Scope of disable fork

SystemVerilog
8

In reply to yakirye:

Yes, what you wrote works under one condition—there is only one invocation of my_task. If there are multiple invocations, disable sec_fork kills all of them.

There are a couple better ways of coding this. You can put a fork/join as a process guard.

task my_task()
  fork : first_fork
    task1;
   task2;
  join_any : first_fork
  fork 
    begin : sec_fork_guard
      fork : sec_fork
        task3;
        task4;
      join_any : sec_fork
      disable fork; // only disable inside sec_fork_guard block
    end : sec_fork_guard
  join
endtask : my_task

And for complete control, you can use the process class

task my_task()
  process p[$];
  fork : first_fork
    task1;
   task2;
  join_any : first_fork 
  fork : sec_fork
    begin
      p.push_back(process::self();
      task3;
    end
    begin
      p.push_back(process::self();
      task4;
    end
  join_any
  foreach(p[i]) if (p[i].status != process::FINISHED) p[i].kill();
endtask : my_task
1 Like