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Programming considerations z/OS TSO/E Customization SA32-0976-00 |
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The exits must follow standard linkage conventions. They must save the registers on entry and restore the registers when they return. The exits must be reentrant, refreshable, reusable, and not APF-authorized. The exits can use any of the TSO/E service routines. For a description of the service routines, see . In some cases, you may not need to write a termination exit. This
depends on:
If the initialization exit obtains a system resource, you must write a termination exit to free the resource. For example, the initialization exit may obtain storage to return a new command buffer to the FREE command processor. In this case, you must provide a termination exit to free the storage for the new command buffer. The initialization exit can change FREE operands using the command
buffer. The exit checks the command buffer it receives and determines
whether to change any operands. To change the operands, the exit
must:
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Copyright IBM Corporation 1990, 2014
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