Class: Rbgo::Once

Inherits:
Object
  • Object
show all
Defined in:
lib/rbgo/once.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Once

Returns a new instance of Once.



6
7
8
9
 
# File 'lib/rbgo/once.rb', line 6

def initialize
  self.mutex       = Mutex.new
  self.called_flag = false
end

Instance Method Details

#do(&f) ⇒ Object 



11
12
13
14
15
16
17
18
19
20
21
22
 
# File 'lib/rbgo/once.rb', line 11

def do(&f)
  return nil if called_flag
  mutex.synchronize do
    unless called_flag
      begin
        f.call
      ensure
        self.called_flag = true
      end
    end
  end
end