Register a shutdown procedure.
typedef void (Ns_Callback) (void *context); Ns_ProcHandle Ns_RegisterShutdown( Ns_Callback *proc, void *context );
The Ns_RegisterShutdown function registers proc
as a shutdown procedure. The server calls all shutdown procedures before shutting down, in last-registered first-run order. The shutdown procedure takes the context as its sole argument. A shutdown procedure is often used to close or free a resource allocated by a module's initialization routine.