| Authorization: | Supervisor state key 0 |
| Dispatchable unit mode: | SRB |
| Cross-memory mode: | PASN=HASN=SASN with the current home address space the same
as when the server issued the IWM4CON macro instruction. |
| AMODE: | 31-bit |
| ASC mode: | Primary |
| Interrupt status: | Enabled for I/O and external interrupts |
| Locks: | No locks held |
| Serialization | It is possible for the exit to be called before the caller
has received control back from IWM4CON. The exit or any program it
drives (synchronously or asynchronously) must synchronize with the
program issuing IWM4CON to ensure that IWM4CON has returned a connect
token prior to issuing IWM4DIS (disconnect) or any other service that
requires the connect token. |
| Location | The server exit must be a resident routine callable
from the server address space and must remain available after the
server manager disconnects or after the termination of the server
task which issued the IWM4CON. The exit need not persist after termination
of the server address space.
The input parameter list is in pageable
storage addressable in the primary address space, but should not be
changed by the exit. |
| Exit Recovery | The system may cause the server to become ineligible
to be recommended by IWMSRFSV (find server) if there have been repetitive
errors in calling the exit. The exit may optionally establish a functional
recovery routine (FRR) or ESTAEX for any needed recovery or cleanup
of its resources. |
z/OS MVS Programming: Workload Management Services
Copyright IBM Corporation 1990, 2014