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atomic_utils.h
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1/*
2 * Copyright (C) 2020 Otto-von-Guericke-Universität Magdeburg
3 *
4 * This file is subject to the terms and conditions of the GNU Lesser General
5 * Public License v2.1. See the file LICENSE in the top level directory for more
6 * details.
7 */
8
136#ifndef ATOMIC_UTILS_H
137#define ATOMIC_UTILS_H
138
139#include <stdint.h>
140
141#include "irq.h"
142#include "macros/utils.h"
143#include "sched.h"
144
145#include "atomic_utils_arch.h" /* IWYU pragma: export */
146
147#ifdef __cplusplus
148extern "C" {
149#endif
150
151/* Declarations and documentation: */
152
153#if !defined(HAS_ATOMIC_BIT) || defined(DOXYGEN)
173typedef struct {
174 volatile uint8_t *dest;
175 uint8_t mask;
176} atomic_bit_u8_t;
177
183typedef struct {
184 volatile uint16_t *dest;
185 uint16_t mask;
186} atomic_bit_u16_t;
187
193typedef struct {
194 volatile uint32_t *dest;
195 uint32_t mask;
196} atomic_bit_u32_t;
197
203typedef struct {
204 volatile uint64_t *dest;
205 uint64_t mask;
206} atomic_bit_u64_t;
208#endif /* HAS_ATOMIC_BIT */
209
220static inline uint8_t atomic_load_u8(const volatile uint8_t *var);
227static inline uint16_t atomic_load_u16(const volatile uint16_t *var);
234static inline uint32_t atomic_load_u32(const volatile uint32_t *var);
241static inline uint64_t atomic_load_u64(const volatile uint64_t *var);
242
249static inline uintptr_t atomic_load_uintptr(const volatile uintptr_t *var) {
250 if (sizeof(uintptr_t) == 2) {
251 return atomic_load_u16((const volatile uint16_t *)var);
252 }
253 else if (sizeof(uintptr_t) == 4) {
254 return atomic_load_u32((const volatile uint32_t *)(uintptr_t)var);
255 }
256 else {
257 return atomic_load_u64((const volatile uint64_t *)(uintptr_t)var);
258 }
259}
266static inline void * atomic_load_ptr(void **ptr_addr) {
267 return (void *)atomic_load_uintptr((const volatile uintptr_t *)ptr_addr);
268}
275static inline kernel_pid_t atomic_load_kernel_pid(const volatile kernel_pid_t *var)
276{
277 return atomic_load_u16((const volatile uint16_t *)var);
278}
290static inline void atomic_store_u8(volatile uint8_t *dest, uint8_t val);
296static inline void atomic_store_u16(volatile uint16_t *dest, uint16_t val);
302static inline void atomic_store_u32(volatile uint32_t *dest, uint32_t val);
308static inline void atomic_store_u64(volatile uint64_t *dest, uint64_t val);
309
316static inline void atomic_store_uintptr(volatile uintptr_t *dest, uintptr_t val)
317{
318 if (sizeof(uintptr_t) == 2) {
319 atomic_store_u16((volatile uint16_t *)dest, (uint16_t)val);
320 }
321 else if (sizeof(uintptr_t) == 4) {
322 atomic_store_u32((volatile uint32_t *)(uintptr_t)dest, (uint32_t)val);
323 }
324 else {
325 atomic_store_u64((volatile uint64_t *)(uintptr_t)dest, (uint64_t)val);
326 }
327}
334static inline void atomic_store_ptr(void **dest, const void *val) {
335 atomic_store_uintptr((volatile uintptr_t *)dest, (uintptr_t)val);
336}
343static inline void atomic_store_kernel_pid(volatile kernel_pid_t *dest,
344 kernel_pid_t val)
345{
346 atomic_store_u16((volatile uint16_t *)dest, (uint16_t)val);
347}
360static inline uint8_t atomic_fetch_add_u8(volatile uint8_t *dest,
361 uint8_t summand);
368static inline uint16_t atomic_fetch_add_u16(volatile uint16_t *dest,
369 uint16_t summand);
376static inline uint32_t atomic_fetch_add_u32(volatile uint32_t *dest,
377 uint32_t summand);
384static inline uint64_t atomic_fetch_add_u64(volatile uint64_t *dest,
385 uint64_t summand);
399static inline uint8_t atomic_fetch_sub_u8(volatile uint8_t *dest,
400 uint8_t subtrahend);
408static inline uint16_t atomic_fetch_sub_u16(volatile uint16_t *dest,
409 uint16_t subtrahend);
417static inline uint32_t atomic_fetch_sub_u32(volatile uint32_t *dest,
418 uint32_t subtrahend);
426static inline uint64_t atomic_fetch_sub_u64(volatile uint64_t *dest,
427 uint64_t subtrahend);
441static inline uint8_t atomic_fetch_or_u8(volatile uint8_t *dest, uint8_t val);
449static inline uint16_t atomic_fetch_or_u16(volatile uint16_t *dest,
450 uint16_t val);
458static inline uint32_t atomic_fetch_or_u32(volatile uint32_t *dest,
459 uint32_t val);
467static inline uint64_t atomic_fetch_or_u64(volatile uint64_t *dest,
468 uint64_t val);
482static inline uint8_t atomic_fetch_xor_u8(volatile uint8_t *dest, uint8_t val);
