[Ironruby-core] activerecord status with r110

Brian Blackwell brianblackwell at realemail.net
Fri May 16 20:01:12 EDT 2008


On Fri, 16 May 2008 14:54:32 -0700, "Curt Hagenlocher"
<curth at microsoft.com> said:
> Do you have any feeling for how these programs are using
> thread.critical=?

It's used by just one method in activesupport, instance_exec (which
seems to be a built-in method in Ruby 1.9). Here is the method from
active_support\core_ext\object\extending.rb:

  unless defined? instance_exec # 1.9
    module InstanceExecMethods #:nodoc:
    end
    include InstanceExecMethods

    # Evaluate the block with the given arguments within the context of
    # this object, so self is set to the method receiver.
    #
    # From Mauricio's
    http://eigenclass.org/hiki/bounded+space+instance_exec
    def instance_exec(*args, &block)
      begin
        old_critical, Thread.critical = Thread.critical, true
        n = 0
        n += 1 while respond_to?(method_name = "__instance_exec#{n}")
        InstanceExecMethods.module_eval { define_method(method_name,
        &block) }
      ensure
        Thread.critical = old_critical
      end

      begin
        send(method_name, *args)
      ensure
        InstanceExecMethods.module_eval { remove_method(method_name) }
        rescue nil
      end
    end
  end

Cheers,
Brian


More information about the Ironruby-core mailing list