1 //
2 // detail/posix_mutex.hpp
3 // ~~~~~~~~~~~~~~~~~~~~~~
4 //
5 // Copyright (c) 2003-2021 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_POSIX_MUTEX_HPP
12 #define BOOST_ASIO_DETAIL_POSIX_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_PTHREADS)
21 
22 #include <pthread.h>
23 #include <boost/asio/detail/noncopyable.hpp>
24 #include <boost/asio/detail/scoped_lock.hpp>
25 
26 #include <boost/asio/detail/push_options.hpp>
27 
28 namespace boost {
29 namespace asio {
30 namespace detail {
31 
32 class posix_event;
33 
34 class posix_mutex
35   : private noncopyable
36 {
37 public:
38   typedef boost::asio::detail::scoped_lock<posix_mutex> scoped_lock;
39 
40   // Constructor.
41   BOOST_ASIO_DECL posix_mutex();
42 
43   // Destructor.
~posix_mutex()44   ~posix_mutex()
45   {
46     ::pthread_mutex_destroy(&mutex_); // Ignore EBUSY.
47   }
48 
49   // Lock the mutex.
lock()50   void lock()
51   {
52     (void)::pthread_mutex_lock(&mutex_); // Ignore EINVAL.
53   }
54 
55   // Unlock the mutex.
unlock()56   void unlock()
57   {
58     (void)::pthread_mutex_unlock(&mutex_); // Ignore EINVAL.
59   }
60 
61 private:
62   friend class posix_event;
63   ::pthread_mutex_t mutex_;
64 };
65 
66 } // namespace detail
67 } // namespace asio
68 } // namespace boost
69 
70 #include <boost/asio/detail/pop_options.hpp>
71 
72 #if defined(BOOST_ASIO_HEADER_ONLY)
73 # include <boost/asio/detail/impl/posix_mutex.ipp>
74 #endif // defined(BOOST_ASIO_HEADER_ONLY)
75 
76 #endif // defined(BOOST_ASIO_HAS_PTHREADS)
77 
78 #endif // BOOST_ASIO_DETAIL_POSIX_MUTEX_HPP
79