From: Yehuda Katz <redmine@...>
Date: 2009-07-18T14:22:16+09:00
Subject: [ruby-core:24418] [Bug #1717] Thread local variables not visible from within a Fiber

Issue #1717 has been updated by Yehuda Katz.


You could do:

  t = Thread.new(Thread.current) do |parent|
    # access to parent
  end

It seems that having fibers have their own Thread.local is a good thing; otherwise, people who store local things inside of Thread-local variables could have their details suddenly swapped out in certain circumstances.

You could even do:

  class Thread
    def self.inherit
      parent = Thread.current
      new do
        parent.keys.each do |key|
          next if key =~ /^__/
          Thread.current[key] = parent[key]
        end
        yield
      end
    end
  end

Which would be used like Thread.new, but automatically copy the parent's thread-locals to the new thread.
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http://redmine.ruby-lang.org/issues/show/1717

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