File: classes.rb

package info (click to toggle)
ruby2.5 2.5.5-3%2Bdeb10u4
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 101,532 kB
  • sloc: ruby: 732,598; ansic: 669,262; xml: 25,363; yacc: 20,963; javascript: 6,680; sh: 3,610; lisp: 2,627; makefile: 596; python: 198; sed: 76; perl: 62; awk: 36; asm: 35
file content (24 lines) | stat: -rw-r--r-- 424 bytes parent folder | download | duplicates (3) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
 
require 'weakref'

# From MRI test_weakref.rb
class WeakRefSpec
  def self.make_weakref(level = 10)
    if level > 0
      make_weakref(level - 1)
    else
      WeakRef.new(Object.new)
    end
  end

  def self.make_dead_weakref
    weaks = []
    weak = nil
    10_000.times do
      weaks << make_weakref
      GC.start
      GC.start
      break if weak = weaks.find { |w| !w.weakref_alive? }
    end
    weak
  end
end