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/*

 *      klist.h - Some generic list helpers, extending struct list_head a bit.

 *

 *      Implementations are found in lib/klist.c

 *

 *

 *      Copyright (C) 2005 Patrick Mochel

 *

 *      This file is rleased under the GPL v2.

 */

#ifndef _LINUX_KLIST_H

#define _LINUX_KLIST_H

#include <linux/spinlock.h>

#include <linux/completion.h>

#include <linux/kref.h>

#include <linux/list.h>

struct klist_node;

struct klist {

        spinlock_t              k_lock;

        struct list_head        k_list;

        void                    (*get)(struct klist_node *);

        void                    (*put)(struct klist_node *);

};

extern void klist_init(struct klist * k, void (*get)(struct klist_node *),

                       void (*put)(struct klist_node *));

struct klist_node {

        struct klist            * n_klist;

        struct list_head        n_node;

        struct kref             n_ref;

        struct completion       n_removed;

};

extern void klist_add_tail(struct klist_node * n, struct klist * k);

extern void klist_add_head(struct klist_node * n, struct klist * k);

extern void klist_del(struct klist_node * n);

extern void klist_remove(struct klist_node * n);

extern int klist_node_attached(struct klist_node * n);

struct klist_iter {

        struct klist            * i_klist;

        struct list_head        * i_head;

        struct klist_node       * i_cur;

};

extern void klist_iter_init(struct klist * k, struct klist_iter * i);

extern void klist_iter_init_node(struct klist * k, struct klist_iter * i,

                                 struct klist_node * n);

extern void klist_iter_exit(struct klist_iter * i);

extern struct klist_node * klist_next(struct klist_iter * i);

#endif