sc_event_queue query

[Hiten]

Hello,

 

I am having an SC_THREAD as follows

 

//

//

SC_THREAD(my_proc);

sensitive << event_1;

dont_initialize();
//

//

//

 

void my_proc()

{

  while(1)

   {

    wait(10,SC_NS);

    cout << " Display ok";

    wait(event_1);

   }

}

 

My question is i am having an situation where this event get triggered repetedly in short instance of time, lets say at time t=2 ns it get triggered then SC_THREAD starts, then again it get triggered at t=4ns, but this triggerring of event goes unnoticed.

 

I saw some post and from them i got to know that i cant even use sc_event_queue as i am using wait in my thread.

What can be alternative to implement this logic.

Thanks.

[Philipp A Hartmann]

I may completely miss the modeling intent, but if you want the process to be triggered upon each event notification or after ten nanoseconds at the latest, maybe you can use a wait with a timeout?

  wait(10,SC_NS); // startup? (trying to stay close to the original code)
  while(1)
  {
    cout << " Display ok";
    wait( sc_time(10, SC_NS), event_1 ); // wakeup upon event_1, after 10ns at the latest
  }

Would this help in your scenario?

 

Greetings from Duisburg,
  Philipp

[sudha]

hi,

 

sc_event_queue is not sc_event.

 

in the example above instead of declaring event_1 as sc_event declare it as

 

sc_event_queue event_1;

 

what it does is whenever you notify the event_1, it adds/list it in queue. so you don't miss any event happened on event_1. but you can't list the immediate notification(meaning event1.notify() won't list anything in the queue as it is immediate. event1.notify(sc_zero_time) will work.

 

not sure, whether it was your question.

 

thanks,

sudha.