490static inline uint16_t atomic_fetch_xor_u16(volatile uint16_t *dest,
491 uint16_t val);
499static inline uint32_t atomic_fetch_xor_u32(volatile uint32_t *dest,
500 uint32_t val);
508static inline uint64_t atomic_fetch_xor_u64(volatile uint64_t *dest,
509 uint64_t val);
523static inline uint8_t atomic_fetch_and_u8(volatile uint8_t *dest, uint8_t val);
531static inline uint16_t atomic_fetch_and_u16(volatile uint16_t *dest,
532 uint16_t val);
540static inline uint32_t atomic_fetch_and_u32(volatile uint32_t *dest,
541 uint32_t val);
549static inline uint64_t atomic_fetch_and_u64(volatile uint64_t *dest,
550 uint64_t val);
562static inline atomic_bit_u8_t atomic_bit_u8(volatile uint8_t *dest,
563 uint8_t bit);
564
570static inline atomic_bit_u16_t atomic_bit_u16(volatile uint16_t *dest,
571 uint8_t bit);
572
578static inline atomic_bit_u32_t atomic_bit_u32(volatile uint32_t *dest,
579 uint8_t bit);
580
586static inline atomic_bit_u64_t atomic_bit_u64(volatile uint64_t *dest,
587 uint8_t bit);
598static inline void atomic_set_bit_u8(atomic_bit_u8_t bit);
603static inline void atomic_set_bit_u16(atomic_bit_u16_t bit);
608static inline void atomic_set_bit_u32(atomic_bit_u32_t bit);
613static inline void atomic_set_bit_u64(atomic_bit_u64_t bit);
624static inline void atomic_clear_bit_u8(atomic_bit_u8_t bit);
629static inline void atomic_clear_bit_u16(atomic_bit_u16_t bit);
634static inline void atomic_clear_bit_u32(atomic_bit_u32_t bit);
639static inline void atomic_clear_bit_u64(atomic_bit_u64_t bit);
653static inline uint8_t semi_atomic_fetch_add_u8(volatile uint8_t *dest,
654 uint8_t summand);
662static inline uint16_t semi_atomic_fetch_add_u16(volatile uint16_t *dest,
663 uint16_t summand);
671static inline uint32_t semi_atomic_fetch_add_u32(volatile uint32_t *dest,
672 uint32_t summand);
680static inline uint64_t semi_atomic_fetch_add_u64(volatile uint64_t *dest,
681 uint64_t summand);
695static inline uint8_t semi_atomic_fetch_sub_u8(volatile uint8_t *dest,
696 uint8_t subtrahend);
704static inline uint16_t semi_atomic_fetch_sub_u16(volatile uint16_t *dest,
705 uint16_t subtrahend);
713static inline uint32_t semi_atomic_fetch_sub_u32(volatile uint32_t *dest,
714 uint32_t subtrahend);
722static inline uint64_t semi_atomic_fetch_sub_u64(volatile uint64_t *dest,
723 uint64_t subtrahend);
737static inline uint8_t semi_atomic_fetch_or_u8(volatile uint8_t *dest, uint8_t val);
745static inline uint16_t semi_atomic_fetch_or_u16(volatile uint16_t *dest,
746 uint16_t val);
754static inline uint32_t semi_atomic_fetch_or_u32(volatile uint32_t *dest,
755 uint32_t val);
763static inline uint64_t semi_atomic_fetch_or_u64(volatile uint64_t *dest,
764 uint64_t val);
778static inline uint8_t semi_atomic_fetch_xor_u8(volatile uint8_t *dest,
779 uint8_t val);
787static inline uint16_t semi_atomic_fetch_xor_u16(volatile uint16_t *dest,
788 uint16_t val);
796static inline uint32_t semi_atomic_fetch_xor_u32(volatile uint32_t *dest,
797 uint32_t val);
805static inline uint64_t semi_atomic_fetch_xor_u64(volatile uint64_t *dest,
806 uint64_t val);
820static inline uint8_t semi_atomic_fetch_and_u8(volatile uint8_t *dest,
821 uint8_t val);
829static inline uint16_t semi_atomic_fetch_and_u16(volatile uint16_t *dest,
830 uint16_t val);
838static inline uint32_t semi_atomic_fetch_and_u32(volatile uint32_t *dest,
839 uint32_t val);
847static inline uint64_t semi_atomic_fetch_and_u64(volatile uint64_t *dest,
848 uint64_t val);
851/* Fallback implementations of atomic utility functions: */
852
860#define ATOMIC_LOAD_IMPL(name, type) \
861 static inline type CONCAT(atomic_load_, name)(const volatile type *var) \
862 { \
863 unsigned state = irq_disable(); \
864 type result = *var; \
865 irq_restore(state); \
866 return result; \
867 }
868
869#ifndef HAS_ATOMIC_LOAD_U8
870ATOMIC_LOAD_IMPL(u8, uint8_t)
871#endif
872#ifndef HAS_ATOMIC_LOAD_U16
873ATOMIC_LOAD_IMPL(u16, uint16_t)
874#endif
875#ifndef HAS_ATOMIC_LOAD_U32
876ATOMIC_LOAD_IMPL(u32, uint32_t)
877#endif
878#ifndef HAS_ATOMIC_LOAD_U64
879ATOMIC_LOAD_IMPL(u64, uint64_t)
880#endif
881
889#define ATOMIC_STORE_IMPL(name, type) \
890 static inline void CONCAT(atomic_store_, name) \
891 (volatile type *dest, type val) \
892 { \
893 unsigned state = irq_disable(); \
894 *dest = val; \
895 irq_restore(state); \
896 }
