1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
# frozen_string_literal: false
require_relative 'drb'
require 'monitor'
module DRb
# To use WeakIdConv:
#
# DRb.start_service(nil, nil, {:idconv => DRb::WeakIdConv.new})
class WeakIdConv < DRbIdConv
class WeakSet
include MonitorMixin
def initialize
super()
@immutable = {}
@map = ObjectSpace::WeakMap.new
end
def add(obj)
synchronize do
begin
@map[obj] = self
rescue ArgumentError
@immutable[obj.__id__] = obj
end
return obj.__id__
end
end
def fetch(ref)
synchronize do
@immutable.fetch(ref) {
@map.each { |key, _|
return key if key.__id__ == ref
}
raise RangeError.new("invalid reference")
}
end
end
end
def initialize()
super()
@weak_set = WeakSet.new
end
def to_obj(ref) # :nodoc:
return super if ref.nil?
@weak_set.fetch(ref)
end
def to_id(obj) # :nodoc:
return @weak_set.add(obj)
end
end
end
# DRb.install_id_conv(WeakIdConv.new)
|
