include/linux/kref.h

   1 /*
   2  * kref.h - library routines for handling generic reference counted objects
   3  *
   4  * Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
   5  * Copyright (C) 2004 IBM Corp.
   6  *
   7  * based on kobject.h which was:
   8  * Copyright (C) 2002-2003 Patrick Mochel <mochel@osdl.org>
   9  * Copyright (C) 2002-2003 Open Source Development Labs
  10  *
  11  * This file is released under the GPLv2.
  12  *
  13  */
  14
  15 #ifndef _KREF_H_
  16 #define _KREF_H_
  17
  18 #include <linux/types.h>
  19
  20 struct kref {
  21         atomic_t refcount;
  22 };
  23
  24 void kref_init(struct kref *kref);
  25 void kref_get(struct kref *kref);
  26 int kref_put(struct kref *kref, void (*release) (struct kref *kref));
  27 int kref_sub(struct kref *kref, unsigned int count,
  28              void (*release) (struct kref *kref));
  29
  30 #endif /* _KREF_H_ */