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drm_wait_netbsd.h revision 1.1.2.1 
      1 /*	$NetBSD: drm_wait_netbsd.h,v 1.1.2.1 2013/07/24 01:49:31 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2013 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Taylor R. Campbell.
      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 _DRM_DRM_WAIT_NETBSD_H_
     33 #define _DRM_DRM_WAIT_NETBSD_H_
     34 
     35 #include <sys/condvar.h>
     36 #include <sys/mutex.h>
     37 #include <sys/systm.h>
     38 
     39 typedef kcondvar_t drm_waitqueue_t;
     40 typedef kmutex_t drm_interlock_t;
     41 
     42 static inline void
     43 DRM_INIT_WAITQUEUE(drm_waitqueue_t *q, const char *name)
     44 {
     45 
     46 	cv_init(q, name);
     47 }
     48 
     49 static inline void
     50 DRM_WAKEUP(drm_waitqueue_t *q, drm_interlock_t *interlock)
     51 {
     52 
     53 	KASSERT(mutex_owned(interlock));
     54 	cv_broadcast(q);
     55 }
     56 
     57 #define	DRM_WAIT_ON(RET, Q, INTERLOCK, TICKS, CONDITION) do		\
     58 {									\
     59 	KASSERT(mutex_owned((INTERLOCK)));				\
     60 	while (!(CONDITION)) {						\
     61 		(RET) = cv_timedwait_sig((Q), (INTERLOCK), (TICKS));	\
     62 		if (RET)						\
     63 			break;						\
     64 	}								\
     65 } while (0)
     66 
     67 #endif  /* _DRM_DRM_WAIT_NETBSD_H_ */
     68