Return the instance singleton, creating if necessary
344637
def format_manager(cls):
        
        if cls._instance is None:
            # Discover the formats and register them with a new singleton.
            cls._instance = cls().register_entrypoints()
        return cls._instance
201819
public static function singleton()
    {
        $returnValue = null;

        

		if (core_kernel_persistence_smoothsql_Property::$instance == null){
			core_kernel_persistence_smoothsql_Property::$instance = new core_kernel_persistence_smoothsql_Property();
		}
		$returnValue = core_kernel_persistence_smoothsql_Property::$instance;

        

        return $returnValue;
    }
1161919
public static function GetInstance() {
      if (!isset(self::$_Instance)) {
         $c = __CLASS__;
         self::$_Instance = new $c();
      }
      return self::$_Instance;
   }
521750
public static SystemUtil getInstance() {

    if (instance == null) {
      synchronized (SystemUtilImpl.class) {
        if (instance == null) {
          instance = new SystemUtilImpl();
        }
      }
    }
    return instance;
  }
655136
def new_instance(self, name):
        
        ist = lib.EnvCreateRawInstance(self._env, self._cls, name.encode())
        if ist == ffi.NULL:
            raise CLIPSError(self._env)

        return Instance(self._env, ist)
1026798
def instances(self):
        """"""
        ist = lib.EnvGetNextInstanceInClass(self._env, self._cls, ffi.NULL)

        while ist != ffi.NULL:
            yield Instance(self._env, ist)

            ist = lib.EnvGetNextInstanceInClass(self._env, self._cls, ist)
1227257
function createInstance() {
    var instance = { publish: publish, subscribe: subscribe, close: close };
    instance.__defineGetter__("value", function () { return shared; });
    return instance;
  }
752969
def instantiate(self, cls=None):
        
        if cls is None:
            cls = self.cls
        if cls is None:
            raise TypeError("cls must a class")
        return cls.create(*self.args, **self.kwargs)
496876
def singleton(klass):
    
    instances = {}

    def getinstance(*args, **kwargs):
        if klass not in instances:
            instances[klass] = klass(*args, **kwargs)
        return instances[klass]
    return wraps(klass)(getinstance)
793100
private static ConcurrentPropagationService getInstance() {
    if (instance == null) {
      synchronized (ConcurrentPropagationService.class) {
        if (instance == null) {
          instance = new ConcurrentPropagationService();
        }
      }
    }
    return instance;
  }
1131564
public static ARouter getInstance() {
        if (!hasInit) {
            throw new InitException("ARouter::Init::Invoke init(context) first!");
        } else {
            if (instance == null) {
                synchronized (ARouter.class) {
                    if (instance == null) {
                        instance = new ARouter();
                    }
                }
            }
            return instance;
        }
    }
537910
public static synchronized final SingletonContext getInstance () {
        if ( INSTANCE == null ) {
            try {
                log.debug("Initializing singleton context");
                init(null);
            }
            catch ( CIFSException e ) {
                log.error("Failed to create singleton JCIFS context", e);
            }
        }
        return INSTANCE;
    }
546333
public static function getInstance()
    {
        $self = get_called_class();
        if (!isset(self::$instances[$self])) {
            self::$instances[$self] = new $self;
        }
        return self::$instances[$self];
    }
811004
public static function &getInstance()
    {
        $classname = get_called_class();
        if (!isset(self::$_instances[ $classname ])) {
            self::createInstance($classname, func_get_args());
        }
        $instance = self::$_instances[ $classname ];
        return $instance;
    }
398825
def instances(cls):
        
        l = [i for i in cls.allinstances() if isinstance(i, cls)]
        return l
1030774
def instance(cls, *args, **kwargs):
        
        if cls._instance is None:
            cls._instance = cls(*args, **kwargs)
            loaded = cls._instance.reload()
            logging.getLogger('luigi-interface').info('Loaded %r', loaded)

        return cls._instance
1080576
def get_singleton(self):
        
        only_value = None
        for value in six.itervalues(self.ordered_dict):
            # This loop will raise if it runs more than once.
            if only_value is not None:
                raise ValueError("%r is not a singleton." % self)

            only_value = value

        if only_value is self.__UnsetSentinel or only_value is None:
            raise ValueError("%r is empty." % self)

        return only_value