Caché Basic Reference
Obtains a logical lock on a variable name.
||Name of the variable to be locked.
||Optional A numeric expression indicating the number of seconds to wait to obtain the lock.
Returns true if the lock was obtained, false otherwise.
Each time a lock is obtained on a varname
a lock count is incremented for this varname
decrements this count. Only when the lock count falls to zero will the logical lock be released. For this reason, you should balance each call to Lock
with a corresponding call to Unlock
If a timeout
is not specified, Lock
will wait indefinitely for the lock to be obtained. Specifying a timeout
causes the lock attempt to wait up to the timeout number of seconds to obtain the lock.
The following example uses the Lock
function to obtain a logical lock on a varname
with a timeout of 10 seconds.
If Lock(^PatientData(PatientID), 10) = True Then
Println "Got the Lock"
Println "Couldn't get the lock"