System and method for granting or preventing atomic or nonatomic memory access requests to shared memory regions

摘要

A memory access system using a machine instruction architecture having separate machine instructions to instruct a start of the atomic memory access and an end of the atomic memory access, respectively, comprises an atomic memory access memory array for storing a start/end of the atomic memory access, an object memory region indicative of information of an access request and an identifier of a subject of the access request. The system can detect the fact that a memory access request with discrepant identifiers has been newly issued for the object memory region to which the atomic memory access is being effected at present and can immediately initiate a processing routine corresponding thereto. The system may also record a memory access history of the new memory request, whether or not the new memory access has been granted, and can continue or suspend an exclusive memory access request currently being executed.