Issue #5958 has been updated by mame (Yusuke Endoh).

Status changed from Open to Assigned
Assignee set to ko1 (Koichi Sasada)

Sasada-san, what do you think?

-- 
Yusuke Endoh <mame / tsg.ne.jp>
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Feature #5958: ThreadGroup#join
https://bugs.ruby-lang.org/issues/5958#change-25382

Author: Glass_saga (Masaki Matsushita)
Status: Assigned
Priority: Normal
Assignee: ko1 (Koichi Sasada)
Category: core
Target version: 


=begin
I propose the method ThreadGroup#join.
Calling thread waits all threads in receiving threadgroup.

 thgrp = ThreadGroup.new
 thgrp.add(Thread.new{ sleep 1 })
 thgrp.join #=> #<ThreadGroup:0x007ff257d6d098>

Time limit to run the threads in the threadgroup can be specified.
If the time limit expires, nil will be returned.

 thgrp = ThreadGroup.new
 thgrp.add(Thread.new{})
 thgrp.add(Thread.new{ sleep })
 thgrp.join(0.1) #=> nil

I think it is useful to wait grouped threads together.
=end


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