Dynamic exits and RNL processing

Prior to RNL processing, your system can implement the ISGNQXIT or the ISGNQXITFAST installation exits. These exit routines will affect the way ISGENQ, ENQ, DEQ, and RESERVE requests are handled. The following attributes can be altered (note that for certain types of requests, the exits can change the return/reason code):

QName
RName
Scope
Device UCB address
Convert Reserve
Bypass RNLs.

For more details on possible resource alteration that are provided by ISGNQXIT or ISGNQXITFAST, see ISGYNQXP mapping macro in z/OS MVS™ Data Areas in z/OS® Internet Library at z/OS Internet Library.

The exit routines cannot alter the parameter list for the original request. To avoid potential integrity problems, ensure that the original DEQ parameters match the original ENQ parameters.

See z/OS MVS Installation Exits for complete information about:

ISGNQXIT — ENQ/DEQ Installation Exit
ISGNQXITFAST — Fast ENQ/DEQ Installation Exit