CA Global SubSystem › User-defined Functions and ADDRESS Environments › Coding Requirements › ADDRESS Environment Coding

ADDRESS Environment Coding

When you create an ADDRESS environment, you should consider the following:

• ADDRESS environments cannot preserve data (except in REXX variables) across calls.
• You identify your ADDRESS environment to CA-GSS using the ADDRESS initialization parameter. Under CA‑GSS, all ADDRESS environments execute in subtasks. The first time an IMOD task issues a particular ADDRESS command, a subtask for that environment is created and assigned to the IMOD task for its exclusive use. Repeated ADDRESS commands from the same IMOD task for the same environment reuse the same subtask. When the IMOD task completes, the subtask is retained and reassigned to the next IMOD task that uses the ADDRESS environment.

  You can prevent other IMOD tasks reusing the subtask by specifying DETACH on the ADDRESS initialization parameter. This destroys the subtask when the IMOD task completes.

• An ADDRESS environment subtask executes under the authority of the user ID assigned to the IMOD issuing the ADDRESS command.
• If you access the stack, the stack records are returned to your ADDRESS environment in protected storage. If you want to modify the data, you must make a copy in your own storage area.