Sha256: c0320ac328d71b11d37edceebe695a7a051dc70513f9dac989a5f4bb9cd59820
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Size: 1.05 KB
Versions: 8
Compression:
Stored size: 1.05 KB
Contents
# frozen_string_literal: true
require "weakref"
module Roo
module Helpers
module WeakInstanceCache
private
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
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
end
end
end
Version data entries
8 entries across 8 versions & 2 rubygems