1 /*- 2 * Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #ifndef _OPENSOLARIS_SYS_ATOMIC_H_ 30 #define _OPENSOLARIS_SYS_ATOMIC_H_ 31 32 #include <sys/types.h> 33 #include <machine/atomic.h> 34 35 #define casptr(_a, _b, _c) \ 36 atomic_cmpset_ptr((volatile uintptr_t *)(_a), (uintptr_t)(_b), (uintptr_t) (_c)) 37 #define cas32 atomic_cmpset_32 38 39 #if !defined(__LP64__) && !defined(__mips_n32) && !defined(ARM_HAVE_ATOMIC64) 40 extern void atomic_add_64(volatile uint64_t *target, int64_t delta); 41 extern void atomic_dec_64(volatile uint64_t *target); 42 #endif 43 #ifndef __sparc64__ 44 extern uint32_t atomic_cas_32(volatile uint32_t *target, uint32_t cmp, 45 uint32_t newval); 46 extern uint64_t atomic_cas_64(volatile uint64_t *target, uint64_t cmp, 47 uint64_t newval); 48 #endif 49 extern uint64_t atomic_add_64_nv(volatile uint64_t *target, int64_t delta); 50 extern uint8_t atomic_or_8_nv(volatile uint8_t *target, uint8_t value); 51 extern void membar_producer(void); 52 53 #if defined(__sparc64__) || defined(__powerpc__) || defined(__arm__) || \ 54 defined(__mips__) || defined(__aarch64__) || defined(__riscv) 55 extern void atomic_or_8(volatile uint8_t *target, uint8_t value); 56 #else 57 static __inline void 58 atomic_or_8(volatile uint8_t *target, uint8_t value) 59 { 60 atomic_set_8(target, value); 61 } 62 #endif 63 64 static __inline uint32_t 65 atomic_add_32_nv(volatile uint32_t *target, int32_t delta) 66 { 67 return (atomic_fetchadd_32(target, delta) + delta); 68 } 69 70 static __inline u_int 71 atomic_add_int_nv(volatile u_int *target, int delta) 72 { 73 return (atomic_add_32_nv(target, delta)); 74 } 75 76 static __inline void 77 atomic_dec_32(volatile uint32_t *target) 78 { 79 atomic_subtract_32(target, 1); 80 } 81 82 static __inline uint32_t 83 atomic_dec_32_nv(volatile uint32_t *target) 84 { 85 return (atomic_fetchadd_32(target, -1) - 1); 86 } 87 88 #if defined(__LP64__) || defined(__mips_n32) || defined(ARM_HAVE_ATOMIC64) 89 static __inline void 90 atomic_dec_64(volatile uint64_t *target) 91 { 92 atomic_subtract_64(target, 1); 93 } 94 #endif 95 96 static __inline void 97 atomic_inc_32(volatile uint32_t *target) 98 { 99 atomic_add_32(target, 1); 100 } 101 102 static __inline uint32_t 103 atomic_inc_32_nv(volatile uint32_t *target) 104 { 105 return (atomic_add_32_nv(target, 1)); 106 } 107 108 static __inline void 109 atomic_inc_64(volatile uint64_t *target) 110 { 111 atomic_add_64(target, 1); 112 } 113 114 static __inline uint64_t 115 atomic_inc_64_nv(volatile uint64_t *target) 116 { 117 return (atomic_add_64_nv(target, 1)); 118 } 119 120 static __inline uint64_t 121 atomic_dec_64_nv(volatile uint64_t *target) 122 { 123 return (atomic_add_64_nv(target, -1)); 124 } 125 126 #if !defined(COMPAT_32BIT) && defined(__LP64__) 127 static __inline void * 128 atomic_cas_ptr(volatile void *target, void *cmp, void *newval) 129 { 130 return ((void *)atomic_cas_64((volatile uint64_t *)target, 131 (uint64_t)cmp, (uint64_t)newval)); 132 } 133 #else 134 static __inline void * 135 atomic_cas_ptr(volatile void *target, void *cmp, void *newval) 136 { 137 return ((void *)atomic_cas_32((volatile uint32_t *)target, 138 (uint32_t)cmp, (uint32_t)newval)); 139 } 140 #endif /* !defined(COMPAT_32BIT) && defined(__LP64__) */ 141 142 #endif /* !_OPENSOLARIS_SYS_ATOMIC_H_ */ 143