Guardian C Library Calls Reference Manual

Guardian TNS C Library Calls Reference Manual—128833 1-1

ntro

Run-Time Library

C is a relatively small, yet powerful and effective, programming language. With the

extensive run-time library C provides, C becomes an excellent language for a wide

variety of both systems and applications programming projects. For example, you can

use C to write:

•

System utilities

•

Interpreters, compilers, and other program-development tools

•

Servers for SCREEN COBOL and Pathsend requesters

•

Remote Server Call (RSC) requesters

•

Database applications using NonStop SQL/MP

•

Data communication managers, utilities, and applications

Tandem C conforms to the C language standard as set forth in ISO/IEC 9899:1990,

Programming Languages–C. (This is technically identical to ANSI C X3.159-1989,

Programming Language C.) Tandem includes several extensions to ISO standard C that

makes C an effective language for writing applications that run on Tandem NonStop

systems. These extensions include support for fault tolerant process pairs and systems

programming.

C programs compiled by the TNS C compiler and optionally processed by the

Accelerator program use the Guardian TNS C run-time library described in this manual.

Programs compiled with the TNS/R native C compiler use the Guardian TNS/R native C

run-time library. Refer to the Guardian TNS/R Native C Library Calls Reference Manual

for details.

Macros that are not in the library are expanded at preprocessing time.

The Guardian TNS C run-time library consists of the following parts:

The Guardian TNS C run-time library also consists of the model-independent library,

CLIB. CLIB is part of system library. Tandem recommends that you do not bind CLIB

into your programs.

CSMALL The model-dependent version of the C run-time library for the

small-memory model (size of pointer and size of type int are 16 bits).

CLARGE The model-dependent version of the C run-time library for the

large-memory model (size of pointer is 32 bits and size of type int is

16 bits).

CWIDE The model-dependent version of the C run-time library for the

wide-data model (size of pointer and size of type int are 32 bits)

CNONSTOP The C fault tolerant programming functions for use with CLARGE

and CWIDE.