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class ThreadGroup
Parent: Object
Version: 1.6

Index:

new add list

ThreadGroup provides a means of keeping track of a number of threads as a group. A Thread can belong to only one ThreadGroup at a time; adding a thread to a new group will remove it from any previous group.

Newly created threads belong to the same group as the thread from which they were created.

constants

Default Default thread group.

class methods
new ThreadGroup.new -> thgrp
Returns a newly created ThreadGroup. The group is initially empty.

instance methods
add thgrp.add( aThread ) -> thgrp
Adds the given thread to this group, removing it from any other group to which it may have previously belonged. 

puts "Initial group is #{ThreadGroup::Default.list}"
tg = ThreadGroup.new
t1 = Thread.new { sleep 10 }
t2 = Thread.new { sleep 10 }
puts "t1 is #{t1}"
puts "t2 is #{t2}"
tg.add( t1 )
puts "Initial group now #{ThreadGroup::Default.list}"
puts "tg group now #{tg.list}"

produces: 

Initial group is #<Thread:0x401965c8>
t1 is #<Thread:0x4018d554>
t2 is #<Thread:0x4018d518>
Initial group now #<Thread:0x4018d518>#<Thread:0x401965c8>
tg group now #<Thread:0x4018d554>

list thgrp.list -> anArray
Returns an array of all existing Thread objects that belong to this group.

ThreadGroup::Default.list -> [#<Thread:0x401965c8 run>]

Extracted from the book "Programming Ruby - The Pragmatic Programmer's Guide"
Copyright © 2000 Addison Wesley Longman, Inc. Released under the terms of the Open Publication License V1.0.
This reference is available for download.