Home Research Papers Posters Manuals Talks Download People Help Internal

util/pup_paged.h

Go to the documentation of this file.

#ifndef _PUP_PAGED_H_
#define _PUP_PAGED_H_
#define PUP_BLOCK 512
#include <stdio.h>
#include <string.h>
#include "pup.h"
typedef struct _list{
    int n;
    struct _list *next;
} pup_list;
// each pageentry is indexed by the pointer of the object
typedef struct _pageentry{
    void *ptr;
    pup_list *blklist;
    struct _pageentry *next;
} pup_pageentry;    

typedef struct {
    pup_list *freelist;
    pup_list *tailfreelist; //tail of freelist
    pup_pageentry *table; 
    pup_pageentry *tailtable; // tail of pagetable entries
    int maxblk; // the number of blocks that have been written out by now
    FILE *fp;
    char *fName;
} pup_pagetable;


pup_pagetable *getNewPagetable(char *fName);

class PUP_pagedDisk : public PUP::er {
    protected:
    pup_pagetable *_pagetable;
    void  *handle; // handle of the object to be restored
    PUP_pagedDisk(unsigned int type,void *objhandle,pup_pagetable *pgtable):PUP::er(type),_pagetable(pgtable),handle(objhandle){
    }

};

class PUP_toPagedDisk : public PUP_pagedDisk{
  protected:
  virtual void bytes(void *p,size_t n,size_t itemSize,PUP::dataType t);
    pup_pageentry *entry;
    long current_block;
    long bytes_left;
    FILE *fp;
    pup_list *tailblklist;
    public:
    PUP_toPagedDisk(void *objhandle,pup_pagetable *pgtable):PUP_pagedDisk(IS_PACKING,objhandle,pgtable){
        addpageentry();
        nextblock();
        fp = _pagetable->fp;
    }
    
    void addpageentry();
    void nextblock();

    
};

class PUP_fromPagedDisk : public PUP_pagedDisk{
    protected:
    virtual void bytes(void *p,size_t n,size_t itemSize,PUP::dataType );
    pup_pageentry *entry;
    long current_block;
    long bytes_unread;
    FILE *fp;
    public:
    PUP_fromPagedDisk(void *objhandle,pup_pagetable *pgtable):PUP_pagedDisk(IS_UNPACKING,objhandle,pgtable){
        findpageentry();
        current_block = -1;
        nextblock();
        fp = _pagetable->fp;
    }
    
    ~PUP_fromPagedDisk(){
        nextblock();
        delete entry;
    }
    void findpageentry();
    void nextblock();
};

#endif

---