1 | // |
2 | // detail/atomic_count.hpp |
3 | // ~~~~~~~~~~~~~~~~~~~~~~~ |
4 | // |
5 | // Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
6 | // |
7 | // Distributed under the Boost Software License, Version 1.0. (See accompanying |
8 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
9 | // |
10 | |
11 | #ifndef BOOST_ASIO_DETAIL_ATOMIC_COUNT_HPP |
12 | #define BOOST_ASIO_DETAIL_ATOMIC_COUNT_HPP |
13 | |
14 | #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
15 | # pragma once |
16 | #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
17 | |
18 | #include <boost/asio/detail/config.hpp> |
19 | |
20 | #if !defined(BOOST_ASIO_HAS_THREADS) |
21 | // Nothing to include. |
22 | #elif defined(BOOST_ASIO_HAS_STD_ATOMIC) |
23 | # include <atomic> |
24 | #else // defined(BOOST_ASIO_HAS_STD_ATOMIC) |
25 | # include <boost/detail/atomic_count.hpp> |
26 | #endif // defined(BOOST_ASIO_HAS_STD_ATOMIC) |
27 | |
28 | namespace boost { |
29 | namespace asio { |
30 | namespace detail { |
31 | |
32 | #if !defined(BOOST_ASIO_HAS_THREADS) |
33 | typedef long atomic_count; |
34 | inline void increment(atomic_count& a, long b) { a += b; } |
35 | #elif defined(BOOST_ASIO_HAS_STD_ATOMIC) |
36 | typedef std::atomic<long> atomic_count; |
37 | inline void increment(atomic_count& a, long b) { a += b; } |
38 | #else // defined(BOOST_ASIO_HAS_STD_ATOMIC) |
39 | typedef boost::detail::atomic_count atomic_count; |
40 | inline void increment(atomic_count& a, long b) { while (b > 0) ++a, --b; } |
41 | #endif // defined(BOOST_ASIO_HAS_STD_ATOMIC) |
42 | |
43 | } // namespace detail |
44 | } // namespace asio |
45 | } // namespace boost |
46 | |
47 | #endif // BOOST_ASIO_DETAIL_ATOMIC_COUNT_HPP |
48 | |