Chau Vo / mbed-dev

mbed library sources. Supersedes mbed-src. RTC working even after reset

Fork of mbed-dev by mbed official

api/critical.h@148:161ebc35dc3a, 2016-09-28 (annotated)

Committer:
olympux
Date:
Wed Sep 28 20:59:47 2016 +0000
Revision:
148:161ebc35dc3a
Parent:
144:ef7eb2e8f9f7 
RTC working

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /*
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2015-2016, ARM Limited, All Rights Reserved
<> 144:ef7eb2e8f9f7 3 * SPDX-License-Identifier: Apache-2.0
<> 144:ef7eb2e8f9f7 4 *
<> 144:ef7eb2e8f9f7 5 * Licensed under the Apache License, Version 2.0 (the "License"); you may
<> 144:ef7eb2e8f9f7 6 * not use this file except in compliance with the License.
<> 144:ef7eb2e8f9f7 7 * You may obtain a copy of the License at
<> 144:ef7eb2e8f9f7 8 *
<> 144:ef7eb2e8f9f7 9 * http://www.apache.org/licenses/LICENSE-2.0
<> 144:ef7eb2e8f9f7 10 *
<> 144:ef7eb2e8f9f7 11 * Unless required by applicable law or agreed to in writing, software
<> 144:ef7eb2e8f9f7 12 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
<> 144:ef7eb2e8f9f7 13 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 144:ef7eb2e8f9f7 14 * See the License for the specific language governing permissions and
<> 144:ef7eb2e8f9f7 15 * limitations under the License.
<> 144:ef7eb2e8f9f7 16 */
<> 144:ef7eb2e8f9f7 17
<> 144:ef7eb2e8f9f7 18 #ifndef __MBED_UTIL_CRITICAL_H__
<> 144:ef7eb2e8f9f7 19 #define __MBED_UTIL_CRITICAL_H__
<> 144:ef7eb2e8f9f7 20
<> 144:ef7eb2e8f9f7 21 #include <stdbool.h>
<> 144:ef7eb2e8f9f7 22 #include <stdint.h>
<> 144:ef7eb2e8f9f7 23 #include <stddef.h>
<> 144:ef7eb2e8f9f7 24
<> 144:ef7eb2e8f9f7 25 #ifdef __cplusplus
<> 144:ef7eb2e8f9f7 26 extern "C" {
<> 144:ef7eb2e8f9f7 27 #endif
<> 144:ef7eb2e8f9f7 28
<> 144:ef7eb2e8f9f7 29
<> 144:ef7eb2e8f9f7 30 /** Determine the current interrupts enabled state
<> 144:ef7eb2e8f9f7 31 *
<> 144:ef7eb2e8f9f7 32 * This function can be called to determine whether or not interrupts are currently enabled.
<> 144:ef7eb2e8f9f7 33 * \note
<> 144:ef7eb2e8f9f7 34 * NOTE:
<> 144:ef7eb2e8f9f7 35 * This function works for both cortex-A and cortex-M, although the underlyng implementation
<> 144:ef7eb2e8f9f7 36 * differs.
<> 144:ef7eb2e8f9f7 37 * @return true if interrupts are enabled, false otherwise
<> 144:ef7eb2e8f9f7 38 */
<> 144:ef7eb2e8f9f7 39 bool core_util_are_interrupts_enabled(void);
<> 144:ef7eb2e8f9f7 40
<> 144:ef7eb2e8f9f7 41 /** Mark the start of a critical section
<> 144:ef7eb2e8f9f7 42 *
<> 144:ef7eb2e8f9f7 43 * This function should be called to mark the start of a critical section of code.
<> 144:ef7eb2e8f9f7 44 * \note
<> 144:ef7eb2e8f9f7 45 * NOTES:
<> 144:ef7eb2e8f9f7 46 * 1) The use of this style of critical section is targetted at C based implementations.
<> 144:ef7eb2e8f9f7 47 * 2) These critical sections can be nested.
<> 144:ef7eb2e8f9f7 48 * 3) The interrupt enable state on entry to the first critical section (of a nested set, or single
<> 144:ef7eb2e8f9f7 49 * section) will be preserved on exit from the section.
<> 144:ef7eb2e8f9f7 50 * 4) This implementation will currently only work on code running in privileged mode.
<> 144:ef7eb2e8f9f7 51 */
<> 144:ef7eb2e8f9f7 52 void core_util_critical_section_enter(void);
<> 144:ef7eb2e8f9f7 53
<> 144:ef7eb2e8f9f7 54 /** Mark the end of a critical section
<> 144:ef7eb2e8f9f7 55 *
<> 144:ef7eb2e8f9f7 56 * This function should be called to mark the end of a critical section of code.
