NAME

       qb_map_notify_add - Add a notifier to the map.

SYNOPSIS

       #include <qb/qbmap.h>

       int32_t qb_map_notify_add(
           qb_map_t         *m,          /* the map instance */
           /*
            * the key (or prefix) to attach the notification to.
            */
           const char       *key,
           qb_map_notify_fn  fn,         /* the callback */
           int32_t           events,     /* the type of events to register for. */
           void             *user_data   /* a pointer to be passed into the callback*/
       );

PARAMS

       m         the map instance

       key       the key (or prefix) to attach the notification to.

       fn        the callback

       events    the type of events to register for.

       user_data a pointer to be passed into the callback

DESCRIPTION

RETURN VALUE

       0          success

       -errno     failure

NOTE

       you can use key prefixes with trie maps.

SEE ALSO

       qb_trie_dump(3), qb_map_iter_create(3), qb_skiplist_create(3), qb_map_notify_del(3),
       qb_map_put(3), qb_map_count_get(3), qb_map_foreach(3), qb_map_pref_iter_create(3),
       qb_map_iter_next(3), qb_map_get(3), qb_map_destroy(3), qb_hashtable_create(3),
       qb_map_iter_free(3), qb_trie_create(3), qb_map_notify_del_2(3), qb_map_rm(3)

COPYRIGHT

       Copyright (C) 2010-2020 Red Hat, Inc.