cat_newdatakey - create a key for session data
#include <cat.h>
int cat_newdatakey(void);
Returns a new key to be used when storing data in a session, using
cat_setsessdata(). Keys are global to the process, and each key should always be used to
store the same kind of data in all sessions. Keys cannot be freed,
reclaimed, or recycled. Keys also should not be dynamically allocated other
than in the initialization phase for any subsystem that requires to
associate data with each session.
cat, cat_setsessdata