Patent ID: 7269677

Claim:
An information processing device which specifies a waiting time until execution of a given event and makes a system call, the device comprising: a first timer circuit which is set for a first cycle; a second timer circuit which is set for a second cycle which is shorter than the first cycle; a timeout supervisor which can store the waiting time when the system call is made; and a first cycle supervisor which can store a time until the next interruption request from the first timer circuit when the system call is made, wherein the timeout supervisor stores the waiting time as a result of subtraction of the waiting time stored in the first cycle supervisor from the waiting time stored in the timeout supervisor upon an interruption request from the first timer; and if the waiting time stored in the timeout supervisor is shorter than the first cycle, the second cycle time is subtracted from the waiting time stored in the timeout supervisor upon an interruption request from the second timer circuit.