How to use sc_elab_and_sim?

[howardhsu]

Hi, 

 

I was trying to figure out how to run SystemC simulation in a main function.

I have read LRM 4.3.2, Function sc_elab_and_sim, but still can't get it.

 

This is what I did: 

 

int sc_elab_and_sim(int argc, char *argv[])

{

  if (argc == 0) {

    //Initialize modules and connect them

 

    sc_core::sc_start();

    return 0;

  }

  else{

    //Initialize another set of modules and connect them

 

    sc_core::sc_start();

    return 0;

  }

}

 

int main()

{

 

 sc_elab_and_sim(0, argv);

 

 sc_elab_and_sim(1, argv);

 

  return 0;

}

 

I use argc to decide which set of modules I want to run, just for test.

And I got an exception when it starting second sc_start:

 

libc++abi.dylib: terminating with uncaught exception of type sc_core::sc_report: Error: (E529) insert module failed: simulation running

In file: ../../../../src/sysc/kernel/sc_module_registry.cpp:47

 

I must did something wrong, can anyone tell me?

 

Actually I want to do unit test. Is this the right way or there are other better solutions?

 

Thanks!

[dakupoto]

 

Hi, 

 

I was trying to figure out how to run SystemC simulation in a main function.

I have read LRM 4.3.2, Function sc_elab_and_sim, but still can't get it.

 

This is what I did: 

 

int sc_elab_and_sim(int argc, char *argv[])

{

  if (argc == 0) {

    //Initialize modules and connect them

 

    sc_core::sc_start();

    return 0;

  }

  else{

    //Initialize another set of modules and connect them

 

    sc_core::sc_start();

    return 0;

  }

}

 

int main()

{

 

 sc_elab_and_sim(0, argv);

 

 sc_elab_and_sim(1, argv);

 

  return 0;

}

 

I use argc to decide which set of modules I want to run, just for test.

And I got an exception when it starting second sc_start:

 

libc++abi.dylib: terminating with uncaught exception of type sc_core::sc_report: Error: (E529) insert module failed: simulation running

In file: ../../../../src/sysc/kernel/sc_module_registry.cpp:47

 

I must did something wrong, can anyone tell me?

 

Actually I want to do unit test. Is this the right way or there are other better solutions?

 

Thanks!

Hello Sir,

Could you be a bit more specific. It is not clear why you would want to use

this method "sc_elab_and_sim". Typically, one would use "sc_main"

as in a sample listed below:

int sc_main(int argc, char **argv)

{

  /*Declare/define signal channels */

 /* Declare/define a clock if needed */

 /* Declare/define user-defined modules */

 /* Using the signal channels declared/defined

    previously, interconnect modules */

/* Declare define trace file if needed, and

then connect to correct port/channels to examine output */

?* Start simulation, and run for a pre-defined time

period */

}

 

Hope that helps.

[howardhsu]

Hello dakupoto, 

 

Thanks for the reply!

I want to do unit testing in the main function.

For example, I have a priority queue and I want to test whether it works as my expect.

I hope I can do one test at a time, like in first one I test whether it can be written and read;

and test whether the priority is as my expect in the second test. 

 

I want the queue to be "clean" or is a new one before each test starts.

And each test is judged with assert statement.

If I wrote this in a sequence of actions in sc_main, if one test is failed, the following tests will not be executed.

So I was thinking to lunch many SystemC simulation in the main function, each of them do one test.

Then I can gather the test results and make a report.

 

The pseudo code in my original post is referenced from here:

 

http://www.accellera.org/Discussion_Forums/helpforum/archive/msg/msg?list_name=help_forum&monthdir=200509&msg=msg00077.html

 

Now I am trying other ways like reset my modules between every tests or create many instances 

and each one of them is used to run one test. 

 

I found that my question should be "How to do unit testing in SystemC" .

But still I am curious about how to use sc_elab_and_sim.

If anyone could give me a simple example, I'd appreciate it!

[David Black]

The PoC SystemC simulator implementation is not designed to be restarted at time zero. Thus you cannot run two simulations within one main.

[howardhsu]

Alright... 

 

Thanks for reply!