897
898#ifndef HAS_ATOMIC_STORE_U8
899ATOMIC_STORE_IMPL(u8, uint8_t)
900#endif
901#ifndef HAS_ATOMIC_STORE_U16
902ATOMIC_STORE_IMPL(u16, uint16_t)
903#endif
904#ifndef HAS_ATOMIC_STORE_U32
905ATOMIC_STORE_IMPL(u32, uint32_t)
906#endif
907#ifndef HAS_ATOMIC_STORE_U64
908ATOMIC_STORE_IMPL(u64, uint64_t)
909#endif
910
920#define ATOMIC_FETCH_OP_IMPL(opname, op, name, type) \
921 static inline type CONCAT4(atomic_fetch_, opname, _, name) \
922 (volatile type *dest, type val) \
923 { \
924 unsigned state = irq_disable(); \
925 const type result = *dest; \
926 *dest = result op val; \
927 irq_restore(state); \
928 return result; \
929 }
930
931#ifndef HAS_ATOMIC_FETCH_ADD_U8
932ATOMIC_FETCH_OP_IMPL(add, +, u8, uint8_t)
933#endif
934#ifndef HAS_ATOMIC_FETCH_ADD_U16
935ATOMIC_FETCH_OP_IMPL(add, +, u16, uint16_t)
936#endif
937#ifndef HAS_ATOMIC_FETCH_ADD_U32
938ATOMIC_FETCH_OP_IMPL(add, +, u32, uint32_t)
939#endif
940#ifndef HAS_ATOMIC_FETCH_ADD_U64
941ATOMIC_FETCH_OP_IMPL(add, +, u64, uint64_t)
942#endif
943
944#ifndef HAS_ATOMIC_FETCH_SUB_U8
945ATOMIC_FETCH_OP_IMPL(sub, -, u8, uint8_t)
946#endif
947#ifndef HAS_ATOMIC_FETCH_SUB_U16
948ATOMIC_FETCH_OP_IMPL(sub, -, u16, uint16_t)
949#endif
950#ifndef HAS_ATOMIC_FETCH_SUB_U32
951ATOMIC_FETCH_OP_IMPL(sub, -, u32, uint32_t)
952#endif
953#ifndef HAS_ATOMIC_FETCH_SUB_U64
954ATOMIC_FETCH_OP_IMPL(sub, -, u64, uint64_t)
955#endif
956
957#ifndef HAS_ATOMIC_FETCH_OR_U8
958ATOMIC_FETCH_OP_IMPL(or, |, u8, uint8_t)
959#endif
960#ifndef HAS_ATOMIC_FETCH_OR_U16
961ATOMIC_FETCH_OP_IMPL(or, |, u16, uint16_t)
962#endif
963#ifndef HAS_ATOMIC_FETCH_OR_U32
964ATOMIC_FETCH_OP_IMPL(or, |, u32, uint32_t)
965#endif
966#ifndef HAS_ATOMIC_FETCH_OR_U64
967ATOMIC_FETCH_OP_IMPL(or, |, u64, uint64_t)
968#endif
969
970#ifndef HAS_ATOMIC_FETCH_XOR_U8
971ATOMIC_FETCH_OP_IMPL(xor, ^, u8, uint8_t)
972#endif
973#ifndef HAS_ATOMIC_FETCH_XOR_U16
974ATOMIC_FETCH_OP_IMPL(xor, ^, u16, uint16_t)
975#endif
976#ifndef HAS_ATOMIC_FETCH_XOR_U32
977ATOMIC_FETCH_OP_IMPL(xor, ^, u32, uint32_t)
978#endif
979#ifndef HAS_ATOMIC_FETCH_XOR_U64
980ATOMIC_FETCH_OP_IMPL(xor, ^, u64, uint64_t)
981#endif
982
983#ifndef HAS_ATOMIC_FETCH_AND_U8
984ATOMIC_FETCH_OP_IMPL(and, &, u8, uint8_t)
985#endif
986#ifndef HAS_ATOMIC_FETCH_AND_U16
987ATOMIC_FETCH_OP_IMPL(and, &, u16, uint16_t)
988#endif
989#ifndef HAS_ATOMIC_FETCH_AND_U32
990ATOMIC_FETCH_OP_IMPL(and, &, u32, uint32_t)
991#endif
992#ifndef HAS_ATOMIC_FETCH_AND_U64
993ATOMIC_FETCH_OP_IMPL(and, &, u64, uint64_t)
994#endif
995
996#ifndef HAS_ATOMIC_BIT
997static inline atomic_bit_u8_t atomic_bit_u8(volatile uint8_t *dest,
998 uint8_t bit)
999{
1000 atomic_bit_u8_t result = { .dest = dest, .mask = 1U << bit };
1001 return result;
1002}
1003static inline atomic_bit_u16_t atomic_bit_u16(volatile uint16_t *dest,
1004 uint8_t bit)
1005{
1006 atomic_bit_u16_t result = { .dest = dest, .mask = 1U << bit };
1007 return result;
1008}
1009static inline atomic_bit_u32_t atomic_bit_u32(volatile uint32_t *dest,
1010 uint8_t bit)
1011{
1012 atomic_bit_u32_t result = { .dest = dest, .mask = 1UL << bit };
1013 return result;
1014}
1015static inline atomic_bit_u64_t atomic_bit_u64(volatile uint64_t *dest,
1016 uint8_t bit)
1017{
1018 atomic_bit_u64_t result = { .dest = dest, .mask = 1ULL << bit };
1019 return result;
1020}
1021static inline void atomic_set_bit_u8(atomic_bit_u8_t bit)
1022{
1023 atomic_fetch_or_u8(bit.dest, bit.mask);
1024}
1025static inline void atomic_set_bit_u16(atomic_bit_u16_t bit)
1026{
1027 atomic_fetch_or_u16(bit.dest, bit.mask);
1028}
1029static inline void atomic_set_bit_u32(atomic_bit_u32_t bit)
1030{
1031 atomic_fetch_or_u32(bit.dest, bit.mask);
1032}
1033static inline void atomic_set_bit_u64(atomic_bit_u64_t bit)
1034{
1035 atomic_fetch_or_u64(bit.dest, bit.mask);
1036}
1037static inline void atomic_clear_bit_u8(atomic_bit_u8_t bit)
1038{
1039 atomic_fetch_and_u8(bit.dest, ~bit.mask);
1040}
1041static inline void atomic_clear_bit_u16(atomic_bit_u16_t bit)
1042{
1043 atomic_fetch_and_u16(bit.dest, ~bit.mask);
1044}
1045static inline void atomic_clear_bit_u32(atomic_bit_u32_t bit)
1046{
1047 atomic_fetch_and_u32(bit.dest, ~bit.mask);
1048}
1049static inline void atomic_clear_bit_u64(atomic_bit_u64_t bit)
1050{
1051 atomic_fetch_and_u64(bit.dest, ~bit.mask);
1052}
1053#endif
1054
1055/* Provide semi_atomic_*() functions on top.
