module V8
  class Portal
    class Caller
      
      def initialize(portal)
        @portal = portal
      end
      
      def raw
        begin
          yield
        rescue Exception => e
          case e
          when SystemExit, NoMemoryError
            raise e
          else
            error = V8::C::Exception::Error(V8::C::String::New(e.message))
            error.SetHiddenValue("TheRubyRacer::Cause", C::External::New(e))
            V8::C::ThrowException(error)
          end
        end
      end

      def protect(*args, &block)
        @portal.v8 raw(*args, &block)
      end

      def invoke(code, *args, &block)
        protect do
          code.call(*args, &block)
        end
      end
    end
  end
end