SHARED FILE CONTROL METHOD

PURPOSE:To ensure a highly efficient access to a shared file without increasing the transmission capacity nor the processing capacity of a processor by registering the accesses given from each processor and securing the application of the shared file device among those processors in the order set based on the contents of said registration. CONSTITUTION:In case >=2 allocating requests for shared file are given to one file included in a shared file device 4, these requests are registered in a memory 5 in the form of a queue. At the same time, the allocating order of the shared file is controlled for processors 1a-1c based on the contents of said queue. Thus no undesired allocating request is to the shared file used in common among those processors and therefore the effective accesses are attained to the shared file.