1056 *
1057 * - If atomic_<FOO>() is provided: Use this for semi_atomic_<FOO>() as well
1058 * - Else:
1059 * - If matching `atomic_store_u<BITS>()` is provided: Only make final
1060 * store atomic, as we can avoid touching the IRQ state register that
1061 * way
1062 * - Else: We need to disable and re-enable IRQs anyway, we just use the
1063 * fallback implementation of `atomic_<FOO>()` for `semi_atomic<FOO>()`
1064 * as well
1065 */
1066
1067/* FETCH_ADD */
1068#if defined(HAS_ATOMIC_FETCH_ADD_U8) || !defined(HAS_ATOMIC_STORE_U8)
1069static inline uint8_t semi_atomic_fetch_add_u8(volatile uint8_t *dest,
1070 uint8_t val)
1071{
1072 return atomic_fetch_add_u8(dest, val);
1073}
1074#else
1075static inline uint8_t semi_atomic_fetch_add_u8(volatile uint8_t *dest,
1076 uint8_t val)
1077{
1078 uint8_t result = atomic_load_u8(dest);
1079 atomic_store_u8(dest, result + val);
1080 return result;
1081}
1082#endif /* HAS_ATOMIC_FETCH_ADD_U8 || !HAS_ATOMIC_STORE_U8 */
1083
1084#if defined(HAS_ATOMIC_FETCH_ADD_U16) || !defined(HAS_ATOMIC_STORE_U16)
1085static inline uint16_t semi_atomic_fetch_add_u16(volatile uint16_t *dest,
1086 uint16_t val)
1087{
1088 return atomic_fetch_add_u16(dest, val);
1089}
1090#else
1091static inline uint16_t semi_atomic_fetch_add_u16(volatile uint16_t *dest,
1092 uint16_t val)
1093{
1094 uint16_t result = atomic_load_u16(dest);
1095 atomic_store_u16(dest, result + val);
1096 return result;
1097}
1098#endif /* HAS_ATOMIC_FETCH_ADD_U16 || !HAS_ATOMIC_STORE_U16 */
1099
1100#if defined(HAS_ATOMIC_FETCH_ADD_U32) || !defined(HAS_ATOMIC_STORE_U32)
1101static inline uint32_t semi_atomic_fetch_add_u32(volatile uint32_t *dest,
1102 uint32_t val)
1103{
1104 return atomic_fetch_add_u32(dest, val);
1105}
1106#else
1107static inline uint32_t semi_atomic_fetch_add_u32(volatile uint32_t *dest,
1108 uint32_t val)
1109{
1110 uint32_t result = atomic_load_u32(dest);
1111 atomic_store_u32(dest, result + val);
1112 return result;
1113}
1114#endif /* HAS_ATOMIC_FETCH_ADD_U32 || !HAS_ATOMIC_STORE_U32 */
1115
1116#if defined(HAS_ATOMIC_FETCH_ADD_U64) || !defined(HAS_ATOMIC_STORE_U64)
1117static inline uint64_t semi_atomic_fetch_add_u64(volatile uint64_t *dest,
1118 uint64_t val)
1119{
1120 return atomic_fetch_add_u64(dest, val);
1121}
1122#else
1123static inline uint64_t semi_atomic_fetch_add_u64(volatile uint64_t *dest,
1124 uint64_t val)
1125{
1126 atomic_store_u64(dest, *dest + val);
1127}
1128#endif /* HAS_ATOMIC_FETCH_ADD_U32 || !HAS_ATOMIC_STORE_U32 */
1129
1130/* FETCH_SUB */
1131#if defined(HAS_ATOMIC_FETCH_SUB_U8) || !defined(HAS_ATOMIC_STORE_U8)
1132static inline uint8_t semi_atomic_fetch_sub_u8(volatile uint8_t *dest,
1133 uint8_t val)
1134{
1135 return atomic_fetch_sub_u8(dest, val);
1136}
1137#else
1138static inline uint8_t semi_atomic_fetch_sub_u8(volatile uint8_t *dest,
1139 uint8_t val)
1140{
1141 uint8_t result = atomic_load_u8(dest);
1142 atomic_store_u8(dest, result - val);
1143 return result;
1144}
1145#endif /* HAS_ATOMIC_FETCH_SUB_U8 || !HAS_ATOMIC_STORE_U8 */
1146
1147#if defined(HAS_ATOMIC_FETCH_SUB_U16) || !defined(HAS_ATOMIC_STORE_U16)
1148static inline uint16_t semi_atomic_fetch_sub_u16(volatile uint16_t *dest,
1149 uint16_t val)
1150{
1151 return atomic_fetch_sub_u16(dest, val);
1152}
1153#else
1154static inline uint16_t semi_atomic_fetch_sub_u16(volatile uint16_t *dest,
1155 uint16_t val)
1156{
1157 uint16_t result = atomic_load_u16(dest);
1158 atomic_store_u16(dest, result - val);
1159 return result;
1160}
1161#endif /* HAS_ATOMIC_FETCH_SUB_U16 || !HAS_ATOMIC_STORE_U16 */
1162
1163#if defined(HAS_ATOMIC_FETCH_SUB_U32) || !defined(HAS_ATOMIC_STORE_U32)
1164static inline uint32_t semi_atomic_fetch_sub_u32(volatile uint32_t *dest,
1165 uint32_t val)
1166{
1167 return atomic_fetch_sub_u32(dest, val);
1168}
1169#else
1170static inline uint32_t semi_atomic_fetch_sub_u32(volatile uint32_t *dest,
1171 uint32_t val)
1172{
1173 uint32_t result = atomic_load_u32(dest);
1174 atomic_store_u32(dest, result - val);
1175 return result;
1176}
1177#endif /* HAS_ATOMIC_FETCH_SUB_U32 || !HAS_ATOMIC_STORE_U64 */
1178
1179#if defined(HAS_ATOMIC_FETCH_SUB_U64) || !defined(HAS_ATOMIC_STORE_U64)
1180static inline uint64_t semi_atomic_fetch_sub_u64(volatile uint64_t *dest,
