thread-fiber-locals

locals.rb

RUBY_DESCRIPTION 
# => "ruby 1.9.3p448 (2013-06-27 revision 41675) [x86_64-darwin13.0.0]"

Thread.current[:some_local]              # => nil
Thread.current[:some_local] = 'main'     # => "main"
Thread.current[:some_local]              # => "main"

f1 = Fiber.new do 
  Thread.current[:some_local]            # => nil
  Thread.current[:some_local] = 'f1'     # => "f1"
  Thread.current[:some_local]            # => "f1"
end

f2 = Fiber.new do
  Thread.current[:some_local]            # => nil
  Thread.current[:some_local] = 'f1'     # => "f1"
  Thread.current[:some_local]            # => "f1"
end


Thread.current[:some_local]              # => "main"

f1.resume
f2.resume