#include "btree.h"
int btunlock(BTA* btact);
The btunlock function enables a process
to relinquish exclusive access to a file, originally gained
from a call to btlock.
btunlock is passed
btact, which holds the context pointer
of the B Tree file for which exclusive access is no longer
required.
If the B Tree file is not locked, or has been opened for
exclusive access, btunlock has no
effect.
A non-zero return from btunlock indicates
an error occurred.