Event notifying method, event notifying device and processor system permitting inconsistent state of a counter managing number of non-notified events

摘要

An event notifying method notifies one or a plurality of events from a device to a processor by queuing to a queue in a processor system having one or a plurality of processors. A number of non-notified events existing in the queue is managed by a counter unit, and an inconsistent state of the counter unit caused by differences in updating timings of the counter unit from the device and the processor is temporarily permitted.