ceph/src/boost/boost/interprocess/sync/posix/pthread_helpers.hpp

   1 //////////////////////////////////////////////////////////////////////////////
   2 //
   3 // (C) Copyright Ion Gaztanaga 2005-2012. Distributed under the Boost
   4 // Software License, Version 1.0. (See accompanying file
   5 // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 //
   7 // See http://www.boost.org/libs/interprocess for documentation.
   8 //
   9 //////////////////////////////////////////////////////////////////////////////
  10
  11 #ifndef BOOST_INTERPROCESS_PTHREAD_HELPERS_HPP
  12 #define BOOST_INTERPROCESS_PTHREAD_HELPERS_HPP
  13
  14 #ifndef BOOST_CONFIG_HPP
  15 #  include <boost/config.hpp>
  16 #endif
  17 #
  18 #if defined(BOOST_HAS_PRAGMA_ONCE)
  19 #  pragma once
  20 #endif
  21
  22 #include <boost/interprocess/detail/config_begin.hpp>
  23 #include <boost/interprocess/detail/workaround.hpp>
  24
  25 #include <pthread.h>
  26 #include <errno.h>
  27 #include <boost/interprocess/exceptions.hpp>
  28
  29 namespace boost {
  30 namespace interprocess {
  31 namespace ipcdetail{
  32
  33    #if defined BOOST_INTERPROCESS_POSIX_PROCESS_SHARED
  34
  35    //!Makes pthread_mutexattr_t cleanup easy when using exceptions
  36    struct mutexattr_wrapper
  37    {
  38       //!Constructor
  39       mutexattr_wrapper(bool recursive = false)
  40       {
  41          if(pthread_mutexattr_init(&m_attr)!=0 ||
  42             pthread_mutexattr_setpshared(&m_attr, PTHREAD_PROCESS_SHARED)!= 0 ||
  43              (recursive &&
  44               pthread_mutexattr_settype(&m_attr, PTHREAD_MUTEX_RECURSIVE)!= 0 ))
  45             throw interprocess_exception("pthread_mutexattr_xxxx failed");
  46       }
  47
  48       //!Destructor
  49      ~mutexattr_wrapper()  {  pthread_mutexattr_destroy(&m_attr);  }
  50
  51       //!This allows using mutexattr_wrapper as pthread_mutexattr_t
  52       operator pthread_mutexattr_t&()  {  return m_attr;  }
  53
  54       pthread_mutexattr_t m_attr;
  55    };
  56
  57    //!Makes pthread_condattr_t cleanup easy when using exceptions
  58    struct condattr_wrapper
  59    {
  60       //!Constructor
  61       condattr_wrapper()
  62       {
  63          if(pthread_condattr_init(&m_attr)!=0 ||
  64             pthread_condattr_setpshared(&m_attr, PTHREAD_PROCESS_SHARED)!= 0)
  65             throw interprocess_exception("pthread_condattr_xxxx failed");
  66       }
  67
  68       //!Destructor
  69      ~condattr_wrapper() { pthread_condattr_destroy(&m_attr); }
  70
  71       //!This allows using condattr_wrapper as pthread_condattr_t
  72       operator pthread_condattr_t&(){  return m_attr;  }
  73
  74       pthread_condattr_t m_attr;
  75    };
  76
  77    //!Makes initialized pthread_mutex_t cleanup easy when using exceptions
  78    class mutex_initializer
  79    {
  80     public:
  81       //!Constructor. Takes interprocess_mutex attributes to initialize the interprocess_mutex
  82       mutex_initializer(pthread_mutex_t &mut, pthread_mutexattr_t &mut_attr)
  83       : mp_mut(&mut)
  84       {
  85          if(pthread_mutex_init(mp_mut, &mut_attr) != 0)
  86             throw interprocess_exception("pthread_mutex_init failed");
  87       }
  88
  89      ~mutex_initializer() {  if(mp_mut) pthread_mutex_destroy(mp_mut);  }
  90
  91       void release() {mp_mut = 0; }
  92
  93     private:
  94       pthread_mutex_t *mp_mut;
  95    };
  96
  97    //!Makes initialized pthread_cond_t cleanup easy when using exceptions
  98    class condition_initializer
  99    {
 100     public:
 101       condition_initializer(pthread_cond_t &cond, pthread_condattr_t &cond_attr)
 102       : mp_cond(&cond)
 103       {
 104          if(pthread_cond_init(mp_cond, &cond_attr)!= 0)
 105             throw interprocess_exception("pthread_cond_init failed");
 106       }
 107
 108      ~condition_initializer()   {  if(mp_cond) pthread_cond_destroy(mp_cond);  }
 109
 110       void release()       { mp_cond = 0; }
 111
 112     private:
 113       pthread_cond_t *mp_cond;
 114    };
 115
 116    #endif   //   #if defined BOOST_INTERPROCESS_POSIX_PROCESS_SHARED
 117
 118    #if defined(BOOST_INTERPROCESS_POSIX_BARRIERS) && defined(BOOST_INTERPROCESS_POSIX_PROCESS_SHARED)
 119
 120    //!Makes pthread_barrierattr_t cleanup easy when using exceptions
 121    struct barrierattr_wrapper
 122    {
 123       //!Constructor
 124       barrierattr_wrapper()
 125       {
 126          if(pthread_barrierattr_init(&m_attr)!=0 ||
 127             pthread_barrierattr_setpshared(&m_attr, PTHREAD_PROCESS_SHARED)!= 0)
 128             throw interprocess_exception("pthread_barrierattr_xxx failed");
 129       }
 130
 131       //!Destructor
 132      ~barrierattr_wrapper()  {  pthread_barrierattr_destroy(&m_attr);  }
 133
 134       //!This allows using mutexattr_wrapper as pthread_barrierattr_t
 135       operator pthread_barrierattr_t&()  {  return m_attr;  }
 136
 137       pthread_barrierattr_t m_attr;
 138    };
 139
 140    //!Makes initialized pthread_barrier_t cleanup easy when using exceptions
 141    class barrier_initializer
 142    {
 143     public:
 144       //!Constructor. Takes barrier attributes to initialize the barrier
 145       barrier_initializer(pthread_barrier_t &mut,
 146                           pthread_barrierattr_t &mut_attr,
 147                           int count)
 148       : mp_barrier(&mut)
 149       {
 150          if(pthread_barrier_init(mp_barrier, &mut_attr, count) != 0)
 151             throw interprocess_exception("pthread_barrier_init failed");
 152       }
 153
 154      ~barrier_initializer() {  if(mp_barrier) pthread_barrier_destroy(mp_barrier);  }
 155
 156       void release() {mp_barrier = 0; }
 157
 158     private:
 159       pthread_barrier_t *mp_barrier;
 160    };
 161
 162    #endif   //#if defined(BOOST_INTERPROCESS_POSIX_BARRIERS) && defined(BOOST_INTERPROCESS_POSIX_PROCESS_SHARED)
 163
 164 }//namespace ipcdetail
 165
 166 }//namespace interprocess
 167
 168 }//namespace boost
 169
 170 #include <boost/interprocess/detail/config_end.hpp>
 171
 172 #endif //ifdef BOOST_INTERPROCESS_PTHREAD_HELPERS_HPP