(PECL ev >= 0.2.0)
EvWatcher::stop — Stops the watcher
Marks the watcher as inactive. Note that only active watchers will receive events.
锟剿猴拷锟斤拷没锟叫诧拷锟斤拷锟斤拷
没锟叫凤拷锟斤拷值锟斤拷