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Programming C for z/TPF

Overview
This course is designed to give Application Development staff a practical introduction to applying the C Programming language in the z/TPF Environment. It is a practical 5 day course with lectures, interspersed with exercises to consolidate the knowledge gained.

Pre-Requisites
Prior Mainframe Assembler and z/TPF knowledge is required. Students should have attended the 5 day C Programming class or have prior commercial experience of C programming.

Audience
Programmers who are required to program in z/TPF using the C programming language.

Student Numbers
The maximum recommended student to instructor ratio is 12:1

Objectives
On completion of the syllabus students will be able, with the aid of course notes, to:

Access the ECB in an C Environment.
Write C Headers to map existing Dsects.
Interpret C Listings and .mak files.
Use z/TPF API functions in C programs
Interface with existing Assembler programs.
Analyse C dumps to interpret C code and storage areas.


Course Outline

Introduction

Objectives
Terminology
The CSO

The ECB

Overview
What happened to those registers?
Using ecbptr()

The Pre Processor

Using #pragma options
Writing and using macros
Conditional Compilations

Header Files

Standard z/TPF Header Files
Converting a DSect to a Header File
Packing structures
Pitfalls

Listings

Review
The Pseudo Assembler
Optimised Code

Functions

Prolog
Epilog
Efficient storage usage

Assembler Programs

Interface
TPF_regs structure
64 bit vs 31 bit

Existing APIs

Program management
Input/Output
Working storage
File handling
Globals
Error handling
File Pool Management

Program Interfaces

C to C
C to Assembler
Assembler to C
Parameter List

Introduction to Dump Analysis

C/C++ Register Conventions
Module Map
Identifying variables, parameters and Static storage

 

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