88 lines
2.7 KiB
Ruby
88 lines
2.7 KiB
Ruby
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# A Space is a collection of pages. It stores objects, the data for the objects,
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# not references. See Page for more detail.
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# Pages are stored by the object size they represent in a hash.
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# Space and Page work together in making *new* objects available.
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# "New" is slightly misleading in that normal operation only ever
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# recycles objects.
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module Parfait
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# The Space contains all objects for a program. In functional terms it is a program, but in oo
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# it is a collection of objects, some of which are data, some classes, some functions
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# The main entry is a function called (of all things) "main".
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# This _must be supplied by the compled code (similar to c)
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# There is a start and exit block that call main, which receives an List of strings
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# While data ususally would live in a .data section, we may also "inline" it into the code
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# in an oo system all data is represented as objects
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class Space < Object
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def initialize
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super()
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Parfait::Space.set_object_space self
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@classes = Parfait::Dictionary.new_object
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@syscall_message = nil # a hack sto store the message during syscall
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end
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attr_reader :classes , :next_message , :next_frame
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# need a two phase init for the object space (and generally parfait) because the space
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# is an interconnected graph, so not everthing is ready
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def late_init
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counter = 0
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@next_message = Message.new(nil)
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@next_frame = Frame.new(nil)
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5.times do |i|
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@next_message = Message.new @next_message
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@next_frame = Frame.new @next_frame
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end
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init_layout
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end
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@@object_space = nil
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# Make the object space globally available
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def self.object_space
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@@object_space
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end
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# TODO Must get rid of the setter
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def self.set_object_space space
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@@object_space = space
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end
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def get_main
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kernel = get_class_by_name :Object
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kernel.get_instance_method :main
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end
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def get_init
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kernel = get_class_by_name :Kernel
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kernel.get_instance_method :__init__
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end
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# this is the way to instantiate classes (not Parfait::Class.new)
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# so we get and keep exactly one per name
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def get_class_by_name name
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raise "uups #{name}.#{name.class}" unless name.is_a?(Symbol)
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c = @classes[name]
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puts "MISS, no class #{name} #{name.class}" unless c # " #{@classes}"
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c
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end
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def create_class name , superclass
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raise "uups " if name.is_a? String
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c = Class.new_object(name , superclass)
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@classes[name] = c
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end
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def sof_reference_name
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"space"
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end
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end
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# ObjectSpace
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# :each_object, :garbage_collect, :define_finalizer, :undefine_finalizer, :_id2ref, :count_objects
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end
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