/**
* @return filter_manager the singleton instance.
*/
public static function instance()
{
global $CFG;
if (is_null(self::$singletoninstance)) {
if (!empty($CFG->perfdebug)) {
self::$singletoninstance = new performance_measuring_filter_manager();
} else {
self::$singletoninstance = new self();
}
}
return self::$singletoninstance;
}
/**
* Resets the caches, usually to be called between unit tests
*/
public static function reset_caches()
{
if (self::$singletoninstance) {
self::$singletoninstance->unload_all_filters();
}
self::$singletoninstance = null;
}