sprint/ipc/memory.h

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/******************************************************************************
*   sprint::ipc
*
*   Copyright (C) 2005-2011  Paolo Medici <www.pmx.it>
*
*  This library is free software; you can redistribute it and/or
*  modify it under the terms of the GNU Lesser General Public
*  License as published by the Free Software Foundation; either
*  version 2.1 of the License, or (at your option) any later version.
*
*  This library 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
*  Lesser General Public License for more details.
*
*  You should have received a copy of the GNU Lesser General Public
*  License along with this library; if not, write to the Free Software
*  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*
*******************************************************************************/

#ifndef _SPRINT_IPC_MEMORY_H
#define _SPRINT_IPC_MEMORY_H  

#include <string>

namespace sprint {
  namespace ipc {

        enum memory_policy {
                none = 0,
                push = 1,
                pop =  2,
                delta = 4
        };

        struct segment_info {
                std::string name;
                int ref_count;
                int size;
                memory_policy policy;
        };

        class segment {
        public:
                virtual ~segment() {};
                virtual bool info(segment_info & info) = 0;
                virtual void *lock(int begin, int lenght, lock_policy policy) = 0;
                virtual bool unlock() = 0;
        };

        segment *create_memory(const char *name, unsigned int size, memory_policy update_policy=none);
        
        segment *open_memory(const char *name);

                    
            }        
          }

#endif