DATA SENDING/RECEIVING SYSTEM, METHOD OF CONTROLLING RING BUFFER, AND CONTROL PROGRAM

摘要

PROBLEM TO BE SOLVED: To reduce the amount of waiting state for the writing of data onto each of two ring buffers by each of two devices, the ring buffers being allocated to a shared memory between the two devices. SOLUTION: An expansion area is allocated midway between two memory areas allocated to the two ring buffers and a determination is made as to whether or not data equal to or more than vacant size are expected to be written in one of the ring buffers. Based on use of the expansion area, a determination is made as to whether or not it is possible to expand the ring buffer; When the determinations are both affirmative, the ring buffer is expanded. COPYRIGHT: (C)2004,JPO