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#
# $Id$
# Copyright (C) 1998 Yukihiro Matsumoto. All rights reserved.
# The ObjectSpace extension:
#
# ObjectSpace.define_finalizer(obj, proc=lambda())
#
# Defines the finalizer for the specified object.
#
# ObjectSpace.undefine_finalizer(obj)
#
# Removes the finalizers for the object. If multiple finalizers are
# defined for the object, all finalizers will be removed.
#
module ObjectSpace
Finalizers = {}
def define_finalizer(obj, proc=lambda())
ObjectSpace.call_finalizer(obj)
if assoc = Finalizers[obj.id]
assoc.push(proc)
else
Finalizers[obj.id] = [proc]
end
end
def undefine_finalizer(obj)
Finalizers.delete(obj.id)
end
module_function :define_finalizer, :undefine_finalizer
Generic_Finalizer = proc {|id|
if Finalizers.key? id
for proc in Finalizers[id]
proc.call(id)
end
Finalizers.delete(id)
end
}
add_finalizer Generic_Finalizer
end
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