Overview of the CLIST Attention Facility

If a program processes a CLIST with a CLIST attention routine, and an attention interruption occurs, the program's attention routine can process the CLIST's attention routine through the CLIST attention facility.

When an attention interruption occurs while a CLIST with an attention routine is processing, the attention routine established with the CLSTATTN operand receives control. The routine can then invoke the CLIST attention facility to process the CLIST's attention routine.

Note: If the program does not establish an attention routine with the CLSTATTN operand, control passes to the next highest-level attention routine established with the CLSTATTN operand coded on the STAX macro.

Figure 1 shows the flow of control between a program and the CLIST attention facility.

Figure 1. Flow of Control Between a Caller and the CLIST Attention Facility
Parent topic: Using the CLIST attention facility