IBM SC34-6814-04 - Manual (Page 201)

UEPRECUR
Address of a halfword recursion counter. Because the XPCERES
exit can never be called recursively in the same transaction, the
value of this field is always 0.
UEPRESP
Address of a 4-byte copy of EIBRESP.
UEPRESP2
Address of a 4-byte copy of EIBRESP2.
UEPTSTOK
Address of a 4-byte token that is valid throughout the life of a task.
See “Using the task token UEPTSTOK” on page 185.
UEPRSRCE
Address of an 8-character copy of the EIB resource value,
EIBRSRCE.
UEP_PC_PBTOK
Address of a 4-byte field containing the z/OS Workload Manager
(WLM) Performance Block Token. An exit program can use this
token to access information (such as the service class token,
SERVCLS) in the WLM Performance Block. To do so, it must use
the WLM EXTRACT macro, IWMMEXTR, passing the Performance
Block Token as the MONTKN input parameter. For more information
about the IWMMEXTR macro, see z/OS MVS Programming:
Workload Management Services.
An exit program must not attempt to modify the Performance Block:
if it does so, the results are unpredictable.
Return codes
UERCNORM
Continue processing.
UERCPURG
Task purged during XPI call.
UERCRESU
A required resource is unavailable. Setting this value causes CICS
to reject the routed request, and to return a value of 'F' (resource
unavailable) in the DYRERROR field of the routing program's
communications area.
XPI calls
All can be used.
Although the exit permits the use of XPI GETMAIN and FREEMAIN calls,
we recommend that you use the EXEC CICS GETMAIN and FREEMAIN
commands instead.
API and SPI calls
All except EXEC CICS SHUTDOWN and EXEC CICS XCTL can be used.
Exit XPCREQC:
When invoked
On completion of a program control link request.
Exit-specific parameters
Chapter 1. Global user exit programs 179