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