MEMORY MANAGEMENT DEVICE, IMAGE PROCESSOR, AND MEMORY MANAGEMENT METHOD

PROBLEM TO BE SOLVED: To improve convenience by efficiently using a memory area usable for a job.SOLUTION: Priority area allocation means U11 of a memory management device respectively allocates a priority area AR1 to be used for a job JB0 on starting to execute each job JB0 to a memory area M1. Use area allocation means U12 of the memory management device first allocates a use area in each processing unit of the job JB0 to the priority area AR1 corresponding to the job JB0 when the execution of the job JB0 is started, and holds the allocation of a use area (AR11) in each processing unit of a first job (JB1) to a common area AR2 in a case where the execution of a second job (JB2) of a relatively high priority is started during executing the first job (JB1) and that the priority area AR1 corresponding to at least the second job (JB2) is not allocated on the precondition that the use area is allocated to the common area AR2 other than the priority area AR1 in the memory area M1 if no area for allocating the use area to the priority area AR1 exists.