1181 uint64_t val)
1182{
1183 return atomic_fetch_sub_u64(dest, val);
1184}
1185#else
1186static inline uint64_t semi_atomic_fetch_sub_u64(volatile uint64_t *dest,
1187 uint64_t val)
1188{
1189 uint64_t result = atomic_load_u64(dest);
1190 atomic_store_u64(dest, result - val);
1191 return result;
1192}
1193#endif /* HAS_ATOMIC_FETCH_SUB_U64 || !HAS_ATOMIC_STORE_U64 */
1194
1195/* FETCH_OR */
1196#if defined(HAS_ATOMIC_FETCH_OR_U8) || !defined(HAS_ATOMIC_STORE_U8)
1197static inline uint8_t semi_atomic_fetch_or_u8(volatile uint8_t *dest,
1198 uint8_t val)
1199{
1200 return atomic_fetch_or_u8(dest, val);
1201}
1202#else
1203static inline uint8_t semi_atomic_fetch_or_u8(volatile uint8_t *dest,
1204 uint8_t val)
1205{
1206 uint8_t result = atomic_load_u8(dest);
1207 atomic_store_u8(dest, result | val);
1208 return result;
1209}
1210#endif /* HAS_ATOMIC_FETCH_OR_U8 || !HAS_ATOMIC_STORE_U8 */
1211
1212#if defined(HAS_ATOMIC_FETCH_OR_U16) || !defined(HAS_ATOMIC_STORE_U16)
1213static inline uint16_t semi_atomic_fetch_or_u16(volatile uint16_t *dest,
1214 uint16_t val)
1215{
1216 return atomic_fetch_or_u16(dest, val);
1217}
1218#else
1219static inline uint16_t semi_atomic_fetch_or_u16(volatile uint16_t *dest,
1220 uint16_t val)
1221{
1222 uint16_t result = atomic_load_u16(dest);
1223 atomic_store_u16(dest, result | val);
1224 return result;
1225}
1226#endif /* HAS_ATOMIC_FETCH_OR_U16 || !HAS_ATOMIC_STORE_U16 */
1227
1228#if defined(HAS_ATOMIC_FETCH_OR_U32) || !defined(HAS_ATOMIC_STORE_U32)
1229static inline uint32_t semi_atomic_fetch_or_u32(volatile uint32_t *dest,
1230 uint32_t val)
1231{
1232 return atomic_fetch_or_u32(dest, val);
1233}
1234#else
1235static inline uint32_t semi_atomic_fetch_or_u32(volatile uint32_t *dest,
1236 uint32_t val)
1237{
1238 uint32_t result = atomic_load_u32(dest);
1239 atomic_store_u32(dest, result | val);
1240 return result;
1241}
1242#endif /* HAS_ATOMIC_FETCH_OR_U32 || !HAS_ATOMIC_STORE_U32 */
1243
1244#if defined(HAS_ATOMIC_FETCH_OR_U64) || !defined(HAS_ATOMIC_STORE_U64)
1245static inline uint64_t semi_atomic_fetch_or_u64(volatile uint64_t *dest,
1246 uint64_t val)
1247{
1248 return atomic_fetch_or_u64(dest, val);
1249}
1250#else
1251static inline uint64_t semi_atomic_fetch_or_u64(volatile uint64_t *dest,
1252 uint64_t val)
1253{
1254 uint64_t result = atomic_load_u64(dest);
1255 atomic_store_u64(dest, result | val);
1256 return result;
1257}
1258#endif /* HAS_ATOMIC_FETCH_OR_U64 || !HAS_ATOMIC_STORE_U64 */
1259
1260/* FETCH_XOR */
1261#if defined(HAS_ATOMIC_FETCH_XOR_U8) || !defined(HAS_ATOMIC_STORE_U8)
1262static inline uint8_t semi_atomic_fetch_xor_u8(volatile uint8_t *dest,
1263 uint8_t val)
1264{
1265 return atomic_fetch_xor_u8(dest, val);
1266}
1267#else
1268static inline uint8_t semi_atomic_fetch_xor_u8(volatile uint8_t *dest,
1269 uint8_t val)
1270{
1271 uint8_t result = atomic_load_u8(dest);
1272 atomic_store_u8(dest, result ^ val);
1273 return result;
1274}
1275#endif /* HAS_ATOMIC_FETCH_XOR_U8 || !HAS_ATOMIC_STORE_U8 */
1276
1277#if defined(HAS_ATOMIC_FETCH_XOR_U16) || !defined(HAS_ATOMIC_STORE_U16)
1278static inline uint16_t semi_atomic_fetch_xor_u16(volatile uint16_t *dest,
1279 uint16_t val)
1280{
1281 return atomic_fetch_xor_u16(dest, val);
1282}
1283#else
1284static inline uint16_t semi_atomic_fetch_xor_u16(volatile uint16_t *dest,
1285 uint16_t val)
1286{
1287 uint16_t result = atomic_load_u16(dest);
1288 atomic_store_u16(dest, result ^ val);
1289 return result;
1290}
1291#endif /* HAS_ATOMIC_FETCH_XOR_U16 || !HAS_ATOMIC_STORE_U16 */
1292
1293#if defined(HAS_ATOMIC_FETCH_XOR_U32) || !defined(HAS_ATOMIC_STORE_U32)
1294static inline uint32_t semi_atomic_fetch_xor_u32(volatile uint32_t *dest,
1295 uint32_t val)
1296{
1297 return atomic_fetch_xor_u32(dest, val);
1298}
1299#else
1300static inline uint32_t semi_atomic_fetch_xor_u32(volatile uint32_t *dest,
1301 uint32_t val)
1302{
1303 uint32_t result = atomic_load_u32(dest);
1304 atomic_store_u32(dest, result ^ val);
1305 return result;
1306}
1307#endif /* HAS_ATOMIC_FETCH_XOR_U32 || !HAS_ATOMIC_STORE_U32 */
1308
1309#if defined(HAS_ATOMIC_FETCH_XOR_U64) || !defined(HAS_ATOMIC_STORE_U64)
