最終更新:2016-07-05 (火) 18:21:24 (2860d)

EventHub
EventHub::getEvents
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/*
 * Wait for events to become available and returns them.
 * After returning, the EventHub holds onto a wake lock until the next call to getEvent.
 * This ensures that the device will not go to sleep while the event is being processed.
 * If the device needs to remain awake longer than that, then the caller is responsible
 * for taking care of it (say, by poking the power manager user activity timer).
 *
 * The timeout is advisory only.  If the device is asleep, it will not wake just to
 * service the timeout.
 *
 * Returns the number of events obtained, or 0 if the timeout expired.
 */