User Exits › Test Compression Facility User Exit

Test Compression Facility User Exit

TCF supports the use of optional user exits at various phases in its processing. These are provided so that each installation can tailor the use of TCF beyond what can be accomplished based on parameter specifications.

Assembler language conventions are followed in passing parameters to the exit modules. Register 1 points to a list of addresses, each of which points to a specific parameter as defined for the exit. In some cases, the exit module returns a half word code through the designated parameter to indicate to TCF what further actions are to be taken.