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dbwrap: Add dbwrap_do_locked

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With a proper implementation this enables modifications without
having to allocate a record. In really performance sensitive code
paths this matters.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
This commit is contained in:
Volker Lendecke 2016-11-09 08:45:59 +01:00 committed by Ralph Boehme
parent 45f5a55ae6
commit cb2a28eb9a
3 changed files with 45 additions and 0 deletions
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36
lib/dbwrap/dbwrap.c
View File

@ -498,6 +498,42 @@ NTSTATUS dbwrap_parse_record_recv(struct tevent_req *req)
return tevent_req_simple_recv_ntstatus(req);
}
NTSTATUS dbwrap_do_locked(struct db_context *db, TDB_DATA key,
void (*fn)(struct db_record *rec,
void *private_data),
void *private_data)
{
struct db_record *rec;
if (db->do_locked != NULL) {
struct db_context **lockptr;
NTSTATUS status;
if (db->lock_order != DBWRAP_LOCK_ORDER_NONE) {
dbwrap_lock_order_lock(db, &lockptr);
}
status = db->do_locked(db, key, fn, private_data);
if (db->lock_order != DBWRAP_LOCK_ORDER_NONE) {
dbwrap_lock_order_unlock(db, lockptr);
}
return status;
}
rec = dbwrap_fetch_locked(db, db, key);
if (rec == NULL) {
return NT_STATUS_NO_MEMORY;
}
fn(rec, private_data);
TALLOC_FREE(rec);
return NT_STATUS_OK;
}
int dbwrap_wipe(struct db_context *db)
{
if (db->wipe == NULL) {

5
lib/dbwrap/dbwrap.h
View File

@ -83,6 +83,11 @@ struct db_record *dbwrap_try_fetch_locked(struct db_context *db,
TDB_DATA key);
struct db_context *dbwrap_record_get_db(struct db_record *rec);
NTSTATUS dbwrap_do_locked(struct db_context *db, TDB_DATA key,
void (*fn)(struct db_record *rec,
void *private_data),
void *private_data);
NTSTATUS dbwrap_delete(struct db_context *db, TDB_DATA key);
NTSTATUS dbwrap_store(struct db_context *db, TDB_DATA key,
TDB_DATA data, int flags);

4
lib/dbwrap/dbwrap_private.h
View File

@ -68,6 +68,10 @@ struct db_context {
void *private_data,
enum dbwrap_req_state *req_state);
NTSTATUS (*parse_record_recv)(struct tevent_req *req);
NTSTATUS (*do_locked)(struct db_context *db, TDB_DATA key,
void (*fn)(struct db_record *rec,
void *private_data),
void *private_data);
int (*exists)(struct db_context *db,TDB_DATA key);
int (*wipe)(struct db_context *db);
int (*check)(struct db_context *db);