Module: Singleton

Defined in:
lib/singleton.rb

Defined Under Namespace

Modules: SingletonClassMethods

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.__init__(klass) ⇒ Object 



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# File 'lib/singleton.rb', line 100

def __init__(klass)
  klass.instance_eval {
    @singleton__instance__ = nil
    @singleton__mutex__ = Mutex.new
  }
  def klass.instance
    return @singleton__instance__ if @singleton__instance__
    @singleton__mutex__.synchronize {
      return @singleton__instance__ if @singleton__instance__
      @singleton__instance__ = new()
    }
    @singleton__instance__
  end
  klass
end

Instance Method Details

#_dump(depth = -1)) ⇒ Object

default marshalling strategy



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# File 'lib/singleton.rb', line 75

def _dump(depth = -1)
  ''
end

#clone ⇒ Object

disable build-in copying methods

Raises:

  • (TypeError) 


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# File 'lib/singleton.rb', line 67

def clone
  raise TypeError, "can't clone instance of singleton #{self.class}"
end

#dup ⇒ Object

Raises:

  • (TypeError) 


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# File 'lib/singleton.rb', line 70

def dup
  raise TypeError, "can't dup instance of singleton #{self.class}"
end