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Appendix G. Threadsafe XPI commands

Most, but not all, XPI commands are threadsafe. Issuing any of the non-threadsafe commands causes CICS® to use the QR TCB to ensure serialization. The XPI commands that are threadsafe are indicated in the command syntax diagrams in The user exit programming interface (XPI) with the statement: "This command is threadsafe", and are listed here.

Threadsafe commands:

Non-threadsafe commands:

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