(PECL event >= 1.2.6-beta)
EventBase::dispatch — Dispatch pending events
Wait for events to become active, and run their callbacks. The same as EventBase::loop() with no flags set.
     Do
     NOT
     destroy the
     EventBase
     object as long as resources of the associated
     Event
     objects are not released. Otherwise, it will lead to unpredictable
     results!
    
此函数没有参数。
   成功时返回 true, 或者在失败时返回 false。