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Move code out of mdb_cursor_del0() and mdb_del().

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Prepares for the next commits.
This commit is contained in:
Hallvard Furuseth 2014-03-16 12:42:42 +01:00
parent 012d7b5de7
commit 86f8b203f5
1 changed files with 37 additions and 29 deletions
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66
libraries/liblmdb/mdb.c
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@ -1145,7 +1145,8 @@ static int mdb_update_key(MDB_cursor *mc, MDB_val *key);
static void mdb_cursor_pop(MDB_cursor *mc);
static int mdb_cursor_push(MDB_cursor *mc, MDB_page *mp);
static int mdb_cursor_del0(MDB_cursor *mc, MDB_node *leaf);
static int mdb_cursor_del0(MDB_cursor *mc);
static int mdb_del0(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data, unsigned flags);
static int mdb_cursor_sibling(MDB_cursor *mc, int move_right);
static int mdb_cursor_next(MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op);
static int mdb_cursor_prev(MDB_cursor *mc, MDB_val *key, MDB_val *data, MDB_cursor_op op);
@ -6349,7 +6350,18 @@ mdb_cursor_del(MDB_cursor *mc, unsigned int flags)
}
}
return mdb_cursor_del0(mc, leaf);
/* add overflow pages to free list */
if (!IS_LEAF2(mp) && F_ISSET(leaf->mn_flags, F_BIGDATA)) {
MDB_page *omp;
pgno_t pg;
memcpy(&pg, NODEDATA(leaf), sizeof(pg));
if ((rc = mdb_page_get(mc->mc_txn, pg, &omp, NULL)) ||
(rc = mdb_ovpage_free(mc, omp)))
return rc;
}
return mdb_cursor_del0(mc);
}
/** Allocate and initialize new pages for a database.
@ -7459,26 +7471,14 @@ mdb_rebalance(MDB_cursor *mc)
/** Complete a delete operation started by #mdb_cursor_del(). */
static int
mdb_cursor_del0(MDB_cursor *mc, MDB_node *leaf)
mdb_cursor_del0(MDB_cursor *mc)
{
int rc;
MDB_page *mp;
indx_t ki;
unsigned int nkeys;
mp = mc->mc_pg[mc->mc_top];
ki = mc->mc_ki[mc->mc_top];
/* add overflow pages to free list */
if (!IS_LEAF2(mp) && F_ISSET(leaf->mn_flags, F_BIGDATA)) {
MDB_page *omp;
pgno_t pg;
memcpy(&pg, NODEDATA(leaf), sizeof(pg));
if ((rc = mdb_page_get(mc->mc_txn, pg, &omp, NULL)) ||
(rc = mdb_ovpage_free(mc, omp)))
return rc;
}
mdb_node_del(mc, mc->mc_db->md_pad);
mc->mc_db->md_entries--;
rc = mdb_rebalance(mc);
@ -7522,28 +7522,35 @@ int
mdb_del(MDB_txn *txn, MDB_dbi dbi,
MDB_val *key, MDB_val *data)
{
MDB_cursor mc;
MDB_xcursor mx;
MDB_cursor_op op;
MDB_val rdata, *xdata;
int rc, exact;
DKBUF;
DPRINTF(("====> delete db %u key [%s]", dbi, DKEY(key)));
if (!key || dbi == FREE_DBI || !TXN_DBI_EXIST(txn, dbi))
return EINVAL;
if (txn->mt_flags & (MDB_TXN_RDONLY|MDB_TXN_ERROR))
return (txn->mt_flags & MDB_TXN_RDONLY) ? EACCES : MDB_BAD_TXN;
mdb_cursor_init(&mc, txn, dbi, &mx);
exact = 0;
if (!F_ISSET(txn->mt_dbs[dbi].md_flags, MDB_DUPSORT)) {
/* must ignore any data */
data = NULL;
}
return mdb_del0(txn, dbi, key, data, 0);
}
static int
mdb_del0(MDB_txn *txn, MDB_dbi dbi,
MDB_val *key, MDB_val *data, unsigned flags)
{
MDB_cursor mc;
MDB_xcursor mx;
MDB_cursor_op op;
MDB_val rdata, *xdata;
int rc, exact = 0;
DKBUF;
DPRINTF(("====> delete db %u key [%s]", dbi, DKEY(key)));
mdb_cursor_init(&mc, txn, dbi, &mx);
if (data) {
op = MDB_GET_BOTH;
rdata = *data;
@ -7551,6 +7558,7 @@ mdb_del(MDB_txn *txn, MDB_dbi dbi,
} else {
op = MDB_SET;
xdata = NULL;
flags |= MDB_NODUPDATA;
}
rc = mdb_cursor_set(&mc, key, xdata, op, &exact);
if (rc == 0) {
@ -7565,7 +7573,7 @@ mdb_del(MDB_txn *txn, MDB_dbi dbi,
mc.mc_flags |= C_UNTRACK;
mc.mc_next = txn->mt_cursors[dbi];
txn->mt_cursors[dbi] = &mc;
rc = mdb_cursor_del(&mc, data ? 0 : MDB_NODUPDATA);
rc = mdb_cursor_del(&mc, flags);
txn->mt_cursors[dbi] = mc.mc_next;
}
return rc;
@ -8377,7 +8385,7 @@ int mdb_drop(MDB_txn *txn, MDB_dbi dbi, int del)
/* Can't delete the main DB */
if (del && dbi > MAIN_DBI) {
rc = mdb_del(txn, MAIN_DBI, &mc->mc_dbx->md_name, NULL);
rc = mdb_del0(txn, MAIN_DBI, &mc->mc_dbx->md_name, NULL, 0);
if (!rc) {
txn->mt_dbflags[dbi] = DB_STALE;
mdb_dbi_close(txn->mt_env, dbi);