lock_point
lock_point — locks or unlocks points.
Syntax
lock_point (symbol, locked)
Arguments
- symbol
A point name, as a symbol.
- locked
t to set a lock,
nil to
release a lock.
Returns
t if the function
is successful, otherwise nil.
Description
This function locks or unlocks a point in the Cascade DataHub. The
current security level must be greater than or equal to the
security level on the point.
Example
Gamma> init_ipc("locker","lq");
t
Gamma> write_point(#a,5);
t
Gamma> lock_point(#a,t);
t
Gamma> write_point(#a,300);
nil
Gamma> lock_point(#a,nil);
t
Gamma> write_point(#a,300);
t
Gamma>
