Dispatcher domain exits XDSBWT and XDSAWT

The XDSBWT and XDSAWT exit points are located before and after the operating system wait. You cannot use CICS® services in an exit program that is invoked from these exit points.

The XDSBWT and XDSAWT exits can be used to control the swapping state of the CICS address space. However, if the default state of the address space is non-swappable, you cannot use these exits to override this state.

CICS uses a counter that is incremented for every SYSEVENT DONTSWAP request and decremented for every SYSEVENT OKSWAP request down to a minimum of 0. A SYSEVENT DONTSWAP request is issued when this counter goes up from 0 to 1. A SYSEVENT OKSWAP request is issued when this counter goes down from 1 to 0. In all other circumstances, the SYSEVENT is not issued.