fork join_any
Fork-Join_any will be unblocked after the completion of any of the Processes.

fork join any example
In the below example,
fork block will be blocked until the completion of any of the Process Process-1 or Process-2.
Both Process-1 and Process-2 will start at the same time, Process-1 will finish at 5ns and Process-2 will finish at 20ns. fork-join_any will be unblocked at 5ns.
module fork_join; initial begin $display("-----------------------------------------------------------------"); fork //Process-1 begin $display($time,"\tProcess-1 Started"); #5; $display($time,"\tProcess-1 Finished"); end //Process-2 begin $display($time,"\tProcess-2 Started"); #20; $display($time,"\tProcess-2 Finished"); end join_any $display($time,"\tOutside Fork-Join"); $display("-----------------------------------------------------------------"); end endmodule
Simulator Output
-------------------------------------------------------- 0 Thread-1 Started 0 Thread-2 Started 5 Thread-1 Finished 5 Outside Fork-Join ----------------------------------------------------------------- 20 Process-2 Finished