1310static inline uint64_t semi_atomic_fetch_xor_u64(volatile uint64_t *dest,
1311 uint64_t val)
1312{
1313 return atomic_fetch_xor_u64(dest, val);
1314}
1315#else
1316static inline uint64_t semi_atomic_fetch_xor_u64(volatile uint64_t *dest,
1317 uint64_t val)
1318{
1319 uint64_t result = atomic_load_u64(dest);
1320 atomic_store_u64(dest, result ^ val);
1321 return result;
1322}
1323#endif /* HAS_ATOMIC_FETCH_XOR_U64 || !HAS_ATOMIC_STORE_U64 */
1324
1325/* FETCH_AND */
1326#if defined(HAS_ATOMIC_FETCH_AND_U8) || !defined(HAS_ATOMIC_STORE_U8)
1327static inline uint8_t semi_atomic_fetch_and_u8(volatile uint8_t *dest,
1328 uint8_t val)
1329{
1330 return atomic_fetch_and_u8(dest, val);
1331}
1332#else
1333static inline uint8_t semi_atomic_fetch_and_u8(volatile uint8_t *dest,
1334 uint8_t val)
1335{
1336 uint8_t result = atomic_load_u8(dest);
1337 atomic_store_u8(dest, result & val);
1338 return result;
1339}
1340#endif /* HAS_ATOMIC_FETCH_AND_U8 || !HAS_ATOMIC_STORE_U8 */
1341
1342#if defined(HAS_ATOMIC_FETCH_AND_U16) || !defined(HAS_ATOMIC_STORE_U16)
1343static inline uint16_t semi_atomic_fetch_and_u16(volatile uint16_t *dest,
1344 uint16_t val)
1345{
1346 return atomic_fetch_and_u16(dest, val);
1347}
1348#else
1349static inline uint16_t semi_atomic_fetch_and_u16(volatile uint16_t *dest,
1350 uint16_t val)
1351{
1352 uint16_t result = atomic_load_u16(dest);
1353 atomic_store_u16(dest, result & val);
1354 return result;
1355}
1356#endif /* HAS_ATOMIC_FETCH_AND_U16 || !HAS_ATOMIC_STORE_U16 */
1357
1358#if defined(HAS_ATOMIC_FETCH_AND_U32) || !defined(HAS_ATOMIC_STORE_U32)
1359static inline uint32_t semi_atomic_fetch_and_u32(volatile uint32_t *dest,
1360 uint32_t val)
1361{
1362 return atomic_fetch_and_u32(dest, val);
1363}
1364#else
1365static inline uint32_t semi_atomic_fetch_and_u32(volatile uint32_t *dest,
1366 uint32_t val)
1367{
1368 uint32_t result = atomic_load_u32(dest);
1369 atomic_store_u32(dest, result & val);
1370 return result;
1371}
1372#endif /* HAS_ATOMIC_FETCH_AND_U32 || !HAS_ATOMIC_STORE_U32 */
1373
1374#if defined(HAS_ATOMIC_FETCH_AND_U64) || !defined(HAS_ATOMIC_STORE_U64)
1375static inline uint64_t semi_atomic_fetch_and_u64(volatile uint64_t *dest,
1376 uint64_t val)
1377{
1378 return atomic_fetch_and_u64(dest, val);
1379}
1380#else
1381static inline uint64_t semi_atomic_fetch_and_u64(volatile uint64_t *dest,
1382 uint64_t val)
1383{
1384 uint64_t result = atomic_load_u64(dest);
1385 atomic_store_u64(dest, result & val);
1386 return result;
1387}
1388#endif /* HAS_ATOMIC_FETCH_AND_U64 || !HAS_ATOMIC_STORE_U64 */
1389
1390#ifdef __cplusplus
1391}
1392#endif
1393
1394#endif /* ATOMIC_UTILS_H */
utils.h
Various helper macros.
kernel_pid_t
int16_t kernel_pid_t
Unique process identifier.
Definition sched.h:139
atomic_store_uintptr
static void atomic_store_uintptr(volatile uintptr_t *dest, uintptr_t val)
Store an uintptr_t atomically.
Definition atomic_utils.h:316
atomic_bit_u32
static atomic_bit_u32_t atomic_bit_u32(volatile uint32_t *dest, uint8_t bit)
Create a reference to a bit in an uint32_t
Definition atomic_utils.h:1009
atomic_fetch_sub_u64
static uint64_t atomic_fetch_sub_u64(volatile uint64_t *dest, uint64_t subtrahend)
Atomically subtract a value from a given value.
atomic_store_u8
static void atomic_store_u8(volatile uint8_t *dest, uint8_t val)
Store an uint8_t atomically.
atomic_fetch_or_u32
static uint32_t atomic_fetch_or_u32(volatile uint32_t *dest, uint32_t val)
Atomic version of *dest |= val
semi_atomic_fetch_and_u32
static uint32_t semi_atomic_fetch_and_u32(volatile uint32_t *dest, uint32_t val)
Semi-atomic version of *dest &= val
Definition atomic_utils.h:1359
atomic_set_bit_u8
static void atomic_set_bit_u8(atomic_bit_u8_t bit)
Atomic version of *dest |= (1 << bit)
Definition atomic_utils.h:1021
ATOMIC_FETCH_OP_IMPL
#define ATOMIC_FETCH_OP_IMPL(opname, op, name, type)
Generates a static inline function implementing atomic_fecth_<op>_u<width>()
Definition atomic_utils.h:920
semi_atomic_fetch_add_u8
static uint8_t semi_atomic_fetch_add_u8(volatile uint8_t *dest, uint8_t summand)
Semi-atomically add a value onto a given value.
Definition atomic_utils.h:1069
atomic_load_ptr
static void * atomic_load_ptr(void **ptr_addr)
Load an void * atomically.
