cfile.h

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/* This file is part of the Zebra server.
   Copyright (C) Index Data
 
Zebra 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, or (at your option) any later
version.
 
Zebra 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
*/
 
 
 
#ifndef CFILE_H
#define CFILE_H
 
#include <yaz/yconfig.h>
 
YAZ_BEGIN_CDECL
 
#define HASH_BUCKET 15
 
struct CFile_ph_bucket {
    zint no[HASH_BUCKET]; 
    zint vno[HASH_BUCKET];
    zint this_bucket;     
    zint next_bucket;     
};
 
struct CFile_hash_bucket {
    struct CFile_ph_bucket ph;
    int dirty;
    struct CFile_hash_bucket *h_next, **h_prev;
    struct CFile_hash_bucket *lru_next, *lru_prev;
};
 
#define HASH_BSIZE sizeof(struct CFile_ph_bucket)
 
#define CFILE_STATE_HASH 1
 
#define CFILE_STATE_FLAT 2
 
struct CFile_head {
    int state;         
    zint next_block;   
    int block_size;    
    int hash_size;     
    zint first_bucket; 
    zint next_bucket;  
    zint flat_bucket;  
};
 
typedef struct CFile_struct
{
    struct CFile_head head;
 
    MFile block_mf;  
    MFile hash_mf;   
    zint *array;     
    struct CFile_hash_bucket **parray; 
    struct CFile_hash_bucket *bucket_lru_front; 
    struct CFile_hash_bucket *bucket_lru_back;  
    int dirty;   
    zint bucket_in_memory;  
    zint max_bucket_in_memory; 
    char *iobuf;  
    MFile rmf;   
    int  no_hits;  
    int  no_miss;  
    Zebra_mutex mutex;
} *CFile;
 
int cf_close (CFile cf);
 
CFile cf_open (MFile mf, MFile_area area, const char *fname, int block_size,
               int wflag, int *firstp);
int cf_read (CFile cf, zint no, int offset, int nbytes, void *buf);
int cf_write (CFile cf, zint no, int offset, int nbytes, const void *buf);
int cf_commit (CFile cf) ZEBRA_GCC_ATTR((warn_unused_result));
 
YAZ_END_CDECL
 
#endif
/*
 * Local variables:
 * c-basic-offset: 4
 * c-file-style: "Stroustrup"
 * indent-tabs-mode: nil
 * End:
 * vim: shiftwidth=4 tabstop=8 expandtab
 */