include/linux/kref.h

   1 /*
   2  * kref.c - 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 #ifdef __KERNEL__
  19
  20 #include <linux/types.h>
  21 #include <asm/atomic.h>
  22
  23 struct kref {
  24         atomic_t refcount;
  25 };
  26
  27 void kref_set(struct kref *kref, int num);
  28 void kref_init(struct kref *kref);
  29 void kref_get(struct kref *kref);
  30 int kref_put(struct kref *kref, void (*release) (struct kref *kref));
  31
  32 #endif /* __KERNEL__ */
  33 #endif /* _KREF_H_ */