<> 144:ef7eb2e8f9f7 57 * \note
<> 144:ef7eb2e8f9f7 58 * NOTES:
<> 144:ef7eb2e8f9f7 59 * 1) The use of this style of critical section is targetted at C based implementations.
<> 144:ef7eb2e8f9f7 60 * 2) These critical sections can be nested.
<> 144:ef7eb2e8f9f7 61 * 3) The interrupt enable state on entry to the first critical section (of a nested set, or single
<> 144:ef7eb2e8f9f7 62 * section) will be preserved on exit from the section.
<> 144:ef7eb2e8f9f7 63 * 4) This implementation will currently only work on code running in privileged mode.
<> 144:ef7eb2e8f9f7 64 */
<> 144:ef7eb2e8f9f7 65 void core_util_critical_section_exit(void);
<> 144:ef7eb2e8f9f7 66
<> 144:ef7eb2e8f9f7 67 /**
<> 144:ef7eb2e8f9f7 68 * Atomic compare and set. It compares the contents of a memory location to a
<> 144:ef7eb2e8f9f7 69 * given value and, only if they are the same, modifies the contents of that
<> 144:ef7eb2e8f9f7 70 * memory location to a given new value. This is done as a single atomic
<> 144:ef7eb2e8f9f7 71 * operation. The atomicity guarantees that the new value is calculated based on
<> 144:ef7eb2e8f9f7 72 * up-to-date information; if the value had been updated by another thread in
<> 144:ef7eb2e8f9f7 73 * the meantime, the write would fail due to a mismatched expectedCurrentValue.
<> 144:ef7eb2e8f9f7 74 *
<> 144:ef7eb2e8f9f7 75 * Refer to https://en.wikipedia.org/wiki/Compare-and-set [which may redirect
<> 144:ef7eb2e8f9f7 76 * you to the article on compare-and swap].
<> 144:ef7eb2e8f9f7 77 *
<> 144:ef7eb2e8f9f7 78 * @param ptr The target memory location.
<> 144:ef7eb2e8f9f7 79 * @param[in,out] expectedCurrentValue A pointer to some location holding the
<> 144:ef7eb2e8f9f7 80 * expected current value of the data being set atomically.
<> 144:ef7eb2e8f9f7 81 * The computed 'desiredValue' should be a function of this current value.
<> 144:ef7eb2e8f9f7 82 * @Note: This is an in-out parameter. In the
<> 144:ef7eb2e8f9f7 83 * failure case of atomic_cas (where the
<> 144:ef7eb2e8f9f7 84 * destination isn't set), the pointee of expectedCurrentValue is
<> 144:ef7eb2e8f9f7 85 * updated with the current value.
<> 144:ef7eb2e8f9f7 86 * @param[in] desiredValue The new value computed based on '*expectedCurrentValue'.
<> 144:ef7eb2e8f9f7 87 *
<> 144:ef7eb2e8f9f7 88 * @return true if the memory location was atomically
<> 144:ef7eb2e8f9f7 89 * updated with the desired value (after verifying
<> 144:ef7eb2e8f9f7 90 * that it contained the expectedCurrentValue),
<> 144:ef7eb2e8f9f7 91 * false otherwise. In the failure case,
<> 144:ef7eb2e8f9f7 92 * exepctedCurrentValue is updated with the new
<> 144:ef7eb2e8f9f7 93 * value of the target memory location.
<> 144:ef7eb2e8f9f7 94 *
<> 144:ef7eb2e8f9f7 95 * pseudocode:
<> 144:ef7eb2e8f9f7 96 * function cas(p : pointer to int, old : pointer to int, new : int) returns bool {
<> 144:ef7eb2e8f9f7 97 * if *p != *old {
<> 144:ef7eb2e8f9f7 98 * *old = *p
<> 144:ef7eb2e8f9f7 99 * return false
<> 144:ef7eb2e8f9f7 100 * }
<> 144:ef7eb2e8f9f7 101 * *p = new
<> 144:ef7eb2e8f9f7 102 * return true
<> 144:ef7eb2e8f9f7 103 * }
<> 144:ef7eb2e8f9f7 104 *
<> 144:ef7eb2e8f9f7 105 * @Note: In the failure case (where the destination isn't set), the value
<> 144:ef7eb2e8f9f7 106 * pointed to by expectedCurrentValue is still updated with the current value.
<> 144:ef7eb2e8f9f7 107 * This property helps writing concise code for the following incr:
<> 144:ef7eb2e8f9f7 108 *
<> 144:ef7eb2e8f9f7 109 * function incr(p : pointer to int, a : int) returns int {
<> 144:ef7eb2e8f9f7 110 * done = false
<> 144:ef7eb2e8f9f7 111 * value = *p // This fetch operation need not be atomic.
