TSO/E Support for a REXX Compiler

TSO/E provides a defined interface to support a REXX compiler, such as the IBM® Compiler and Library for REXX/370. The interface is a compiler programming table that identifies the compiler runtime processor and the compiler interface routines. The compiler runtime processor is the program that executes compiled REXX execs.

The compiler programming table contains an entry for each compiler runtime processor and the interface routines that it uses. These routines allow a compiler runtime processor to perform certain tasks related to REXX language processing. The use of the four compiler interface routines is optional. The interface routines are:

Compiler Interface Initialization Routine
If you install this routine, it receives control to initialize a compiler runtime processor before the compiler runtime processor is invoked the first time. The compiler interface initialization routine receives control once for each compiler runtime processor in a REXX language processor environment.
TSO/E Diagnosis: TMP and Service Routines
If you install this routine, it can be used to free resources that the compiler interface initialization routine and the compiler runtime processor might have obtained. The compiler interface termination routine receives control when the language processor environment is terminated.
Compiler Interface Variable Handling Routine
If you install this routine, it accesses variables of a compiled exec. The compiler interface variable handling routine receives control whenever an external routine or host command requests access to REXX variables using IKJCT441 or IRXEXCOM.
Compiler Interface Load Routine
If you install this routine, it loads a compiled REXX exec from storage or frees the in-storage control block. The compiler interface load routine receives control when TSO/E REXX loads a compiled exec into storage and when TSO/E REXX needs to free the in-storage control block of the compiled REXX exec.