rubyx/lib/register/positioned.rb

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2016-12-06 10:38:09 +01:00
# Helper module that extract position attribute.
module Positioned
@@positions = {}
def self.positions
@@positions
end
def position
pos = Positioned.positions[self]
if pos == nil
str = "position accessed but not set, "
str += "#{Register.machine.objects.has_key?(self.object_id)}, at #{self.object_id.to_s(16)}\n"
raise str + "for #{self.class} byte_length #{byte_length} for #{self.inspect[0...100]}"
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end
pos
end
def position= pos
raise "Position must be number not :#{pos}:" unless pos.is_a?(Numeric)
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# resetting of position used to be error, but since relink and dynamic instruction size it is ok.
# in measures (of 32)
old = Positioned.positions[self]
if old != nil and ((old - pos).abs > 10000)
raise "position set again #{pos}!=#{old} for #{self}"
end
Positioned.positions[self] = pos
end
end