deferred_cleanup.h

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/*
  This file is part of MADNESS.

  Copyright (C) 2007,2010 Oak Ridge National Laboratory

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

  For more information please contact:

  Robert J. Harrison
  Oak Ridge National Laboratory
  One Bethel Valley Road
  P.O. Box 2008, MS-6367

  email: harrisonrj@ornl.gov
  tel:   865-241-3937
  fax:   865-572-0680


  $Id$
*/

#ifndef MADNESS_WORLD_DEFERRED_CLEANUP_H__INCLUDED
#define MADNESS_WORLD_DEFERRED_CLEANUP_H__INCLUDED

#include <madness/world/shared_ptr.h>
#include <madness/world/worldmutex.h>  // For Mutex
#include <list>

namespace madness {

    // Forward declarations
    template <typename, typename>
    class DeferredDeleter;
    class World;

    namespace detail {


        class DeferredCleanup {
        public:
            typedef std::shared_ptr<void> void_ptr; 

        private:
            typedef std::list<void_ptr> void_ptr_list;

            RecursiveMutex mutex_;      
            void_ptr_list deferred_;    
            bool destroy_;              

            // not allowed
            DeferredCleanup(const DeferredCleanup&);
            DeferredCleanup& operator=(const DeferredCleanup&);

            template <typename, typename>
            friend class ::madness::DeferredDeleter;


            static std::shared_ptr<DeferredCleanup> get_deferred_cleanup(const World& w);

        public:
            DeferredCleanup() : mutex_(), deferred_(), destroy_(false) { }


            void destroy(bool mode);


            bool destroy() const;


            void add(const void_ptr& obj);

            void do_cleanup();
        }; // class DeferredCleanup

    }  // namespace detail
}  // namespace madness

#endif // MADNESS_WORLD_DEFERRED_CLEANUP_H__INCLUDED