| 1 | /* $NetBSD: atomic.h,v 1.13 2015/01/08 22:27:18 riastradh Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 2007, 2008 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to The NetBSD Foundation |
| 8 | * by Jason R. Thorpe. |
| 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 _SYS_ATOMIC_H_ |
| 33 | #define _SYS_ATOMIC_H_ |
| 34 | |
| 35 | #include <sys/types.h> |
| 36 | #if !defined(_KERNEL) && !defined(_STANDALONE) |
| 37 | #include <stdint.h> |
| 38 | #endif |
| 39 | |
| 40 | __BEGIN_DECLS |
| 41 | /* |
| 42 | * Atomic ADD |
| 43 | */ |
| 44 | void atomic_add_32(volatile uint32_t *, int32_t); |
| 45 | void atomic_add_int(volatile unsigned int *, int); |
| 46 | void atomic_add_long(volatile unsigned long *, long); |
| 47 | void atomic_add_ptr(volatile void *, ssize_t); |
| 48 | void atomic_add_64(volatile uint64_t *, int64_t); |
| 49 | |
| 50 | uint32_t atomic_add_32_nv(volatile uint32_t *, int32_t); |
| 51 | unsigned int atomic_add_int_nv(volatile unsigned int *, int); |
| 52 | unsigned long atomic_add_long_nv(volatile unsigned long *, long); |
| 53 | void * atomic_add_ptr_nv(volatile void *, ssize_t); |
| 54 | uint64_t atomic_add_64_nv(volatile uint64_t *, int64_t); |
| 55 | |
| 56 | /* |
| 57 | * Atomic AND |
| 58 | */ |
| 59 | void atomic_and_32(volatile uint32_t *, uint32_t); |
| 60 | void atomic_and_uint(volatile unsigned int *, unsigned int); |
| 61 | void atomic_and_ulong(volatile unsigned long *, unsigned long); |
| 62 | void atomic_and_64(volatile uint64_t *, uint64_t); |
| 63 | |
| 64 | uint32_t atomic_and_32_nv(volatile uint32_t *, uint32_t); |
| 65 | unsigned int atomic_and_uint_nv(volatile unsigned int *, unsigned int); |
| 66 | unsigned long atomic_and_ulong_nv(volatile unsigned long *, unsigned long); |
| 67 | uint64_t atomic_and_64_nv(volatile uint64_t *, uint64_t); |
| 68 | |
| 69 | /* |
| 70 | * Atomic OR |
| 71 | */ |
| 72 | void atomic_or_32(volatile uint32_t *, uint32_t); |
| 73 | void atomic_or_uint(volatile unsigned int *, unsigned int); |
| 74 | void atomic_or_ulong(volatile unsigned long *, unsigned long); |
| 75 | void atomic_or_64(volatile uint64_t *, uint64_t); |
| 76 | |
| 77 | uint32_t atomic_or_32_nv(volatile uint32_t *, uint32_t); |
| 78 | unsigned int atomic_or_uint_nv(volatile unsigned int *, unsigned int); |
| 79 | unsigned long atomic_or_ulong_nv(volatile unsigned long *, unsigned long); |
| 80 | uint64_t atomic_or_64_nv(volatile uint64_t *, uint64_t); |
| 81 | |
| 82 | /* |
| 83 | * Atomic COMPARE-AND-SWAP |
| 84 | */ |
| 85 | uint32_t atomic_cas_32(volatile uint32_t *, uint32_t, uint32_t); |
| 86 | unsigned int atomic_cas_uint(volatile unsigned int *, unsigned int, |
| 87 | unsigned int); |
| 88 | unsigned long atomic_cas_ulong(volatile unsigned long *, unsigned long, |
| 89 | unsigned long); |
| 90 | void * atomic_cas_ptr(volatile void *, void *, void *); |
| 91 | uint64_t atomic_cas_64(volatile uint64_t *, uint64_t, uint64_t); |
| 92 | |
| 93 | /* |
| 94 | * This operations will be provided for userland, but may not be |
