boost/asio/detail/posix_mutex.hpp

   1 //
   2 // posix_mutex.hpp
   3 // ~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2008 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/push_options.hpp>
  19
  20 #include <boost/asio/detail/push_options.hpp>
  21 #include <boost/config.hpp>
  22 #include <boost/system/system_error.hpp>
  23 #include <boost/asio/detail/pop_options.hpp>
  24
  25 #if defined(BOOST_HAS_PTHREADS)
  26
  27 #include <boost/asio/detail/push_options.hpp>
  28 #include <boost/throw_exception.hpp>
  29 #include <pthread.h>
  30 #include <boost/asio/detail/pop_options.hpp>
  31
  32 #include <boost/asio/error.hpp>
  33 #include <boost/asio/detail/noncopyable.hpp>
  34 #include <boost/asio/detail/scoped_lock.hpp>
  35
  36 namespace boost {
  37 namespace asio {
  38 namespace detail {
  39
  40 class posix_event;
  41
  42 class posix_mutex
  43   : private noncopyable
  44 {
  45 public:
  46   typedef boost::asio::detail::scoped_lock<posix_mutex> scoped_lock;
  47
  48   // Constructor.
  49   posix_mutex()
  50   {
  51     int error = ::pthread_mutex_init(&mutex_, 0);
  52     if (error != 0)
  53     {
  54       boost::system::system_error e(
  55           boost::system::error_code(error,
  56             boost::asio::error::get_system_category()),
  57           "mutex");
  58       boost::throw_exception(e);
  59     }
  60   }
  61
  62   // Destructor.
  63   ~posix_mutex()
  64   {
  65     ::pthread_mutex_destroy(&mutex_);
  66   }
  67
  68   // Lock the mutex.
  69   void lock()
  70   {
  71     int error = ::pthread_mutex_lock(&mutex_);
  72     if (error != 0)
  73     {
  74       boost::system::system_error e(
  75           boost::system::error_code(error,
  76             boost::asio::error::get_system_category()),
  77           "mutex");
  78       boost::throw_exception(e);
  79     }
  80   }
  81
  82   // Unlock the mutex.
  83   void unlock()
  84   {
  85     int error = ::pthread_mutex_unlock(&mutex_);
  86     if (error != 0)
  87     {
  88       boost::system::system_error e(
  89           boost::system::error_code(error,
  90             boost::asio::error::get_system_category()),
  91           "mutex");
  92       boost::throw_exception(e);
  93     }
  94   }
  95
  96 private:
  97   friend class posix_event;
  98   ::pthread_mutex_t mutex_;
  99 };
 100
 101 } // namespace detail
 102 } // namespace asio
 103 } // namespace boost
 104
 105 #endif // defined(BOOST_HAS_PTHREADS)
 106
 107 #include <boost/asio/detail/pop_options.hpp>
 108
 109 #endif // BOOST_ASIO_DETAIL_POSIX_MUTEX_HPP