module Roo::Helpers::WeakInstanceCache
Private Instance Methods
instance_cache(key) { || ... }
click to toggle source
# File lib/roo/helpers/weak_instance_cache.rb, line 10 def instance_cache(key) object = nil if instance_variable_defined?(key) && (ref = instance_variable_get(key)) && ref.weakref_alive? begin object = ref.__getobj__ rescue => e unless (defined?(::WeakRef::RefError) && e.is_a?(::WeakRef::RefError)) || (defined?(RefError) && e.is_a?(RefError)) raise e end end end unless object object = yield ObjectSpace.define_finalizer(object, instance_cache_finalizer(key)) instance_variable_set(key, WeakRef.new(object)) end object end
instance_cache_finalizer(key)
click to toggle source
# File lib/roo/helpers/weak_instance_cache.rb, line 32 def instance_cache_finalizer(key) proc do |object_id| if instance_variable_defined?(key) && (ref = instance_variable_get(key)) && (!ref.weakref_alive? || ref.__getobj__.object_id == object_id) remove_instance_variable(key) end end end