The DbLock::put method releases lock from the lock table.
The DbLock::put method either returns a non-zero error value or throws an exception that
encapsulates a non-zero error value on failure, and returns 0 on success.
Errors
The DbLock::put method may fail and throw an exception or return a non-zero error for the following conditions:
EINVAL
An invalid flag value or parameter was specified.
The DbLock::put method may fail and throw an exception or return a non-zero error for errors specified for other Berkeley DB and C library or system methods.
If a catastrophic error has occurred, the DbLock::put method may fail and either
return DB_RUNRECOVERY or throw an exception encapsulating
DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail
in the same way.