Ruby » Ruby master

Feature #5958

Updated by nobu (Nobuyoshi Nakada) almost 5 years ago

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

 ```ruby 
 threadgroup. 

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

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

 ```ruby 
 

  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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