Definition atomic_utils.h:266
atomic_bit_u64
static atomic_bit_u64_t atomic_bit_u64(volatile uint64_t *dest, uint8_t bit)
Create a reference to a bit in an uint64_t
Definition atomic_utils.h:1015
atomic_fetch_xor_u32
static uint32_t atomic_fetch_xor_u32(volatile uint32_t *dest, uint32_t val)
Atomic version of *dest ^= val
ATOMIC_LOAD_IMPL
#define ATOMIC_LOAD_IMPL(name, type)
Generates a static inline function implementing atomic_load_u<width>()
Definition atomic_utils.h:860
atomic_clear_bit_u32
static void atomic_clear_bit_u32(atomic_bit_u32_t bit)
Atomic version of *dest &= ~(1 << bit)
Definition atomic_utils.h:1045
semi_atomic_fetch_xor_u8
static uint8_t semi_atomic_fetch_xor_u8(volatile uint8_t *dest, uint8_t val)
Semi-atomic version of *dest ^= val
Definition atomic_utils.h:1262
atomic_load_u32
static uint32_t atomic_load_u32(const volatile uint32_t *var)
Load an uint32_t atomically.
semi_atomic_fetch_add_u32
static uint32_t semi_atomic_fetch_add_u32(volatile uint32_t *dest, uint32_t summand)
Semi-atomically add a value onto a given value.
Definition atomic_utils.h:1101
atomic_load_kernel_pid
static kernel_pid_t atomic_load_kernel_pid(const volatile kernel_pid_t *var)
Load an kernel_pid_t atomically.
Definition atomic_utils.h:275
atomic_fetch_and_u32
static uint32_t atomic_fetch_and_u32(volatile uint32_t *dest, uint32_t val)
Atomic version of *dest &= val
atomic_fetch_and_u16
static uint16_t atomic_fetch_and_u16(volatile uint16_t *dest, uint16_t val)
Atomic version of *dest &= val
atomic_store_ptr
static void atomic_store_ptr(void **dest, const void *val)
Store an void * atomically.
Definition atomic_utils.h:334
atomic_fetch_xor_u8
static uint8_t atomic_fetch_xor_u8(volatile uint8_t *dest, uint8_t val)
Atomic version of *dest ^= val
atomic_store_u64
static void atomic_store_u64(volatile uint64_t *dest, uint64_t val)
Store an uint64_t atomically.
atomic_load_u16
static uint16_t atomic_load_u16(const volatile uint16_t *var)
Load an uint16_t atomically.
atomic_fetch_and_u64
static uint64_t atomic_fetch_and_u64(volatile uint64_t *dest, uint64_t val)
Atomic version of *dest &= val
atomic_fetch_xor_u16
static uint16_t atomic_fetch_xor_u16(volatile uint16_t *dest, uint16_t val)
Atomic version of *dest ^= val
atomic_fetch_xor_u64
static uint64_t atomic_fetch_xor_u64(volatile uint64_t *dest, uint64_t val)
Atomic version of *dest ^= val
semi_atomic_fetch_or_u64
static uint64_t semi_atomic_fetch_or_u64(volatile uint64_t *dest, uint64_t val)
Semi-atomic version of *dest |= val
Definition atomic_utils.h:1245
semi_atomic_fetch_xor_u64
static uint64_t semi_atomic_fetch_xor_u64(volatile uint64_t *dest, uint64_t val)
Semi-atomic version of *dest ^= val
Definition atomic_utils.h:1310
atomic_set_bit_u64
static void atomic_set_bit_u64(atomic_bit_u64_t bit)
Atomic version of *dest |= (1 << bit)
Definition atomic_utils.h:1033
atomic_clear_bit_u8
static void atomic_clear_bit_u8(atomic_bit_u8_t bit)
Atomic version of *dest &= ~(1 << bit)
Definition atomic_utils.h:1037
semi_atomic_fetch_sub_u16
static uint16_t semi_atomic_fetch_sub_u16(volatile uint16_t *dest, uint16_t subtrahend)
Semi-atomically subtract a value from a given value.
Definition atomic_utils.h:1148
atomic_load_u8
static uint8_t atomic_load_u8(const volatile uint8_t *var)
Load an uint8_t atomically.
atomic_bit_u8
static atomic_bit_u8_t atomic_bit_u8(volatile uint8_t *dest, uint8_t bit)
Create a reference to a bit in an uint8_t
Definition atomic_utils.h:997
semi_atomic_fetch_or_u32
static uint32_t semi_atomic_fetch_or_u32(volatile uint32_t *dest, uint32_t val)
Semi-atomic version of *dest |= val
Definition atomic_utils.h:1229
atomic_fetch_sub_u16
static uint16_t atomic_fetch_sub_u16(volatile uint16_t *dest, uint16_t subtrahend)
Atomically subtract a value from a given value.
atomic_fetch_sub_u8
static uint8_t atomic_fetch_sub_u8(volatile uint8_t *dest, uint8_t subtrahend)
Atomically subtract a value from a given value.
semi_atomic_fetch_sub_u32
static uint32_t semi_atomic_fetch_sub_u32(volatile uint32_t *dest, uint32_t subtrahend)
Semi-atomically subtract a value from a given value.
Definition atomic_utils.h:1164
semi_atomic_fetch_and_u64
static uint64_t semi_atomic_fetch_and_u64(volatile uint64_t *dest, uint64_t val)
Semi-atomic version of *dest &= val
Definition atomic_utils.h:1375
atomic_fetch_add_u8
static uint8_t atomic_fetch_add_u8(volatile uint8_t *dest, uint8_t summand)
Atomically add a value onto a given value.
atomic_clear_bit_u16
static void atomic_clear_bit_u16(atomic_bit_u16_t bit)
Atomic version of *dest &= ~(1 << bit)
Definition atomic_utils.h:1041
semi_atomic_fetch_sub_u64
static uint64_t semi_atomic_fetch_sub_u64(volatile uint64_t *dest, uint64_t subtrahend)
Semi-atomically subtract a value from a given value.
Definition atomic_utils.h:1180
atomic_store_kernel_pid
static void atomic_store_kernel_pid(volatile kernel_pid_t *dest, kernel_pid_t val)
Store an kernel_pid_t atomically.
Definition atomic_utils.h:343
atomic_store_u16
static void atomic_store_u16(volatile uint16_t *dest, uint16_t val)
Store an uint16_t atomically.
atomic_store_u32
static void atomic_store_u32(volatile uint32_t *dest, uint32_t val)
Store an uint32_t atomically.
atomic_load_uintptr
static uintptr_t atomic_load_uintptr(const volatile uintptr_t *var)
Load an uintptr_t atomically.
