LXR linux/tools/perf/util/rblist.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __PERF_RBLIST_H
   3#define __PERF_RBLIST_H
   4
   5#include <linux/rbtree.h>
   6#include <stdbool.h>
   7
   8/*
   9 * create node structs of the form:
  10 * struct my_node {
  11 *     struct rb_node rb_node;
  12 *     ... my data ...
  13 * };
  14 *
  15 * create list structs of the form:
  16 * struct mylist {
  17 *     struct rblist rblist;
  18 *     ... my data ...
  19 * };
  20 */
  21
  22struct rblist {
  23        struct rb_root_cached entries;
  24        unsigned int   nr_entries;
  25
  26        int (*node_cmp)(struct rb_node *rbn, const void *entry);
  27        struct rb_node *(*node_new)(struct rblist *rlist, const void *new_entry);
  28        void (*node_delete)(struct rblist *rblist, struct rb_node *rb_node);
  29};
  30
  31void rblist__init(struct rblist *rblist);
  32void rblist__exit(struct rblist *rblist);
  33void rblist__delete(struct rblist *rblist);
  34int rblist__add_node(struct rblist *rblist, const void *new_entry);
  35void rblist__remove_node(struct rblist *rblist, struct rb_node *rb_node);
  36struct rb_node *rblist__find(struct rblist *rblist, const void *entry);
  37struct rb_node *rblist__findnew(struct rblist *rblist, const void *entry);
  38struct rb_node *rblist__entry(const struct rblist *rblist, unsigned int idx);
  39
  40static inline bool rblist__empty(const struct rblist *rblist)
  41{
  42        return rblist->nr_entries == 0;
  43}
  44
  45static inline unsigned int rblist__nr_entries(const struct rblist *rblist)
  46{
  47        return rblist->nr_entries;
  48}
  49
  50#endif /* __PERF_RBLIST_H */
  51