*/
int tdb_transaction_lock(struct tdb_context *tdb, int ltype)
{
- if (tdb->have_transaction_lock || tdb->global_lock.count) {
+ if (tdb->global_lock.count) {
+ return 0;
+ }
+ if (tdb->transaction_lock_count > 0) {
+ tdb->transaction_lock_count++;
return 0;
}
+
if (tdb->methods->tdb_brlock(tdb, TRANSACTION_LOCK, ltype,
F_SETLKW, 0, 1) == -1) {
TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_transaction_lock: failed to get transaction lock\n"));
tdb->ecode = TDB_ERR_LOCK;
return -1;
}
- tdb->have_transaction_lock = 1;
+ tdb->transaction_lock_count++;
return 0;
}
int tdb_transaction_unlock(struct tdb_context *tdb)
{
int ret;
- if (!tdb->have_transaction_lock) {
+ if (tdb->global_lock.count) {
+ return 0;
+ }
+ if (tdb->transaction_lock_count > 0) {
+ tdb->transaction_lock_count--;
return 0;
}
ret = tdb->methods->tdb_brlock(tdb, TRANSACTION_LOCK, F_UNLCK, F_SETLKW, 0, 1);
if (ret == 0) {
- tdb->have_transaction_lock = 0;
+ tdb->transaction_lock_count = 0;
}
return ret;
}
{
struct tdb_traverse_lock tl = { NULL, 0, 0, F_RDLCK };
int ret;
- bool in_transaction = (tdb->transaction != NULL);
/* we need to get a read lock on the transaction lock here to
cope with the lock ordering semantics of solaris10 */
- if (!in_transaction) {
- if (tdb_transaction_lock(tdb, F_RDLCK)) {
- return -1;
- }
+ if (tdb_transaction_lock(tdb, F_RDLCK)) {
+ return -1;
}
tdb->traverse_read++;
ret = tdb_traverse_internal(tdb, fn, private_data, &tl);
tdb->traverse_read--;
- if (!in_transaction) {
- tdb_transaction_unlock(tdb);
- }
+ tdb_transaction_unlock(tdb);
return ret;
}
{
struct tdb_traverse_lock tl = { NULL, 0, 0, F_WRLCK };
int ret;
- bool in_transaction = (tdb->transaction != NULL);
if (tdb->read_only || tdb->traverse_read) {
return tdb_traverse_read(tdb, fn, private_data);
}
- if (!in_transaction) {
- if (tdb_transaction_lock(tdb, F_WRLCK)) {
- return -1;
- }
+ if (tdb_transaction_lock(tdb, F_WRLCK)) {
+ return -1;
}
tdb->traverse_write++;
ret = tdb_traverse_internal(tdb, fn, private_data, &tl);
tdb->traverse_write--;
- if (!in_transaction) {
- tdb_transaction_unlock(tdb);
- }
+ tdb_transaction_unlock(tdb);
return ret;
}