Experimental Physics and
Industrial Control System

Eric Norum <[email protected]> · Fri, 7 Nov 2014 09:15:42 -0800

double foo[7];
size_t s = sizeof foo;

An almost any machine architecture now in use it is expected that s would be 56 — 7 elements, 8 bytes each.

Also — is the code below an accurate copy?  The if statement contains an assignment, not a conditional.

> On Nov 7, 2014, at 9:02 AM, Brown, David L. <[email protected]> wrote:
> 
> Hi, all,
> 
> I got around the problem.  I don’t know why this is, but when one defines
> an array size of 7 elements (like as seen below), assigns them to an array
> of three elements outside the state machine, and then reassigns the
> elements inside the state machine, there is no core dump.  I also looked
> at the size of the array MPS and it said that my array was a size of 56 as
> opposed to the 7 elements I defined.  I have convinced myself that this
> was a memory allocation problem as the array size (as interpreted by the
> state machine) was different than what I expected it to be.  Perhaps I
> have a fundamental misunderstanding of how to initially assign variables
> in C?  Thank you all for your help and tips.  Here is the working code I
> referenced above (still needs testing, but core dumps don’t happen):
> 
> char fcoutpreamble[40];
> char fcokpreamble[40];
> 
> char blah[40];
> int i;
> double MPS[7];
> assign
> {
> 	“PV1”,
> 	“PV2”,
> 	“PV3”
> }
> 
> Monitor MPS;
> 
> SS Machine
> {
> 	state Start
> 	{
> 		when()
> 		{
> 			if( PV1 = TRUE)
> 			{
> 				/* set arguments here*/
> 				i = sprintf(blah, “%s_input\n”,fcoutpreamble);
> 				assert( i <= sizeof(blah));
> 				pvAssign (MPS[2],blah);
> 				i = sprintf(blah, “%s_raw\n”,fcoutpreamble);
> 				assert( i <= sizeof(blah));
> 				pvAssign (MPS[3],blah);
> 				i = sprintf(blah, “%s_input\n”,fcokpreamble);
> 				assert( i <= sizeof(blah));
> 				pvAssign (MPS[4],blah);
> 				i = sprintf(blah, “%s_raw\n”,fcokpreamble);
> 				assert( i <= sizeof(blah));
> 				pvAssign (MPS[5],blah);
> 				i = sprintf(blah, “PV3”);
> 				assert( i <= sizeof(blah));
> 				pvAssign (MPS[6],blah);
> 			}
> 
> 			else
> 			{
> 				/* set arguments here*/
> 			}
> 		}state Idle
> 	}
> }
> 
> Dave				
> 

-- 
Eric Norum
[email protected]

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System