spinlock.h revision 1.1.2.3
1 1.1.2.3 riastrad /* $NetBSD: spinlock.h,v 1.1.2.3 2013/07/24 02:09:58 riastradh Exp $ */ 2 1.1.2.1 riastrad 3 1.1.2.1 riastrad /*- 4 1.1.2.1 riastrad * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 1.1.2.1 riastrad * All rights reserved. 6 1.1.2.1 riastrad * 7 1.1.2.1 riastrad * This code is derived from software contributed to The NetBSD Foundation 8 1.1.2.1 riastrad * by Taylor R. Campbell. 9 1.1.2.1 riastrad * 10 1.1.2.1 riastrad * Redistribution and use in source and binary forms, with or without 11 1.1.2.1 riastrad * modification, are permitted provided that the following conditions 12 1.1.2.1 riastrad * are met: 13 1.1.2.1 riastrad * 1. Redistributions of source code must retain the above copyright 14 1.1.2.1 riastrad * notice, this list of conditions and the following disclaimer. 15 1.1.2.1 riastrad * 2. Redistributions in binary form must reproduce the above copyright 16 1.1.2.1 riastrad * notice, this list of conditions and the following disclaimer in the 17 1.1.2.1 riastrad * documentation and/or other materials provided with the distribution. 18 1.1.2.1 riastrad * 19 1.1.2.1 riastrad * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.1.2.1 riastrad * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.1.2.1 riastrad * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.1.2.1 riastrad * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.1.2.1 riastrad * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.1.2.1 riastrad * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.1.2.1 riastrad * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.1.2.1 riastrad * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.1.2.1 riastrad * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.1.2.1 riastrad * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.1.2.1 riastrad * POSSIBILITY OF SUCH DAMAGE. 30 1.1.2.1 riastrad */ 31 1.1.2.1 riastrad 32 1.1.2.1 riastrad #ifndef _LINUX_SPINLOCK_H_ 33 1.1.2.1 riastrad #define _LINUX_SPINLOCK_H_ 34 1.1.2.1 riastrad 35 1.1.2.2 riastrad #include <sys/cdefs.h> 36 1.1.2.2 riastrad #include <sys/mutex.h> 37 1.1.2.2 riastrad 38 1.1.2.2 riastrad typedef struct { 39 1.1.2.2 riastrad kmutex_t sl_lock; 40 1.1.2.2 riastrad } spinlock_t; 41 1.1.2.2 riastrad 42 1.1.2.2 riastrad static inline void 43 1.1.2.2 riastrad spin_lock(spinlock_t *spinlock) 44 1.1.2.2 riastrad { 45 1.1.2.2 riastrad mutex_enter(&spinlock->sl_lock); 46 1.1.2.2 riastrad } 47 1.1.2.2 riastrad 48 1.1.2.2 riastrad static inline void 49 1.1.2.2 riastrad spin_unlock(spinlock_t *spinlock) 50 1.1.2.2 riastrad { 51 1.1.2.2 riastrad mutex_exit(&spinlock->sl_lock); 52 1.1.2.2 riastrad } 53 1.1.2.2 riastrad 54 1.1.2.2 riastrad /* Must be a macro because the second argument is to be assigned. */ 55 1.1.2.2 riastrad #define spin_lock_irqsave(SPINLOCK, FLAGS) \ 56 1.1.2.2 riastrad do { \ 57 1.1.2.2 riastrad (FLAGS) = 0; \ 58 1.1.2.2 riastrad mutex_enter(&((spinlock_t *)(SPINLOCK))->sl_lock); \ 59 1.1.2.2 riastrad } while (0) 60 1.1.2.2 riastrad 61 1.1.2.2 riastrad static inline void 62 1.1.2.3 riastrad spin_unlock_irqrestore(spinlock_t *spinlock, unsigned long __unused flags) 63 1.1.2.2 riastrad { 64 1.1.2.2 riastrad mutex_exit(&spinlock->sl_lock); 65 1.1.2.2 riastrad } 66 1.1.2.2 riastrad 67 1.1.2.2 riastrad static inline void 68 1.1.2.2 riastrad spin_lock_init(spinlock_t *spinlock) 69 1.1.2.2 riastrad { 70 1.1.2.2 riastrad /* XXX Need to identify which need to block intrs. */ 71 1.1.2.2 riastrad mutex_init(&spinlock->sl_lock, MUTEX_DEFAULT, IPL_NONE); 72 1.1.2.2 riastrad } 73 1.1.2.2 riastrad 74 1.1.2.1 riastrad #endif /* _LINUX_SPINLOCK_H_ */ 75
Indexes created Fri Oct 03 02:09:57 GMT 2025