Syntax and linkage conventions for latch manager callable services

The latch manager callable services have the following general calling syntax:

CALL routine_name(parameters)

Some specific calling formats for languages that can invoke the latch manager callable services are:

C: routine_name (parm1,parm2,...return_code)
COBOL: CALL “routine_name” USING parm1,parm2,...return_code
FORTRAN: CALL routine_name (parm1,parm2,...return_code)
PL/I: CALL routine_name (parm1,parm2,...return_code)
REXX: ADDRESS LU62 “routine_name parm1 parm2...return_code”

IBM® provides files, called interface definition files (IDFs), that define variables and values for the parameters used with latch manager services. IBM provides IDFs for some of the listed languages. See the serialization topic in z/OS MVS Programming: Authorized Assembler Services Guide for information about the IDFs that are available on MVS™.