Support for the Ruby 2.1 series ended on March 31 2017. See here for details.
BasicObject
This class watches for termination of multiple threads. Basic functionality (wait until specified threads have terminated) can be accessed through the class method ThreadsWait.all_waits. Finer control can be gained using instance methods.
Example:
ThreadsWait.all_waits(thr1, thr2, ...) do |t| STDERR.puts "Thread #{t} has terminated." end th = ThreadsWait.new(thread1,...) th.next_wait # next one to be done