LCOM1920-T02G10

/*        $NetBSD: condvar.h,v 1.12 2009/12/05 22:38:19 pooka Exp $        */

/*-

 * Copyright (c) 2006, 2007, 2008 The NetBSD Foundation, Inc.

 * All rights reserved.

 *

 * This code is derived from software contributed to The NetBSD Foundation

 * by Andrew Doran.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS

 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED

 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS

 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGE.

 */

#ifndef _SYS_CONDVAR_H_

#define        _SYS_CONDVAR_H_

#include <sys/mutex.h>

typedef struct kcondvar {

        void                *cv_opaque[3];

} kcondvar_t;

#ifdef _KERNEL

void        cv_init(kcondvar_t *, const char *);

void        cv_destroy(kcondvar_t *);

void        cv_wait(kcondvar_t *, kmutex_t *);

int        cv_wait_sig(kcondvar_t *, kmutex_t *);

int        cv_timedwait(kcondvar_t *, kmutex_t *, int);

int        cv_timedwait_sig(kcondvar_t *, kmutex_t *, int);

void        cv_signal(kcondvar_t *);

void        cv_broadcast(kcondvar_t *);

bool        cv_has_waiters(kcondvar_t *);

bool        cv_is_valid(kcondvar_t *);

/* The "lightning bolt", awoken once per second by the clock interrupt. */

extern kcondvar_t lbolt;

#endif        /* _KERNEL */

#endif /* _SYS_CONDVAR_H_ */