| 95 | * implemented efficiently. |
| 96 | */ |
| 97 | uint16_t atomic_cas_16(volatile uint16_t *, uint16_t, uint16_t); |
| 98 | uint8_t atomic_cas_8(volatile uint8_t *, uint8_t, uint8_t); |
| 99 | |
| 100 | /* |
| 101 | * Non-interlocked atomic COMPARE-AND-SWAP. |
| 102 | */ |
| 103 | uint32_t atomic_cas_32_ni(volatile uint32_t *, uint32_t, uint32_t); |
| 104 | unsigned int atomic_cas_uint_ni(volatile unsigned int *, unsigned int, |
| 105 | unsigned int); |
| 106 | unsigned long atomic_cas_ulong_ni(volatile unsigned long *, unsigned long, |
| 107 | unsigned long); |
| 108 | void * atomic_cas_ptr_ni(volatile void *, void *, void *); |
| 109 | uint64_t atomic_cas_64_ni(volatile uint64_t *, uint64_t, uint64_t); |
| 110 | |
| 111 | /* |
| 112 | * Atomic SWAP |
| 113 | */ |
| 114 | uint32_t atomic_swap_32(volatile uint32_t *, uint32_t); |
| 115 | unsigned int atomic_swap_uint(volatile unsigned int *, unsigned int); |
| 116 | unsigned long atomic_swap_ulong(volatile unsigned long *, unsigned long); |
| 117 | void * atomic_swap_ptr(volatile void *, void *); |
| 118 | uint64_t atomic_swap_64(volatile uint64_t *, uint64_t); |
| 119 | |
| 120 | /* |
| 121 | * Atomic DECREMENT |
| 122 | */ |
| 123 | void atomic_dec_32(volatile uint32_t *); |
| 124 | void atomic_dec_uint(volatile unsigned int *); |
| 125 | void atomic_dec_ulong(volatile unsigned long *); |
| 126 | void atomic_dec_ptr(volatile void *); |
| 127 | void atomic_dec_64(volatile uint64_t *); |
| 128 | |
| 129 | uint32_t atomic_dec_32_nv(volatile uint32_t *); |
| 130 | unsigned int atomic_dec_uint_nv(volatile unsigned int *); |
| 131 | unsigned long atomic_dec_ulong_nv(volatile unsigned long *); |
| 132 | void * atomic_dec_ptr_nv(volatile void *); |
| 133 | uint64_t atomic_dec_64_nv(volatile uint64_t *); |
| 134 | |
| 135 | /* |
| 136 | * Atomic INCREMENT |
| 137 | */ |
| 138 | void atomic_inc_32(volatile uint32_t *); |
| 139 | void atomic_inc_uint(volatile unsigned int *); |
| 140 | void atomic_inc_ulong(volatile unsigned long *); |
| 141 | void atomic_inc_ptr(volatile void *); |
| 142 | void atomic_inc_64(volatile uint64_t *); |
| 143 | |
| 144 | uint32_t atomic_inc_32_nv(volatile uint32_t *); |
| 145 | unsigned int atomic_inc_uint_nv(volatile unsigned int *); |
| 146 | unsigned long atomic_inc_ulong_nv(volatile unsigned long *); |
| 147 | void * atomic_inc_ptr_nv(volatile void *); |
| 148 | uint64_t atomic_inc_64_nv(volatile uint64_t *); |
| 149 | |
| 150 | /* |
| 151 | * Memory barrier operations |
| 152 | */ |
| 153 | void membar_enter(void); |
| 154 | void membar_exit(void); |
| 155 | void membar_producer(void); |
| 156 | void membar_consumer(void); |
| 157 | void membar_sync(void); |
| 158 | |
| 159 | #ifdef __HAVE_MEMBAR_DATADEP_CONSUMER |
| 160 | void membar_datadep_consumer(void); |
| 161 | #else |
| 162 | #define membar_datadep_consumer() ((void)0) |
| 163 | #endif |
| 164 | |
| 165 | __END_DECLS |
| 166 | |
| 167 | #endif /* ! _SYS_ATOMIC_H_ */ |
| 168 | |