remove virtual frame (just using parfait)
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@ -2,8 +2,28 @@
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# A Frame is set up by functions that use local variables or temporary variables
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# in fact temporary variables are local variables named by the system
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# It allows for access to those variables basically
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# It allows for access to those variables basically
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# A Message and a Frame make up the two sides of message passing:
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# A Message (see details there) is created by the sender and control is transferred
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# A Frame is created by the receiver
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# In static languages these two objects are one, because the method is known at compile time.
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# In that case the whole frame is usually on the stack, for leaves even omitted and all data is
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# held in registers
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#
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# In a dynamic language the method is dynamically resolved, and so the size of the frame is not
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# know to the caller
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# Also exceptions (with the possibility of retry) and the idea of being able to take and store
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# bindings make it, to say the very least, unsensibly tricky to store them on the stack. So we don't.
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# Also at runtime Messages and Frames remain completely "normal" objects. Ie have layouts and so on.
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# Which resolves the dichotomy of objects on the stack or heap. Sama sama.
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class Frame < Object
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def initialize locals , temps
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@locals = locals
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@tmps = tmps
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end
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attr_accessor :locals , :tmps
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end
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@ -19,7 +19,7 @@ module Virtual
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#global objects (data)
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@objects = []
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@symbols = []
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@frames = 100.times.collect{ ::Frame.new }
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@frames = 100.times.collect{ ::Frame.new([],[])}
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@messages = 100.times.collect{ ::Message.new }
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@next_message = @messages.first
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@next_frame = @frames.first
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@ -1,23 +0,0 @@
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module Virtual
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# A Message and a Frame make up the two sides of message passing:
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# A Message (see details there) is created by the sender and control is transferred
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# A Frame is created by the receiver
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# In static languages these two objects are one, because the method is known at compile time.
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# In that case the whole frame is usually on the stack, for leaves even omitted and all data is held in registers
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#
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# In a dynamic language the method is dynamically resolved, and so the size of the frame is not know to the caller
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# Also exceptions (with the possibility of retry) and the idea of being able to take and store bindings
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# make it, to say the very least, unsensibly tricky to store them on the stack. So we don't.
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# Also at runtime Messages and Frames remain completely "normal" objects. Ie have layouts and so on. Which resolves the
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# dichotomy of objects on the stack or heap. Sama sama.
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class Frame
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def initialize locals , temps
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@locals = locals
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@tmps = tmps
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end
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attr_accessor :locals , :tmps
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end
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end
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