projects / librseq.git / blame
| Commit | Line | Data |
|---|---|---|
| de28c254 | 1 | /* SPDX-License-Identifier: LGPL-2.1 OR MIT */ |
| b32429a9 MD |
2 | /* |
| 3 | * percpu-op.h | |
| 4 | * | |
| 5 | * (C) Copyright 2017-2018 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
| 6 | */ | |
| 7 | ||
| 8 | #ifndef RSEQ_PERCPU_OP_H | |
| 9 | #define RSEQ_PERCPU_OP_H | |
| 10 | ||
| 11 | #include <stdint.h> | |
| 12 | #include <stdbool.h> | |
| 13 | #include <errno.h> | |
| 14 | #include <stdlib.h> | |
| 15 | #include <rseq/rseq.h> | |
| 16 | #include <rseq/cpu-op.h> | |
| 17 | ||
| 0cfe92f9 MD |
18 | static inline uint32_t percpu_current_cpu(void) |
| 19 | { | |
| 20 | return rseq_current_cpu(); | |
| 21 | } | |
| 22 | ||
| b32429a9 MD |
23 | static inline __attribute__((always_inline)) |
| 24 | int percpu_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, | |
| 25 | int cpu) | |
| 26 | { | |
| 27 | int ret; | |
| 28 | ||
| 29 | ret = rseq_cmpeqv_storev(v, expect, newv, cpu); | |
| 30 | if (rseq_unlikely(ret)) { | |
| 31 | if (ret > 0) | |
| 32 | return ret; | |
| 33 | return cpu_op_cmpeqv_storev(v, expect, newv, cpu); | |
| 34 | } | |
| 35 | return 0; | |
| 36 | } | |
| 37 | ||
| 38 | static inline __attribute__((always_inline)) | |
| 39 | int percpu_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot, | |
| 40 | off_t voffp, intptr_t *load, int cpu) | |
| 41 | { | |
| 42 | int ret; | |
| 43 | ||
| 44 | ret = rseq_cmpnev_storeoffp_load(v, expectnot, voffp, load, cpu); | |
| 45 | if (rseq_unlikely(ret)) { | |
| 46 | if (ret > 0) | |
| 47 | return ret; | |
| 48 | return cpu_op_cmpnev_storeoffp_load(v, expectnot, voffp, | |
| 49 | load, cpu); | |
| 50 | } | |
| 51 | return 0; | |
| 52 | } | |
| 53 | ||
| 54 | static inline __attribute__((always_inline)) | |
| 55 | int percpu_addv(intptr_t *v, intptr_t count, int cpu) | |
| 56 | { | |
| 57 | if (rseq_unlikely(rseq_addv(v, count, cpu))) | |
| 58 | return cpu_op_addv(v, count, cpu); | |
| 59 | return 0; | |
| 60 | } | |
| 61 | ||
| 62 | static inline __attribute__((always_inline)) | |
| 63 | int percpu_cmpeqv_storev_storev(intptr_t *v, intptr_t expect, | |
| 64 | intptr_t *v2, intptr_t newv2, | |
| 65 | intptr_t newv, int cpu) | |
| 66 | { | |
| 67 | int ret; | |
| 68 | ||
| 69 | ret = rseq_cmpeqv_trystorev_storev(v, expect, v2, newv2, | |
| 70 | newv, cpu); | |
| 71 | if (rseq_unlikely(ret)) { | |
| 72 | if (ret > 0) | |
| 73 | return ret; | |
| 74 | return cpu_op_cmpeqv_storev_storev(v, expect, v2, newv2, | |
| 75 | newv, cpu); | |
| 76 | } | |
| 77 | return 0; | |
| 78 | } | |
| 79 | ||
| 80 | static inline __attribute__((always_inline)) | |
| 81 | int percpu_cmpeqv_storev_storev_release(intptr_t *v, intptr_t expect, | |
| 82 | intptr_t *v2, intptr_t newv2, | |