<> 144:ef7eb2e8f9f7 112 * while not done {
<> 144:ef7eb2e8f9f7 113 * done = atomic_cas(p, &value, value + a) // *value gets updated automatically until success
<> 144:ef7eb2e8f9f7 114 * }
<> 144:ef7eb2e8f9f7 115 * return value + a
<> 144:ef7eb2e8f9f7 116 * }
<> 144:ef7eb2e8f9f7 117 */
<> 144:ef7eb2e8f9f7 118 bool core_util_atomic_cas_u8(uint8_t *ptr, uint8_t *expectedCurrentValue, uint8_t desiredValue);
<> 144:ef7eb2e8f9f7 119
<> 144:ef7eb2e8f9f7 120 /**
<> 144:ef7eb2e8f9f7 121 * Atomic compare and set. It compares the contents of a memory location to a
<> 144:ef7eb2e8f9f7 122 * given value and, only if they are the same, modifies the contents of that
<> 144:ef7eb2e8f9f7 123 * memory location to a given new value. This is done as a single atomic
<> 144:ef7eb2e8f9f7 124 * operation. The atomicity guarantees that the new value is calculated based on
<> 144:ef7eb2e8f9f7 125 * up-to-date information; if the value had been updated by another thread in
<> 144:ef7eb2e8f9f7 126 * the meantime, the write would fail due to a mismatched expectedCurrentValue.
<> 144:ef7eb2e8f9f7 127 *
<> 144:ef7eb2e8f9f7 128 * Refer to https://en.wikipedia.org/wiki/Compare-and-set [which may redirect
<> 144:ef7eb2e8f9f7 129 * you to the article on compare-and swap].
<> 144:ef7eb2e8f9f7 130 *
<> 144:ef7eb2e8f9f7 131 * @param ptr The target memory location.
<> 144:ef7eb2e8f9f7 132 * @param[in,out] expectedCurrentValue A pointer to some location holding the
<> 144:ef7eb2e8f9f7 133 * expected current value of the data being set atomically.
<> 144:ef7eb2e8f9f7 134 * The computed 'desiredValue' should be a function of this current value.
<> 144:ef7eb2e8f9f7 135 * @Note: This is an in-out parameter. In the
<> 144:ef7eb2e8f9f7 136 * failure case of atomic_cas (where the
<> 144:ef7eb2e8f9f7 137 * destination isn't set), the pointee of expectedCurrentValue is
<> 144:ef7eb2e8f9f7 138 * updated with the current value.
<> 144:ef7eb2e8f9f7 139 * @param[in] desiredValue The new value computed based on '*expectedCurrentValue'.
<> 144:ef7eb2e8f9f7 140 *
<> 144:ef7eb2e8f9f7 141 * @return true if the memory location was atomically
<> 144:ef7eb2e8f9f7 142 * updated with the desired value (after verifying
<> 144:ef7eb2e8f9f7 143 * that it contained the expectedCurrentValue),
<> 144:ef7eb2e8f9f7 144 * false otherwise. In the failure case,
<> 144:ef7eb2e8f9f7 145 * exepctedCurrentValue is updated with the new
<> 144:ef7eb2e8f9f7 146 * value of the target memory location.
<> 144:ef7eb2e8f9f7 147 *
<> 144:ef7eb2e8f9f7 148 * pseudocode:
<> 144:ef7eb2e8f9f7 149 * function cas(p : pointer to int, old : pointer to int, new : int) returns bool {
<> 144:ef7eb2e8f9f7 150 * if *p != *old {
<> 144:ef7eb2e8f9f7 151 * *old = *p
<> 144:ef7eb2e8f9f7 152 * return false
<> 144:ef7eb2e8f9f7 153 * }
<> 144:ef7eb2e8f9f7 154 * *p = new
<> 144:ef7eb2e8f9f7 155 * return true
<> 144:ef7eb2e8f9f7 156 * }
<> 144:ef7eb2e8f9f7 157 *
<> 144:ef7eb2e8f9f7 158 * @Note: In the failure case (where the destination isn't set), the value
<> 144:ef7eb2e8f9f7 159 * pointed to by expectedCurrentValue is still updated with the current value.
<> 144:ef7eb2e8f9f7 160 * This property helps writing concise code for the following incr:
<> 144:ef7eb2e8f9f7 161 *
<> 144:ef7eb2e8f9f7 162 * function incr(p : pointer to int, a : int) returns int {
<> 144:ef7eb2e8f9f7 163 * done = false
<> 144:ef7eb2e8f9f7 164 * value = *p // This fetch operation need not be atomic.
