36 lines
1.0 KiB
Ruby
36 lines
1.0 KiB
Ruby
|
|
# A message is what is sent when you invoke a method. Args and stuff are packed up in to a Message
|
|
# and the Message is sent to the receiver.
|
|
|
|
# Part of the housekeeping (see attributes) makes messages a double linked list (next_message and
|
|
# caller) , and maybe surprisingly this means that we can create all messages at runtime
|
|
# and link them up and never have to touch that list again.
|
|
# All the args and receiver data changes, but the list of messages stays constant.
|
|
|
|
module Parfait
|
|
class Message < Object
|
|
attributes [:next_message , :receiver , :frame , :return_address ]
|
|
attributes [:return_value, :caller , :name ]
|
|
|
|
include Indexed
|
|
self.offset(8) # 8 == the seven attributes above + layout. (indexed_length gets added)
|
|
|
|
def initialize next_m
|
|
self.next_message = next_m
|
|
self.frame = Frame.new()
|
|
self.caller = nil
|
|
super()
|
|
end
|
|
|
|
|
|
def set_caller caller
|
|
self.caller = caller
|
|
end
|
|
|
|
def get_type_for(name)
|
|
index = @layout.get_index(name)
|
|
get_at(index)
|
|
end
|
|
end
|
|
end
|