ceph/src/boost/libs/signals2/include/boost/signals2/detail/lwm_pthreads.hpp

   1 //
   2 //  boost/signals2/detail/lwm_pthreads.hpp
   3 //
   4 //  Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
   5 //  Copyright (c) 2008 Frank Mori Hess
   6 //
   7 // Distributed under the Boost Software License, Version 1.0. (See
   8 // accompanying file LICENSE_1_0.txt or copy at
   9 // http://www.boost.org/LICENSE_1_0.txt)
  10 //
  11
  12 #ifndef BOOST_SIGNALS2_LWM_PTHREADS_HPP
  13 #define BOOST_SIGNALS2_LWM_PTHREADS_HPP
  14
  15 // MS compatible compilers support #pragma once
  16
  17 #if defined(_MSC_VER)
  18 # pragma once
  19 #endif
  20
  21 #include <boost/assert.hpp>
  22 #include <pthread.h>
  23
  24 namespace boost
  25 {
  26
  27 namespace signals2
  28 {
  29
  30 class mutex
  31 {
  32 private:
  33
  34     pthread_mutex_t m_;
  35
  36     mutex(mutex const &);
  37     mutex & operator=(mutex const &);
  38
  39 public:
  40
  41     mutex()
  42     {
  43
  44 // HPUX 10.20 / DCE has a nonstandard pthread_mutex_init
  45
  46 #if defined(__hpux) && defined(_DECTHREADS_)
  47         BOOST_VERIFY(pthread_mutex_init(&m_, pthread_mutexattr_default) == 0);
  48 #else
  49         BOOST_VERIFY(pthread_mutex_init(&m_, 0) == 0);
  50 #endif
  51     }
  52
  53     ~mutex()
  54     {
  55         BOOST_VERIFY(pthread_mutex_destroy(&m_) == 0);
  56     }
  57
  58     void lock()
  59     {
  60         BOOST_VERIFY(pthread_mutex_lock(&m_) == 0);
  61     }
  62
  63     bool try_lock()
  64     {
  65         return pthread_mutex_trylock(&m_) == 0;
  66     }
  67
  68     void unlock()
  69     {
  70         BOOST_VERIFY(pthread_mutex_unlock(&m_) == 0);
  71     }
  72 };
  73
  74 } // namespace signals2
  75
  76 } // namespace boost
  77
  78 #endif // #ifndef BOOST_SIGNALS2_LWM_PTHREADS_HPP