GENERATE , . . , .
GPSS . , , , , , . SEIZE RELEASE PREEMPT () RETURN (). , PREEMPT, : PREEMPT A,B,C,D,E.
5-1. PREEMPT.
A , ( ). B . , , . . . B PR, , , , . . . C , . E . E RE, . D , .
, , ( ) RETURN, : RETURN A.
5-2. RETURN.
A , , PREEMPT. 5-3 .
GENERATE A,B,,,1 GENERATE A,B,,,2 GENERATE A,B,,,3
SIZE JOB PREEMPT JOB,PR PREEMPT JOB,PR
ADVANCE A,B ADVANCE A,B ADVANCE A,B
REALEASE JOB RETURN JOB RETURN JOB