| 83 | intptr_t newv, int cpu) | |
| 84 | { | |
| 85 | int ret; | |
| 86 | ||
| 87 | ret = rseq_cmpeqv_trystorev_storev_release(v, expect, v2, newv2, | |
| 88 | newv, cpu); | |
| 89 | if (rseq_unlikely(ret)) { | |
| 90 | if (ret > 0) | |
| 91 | return ret; | |
| d15728d5 MD |
92 | return cpu_op_cmpeqv_storev_storev_release(v, expect, v2, newv2, |
| 93 | newv, cpu); | |
| b32429a9 MD |
94 | } |
| 95 | return 0; | |
| 96 | } | |
| 97 | ||
| 98 | static inline __attribute__((always_inline)) | |
| 99 | int percpu_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect, | |
| 100 | intptr_t *v2, intptr_t expect2, | |
| 101 | intptr_t newv, int cpu) | |
| 102 | { | |
| 103 | int ret; | |
| 104 | ||
| 105 | ret = rseq_cmpeqv_cmpeqv_storev(v, expect, v2, expect2, newv, cpu); | |
| 106 | if (rseq_unlikely(ret)) { | |
| 107 | if (ret > 0) | |
| 108 | return ret; | |
| 109 | return cpu_op_cmpeqv_cmpeqv_storev(v, expect, v2, expect2, | |
| 110 | newv, cpu); | |
| 111 | } | |
| 112 | return 0; | |
| 113 | } | |
| 114 | ||
| 115 | static inline __attribute__((always_inline)) | |
| 116 | int percpu_cmpeqv_memcpy_storev(intptr_t *v, intptr_t expect, | |
| 117 | void *dst, void *src, size_t len, | |
| 118 | intptr_t newv, int cpu) | |
| 119 | { | |
| 120 | int ret; | |
| 121 | ||
| 122 | ret = rseq_cmpeqv_trymemcpy_storev(v, expect, dst, src, len, | |
| 123 | newv, cpu); | |
| 124 | if (rseq_unlikely(ret)) { | |
| 125 | if (ret > 0) | |
| 126 | return ret; | |
| 127 | return cpu_op_cmpeqv_memcpy_storev(v, expect, dst, src, len, | |
| 128 | newv, cpu); | |
| 129 | } | |
| 130 | return 0; | |
| 131 | } | |
| 132 | ||
| 133 | static inline __attribute__((always_inline)) | |
| 134 | int percpu_cmpeqv_memcpy_storev_release(intptr_t *v, intptr_t expect, | |
| 135 | void *dst, void *src, size_t len, | |
| 136 | intptr_t newv, int cpu) | |
| 137 | { | |
| 138 | int ret; | |
| 139 | ||
| 140 | ret = rseq_cmpeqv_trymemcpy_storev_release(v, expect, dst, src, len, | |
| 141 | newv, cpu); | |
| 142 | if (rseq_unlikely(ret)) { | |
| 143 | if (ret > 0) | |
| 144 | return ret; | |
| d15728d5 MD |
145 | return cpu_op_cmpeqv_memcpy_storev_release(v, expect, dst, src, |
| 146 | len, newv, cpu); | |
| b32429a9 MD |
147 | } |
| 148 | return 0; | |
| 149 | } | |
| 150 | ||
| de28c254 MD |
151 | static inline __attribute__((always_inline)) |
| 152 | int percpu_deref_loadoffp(intptr_t *p, off_t voffp, intptr_t *load, int cpu) | |
| 153 | { | |
| 154 | int ret; | |
| 155 | ||
| 156 | ret = rseq_deref_loadoffp(p, voffp, load, cpu); | |
| 157 | if (rseq_unlikely(ret)) { | |
| 158 | if (ret > 0) | |
| 159 | return ret; | |
| 160 | return cpu_op_deref_loadoffp(p, voffp, load, cpu); | |
| 161 | } | |
| 162 | return 0; | |
| 163 | } | |
| 164 | ||
| b32429a9 | 165 | #endif /* RSEQ_PERCPU_OP_H_ */ |