Experimental Physics and
Industrial Control System

Thank you again for your responses.  Unfortunately, I have encountered another problem, this time involving code that has been escaped to C.  The new version of my program is shown below.  Without the re-entrant option, the code runs perfectly fine.  With the re-entrant option, however, I am met with several errors. The SNL user's manual says that the SNC automatically refers to variables in the struct UserVar by running the code " pVar->xxx", but that such references have to be handled manually for escaped C code. How do I handle such situations manually?

/* Sample Program */
program sncExample

option +r; /* reentrant */

float i;

float pv;
assign pv to "testioc:magnet{mag}";

%{

    void helloWorld(i) {     <<<<<==== Here you've not specified a type for 'i', so the compiler assumes it to be an 'int'.
        printf("Hello World! You have just called a C function, and the variable i is %5.1f \n", i);   <<<<====== But here you tell printf that the argument being passed to be printed is a double-precision floating point value.   

    }

}%

ss ss1 {

   state one {
       when() {
       i = 1;
       %% helloWorld(i);   <<<<===== Reentrant state sets have variables placed into a structure so you need to say %% helloWorld(pVar->i); -- see the SNL manual for details

       pv = 1;
       pvPut(pv);
       sleep(1);
       } state two
   }

   state two {
       when () {
       i = 2;
       %% helloWorld(i);
       pv = 2;
       pvPut(pv);
       sleep(1);
       } state one
   }

}


Thanks,

Brad Pietrzak