HPP
#define BOOST_ASIO_DETAIL_GLOBAL_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include <boost/asio/detail/config.hpp>
#if !defined(BOOST_ASIO_HAS_THREADS)
# include <boost/asio/detail/null_global.hpp>
#elif defined(BOOST_ASIO_WINDOWS)
# include <boost/asio/detail/win_global.hpp>
#elif defined(BOOST_ASIO_HAS_PTHREADS)
# include <boost/asio/detail/posix_global.hpp>
#elif defined(BOOST_ASIO_HAS_STD_CALL_ONCE)
# include <boost/asio/detail/std_global.hpp>
#else
# error Only Windows, POSIX and std::call_once are supported!
#endif
namespace boost {
namespace asio {
namespace detail {
template <typename T>
inline T& global()
{
#if !defined(BOOST_ASIO_HAS_THREADS)
return null_global<T>();
#elif defined(BOOST_ASIO_WINDOWS)
return win_global<T>();
#elif defined(BOOST_ASIO_HAS_PTHREADS)
return posix_global<T>();
#elif defined(BOOST_ASIO_HAS_STD_CALL_ONCE)
return std_global<T>();
#endif
}
} // namespace detail
} // namespace asio
} // namespace boost
#endif // BOOST_ASIO_DETAIL_GLOBAL_HPP
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