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1 | // |
2 | // detail/null_mutex.hpp | |
3 | // ~~~~~~~~~~~~~~~~~~~~~ | |
4 | // | |
92f5a8d4 | 5 | // Copyright (c) 2003-2019 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
7c673cae FG |
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_NULL_MUTEX_HPP | |
12 | #define BOOST_ASIO_DETAIL_NULL_MUTEX_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 | ||
22 | #include <boost/asio/detail/noncopyable.hpp> | |
23 | #include <boost/asio/detail/scoped_lock.hpp> | |
24 | ||
25 | #include <boost/asio/detail/push_options.hpp> | |
26 | ||
27 | namespace boost { | |
28 | namespace asio { | |
29 | namespace detail { | |
30 | ||
31 | class null_mutex | |
32 | : private noncopyable | |
33 | { | |
34 | public: | |
35 | typedef boost::asio::detail::scoped_lock<null_mutex> scoped_lock; | |
36 | ||
37 | // Constructor. | |
38 | null_mutex() | |
39 | { | |
40 | } | |
41 | ||
42 | // Destructor. | |
43 | ~null_mutex() | |
44 | { | |
45 | } | |
46 | ||
47 | // Lock the mutex. | |
48 | void lock() | |
49 | { | |
50 | } | |
51 | ||
52 | // Unlock the mutex. | |
53 | void unlock() | |
54 | { | |
55 | } | |
56 | }; | |
57 | ||
58 | } // namespace detail | |
59 | } // namespace asio | |
60 | } // namespace boost | |
61 | ||
62 | #include <boost/asio/detail/pop_options.hpp> | |
63 | ||
64 | #endif // !defined(BOOST_ASIO_HAS_THREADS) | |
65 | ||
66 | #endif // BOOST_ASIO_DETAIL_NULL_MUTEX_HPP |