INFORMIX-ESQL/C Programmer's Manual Using Informix Libraries

Choosing a Version of the Informix General Libraries

The Informix General Libraries

The esql Command

Linking Static Informix General Libraries

Linking Static Informix General Libraries into an
ESQL/C Module

Linking Shared Informix General Libraries

Symbolic Names of Linked Shared Libraries

Choosing Between Shared and Static Library Versions

Compatibility of Pre-existing ESQL/C Applications with
Current Library Versions

Using the ifx_getversion Utility

Checking the API Version of a Library

Creating Thread-Safe ESQL/C Applications

Characteristics of Thread-Safe ESQL/C Code

Programming a Thread-Safe ESQL/C Application

Concurrent Active Connections

Connections Across Threads

The DISCONNECT ALL Statement

Prepared Statements Across Threads

Cursors Across Threads

Environment Variables Across Threads

Message File Descriptors

Decimal Functions

DCE Restrictions

Linking Thread-Safe Libraries

Linking Thread-Safe Informix General Libraries to an
ESQL/C Module on a UNIX Operating System

Defining Thread-Safe Variables

Linking Shared or Static Versions

Linking Thread-Safe Informix General Libraries to an
ESQL/C Module in a Windows Environment

Using ESQL/C Thread-Safe Decimal Functions

A Sample Thread-Safe Program

Source Listing

Output

Creating a Dynamic Thread Library on UNIX Operating Systems

Data Types

Registering the Dynamic Thread Functions

Setting the $THREADLIB Environment Variable

Creating the Shared Library

Compiling with the -thread and -l Preprocessor Options