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 #ifndef _LINUX_KLIST_H
  13 #define _LINUX_KLIST_H
  14
  15 #include <linux/spinlock.h>
  16 #include <linux/completion.h>
  17 #include <linux/kref.h>
  18 #include <linux/list.h>
  19
  20
  21 struct klist {
  22         spinlock_t              k_lock;
  23         struct list_head        k_list;
  24 };
  25
  26
  27 extern void klist_init(struct klist * k);
  28
  29
  30 struct klist_node {
  31         struct klist            * n_klist;
  32         struct list_head        n_node;
  33         struct kref             n_ref;
  34         struct completion       n_removed;
  35 };
  36
  37 extern void klist_add_tail(struct klist_node * n, struct klist * k);
  38 extern void klist_add_head(struct klist_node * n, struct klist * k);
  39
  40 extern void klist_del(struct klist_node * n);
  41 extern void klist_remove(struct klist_node * n);
  42
  43 extern int klist_node_attached(struct klist_node * n);
  44
  45
  46 struct klist_iter {
  47         struct klist            * i_klist;
  48         struct list_head        * i_head;
  49         struct klist_node       * i_cur;
  50 };
  51
  52
  53 extern void klist_iter_init(struct klist * k, struct klist_iter * i);
  54 extern void klist_iter_init_node(struct klist * k, struct klist_iter * i,
  55                                  struct klist_node * n);
  56 extern void klist_iter_exit(struct klist_iter * i);
  57 extern struct klist_node * klist_next(struct klist_iter * i);
  58
  59 #endif