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Callbacks are not always supported [Table of Contents] When a callback event occurs

Open Client Client-Library/C Reference Manual

[-] Chapter 2 Topics
[-] Callbacks
[-] Installing a callback routine

Installing a callback routine

Applications must be coded to install any needed runtime callbacks. An application installs a callback routine by calling ct_callback, passing a pointer to the callback routine, and indicating its type via the type parameter.

A callback of a particular type can be installed at the context or connection level. When a connection is allocated, it picks up default callbacks from its parent context. An application overrides these default callbacks by calling ct_callback to install new callbacks at the connection level.

Callbacks are not always supported [Table of Contents] When a callback event occurs