/*
- * Copyright (C) 1995, Index Data I/S
+ * Copyright (C) 1995-1998, Index Data
* All rights reserved.
* Sebastian Hammer, Adam Dickmeiss
*
* $Log: cfile.h,v $
- * Revision 1.1 1995-11-30 08:33:12 adam
+ * Revision 1.10 1998-10-15 13:09:31 adam
+ * Minor changes.
+ *
+ * Revision 1.9 1998/08/07 15:07:15 adam
+ * Fixed but in cf_commit_flat.
+ *
+ * Revision 1.8 1996/04/18 16:02:56 adam
+ * Changed logging a bit.
+ * Removed warning message when commiting flat shadow files.
+ *
+ * Revision 1.7 1996/02/07 14:03:48 adam
+ * Work on flat indexed shadow files.
+ *
+ * Revision 1.6 1996/02/07 10:08:45 adam
+ * Work on flat shadow (not finished yet).
+ *
+ * Revision 1.5 1995/12/15 12:36:52 adam
+ * Moved hash file information to union.
+ * Renamed commit files.
+ *
+ * Revision 1.4 1995/12/11 09:03:54 adam
+ * New function: cf_unlink.
+ * New member of commit file head: state (0) deleted, (1) hash file.
+ *
+ * Revision 1.3 1995/12/01 16:24:29 adam
+ * Commit files use separate meta file area.
+ *
+ * Revision 1.2 1995/12/01 11:37:23 adam
+ * Cached/commit files implemented as meta-files.
+ *
+ * Revision 1.1 1995/11/30 08:33:12 adam
* Started work on commit facility.
*
*/
#ifndef CFILE_H
#define CFILE_H
-#define HASH_BUCKET 63
+#define HASH_BUCKET 15
+
+struct CFile_ph_bucket { /* structure on disc */
+ int no[HASH_BUCKET]; /* block number in original file */
+ int vno[HASH_BUCKET]; /* block number in shadow file */
+ int this_bucket; /* this bucket number */
+ int next_bucket; /* next bucket number */
+};
struct CFile_hash_bucket {
- struct CFile_ph_bucket {
- int no[HASH_BUCKET];
- int vno[HASH_BUCKET];
- int this_bucket;
- int next_bucket;
- } ph;
+ 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_FLAT 1
+
typedef struct CFile_struct
{
struct CFile_head {
- int hash_size;
- int next_bucket;
- int next_block;
- int block_size;
+ int state; /* 1 = hash, 2 = flat */
+ int next_block; /* next free block / last block */
+ int block_size; /* mfile/bfile block size */
+ int hash_size; /* no of chains in hash table */
+ int first_bucket; /* first hash bucket */
+ int next_bucket; /* last hash bucket + 1 = first flat bucket */
+ int flat_bucket; /* last flat bucket + 1 */
} head;
- int block_fd;
- int hash_fd;
+ MFile block_mf;
+ MFile hash_mf;
int *array;
struct CFile_hash_bucket **parray;
struct CFile_hash_bucket *bucket_lru_front, *bucket_lru_back;
int bucket_in_memory;
int max_bucket_in_memory;
char *iobuf;
- MFile mf;
+ MFile rmf;
+ int no_hits;
+ int no_miss;
} *CFile;
int cf_close (CFile cf);
-CFile cf_open (MFile mf, const char *cname, const char *fname,
- int block_size, int wflag, int *firstp);
+CFile cf_open (MFile mf, MFile_area area, const char *fname, int block_size,
+ int wflag, int *firstp);
int cf_read (CFile cf, int no, int offset, int num, void *buf);
int cf_write (CFile cf, int no, int offset, int num, const void *buf);
+void cf_unlink (CFile cf);
void cf_commit (CFile cf);
#endif