/usr/lib/ruby/1.8/drb/timeridconv.rb is in libruby1.8 1.8.7.352-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 | require 'drb/drb'
require 'monitor'
module DRb
class TimerIdConv < DRbIdConv
class TimerHolder2
include MonitorMixin
class InvalidIndexError < RuntimeError; end
def initialize(timeout=600)
super()
@sentinel = Object.new
@gc = {}
@curr = {}
@renew = {}
@timeout = timeout
@keeper = keeper
end
def add(obj)
synchronize do
key = obj.__id__
@curr[key] = obj
return key
end
end
def fetch(key, dv=@sentinel)
synchronize do
obj = peek(key)
if obj == @sentinel
return dv unless dv == @sentinel
raise InvalidIndexError
end
@renew[key] = obj # KeepIt
return obj
end
end
def include?(key)
synchronize do
obj = peek(key)
return false if obj == @sentinel
true
end
end
def peek(key)
synchronize do
return @curr.fetch(key, @renew.fetch(key, @gc.fetch(key, @sentinel)))
end
end
private
def alternate
synchronize do
@gc = @curr # GCed
@curr = @renew
@renew = {}
end
end
def keeper
Thread.new do
loop do
size = alternate
sleep(@timeout)
end
end
end
end
def initialize(timeout=600)
@holder = TimerHolder2.new(timeout)
end
def to_obj(ref)
return super if ref.nil?
@holder.fetch(ref)
rescue TimerHolder2::InvalidIndexError
raise "invalid reference"
end
def to_id(obj)
return @holder.add(obj)
end
end
end
# DRb.install_id_conv(TimerIdConv.new)
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