boost/boost/detail/lwm_pthreads.hpp

   1 #ifndef BOOST_DETAIL_LWM_PTHREADS_HPP_INCLUDED
   2 #define BOOST_DETAIL_LWM_PTHREADS_HPP_INCLUDED
   3
   4 #if _MSC_VER >= 1020
   5 #pragma once
   6 #endif
   7
   8 //
   9 //  boost/detail/lwm_pthreads.hpp
  10 //
  11 //  Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
  12 //
  13 //  Permission to copy, use, modify, sell and distribute this software
  14 //  is granted provided this copyright notice appears in all copies.
  15 //  This software is provided "as is" without express or implied
  16 //  warranty, and with no claim as to its suitability for any purpose.
  17 //
  18
  19 #include <pthread.h>
  20
  21 namespace boost
  22 {
  23
  24 namespace detail
  25 {
  26
  27 class lightweight_mutex
  28 {
  29 private:
  30
  31     pthread_mutex_t m_;
  32
  33     lightweight_mutex(lightweight_mutex const &);
  34     lightweight_mutex & operator=(lightweight_mutex const &);
  35
  36 public:
  37
  38     lightweight_mutex()
  39     {
  40         pthread_mutex_init(&m_, 0);
  41     }
  42
  43     ~lightweight_mutex()
  44     {
  45         pthread_mutex_destroy(&m_);
  46     }
  47
  48     class scoped_lock;
  49     friend class scoped_lock;
  50
  51     class scoped_lock
  52     {
  53     private:
  54
  55         pthread_mutex_t & m_;
  56
  57         scoped_lock(scoped_lock const &);
  58         scoped_lock & operator=(scoped_lock const &);
  59
  60     public:
  61
  62         scoped_lock(lightweight_mutex & m): m_(m.m_)
  63         {
  64             pthread_mutex_lock(&m_);
  65         }
  66
  67         ~scoped_lock()
  68         {
  69             pthread_mutex_unlock(&m_);
  70         }
  71     };
  72 };
  73
  74 } // namespace detail
  75
  76 } // namespace boost
  77
  78 #endif // #ifndef BOOST_DETAIL_LWM_PTHREADS_HPP_INCLUDED