lock_point
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lock_point

lock_point — locks or unlocks points.

Synopsis

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 a DataHub instance. 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>

See Also

set_security, point_locked

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