//////////////////////////////////////////////////////////////////////////////

//

// (C) Copyright Ion Gaztanaga 2005-2008. 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.

//

//////////////////////////////////////////////////////////////////////////////



#include<boost/interprocess/exceptions.hpp>

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

#include <boost/interprocess/sync/scoped_lock.hpp>



namespace boost {

namespace interprocess {



inline interprocess_semaphore::~interprocess_semaphore()

{}



inline interprocess_semaphore::interprocess_semaphore(int initialCount)

   :  m_mut(), m_cond(), m_count(initialCount)

{}



inline void interprocess_semaphore::post()

{

   scoped_lock<interprocess_mutex> lock(m_mut);

   if(m_count == 0){

      m_cond.notify_one();

   }

   ++m_count;

}



inline void interprocess_semaphore::wait()

{

   scoped_lock<interprocess_mutex> lock(m_mut);

   while(m_count == 0){

      m_cond.wait(lock);

   }

   --m_count;

}



inline bool interprocess_semaphore::try_wait()

{

   scoped_lock<interprocess_mutex> lock(m_mut);

   if(m_count == 0){

      return false;

   }

   --m_count;

   return true;

}



inline bool interprocess_semaphore::timed_wait(const boost::posix_time::ptime &abs_time)

{

   scoped_lock<interprocess_mutex> lock(m_mut);

   while(m_count == 0){

      if(!m_cond.timed_wait(lock, abs_time))

         return m_count != 0;

   }

   --m_count;

   return true;

}

/*

inline int interprocess_semaphore::get_count() const

{

   scoped_lock<interprocess_mutex> lock(m_mut);

   return count;   

}*/



}  //namespace interprocess {

}  //namespace boost {

