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Add rudimentary MDB_MULTIPLE support for puts

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Only for DUPFIXED DBs. Still could do better.
This commit is contained in:
Howard Chu 2011-10-03 11:25:31 -07:00
parent fa3c2945f5
commit 85bfb3c1d1
2 changed files with 14 additions and 0 deletions
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12
libraries/libmdb/mdb.c
View File

@ -3875,6 +3875,7 @@ mdb_cursor_put(MDB_cursor *mc, MDB_val *key, MDB_val *data,
MDB_page *fp;
MDB_db dummy;
int do_sub = 0;
unsigned int mcount = 0;
size_t nsize;
int rc, rc2;
char pbuf[PAGESIZE];
@ -3950,6 +3951,7 @@ top:
/* DB has dups? */
if (F_ISSET(mc->mc_db->md_flags, MDB_DUPSORT)) {
/* Was a single item before, must convert now */
more:
if (!F_ISSET(leaf->mn_flags, F_DUPDATA)) {
/* Just overwrite the current item */
if (flags == MDB_CURRENT)
@ -4158,6 +4160,14 @@ put_sub:
*/
if (!rc && !(flags & MDB_CURRENT))
mc->mc_db->md_entries++;
if (flags & MDB_MULTIPLE) {
mcount++;
if (mcount < data[1].mv_size) {
data[0].mv_data = (char *)data[0].mv_data + data[0].mv_size;
leaf = NODEPTR(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top]);
goto more;
}
}
}
done:
return rc;
@ -5308,6 +5318,8 @@ mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata, pgno_t newpgno
if (nflags & MDB_APPEND) {
mn.mc_ki[mn.mc_top] = 0;
sepkey = *newkey;
nkeys = 0;
split_indx = 0;
goto newsep;
}

2
libraries/libmdb/mdb.h
View File

@ -195,6 +195,8 @@ typedef void (MDB_rel_func)(MDB_val *item, void *oldptr, void *newptr, void *rel
#define MDB_RESERVE 0x10000
/** Data is being appended, don't split full pages. */
#define MDB_APPEND 0x20000
/** Store multiple data items in one call. */
#define MDB_MULTIPLE 0x40000
/* @} */
/** @brief Cursor Get operations.