NAME¶
tdb_chainlock - lock a group of keys tdb_chainunlock - unlock a previously
locked group of keys
SYNOPSIS¶
#include <tdb.h>
int tdb_chainlock(TDB_CONTEXT *tdb, TDB_DATA key);
void tdb_chainunlock(TDB_CONTEXT *tdb, TDB_DATA key);
DESCRIPTION¶
tdb_chainlock is a low-level function used to lock a particular key (and
a number of other keys) without any checking: any other process attempting to
perform tdb operations on those keys will block until
tdb_chainunlock
is called.
NOTES¶
It is the user's responsibility to ensure that they do not deadlock the database
using these functions: something which is impossible using the other access
functions.
RETURN VALUE¶
A return value of 0 indicates success and -1 indicates failure.
AUTHORS¶
Software: Andrew Tridgell <tridge@linuxcare.com> Man page: Rusty.
SEE ALSO¶
gdbm(3),
tdb(3),
tdb_lockall(3).