Class: Foobara::WeakObjectSet::GarbageCleaner

Inherits:
Object
  • Object
show all
Defined in:
foobara-0.0.141/projects/weak_object_set/src/weak_object_set.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(weak_object_set, queue) ⇒ GarbageCleaner

Returns a new instance of GarbageCleaner.



10
11
12
13
14
15
 
# File 'foobara-0.0.141/projects/weak_object_set/src/weak_object_set.rb', line 10

def initialize(weak_object_set, queue)
  self.queue = queue
  self.weak_object_set = weak_object_set

  start_cleanup_thread
end

Instance Attribute Details

#cleanup_thread ⇒ Object

Returns the value of attribute cleanup_thread.



8
9
10
 
# File 'foobara-0.0.141/projects/weak_object_set/src/weak_object_set.rb', line 8

def cleanup_thread
  @cleanup_thread
end

#deactivated ⇒ Object

Returns the value of attribute deactivated.



8
9
10
 
# File 'foobara-0.0.141/projects/weak_object_set/src/weak_object_set.rb', line 8

def deactivated
  @deactivated
end

#queue ⇒ Object

Returns the value of attribute queue.



8
9
10
 
# File 'foobara-0.0.141/projects/weak_object_set/src/weak_object_set.rb', line 8

def queue
  @queue
end

#weak_object_set ⇒ Object

Returns the value of attribute weak_object_set.



8
9
10
 
# File 'foobara-0.0.141/projects/weak_object_set/src/weak_object_set.rb', line 8

def weak_object_set
  @weak_object_set
end

Instance Method Details

#cleanup_proc ⇒ Object 



17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
 
# File 'foobara-0.0.141/projects/weak_object_set/src/weak_object_set.rb', line 17

def cleanup_proc
  if deactivated?
    # :nocov:
    raise "GarbageCleaner has been deactivated"
    # :nocov:
  end

  @cleanup_proc ||= begin
    queue = self.queue

    ->(object_id) do
      unless deactivated?
        begin
          queue.push(object_id)
        rescue ClosedQueueError
          # :nocov:
          deactivate
          # :nocov:
        end
      end
    end
  end
end

#deactivate ⇒ Object 



65
66
67
68
69
70
71
72
73
74
75
76
 
# File 'foobara-0.0.141/projects/weak_object_set/src/weak_object_set.rb', line 65

def deactivate
  raise if deactivated?

  self.deactivated = true
  queue.close
  # TODO: don't bother to join here outside of test suite
  cleanup_thread.join # just doing this for test suite/simplecov
  @cleanup_proc = nil
  @queue = nil
  @weak_object_set = nil
  @cleanup_thread = nil
end

#deactivated? ⇒ Boolean

Returns:

  • (Boolean) 


78
79
80
 
# File 'foobara-0.0.141/projects/weak_object_set/src/weak_object_set.rb', line 78

def deactivated?
  deactivated
end

#start_cleanup_thread ⇒ Object 



41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
 
# File 'foobara-0.0.141/projects/weak_object_set/src/weak_object_set.rb', line 41

def start_cleanup_thread
  queue = self.queue

  self.cleanup_thread = Thread.new do
    loop do
      object_id = queue.pop
      if object_id
        weak_object_set.delete(object_id)
      elsif queue.closed?
        self.queue = nil
        break
      else
        # :nocov:
        raise "Unexpected nil value in the queue"
        # :nocov:
      end
    end
  end
end

#track(object) ⇒ Object 



61
62
63
 
# File 'foobara-0.0.141/projects/weak_object_set/src/weak_object_set.rb', line 61

def track(object)
  ObjectSpace.define_finalizer(object, cleanup_proc)
end