Parameter list for invoking callable services
This section describes the syntax and parameters you need to invoke Language Environment callable
services.
- CEExxxx
- The name of the callable service. By including a reference to a header file in your code, you can avoid declaring each callable service as an external entry. See Header, copy, or include files for these file names.
- parm1 parm2 ... parmn
- Optional or required parameters passed to or returned from the called service. Some callable service parameters are optional in C/C++ and PL/I only. If you do not want to pass the parm or you do not want the return value, you can omit the parm, using the appropriate syntax to indicate that the parm is omitted.
- fc
- A feedback code that indicates the result of the service. fc can
be omitted when you use C/C++, PL/I, and COBOL (COBOL for MVS & VM Release
2 or later).
If you specify fc as an argument, feedback information in the form of a condition token is returned to the calling routine. The condition token indicates whether the service completed successfully or whether a condition was encountered while the service was running. In Language Environment you can decode the condition token so that it can be acted on.
If you omit fc as an argument, using the appropriate syntax to indicate fc is omitted, the condition is signaled if the service was not successful.
Because callable services call other services, these other services might generate feedback codes.