global.hpp
1.23 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
//
// detail/global.hpp
// ~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2020 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_GLOBAL_HPP
#define ASIO_DETAIL_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_THREADS)
# include "asio/detail/null_global.hpp"
#elif defined(ASIO_WINDOWS)
# include "asio/detail/win_global.hpp"
#elif defined(ASIO_HAS_PTHREADS)
# include "asio/detail/posix_global.hpp"
#elif defined(ASIO_HAS_STD_CALL_ONCE)
# include "asio/detail/std_global.hpp"
#else
# error Only Windows, POSIX and std::call_once are supported!
#endif
namespace asio {
namespace detail {
template <typename T>
inline T& global()
{
#if !defined(ASIO_HAS_THREADS)
return null_global<T>();
#elif defined(ASIO_WINDOWS)
return win_global<T>();
#elif defined(ASIO_HAS_PTHREADS)
return posix_global<T>();
#elif defined(ASIO_HAS_STD_CALL_ONCE)
return std_global<T>();
#endif
}
} // namespace detail
} // namespace asio
#endif // ASIO_DETAIL_GLOBAL_HPP