managedMemoryChunk.h

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/*   rambrain - a dynamical physical memory extender
 *   Copyright (C) 2015 M. Imgrund, A. Arth
 *   mimgrund (at) mpifr-bonn.mpg.de
 *   arth (at) usm.uni-muenchen.de
 *
 *   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 3 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, see <http://www.gnu.org/licenses/>.
 */

#ifndef MANAGEDMEMORYCHUNK_H
#define MANAGEDMEMORYCHUNK_H

#include "common.h"

namespace rambrain
{

enum memoryStatus {MEM_ROOT = 0,
                   MEM_ALLOCATED_INUSE_READ = 4 + 1,
                   MEM_ALLOCATED_INUSE_WRITE = 4 + 2 + 1,
                   MEM_ALLOCATED_INUSE = 1, //flaggy
                   MEM_ALLOCATED = 4, //flaggy
                   MEM_SWAPPED = 8, //flaggy
                   MEM_SWAPIN = 16,
                   MEM_SWAPOUT = 32
                  };

typedef uint64_t memoryID;
typedef uint64_t memoryAtime;

class managedMemoryChunk
{
public:
#ifdef PARENTAL_CONTROL
    managedMemoryChunk ( const memoryID &parent, const memoryID &me );
#else
    managedMemoryChunk ( const memoryID &me );
#endif

    //Local management
    memoryStatus status ;
    unsigned short useCnt ;
    void *locPtr ;
    global_bytesize size ;

    //Organization
    memoryID id ;
#ifdef PARENTAL_CONTROL
    memoryID parent ;
    memoryID next;
    memoryID child ;
#endif
    bool preemptiveLoaded = false;

    //Swap scheduling:
    void *schedBuf ;

    //Swap raw management:
    void *swapBuf;
};

}

#endif