Boost C++ Libraries

boost/interprocess/sync/windows/condition.hpp

//////////////////////////////////////////////////////////////////////////////
//
// (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_DETAIL_WINDOWS_CONDITION_HPP
#define BOOST_INTERPROCESS_DETAIL_WINDOWS_CONDITION_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 <boost/interprocess/sync/cv_status.hpp>
#include <boost/interprocess/sync/interprocess_mutex.hpp>
#include <boost/interprocess/sync/scoped_lock.hpp>
#include <boost/interprocess/exceptions.hpp>
#include <boost/interprocess/sync/windows/semaphore.hpp>
#include <boost/interprocess/sync/windows/mutex.hpp>
#include <boost/interprocess/sync/detail/condition_algorithm_8a.hpp>


namespace boost {
namespace interprocess {
namespace ipcdetail {

class winapi_condition
{
   winapi_condition(const winapi_condition &);
   winapi_condition &operator=(const winapi_condition &);

   public:
   winapi_condition()
      : m_condition_data()
   {}

   ~winapi_condition()
   {
      //Notify all waiting threads
      //to allow POSIX semantics on condition destruction
      this->notify_all();
   }

   void notify_one()
   {  m_condition_data.notify_one();   }

   void notify_all()
   {  m_condition_data.notify_all();   }

   template <typename L>
   void wait(L& lock)
   {  m_condition_data.wait(lock);   }

   template <typename L, typename Pr>
   void wait(L& lock, Pr pred)
   {  m_condition_data.wait(lock, pred);   }


   template <typename L, typename TimePoint>
   bool timed_wait(L& lock, const TimePoint &abs_time)
   {  return m_condition_data.timed_wait(lock, abs_time);   }

   template <typename L, typename TimePoint, typename Pr>
   bool timed_wait(L& lock, const TimePoint &abs_time, Pr pred)
   {  return m_condition_data.timed_wait(lock, abs_time, pred);   }

   template <typename L, class TimePoint>
   cv_status wait_until(L& lock, const TimePoint &abs_time)
   {  return this->timed_wait(lock, abs_time) ? cv_status::no_timeout : cv_status::timeout; }

   template <typename L, class TimePoint, typename Pr>
   bool wait_until(L& lock, const TimePoint &abs_time, Pr pred)
   {  return this->timed_wait(lock, abs_time, pred); }

   template <typename L, class Duration>
   cv_status wait_for(L& lock, const Duration &dur)
   {  return this->wait_until(lock, duration_to_ustime(dur)); }

   template <typename L, class Duration, typename Pr>
   bool wait_for(L& lock, const Duration &dur, Pr pred)
   {  return this->wait_until(lock, duration_to_ustime(dur), pred); }

   private:

   struct condition_data
   {
      typedef unsigned int      integer_type;
      typedef winapi_semaphore  semaphore_type;
      typedef winapi_mutex      mutex_type;

      condition_data()
         : m_nwaiters_blocked(0)
         , m_nwaiters_gone(0)
         , m_nwaiters_to_unblock(0)
         , m_sem_block_queue(0)
         , m_sem_block_lock(1)
         , m_mtx_unblock_lock()
      {}

      integer_type    &get_nwaiters_blocked()
      {  return m_nwaiters_blocked;  }

      integer_type    &get_nwaiters_gone()
      {  return m_nwaiters_gone;  }

      integer_type    &get_nwaiters_to_unblock()
      {  return m_nwaiters_to_unblock;  }

      semaphore_type  &get_sem_block_queue()
      {  return m_sem_block_queue;  }

      semaphore_type  &get_sem_block_lock()
      {  return m_sem_block_lock;  }

      mutex_type      &get_mtx_unblock_lock()
      {  return m_mtx_unblock_lock;  }

      integer_type            m_nwaiters_blocked;
      integer_type            m_nwaiters_gone;
      integer_type            m_nwaiters_to_unblock;
      semaphore_type          m_sem_block_queue;
      semaphore_type          m_sem_block_lock;
      mutex_type              m_mtx_unblock_lock;
   };

   ipcdetail::condition_8a_wrapper<condition_data> m_condition_data;
};

}  //namespace ipcdetail
}  //namespace interprocess
}  //namespace boost

#include <boost/interprocess/detail/config_end.hpp>

#endif   //BOOST_INTERPROCESS_DETAIL_WINDOWS_CONDITION_HPP