system verilog example fork join / fork join_none/ fork join_any example codes

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*module test;

 int d,result;

  int a=2,b=3;

  

   function automatic mult(input int a,input int b,output int c);

       c=(a*b)+2;

       $display("inside function");

       $display("$time =%d,a=%d,b=%d,c=%d",$time,a,b,c);

   endfunction

 

   initial

     fork 

      begin

       #1;

       mult(2,3,d);

       $display("//////");

       $display("$time =%d,a=%d,b=%d,d=%d",$time,a,b,d);

      end

      begin

       #2;

       mult(2,4,d);

       $display("//////");

       $display("$time =%d,a=%d,b=%d,d=%d",$time,a,b,d);

      end

   join

endmodule*/






/*module test;

 int d,result;

  int a=2,b=3;

  

   function automatic mult(ref int a,ref int b,output int c);

       c=(a*b)+2;

       a++;

       $display("inside function");

       $display("$time =%d,a=%d,b=%d,c=%d",$time,a,b,c);

   endfunction

 

   initial

     fork 

      begin

       #1;

       //mult(2,3,d);

       mult(a,b,d);

       $display("//////");

       $display("$time =%d,a=%d,b=%d,d=%d",$time,a,b,d);

      end

      begin

       #2;

       //mult(2,4,d);

       mult(a,b,d);

       $display("//////");

       $display("$time =%d,a=%d,b=%d,d=%d",$time,a,b,d);

      end

   join

endmodule*/







/*module test;

 int d,result;

  int a=2,b=3;

  

   function  mult(input int a,input int b,output int c);

       c=(a*b)+2;

       a++;

       $display("inside function");

       $display("$time =%d,a=%d,b=%d,c=%d",$time,a,b,c);

   endfunction

 

   initial

     fork 

      begin

       #1;

       mult(a,b,d);

       $display("//////");

       $display("$time =%d,a=%d,b=%d,d=%d",$time,a,b,d);

      end

      begin

       #2;

       mult(a,b,d);

       $display("//////");

       $display("$time =%d,a=%d,b=%d,d=%d",$time,a,b,d);

      end

   join

endmodule*/




/*

module test;

 int d,result;

  int a=2,b=3;

  

   task automatic mult(input int a,input int b,output int c);

       c=(a*b)+2;

       a++;

       $display("inside function");

       $display("$time =%d,a=%d,b=%d,c=%d",$time,a,b,c);

   endtask

 

   initial

     fork 

      begin

       #1;

       mult(a,b,d);

       $display("//////");

       $display("$time =%d,a=%d,b=%d,d=%d",$time,a,b,d);

      end

      begin

       #2;

       mult(a,b,d);

       $display("//////");

       $display("$time =%d,a=%d,b=%d,d=%d",$time,a,b,d);

      end

   join

endmodule

*/





/*

module test;

 int d,result;

  int a=2,b=3;

  

   task automatic mult(input int a,input int b,output int c);

       c=(a*b)+2;

       a++;

        $display("inside function");

       $display("$time =%d,a=%d,b=%d,c=%d",$time,a,b,c);

   endtask

 

   initial

     fork 

      begin

       #1;

       mult(2,3,d);

       $display("//////");

       $display("$time =%d,a=%d,b=%d,d=%d",$time,a,b,d);

      end

      begin

       #2;

       mult(2,4,d);

       $display("//////");

       $display("$time =%d,a=%d,b=%d,d=%d",$time,a,b,d);

      end

   join

endmodule

*/





/*class pass_by_ref;

  int refr=2;

  int val=2;


   function automatic int check_refer(ref int r);

                  $display("pass by ref");

                  $display("initial value of refr=%d",r);

                  r++;

                  $display("after incrementing %d",r);

  endfunction

  function int check_value(int v);

                  $display("pass by value");

                  $display("initial value of value=%d",v);

                  v++;