Definition atomic_utils.h:249
atomic_bit_u16
static atomic_bit_u16_t atomic_bit_u16(volatile uint16_t *dest, uint8_t bit)
Create a reference to a bit in an uint16_t
Definition atomic_utils.h:1003
ATOMIC_STORE_IMPL
#define ATOMIC_STORE_IMPL(name, type)
Generates a static inline function implementing atomic_store_u<width>()
Definition atomic_utils.h:889
semi_atomic_fetch_xor_u32
static uint32_t semi_atomic_fetch_xor_u32(volatile uint32_t *dest, uint32_t val)
Semi-atomic version of *dest ^= val
Definition atomic_utils.h:1294
atomic_fetch_or_u16
static uint16_t atomic_fetch_or_u16(volatile uint16_t *dest, uint16_t val)
Atomic version of *dest |= val
atomic_set_bit_u32
static void atomic_set_bit_u32(atomic_bit_u32_t bit)
Atomic version of *dest |= (1 << bit)
Definition atomic_utils.h:1029
semi_atomic_fetch_and_u16
static uint16_t semi_atomic_fetch_and_u16(volatile uint16_t *dest, uint16_t val)
Semi-atomic version of *dest &= val
Definition atomic_utils.h:1343
atomic_fetch_sub_u32
static uint32_t atomic_fetch_sub_u32(volatile uint32_t *dest, uint32_t subtrahend)
Atomically subtract a value from a given value.
semi_atomic_fetch_add_u16
static uint16_t semi_atomic_fetch_add_u16(volatile uint16_t *dest, uint16_t summand)
Semi-atomically add a value onto a given value.
Definition atomic_utils.h:1085
semi_atomic_fetch_add_u64
static uint64_t semi_atomic_fetch_add_u64(volatile uint64_t *dest, uint64_t summand)
Semi-atomically add a value onto a given value.
Definition atomic_utils.h:1117
atomic_clear_bit_u64
static void atomic_clear_bit_u64(atomic_bit_u64_t bit)
Atomic version of *dest &= ~(1 << bit)
Definition atomic_utils.h:1049
atomic_fetch_add_u64
static uint64_t atomic_fetch_add_u64(volatile uint64_t *dest, uint64_t summand)
Atomically add a value onto a given value.
atomic_fetch_add_u16
static uint16_t atomic_fetch_add_u16(volatile uint16_t *dest, uint16_t summand)
Atomically add a value onto a given value.
semi_atomic_fetch_sub_u8
static uint8_t semi_atomic_fetch_sub_u8(volatile uint8_t *dest, uint8_t subtrahend)
Semi-atomically subtract a value from a given value.
Definition atomic_utils.h:1132
atomic_set_bit_u16
static void atomic_set_bit_u16(atomic_bit_u16_t bit)
Atomic version of *dest |= (1 << bit)
Definition atomic_utils.h:1025
semi_atomic_fetch_or_u16
static uint16_t semi_atomic_fetch_or_u16(volatile uint16_t *dest, uint16_t val)
Semi-atomic version of *dest |= val
Definition atomic_utils.h:1213
semi_atomic_fetch_or_u8
static uint8_t semi_atomic_fetch_or_u8(volatile uint8_t *dest, uint8_t val)
Semi-atomic version of *dest |= val
Definition atomic_utils.h:1197
atomic_fetch_or_u64
static uint64_t atomic_fetch_or_u64(volatile uint64_t *dest, uint64_t val)
Atomic version of *dest |= val
atomic_load_u64
static uint64_t atomic_load_u64(const volatile uint64_t *var)
Load an uint64_t atomically.
atomic_fetch_add_u32
static uint32_t atomic_fetch_add_u32(volatile uint32_t *dest, uint32_t summand)
Atomically add a value onto a given value.
semi_atomic_fetch_xor_u16
static uint16_t semi_atomic_fetch_xor_u16(volatile uint16_t *dest, uint16_t val)
Semi-atomic version of *dest ^= val
Definition atomic_utils.h:1278
atomic_fetch_or_u8
static uint8_t atomic_fetch_or_u8(volatile uint8_t *dest, uint8_t val)
Atomic version of *dest |= val
semi_atomic_fetch_and_u8
static uint8_t semi_atomic_fetch_and_u8(volatile uint8_t *dest, uint8_t val)
Semi-atomic version of *dest &= val
Definition atomic_utils.h:1327
atomic_fetch_and_u8
static uint8_t atomic_fetch_and_u8(volatile uint8_t *dest, uint8_t val)
Atomic version of *dest &= val
irq.h
IRQ driver interface.
sched.h
Scheduler API definition.
atomic_bit_u16_t
Type specifying a bit in an uint16_t
Definition atomic_utils.h:183
atomic_bit_u16_t::mask
uint16_t mask
Bitmask used for setting the bit.
Definition atomic_utils.h:185
atomic_bit_u16_t::dest
volatile uint16_t * dest
Memory containing the bit to set/clear.
Definition atomic_utils.h:184
atomic_bit_u32_t
Type specifying a bit in an uint32_t
Definition atomic_utils.h:193
atomic_bit_u32_t::dest
volatile uint32_t * dest
Memory containing the bit to set/clear.
Definition atomic_utils.h:194
atomic_bit_u32_t::mask
uint32_t mask
Bitmask used for setting the bit.
Definition atomic_utils.h:195
atomic_bit_u64_t
Type specifying a bit in an uint64_t
Definition atomic_utils.h:203
atomic_bit_u64_t::dest
volatile uint64_t * dest
Memory containing the bit to set/clear.
Definition atomic_utils.h:204
atomic_bit_u64_t::mask
uint64_t mask
Bitmask used for setting the bit.
Definition atomic_utils.h:205
atomic_bit_u8_t
Type specifying a bit in an uint8_t
Definition atomic_utils.h:173
atomic_bit_u8_t::mask
uint8_t mask
Bitmask used for setting the bit.
Definition atomic_utils.h:175
atomic_bit_u8_t::dest
volatile uint8_t * dest
Memory containing the bit to set/clear.
Definition atomic_utils.h:174