include/linux/klist.h

   1 /*
   2  *      klist.h - Some generic list helpers, extending struct list_head a bit.
   3  *
   4  *      Implementations are found in lib/klist.c
   5  *
   6  *
   7  *      Copyright (C) 2005 Patrick Mochel
   8  *
   9  *      This file is rleased under the GPL v2.
  10  */
  11
  12 #include <linux/spinlock.h>
  13 #include <linux/completion.h>
  14 #include <linux/kref.h>
  15 #include <linux/list.h>
  16
  17
  18 struct klist {
  19         spinlock_t              k_lock;
  20         struct list_head        k_list;
  21 };
  22
  23
  24 extern void klist_init(struct klist * k);
  25
  26
  27 struct klist_node {
  28         struct klist            * n_klist;
  29         struct list_head        n_node;
  30         struct kref             n_ref;
  31         struct completion       n_removed;
  32 };
  33
  34 extern void klist_add_tail(struct klist * k, struct klist_node * n);
  35 extern void klist_add_head(struct klist * k, struct klist_node * n);
  36
  37 extern void klist_del(struct klist_node * n);
  38 extern void klist_remove(struct klist_node * n);
  39
  40 extern int klist_node_attached(struct klist_node * n);
  41
  42
  43 struct klist_iter {
  44         struct klist            * i_klist;
  45         struct list_head        * i_head;
  46         struct klist_node       * i_cur;
  47 };
  48
  49
  50 extern void klist_iter_init(struct klist * k, struct klist_iter * i);
  51 extern void klist_iter_init_node(struct klist * k, struct klist_iter * i,
  52                                  struct klist_node * n);
  53 extern void klist_iter_exit(struct klist_iter * i);
  54 extern struct klist_node * klist_next(struct klist_iter * i);
  55