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      1 /*	$NetBSD: kcondvar.h,v 1.6 2023/07/11 17:03:16 martin Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2009 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Andrew Doran.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _OPENSOLARIS_SYS_KCONDVAR_H_
     33 #define	_OPENSOLARIS_SYS_KCONDVAR_H_
     34 
     35 #include_next <sys/condvar.h>
     36 
     37 #ifdef _KERNEL
     38 
     39 typedef enum {
     40 	CV_DEFAULT,
     41 	CV_DRIVER
     42 } kcv_type_t;
     43 
     44 typedef enum {
     45 	TR_CLOCK_TICK,
     46 } time_res_t;
     47 
     48 #define	cv_init(a, b, c, d)	cv_init(a, #a)
     49 
     50 static inline clock_t
     51 cv_timedwait_hires(kcondvar_t *cvp, struct kmutex *mp, hrtime_t tim, hrtime_t res,
     52     int flag)
     53 {
     54 	extern int hz;
     55 	int ticks = ((uint64_t)tim * hz) / 1000000000;
     56 
     57 	return cv_timedwait(cvp, mp, ticks);
     58 }
     59 
     60 static inline clock_t
     61 cv_reltimedwait(kcondvar_t *cvp, struct kmutex *mp, clock_t delta, time_res_t res)
     62 {
     63 
     64 	cv_wait(cvp, mp);
     65 	return 0;
     66 }
     67 
     68 #else
     69 
     70 extern	clock_t cv_timedwait_hires(kcondvar_t *, struct kmutex *, hrtime_t, hrtime_t,
     71     int);
     72 
     73 #endif	/* _KERNEL */
     74 
     75 #endif	/* _OPENSOLARIS_SYS_KCONDVAR_H_ */
     76