QUEUE STRUCTURE CONTROL SYSTEM FOR CONTROL DATA

摘要

PURPOSE:To recover the control data as much as possible when the control data are partly broken by a fault by connecting again the normal control data which are not connected to a queue to the queue. CONSTITUTION:The identifiers and the pointers of the control data 16 are held opposite to each other in an identifier table 17. If the data 16 are broken in a processing state, the queue structure is first corrected based on the precedent and next pointers. Then the data 16 which are not connected to a queue and have the correct contents are retrieved out of the table 17 and then connected to the queue. Thus the queue structure is recovered. Thus it is possible to specify the abnormal data 16 and to recover the correct data 16 in case of occurrence of a hardware or program fault.