                  $display("after incrementing %d",v);

   endfunction

endclass


pass_by_ref h1;

module test;

 initial

  begin

   h1=new();

   h1.check_refer(h1.refr);

   h1.check_value(h1.val);

   $display("inside memory");

   $display("%d",h1.refr);

   $display("%d",h1.val);

   end

endmodule*/






module test;

 task dummy_task(input int x,string str);

   fork

     begin

       #x;

     end

     begin

       #10;

     end

    join_any

    disable fork;

    $display("%s:%t",str,$time);

    endtask

   initial

    fork

      begin

        #2;

        dummy_task(5,"call_1");

       end

       begin

        #1;

        dummy_task(15,"call_2");

       end

     join

  endmodule

`




/*

module test;

 int d,result;

  int a=2,b=3;

  

   function automatic mult(input int a,input int b,output int c);

       c=(a*b)+2;

       $display("inside function");

       $display("$time =%d,a=%d,b=%d,c=%d",$time,a,b,c);

   endfunction

 

   initial

     fork 

      begin

       #1;

       mult(2,3,d);

       $display("//////");

       $display("$time =%d,a=%d,b=%d,d=%d",$time,a,b,d);

      end

      begin

       #2;

       mult(2,4,d);

$display("//////");

       $display("$time =%d,a=%d,b=%d,d=%d",$time,a,b,d);

      end

   join

endmodule

*/





/*

module test;

 int d,result;

  int a=2,b=3;

  

   function automatic mult(ref int a,ref int b,output int c);

       c=(a*b)+2;

       a++;

       $display("inside function");

       $display("$time =%d,a=%d,b=%d,c=%d",$time,a,b,c);

   endfunction

 

   initial

     fork 

      begin

       #1;

       //mult(2,3,d);

       mult(a,b,d);

       $display("//////");

       $display("$time =%d,a=%d,b=%d,d=%d",$time,a,b,d);

      end

      begin

       #2;

       //mult(2,4,d);

       mult(a,b,d);

       $display("//////");

       $display("$time =%d,a=%d,b=%d,d=%d",$time,a,b,d);

      end

   join

endmodule

*/




/*

module test;

 int d,result;

  int a=2,b=3;

  

   function  mult(input int a,input int b,output int c);

       c=(a*b)+2;

       a++;

       $display("inside function");

       $display("$time =%d,a=%d,b=%d,c=%d",$time,a,b,c);

   endfunction

 

   initial

     fork 

      begin

       #1;

       mult(a,b,d);

       $display("//////");

       $display("$time =%d,a=%d,b=%d,d=%d",$time,a,b,d);

      end

      begin

       #2;

       mult(a,b,d);

       $display("//////");

       $display("$time =%d,a=%d,b=%d,d=%d",$time,a,b,d);

      end

   join

endmodule

*/




/*module test;

 int d,result;

  int a=2,b=3;

  

   task automatic mult(input int a,input int b,output int c);

       c=(a*b)+2;

       a++;

       $display("inside function");

       $display("$time =%d,a=%d,b=%d,c=%d",$time,a,b,c);

   endtask

 

   initial

     fork 

      begin

       #1;

       mult(a,b,d);

       $display("//////");

       $display("$time =%d,a=%d,b=%d,d=%d",$time,a,b,d);

      end

      begin

       #2;

       mult(a,b,d);

       $display("//////");

       $display("$time =%d,a=%d,b=%d,d=%d",$time,a,b,d);

      end

   join

endmodule*/




/*module test;

int ma=20;

function void pass_by_value(int fa);

fa=fa*2;

$display("inside the function pass_by_value fa=%d", fa);

endfunction : pass_by_value


function automatic void pass_by_ref(ref int fa);

fa=fa*2;

$display(" inside the function pass_by_ref fa=%d",fa);

endfunction:pass_by_ref


initial

begin

pass_by_value(ma);

$display("after calling the function pass_by_value ma=%d", ma);

pass_by_ref(ma);

$display("after calling the function pass_by_ref ma=%d", ma);

end

endmodule:test*/







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