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ITS#7775 Cleanup mdb_node_del()

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Howard Chu 2014-01-06 23:21:44 +01:00 committed by Hallvard Furuseth
parent 88342f9661
commit 6fb561d33e
1 changed files with 19 additions and 15 deletions
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32
libraries/liblmdb/mdb.c
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@ -1130,7 +1130,7 @@ static void mdb_env_close0(MDB_env *env, int excl);
static MDB_node *mdb_node_search(MDB_cursor *mc, MDB_val *key, int *exactp);
static int mdb_node_add(MDB_cursor *mc, indx_t indx,
MDB_val *key, MDB_val *data, pgno_t pgno, unsigned int flags);
static void mdb_node_del(MDB_page *mp, indx_t indx, int ksize);
static void mdb_node_del(MDB_cursor *mc, int ksize);
static void mdb_node_shrink(MDB_page *mp, indx_t indx);
static int mdb_node_move(MDB_cursor *csrc, MDB_cursor *cdst);
static int mdb_node_read(MDB_txn *txn, MDB_node *leaf, MDB_val *data);
@ -6032,7 +6032,7 @@ prep_subDB:
flags |= F_DUPDATA;
do_sub = 1;
if (!insert)
mdb_node_del(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top], 0);
mdb_node_del(mc, 0);
goto new_sub;
}
current:
@ -6108,7 +6108,7 @@ current:
memcpy(NODEKEY(leaf), key->mv_data, key->mv_size);
goto done;
}
mdb_node_del(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top], 0);
mdb_node_del(mc, 0);
mc->mc_db->md_entries--;
}
@ -6526,8 +6526,10 @@ full:
* part of a #MDB_DUPFIXED database.
*/
static void
mdb_node_del(MDB_page *mp, indx_t indx, int ksize)
mdb_node_del(MDB_cursor *mc, int ksize)
{
MDB_page *mp = mc->mc_pg[mc->mc_top];
indx_t indx = mc->mc_ki[mc->mc_top];
unsigned int sz;
indx_t i, j, numkeys, ptr;
MDB_node *node;
@ -6535,10 +6537,11 @@ mdb_node_del(MDB_page *mp, indx_t indx, int ksize)
DPRINTF(("delete node %u on %s page %"Z"u", indx,
IS_LEAF(mp) ? "leaf" : "branch", mdb_dbg_pgno(mp)));
assert(indx < NUMKEYS(mp));
numkeys = NUMKEYS(mp);
mdb_cassert(mc, indx < numkeys);
if (IS_LEAF2(mp)) {
int x = NUMKEYS(mp) - 1 - indx;
int x = numkeys - 1 - indx;
base = LEAF2KEY(mp, indx, ksize);
if (x)
memmove(base, base + ksize, x * ksize);
@ -6558,7 +6561,6 @@ mdb_node_del(MDB_page *mp, indx_t indx, int ksize)
sz = EVEN(sz);
ptr = mp->mp_ptrs[indx];
numkeys = NUMKEYS(mp);
for (i = j = 0; i < numkeys; i++) {
if (i != indx) {
mp->mp_ptrs[j] = mp->mp_ptrs[i];
@ -6883,7 +6885,7 @@ mdb_update_key(MDB_cursor *mc, MDB_val *key)
/* not enough space left, do a delete and split */
DPRINTF(("Not enough room, delta = %d, splitting...", delta));
pgno = NODEPGNO(node);
mdb_node_del(mc->mc_pg[mc->mc_top], mc->mc_ki[mc->mc_top], 0);
mdb_node_del(mc, 0);
return mdb_page_split(mc, key, NULL, pgno, MDB_SPLIT_REPLACE);
}
@ -7005,7 +7007,7 @@ mdb_node_move(MDB_cursor *csrc, MDB_cursor *cdst)
/* Delete the node from the source page.
*/
mdb_node_del(csrc->mc_pg[csrc->mc_top], csrc->mc_ki[csrc->mc_top], key.mv_size);
mdb_node_del(csrc, key.mv_size);
{
/* Adjust other cursors pointing to mp */
@ -7163,15 +7165,17 @@ mdb_page_merge(MDB_cursor *csrc, MDB_cursor *cdst)
/* Unlink the src page from parent and add to free list.
*/
mdb_node_del(csrc->mc_pg[csrc->mc_top-1], csrc->mc_ki[csrc->mc_top-1], 0);
if (csrc->mc_ki[csrc->mc_top-1] == 0) {
key.mv_size = 0;
csrc->mc_top--;
mdb_node_del(csrc, 0);
if (csrc->mc_ki[csrc->mc_top] == 0) {
key.mv_size = 0;
rc = mdb_update_key(csrc, &key);
if (rc) {
csrc->mc_top++;
if (rc)
return rc;
}
}
csrc->mc_top++;
rc = mdb_midl_append(&csrc->mc_txn->mt_free_pgs,
csrc->mc_pg[csrc->mc_top]->mp_pgno);
@ -7414,7 +7418,7 @@ mdb_cursor_del0(MDB_cursor *mc, MDB_node *leaf)
(rc = mdb_ovpage_free(mc, omp)))
return rc;
}
mdb_node_del(mp, ki, mc->mc_db->md_pad);
mdb_node_del(mc, mc->mc_db->md_pad);
mc->mc_db->md_entries--;
rc = mdb_rebalance(mc);
if (rc != MDB_SUCCESS)