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 //////////////////////////////////////////////////////////////////////////////
 //
 // (C) Copyright Ion Gaztanaga 2005-2012. Distributed under the Boost
 // Software License, Version 1.0. (See accompanying file
 // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 //
 // See http://www.boost.org/libs/interprocess for documentation.
 //
 //////////////////////////////////////////////////////////////////////////////
 
 #ifndef BOOST_INTERPROCESS_PTHREAD_HELPERS_HPP
 #define BOOST_INTERPROCESS_PTHREAD_HELPERS_HPP
 
 #ifndef BOOST_CONFIG_HPP
 #  include <boost/config.hpp>
 #endif
 #
 #if defined(BOOST_HAS_PRAGMA_ONCE)
 #  pragma once
 #endif
 
 #include <boost/interprocess/detail/config_begin.hpp>
 #include <boost/interprocess/detail/workaround.hpp>
 
 #include <pthread.h>
 #include <errno.h>
 #include <boost/interprocess/exceptions.hpp>
 
 namespace boost {
 namespace interprocess {
 namespace ipcdetail{
 
    #if defined BOOST_INTERPROCESS_POSIX_PROCESS_SHARED
 
    //!Makes pthread_mutexattr_t cleanup easy when using exceptions
    struct mutexattr_wrapper
    {
       //!Constructor
       mutexattr_wrapper(bool recursive = false)
       {
          if(pthread_mutexattr_init(&m_attr)!=0 ||
             pthread_mutexattr_setpshared(&m_attr, PTHREAD_PROCESS_SHARED)!= 0 ||
              (recursive &&
               pthread_mutexattr_settype(&m_attr, PTHREAD_MUTEX_RECURSIVE) != 0 )
               #ifdef BOOST_INTERPROCESS_POSIX_ROBUST_MUTEXES
               || pthread_mutexattr_setrobust(&m_attr, PTHREAD_MUTEX_ROBUST) != 0
               #endif
               )
           throw interprocess_exception("pthread_mutexattr_xxxx failed");
       }
 
       //!Destructor
      ~mutexattr_wrapper()  {  pthread_mutexattr_destroy(&m_attr);  }
 
       //!This allows using mutexattr_wrapper as pthread_mutexattr_t
       operator pthread_mutexattr_t&()  {  return m_attr;  }
 
       pthread_mutexattr_t m_attr;
    };
 
    //!Makes pthread_condattr_t cleanup easy when using exceptions
    struct condattr_wrapper
    {
       //!Constructor
       condattr_wrapper()
       {
          if(pthread_condattr_init(&m_attr)!=0 ||
             pthread_condattr_setpshared(&m_attr, PTHREAD_PROCESS_SHARED)!= 0)
             throw interprocess_exception("pthread_condattr_xxxx failed");
       }
 
       //!Destructor
      ~condattr_wrapper() { pthread_condattr_destroy(&m_attr); }
 
       //!This allows using condattr_wrapper as pthread_condattr_t
       operator pthread_condattr_t&(){  return m_attr;  }
 
       pthread_condattr_t m_attr;
    };
 
    //!Makes initialized pthread_mutex_t cleanup easy when using exceptions
    class mutex_initializer
    {
     public:
       //!Constructor. Takes interprocess_mutex attributes to initialize the interprocess_mutex
       mutex_initializer(pthread_mutex_t &mut, pthread_mutexattr_t &mut_attr)
       : mp_mut(&mut)
       {
          if(pthread_mutex_init(mp_mut, &mut_attr) != 0)
             throw interprocess_exception("pthread_mutex_init failed");
       }
 
      ~mutex_initializer() {  if(mp_mut) pthread_mutex_destroy(mp_mut);  }
 
       void release() {mp_mut = 0; }
 
     private:
       pthread_mutex_t *mp_mut;
    };
 
    //!Makes initialized pthread_cond_t cleanup easy when using exceptions
    class condition_initializer
    {
     public:
       condition_initializer(pthread_cond_t &cond, pthread_condattr_t &cond_attr)
       : mp_cond(&cond)
       {
          if(pthread_cond_init(mp_cond, &cond_attr)!= 0)
             throw interprocess_exception("pthread_cond_init failed");
       }
 
      ~condition_initializer()   {  if(mp_cond) pthread_cond_destroy(mp_cond);  }
 
       void release()       { mp_cond = 0; }
 
     private:
       pthread_cond_t *mp_cond;
    };
 
    #endif   //   #if defined BOOST_INTERPROCESS_POSIX_PROCESS_SHARED
 
    #if defined(BOOST_INTERPROCESS_POSIX_BARRIERS) && defined(BOOST_INTERPROCESS_POSIX_PROCESS_SHARED)
 
    //!Makes pthread_barrierattr_t cleanup easy when using exceptions
    struct barrierattr_wrapper
    {
       //!Constructor
       barrierattr_wrapper()
       {
          if(pthread_barrierattr_init(&m_attr)!=0 ||
             pthread_barrierattr_setpshared(&m_attr, PTHREAD_PROCESS_SHARED)!= 0)
             throw interprocess_exception("pthread_barrierattr_xxx failed");
       }
 
       //!Destructor
      ~barrierattr_wrapper()  {  pthread_barrierattr_destroy(&m_attr);  }
 
       //!This allows using mutexattr_wrapper as pthread_barrierattr_t
       operator pthread_barrierattr_t&()  {  return m_attr;  }
 
       pthread_barrierattr_t m_attr;
    };
 
    //!Makes initialized pthread_barrier_t cleanup easy when using exceptions
    class barrier_initializer
    {
     public:
       //!Constructor. Takes barrier attributes to initialize the barrier
       barrier_initializer(pthread_barrier_t &mut,
                           pthread_barrierattr_t &mut_attr,
                           unsigned int count)
       : mp_barrier(&mut)
       {
          if(pthread_barrier_init(mp_barrier, &mut_attr, count) != 0)
             throw interprocess_exception("pthread_barrier_init failed");
       }
 
      ~barrier_initializer() {  if(mp_barrier) pthread_barrier_destroy(mp_barrier);  }
 
       void release() {mp_barrier = 0; }
 
     private:
       pthread_barrier_t *mp_barrier;
    };
 
    #endif   //#if defined(BOOST_INTERPROCESS_POSIX_BARRIERS) && defined(BOOST_INTERPROCESS_POSIX_PROCESS_SHARED)
 
 }//namespace ipcdetail
 
 }//namespace interprocess
 
 }//namespace boost
 
 #include <boost/interprocess/detail/config_end.hpp>
 
 #endif //ifdef BOOST_INTERPROCESS_PTHREAD_HELPERS_HPP

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