module ThreadSafe::Util::Volatile

def attr_volatile(*attr_names)

end
end
cas_foo(1, 2) # => true | a strong CAS
self.foo = 1 # volatile write
my_foo = foo # volatile read
def hello

end
self.bar = bar
super() # must super() into parent initializers before using the volatile attribute accessors
def initialize(bar)

attr_volatile :foo, :bar
extend ThreadSafe::Util::Volatile
class Foo
Usage:

atop of the +AtomicReference+s.
Provides +volatile+ (in the JVM's sense) attribute accessors implemented 
def attr_volatile(*attr_names)
  return if attr_names.empty?
  include(Module.new do
    atomic_ref_setup = attr_names.map {|attr_name| "@__#{attr_name} = ThreadSafe::Util::AtomicReference.new"}
    initialize_copy_setup = attr_names.zip(atomic_ref_setup).map do |attr_name, ref_setup|
      "#{ref_setup}(other.instance_variable_get(:@__#{attr_name}).get)"
    end
    class_eval <<-RUBY_EVAL, __FILE__, __LINE__ + 1
      def initialize(*)
        super
        #{atomic_ref_setup.join('; ')}
      end
      def initialize_copy(other)
        super
        #{initialize_copy_setup.join('; ')}
      end
    RUBY_EVAL
    attr_names.each do |attr_name|
      class_eval <<-RUBY_EVAL, __FILE__, __LINE__ + 1
        def #{attr_name}
          @__#{attr_name}.get
        end
        def #{attr_name}=(value)
          @__#{attr_name}.set(value)
        end
        def compare_and_set_#{attr_name}(old_value, new_value)
          @__#{attr_name}.compare_and_set(old_value, new_value)
        end
      RUBY_EVAL
      alias_method :"cas_#{attr_name}", :"compare_and_set_#{attr_name}"
      alias_method :"lazy_set_#{attr_name}", :"#{attr_name}="
    end
  end)
end