-/*
+/* $Id: isamd-p.h,v 1.5 1999-08-20 12:25:58 heikki Exp $
* Copyright (c) 1995-1996, Index Data.
* See the file LICENSE for details.
* Heikki Levanto
*
- *
+ * log at the end
*/
#include <bfile.h>
typedef struct {
int lastblock;
int freelist;
-} ISAMH_head;
+} ISAMD_head;
-typedef unsigned ISAMH_BLOCK_SIZE;
+typedef unsigned ISAMD_BLOCK_SIZE;
-typedef struct ISAMH_file_s {
- ISAMH_head head;
+typedef struct ISAMD_file_s {
+ ISAMD_head head;
BFile bf;
int head_is_dirty;
- int no_writes;
+ int no_writes; /* statistics, to be used properly... */
int no_reads;
int no_skip_writes;
int no_allocated;
int no_next;
int no_prev;
- char *alloc_buf;
+ int no_op_nodiff; /* existing blocks opened for reading without diffs */
+ int no_op_intdiff; /* - with internal diffs */
+ int no_op_extdiff; /* with separate diff blocks */
+ int no_fbuilds; /* number of first-time builds */
+ int no_appds; /* number of appends */
+ int no_merges; /* number of merges done */
+ int no_remerges; /* number of times more than one merge needed */
+
+ char *alloc_buf; /* free-list handling (?) */
int alloc_entries_num;
int alloc_entries_max;
int fc_max;
int *fc_list;
-} *ISAMH_file;
+} *ISAMD_file;
-struct ISAMH_s {
+struct ISAMD_s {
int no_files;
int max_cat;
- // char *merge_buf;
- char *startblock; /* start of the chain, update lastptr and numKeys here */
- char *lastblock; /* end of the chain, append here */
- ISAMH_M method;
- ISAMH_file files;
+ ISAMD_M method;
+ ISAMD_file files;
};
-struct ISAMH_PP_s {
- char *buf;
- ISAMH_BLOCK_SIZE offset;
- ISAMH_BLOCK_SIZE size;
+
+typedef struct ISAMD_DIFF_s *ISAMD_DIFF;
+
+struct ISAMD_PP_s {
+ char *buf; /* buffer for read/write operations */
+ ISAMD_BLOCK_SIZE offset; /* position for next read/write */
+ ISAMD_BLOCK_SIZE size; /* size of actual pointer data */
int cat; /* category of this block */
int pos; /* block number of this block */
int next; /* number of the next block */
- ISAMH is;
+ int diffs; /* either block or offset (in head) of start of diffs */
+ ISAMD is;
void *decodeClientData;
- int deleteFlag;
+ ISAMD_DIFF diffinfo;
+ char *diffbuf; /* buffer for the diff block, only when reading */
int numKeys;
- ISAMH_BLOCK_SIZE lastblock; /* last block in chain */
};
-#define ISAMH_BLOCK_OFFSET_N (sizeof(int) + \
- sizeof(ISAMH_BLOCK_SIZE))
+#define ISAMD_BLOCK_OFFSET_N (sizeof(int) + \
+ sizeof(ISAMD_BLOCK_SIZE))
/* == 8 */
-#define ISAMH_BLOCK_OFFSET_1 (sizeof(int) + \
- sizeof(ISAMH_BLOCK_SIZE) + \
+#define ISAMD_BLOCK_OFFSET_1 (sizeof(int) + \
+ sizeof(ISAMD_BLOCK_SIZE) + \
sizeof(int) + \
- sizeof(ISAMH_BLOCK_SIZE))
+ sizeof(ISAMD_BLOCK_SIZE))
/* == 16 */
-int isamd_alloc_block (ISAMH is, int cat);
-void isamd_release_block (ISAMH is, int cat, int pos);
-int isamd_read_block (ISAMH is, int cat, int pos, char *dst);
-int isamd_write_block (ISAMH is, int cat, int pos, char *src);
+
+
+int isamd_alloc_block (ISAMD is, int cat);
+void isamd_release_block (ISAMD is, int cat, int pos);
+int isamd_read_block (ISAMD is, int cat, int pos, char *dst);
+int isamd_write_block (ISAMD is, int cat, int pos, char *src);
+void isamd_free_diffs(ISAMD_PP pp);
#ifdef __cplusplus
}
/*
* $Log: isamd-p.h,v $
- * Revision 1.1 1999-07-14 12:34:43 heikki
+ * Revision 1.5 1999-08-20 12:25:58 heikki
+ * Statistics in isamd
+ *
+ * Revision 1.4 1999/07/21 14:24:50 heikki
+ * isamd write and read functions ok, except when diff block full.
+ * (merge not yet done)
+ *
+ * Revision 1.3 1999/07/14 15:05:30 heikki
+ * slow start on isam-d
+ *
+ * Revision 1.1 1999/07/14 12:34:43 heikki
* Copied from isamh, starting to change things...
*
*