gtpi1m0hSystem Installation Support Reference

Application Timeout Processing

User exit routine UCCAPL provides the ability to perform additional actions or extend the life of an ECB that is about to be timed out.

UCCAPL is called when the ECB that is currently running exited with a 000010 or a 00002010 system error. Exit point APL is located in 2 places in copy segment CTME of CSECT CCNUCL; just prior to issuing the 000010 system error and just prior to issuing the 00002010 system error.

General Conditions at Entry

The registers at entry to UCCAPL are:

R0
Set to 0.

R8
Address of the program's PAT slot.

R9
SVM address of the ECB.

R11-R15
See User Exit Routines - Common Entry Conditions.

System Conditions at Entry

System state
Supervisor

System mask
Masked for I/O and external interrupts

Protect key
0

Address Space
SVM.

Programming Considerations at Entry

Programming Considerations on Return

For all registers except R0, see User Exit Routines - Common Return Conditions.

General Conditions on Return