Method: Tins::ThreadLocal#thread_local

Defined in:
lib/tins/thread_local.rb

#thread_local(name, default_value = nil) ⇒ Object

Define a thread local variable named name in this module/class. If the value value is given, it is used to initialize the variable.



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# File 'lib/tins/thread_local.rb', line 16

def thread_local(name, default_value = nil)
  is_a?(Module) or raise TypeError, "receiver has to be a Module"

  name = name.to_s
  my_id = "__thread_local_#{__id__}__"

  ObjectSpace.define_finalizer(self, @@cleanup)

  define_method(name) do
    Thread.current[my_id] ||= {}
    Thread.current[my_id][name]
  end

  define_method("#{name}=") do |value|
    Thread.current[my_id] ||= {}
    Thread.current[my_id][name] = value
  end

  if default_value
    Thread.current[my_id] = {}
    Thread.current[my_id][name] = default_value
  end
  self
end