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/* $OpenBSD: refcnt.h,v 1.4 2016/06/07 07:53:33 mpi Exp $ */
/*
* Copyright (c) 2015 David Gwynne <dlg@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _SYS_REFCNT_H_
#define _SYS_REFCNT_H_
struct refcnt {
unsigned int refs;
};
#define REFCNT_INITIALIZER() { .refs = 1 }
#ifdef _KERNEL
void refcnt_init(struct refcnt *);
void refcnt_take(struct refcnt *);
int refcnt_rele(struct refcnt *);
void refcnt_rele_wake(struct refcnt *);
void refcnt_finalize(struct refcnt *, const char *);
#endif /* _KERNEL */
#endif /* _SYS_REFCNT_H_ */
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