Develop 5 threads by using threads concept and make sure if any of 3 threads are completed out of 5 threads then kill other 2 threads

[Surya_prakash.Kapireddy]

develop 5 threads by using threads concept and make sure if any of 3 threads are completed out of 5 threads then kill other 2 threads.

[dave_59]

Resume simulation when any 2 threads out of 3 get completed within fork-join_any

In reply to Sagar Shah: You can use a semaphore that waits for 2 keys semaphore s; s = new(0); fork begin : process1 ... s.put(1); end begin : process2 ... s.put(1); end begin : process3 ... s.put(1); end join_none s.get(2); disable fork; // kills remaining process s = null; // removes semaphore (if you plan to reuse s)

[rajt]

Hi @dave_59
Is it okay to use fine grain process here? What are the advantages of using semaphore instead of fine grain process?

[dave_59]

Read the discussion that follows in the posted link.

[Surya_prakash.Kapireddy]

Is this the right approach dave?

module tb;
    process p[5]; 
    int a = 0;
  event e1;
    initial begin
        fork
            begin
                p[0] = process::self();
              #($urandom_range(0,10));
                a++;
              $display("p[0].a=%0d",a);
              if(a>=3) 
                ->e1;
            end
            begin
                p[1] = process::self();
              #($urandom_range(0,10));
                a++;
              $display("p[1].a=%0d",a);
              if(a>=3) 
                ->e1;
            end
            begin
                p[2] = process::self();
              #($urandom_range(0,10));
                a++;
              $display("p[2].a=%0d",a);
              if(a>=3) 
                ->e1;
            end
            begin
                p[3] = process::self();
              #($urandom_range(0,10));
                a++;
              $display("p[3].a=%0d",a);
              if(a>=3) 
                ->e1;
            end
            begin
                p[4] = process::self();
              #($urandom_range(0,10));
                a++;
              $display("p[4].a=%0d",a);
              if(a>=3) 
                ->e1;
            end
        join_none 

      wait(e1.triggered);

        $display("Three threads have completed, terminating remaining at time %0t", $time);

        for (int i = 0; i < 5; i++) begin
            if (p[i].status == process::RUNNING) begin
                p[i].kill();
                $display("Thread %0d killed at time %0t", i+1, $time);
            end
        end

    end
endmodule

[dave_59]

Please format your code making your code easier for others to read. I have done that for you.

This will probably work but suffers the same problem that the semaphore solves–multithreaded access to the shared variable ‘a’.