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(PECL inotify >= 0.1.2)
inotify_queue_len — Return a number upper than zero if there are pending events
$inotify_instance
)This function allows to know if inotify_read() will block or not. If a number upper than zero is returned, there are pending events and inotify_read() will not block.
inotify_instance
inotify_init() 返回的资源
Returns a number upper than zero if there are pending events.