Wait for more than one processes of fork...join_none to complete

In our project some time we want to wait for more than one process which is invoked from fork...join_none or join_any before proceeding further.

How to achieve this using SystemVerilog constructs, that we will understand through an example.

Let's go through below code,
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	class abc;
	semaphore s;
	function new();
	s = new(0); // Initialized with zero key
	endfunction : new
	task multiple_process();
	fork
	begin : process1
	#5;
	$display ($time," process1");
	s.put(1);
	end
	begin
	#10;
	$display ($time," process2");
	s.put(1);
	end
	begin
	#15;
	$display ($time," process3");
	s.put(1);
	end
	begin
	#12;
	$display ($time," process4");
	s.put(1);
	end
	join_none // You can use join_any also
	s.get(2); // wait for any two process to be completed
	disable fork; // kills remaining process
	s = null; // removes semaphore (if you plan to reuse s)
	$display ($time," multiple_process completed");
	endtask : multiple_process
	endclass : abc
	module top();
	abc A;
	initial begin
	A = new();
	A.multiple_process();
	end
	endmodule : top
	//Output:
	// 5 process1
	// 10 process2
	// 10 multiple_process completed

view raw wait_for_more_than_1_process_using_fork_join.sv hosted with ❤ by GitHub

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In above code, class abc is having one method named multiple_process().
In API, within fork...join_none 4 process are invoked in parallel.
Each process puts one key into semaphore just before it's completed (Initially semaphore doesn't have any key).

After fork...join_none, I am waiting for semaphore to get at least two key ().