Loosely coupled compound computer system using lock and semaphore mechanism for performing exclusive control of shared resource which is accessed through a distinct bus

摘要: Exclusive control using a semaphore mechanism of specific computer is executed, and P V operation instructions for the are issued according to use request end information shared resource from another or computer. Whether not enabling informed source determined value variable. For this reason, even when enabled, merely sent back as computer, lock server can be prevented being set in an execution waiting state unsuccessful instruction.