Experimental Physics and
Industrial Control System

I would like to know if protocol clauses for Stream Device protocols are atomic. For example, if one thread is processing clause

 

# /// Read the input curve number

getINCRV {

   out "INCRV? \$1";

   in "%d"

}

 

and another thread is simultaneously processing (in the same IOC) clause

 

getInputCurveNumber {

   out "INCRV? \$2";

   in "%(\$1)d";

}

 

can these collide and interfere with each other? Or is there a blocking mechanism to help ensure that the ‘in’ of one clause is really the response to the preceding ‘out’ of the same clause?

 

Thank you,

 

--Ray