71 lines
2.3 KiB
C
71 lines
2.3 KiB
C
/* $NetBSD: mutex.h,v 1.6 2008/04/28 20:23:28 martin Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2002, 2007 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Jason R. Thorpe and 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 _MIPS_MUTEX_H_
|
|
#define _MIPS_MUTEX_H_
|
|
|
|
#ifndef __MUTEX_PRIVATE
|
|
|
|
struct kmutex {
|
|
uintptr_t mtx_pad1;
|
|
uint32_t mtx_pad2[2];
|
|
};
|
|
|
|
#else /* __MUTEX_PRIVATE */
|
|
|
|
#ifdef __MUTEX_PRIVATE
|
|
#include <machine/lock.h>
|
|
#endif
|
|
|
|
struct kmutex {
|
|
volatile uintptr_t mtx_owner;
|
|
ipl_cookie_t mtx_ipl;
|
|
__cpu_simple_lock_t mtx_lock;
|
|
};
|
|
|
|
#define __HAVE_SIMPLE_MUTEXES 1
|
|
#define __HAVE_MUTEX_STUBS 1
|
|
#define __HAVE_SPIN_MUTEX_STUBS 1
|
|
|
|
#define MUTEX_RECEIVE(mtx) membar_enter()
|
|
#define MUTEX_GIVE(mtx) membar_exit()
|
|
|
|
#define MUTEX_CAS(p, o, n) \
|
|
(_atomic_cas_ulong((volatile unsigned long *)(p), (o), (n)) == (o))
|
|
|
|
unsigned long _atomic_cas_ulong(volatile unsigned long *,
|
|
unsigned long, unsigned long);
|
|
|
|
#endif /* __MUTEX_PRIVATE */
|
|
|
|
#endif /* _MIPS_MUTEX_H_ */
|
|
|