<> 144:ef7eb2e8f9f7 165 * while not done {
<> 144:ef7eb2e8f9f7 166 * done = atomic_cas(p, &value, value + a) // *value gets updated automatically until success
<> 144:ef7eb2e8f9f7 167 * }
<> 144:ef7eb2e8f9f7 168 * return value + a
<> 144:ef7eb2e8f9f7 169 * }
<> 144:ef7eb2e8f9f7 170 */
<> 144:ef7eb2e8f9f7 171 bool core_util_atomic_cas_u16(uint16_t *ptr, uint16_t *expectedCurrentValue, uint16_t desiredValue);
<> 144:ef7eb2e8f9f7 172
<> 144:ef7eb2e8f9f7 173 /**
<> 144:ef7eb2e8f9f7 174 * Atomic compare and set. It compares the contents of a memory location to a
<> 144:ef7eb2e8f9f7 175 * given value and, only if they are the same, modifies the contents of that
<> 144:ef7eb2e8f9f7 176 * memory location to a given new value. This is done as a single atomic
<> 144:ef7eb2e8f9f7 177 * operation. The atomicity guarantees that the new value is calculated based on
<> 144:ef7eb2e8f9f7 178 * up-to-date information; if the value had been updated by another thread in
<> 144:ef7eb2e8f9f7 179 * the meantime, the write would fail due to a mismatched expectedCurrentValue.
<> 144:ef7eb2e8f9f7 180 *
<> 144:ef7eb2e8f9f7 181 * Refer to https://en.wikipedia.org/wiki/Compare-and-set [which may redirect
<> 144:ef7eb2e8f9f7 182 * you to the article on compare-and swap].
<> 144:ef7eb2e8f9f7 183 *
<> 144:ef7eb2e8f9f7 184 * @param ptr The target memory location.
<> 144:ef7eb2e8f9f7 185 * @param[in,out] expectedCurrentValue A pointer to some location holding the
<> 144:ef7eb2e8f9f7 186 * expected current value of the data being set atomically.
<> 144:ef7eb2e8f9f7 187 * The computed 'desiredValue' should be a function of this current value.
<> 144:ef7eb2e8f9f7 188 * @Note: This is an in-out parameter. In the
<> 144:ef7eb2e8f9f7 189 * failure case of atomic_cas (where the
<> 144:ef7eb2e8f9f7 190 * destination isn't set), the pointee of expectedCurrentValue is
<> 144:ef7eb2e8f9f7 191 * updated with the current value.
<> 144:ef7eb2e8f9f7 192 * @param[in] desiredValue The new value computed based on '*expectedCurrentValue'.
<> 144:ef7eb2e8f9f7 193 *
<> 144:ef7eb2e8f9f7 194 * @return true if the memory location was atomically
<> 144:ef7eb2e8f9f7 195 * updated with the desired value (after verifying
<> 144:ef7eb2e8f9f7 196 * that it contained the expectedCurrentValue),
<> 144:ef7eb2e8f9f7 197 * false otherwise. In the failure case,
<> 144:ef7eb2e8f9f7 198 * exepctedCurrentValue is updated with the new
<> 144:ef7eb2e8f9f7 199 * value of the target memory location.
<> 144:ef7eb2e8f9f7 200 *
<> 144:ef7eb2e8f9f7 201 * pseudocode:
<> 144:ef7eb2e8f9f7 202 * function cas(p : pointer to int, old : pointer to int, new : int) returns bool {
<> 144:ef7eb2e8f9f7 203 * if *p != *old {
<> 144:ef7eb2e8f9f7 204 * *old = *p
<> 144:ef7eb2e8f9f7 205 * return false
<> 144:ef7eb2e8f9f7 206 * }
<> 144:ef7eb2e8f9f7 207 * *p = new
<> 144:ef7eb2e8f9f7 208 * return true
<> 144:ef7eb2e8f9f7 209 * }
<> 144:ef7eb2e8f9f7 210 *
<> 144:ef7eb2e8f9f7 211 * @Note: In the failure case (where the destination isn't set), the value
<> 144:ef7eb2e8f9f7 212 * pointed to by expectedCurrentValue is still updated with the current value.
<> 144:ef7eb2e8f9f7 213 * This property helps writing concise code for the following incr:
<> 144:ef7eb2e8f9f7 214 *
<> 144:ef7eb2e8f9f7 215 * function incr(p : pointer to int, a : int) returns int {
<> 144:ef7eb2e8f9f7 216 * done = false
<> 144:ef7eb2e8f9f7 217 * value = *p // This fetch operation need not be atomic.
<> 144:ef7eb2e8f9f7 218 * while not done {
<> 144:ef7eb2e8f9f7 219 * done = atomic_cas(p, &value, value + a) // *value gets updated automatically until success
<> 144:ef7eb2e8f9f7 220 * }
<> 144:ef7eb2e8f9f7 221 * return value + a
<> 144:ef7eb2e8f9f7 222 * }
<> 144:ef7eb2e8f9f7 223 */
<> 144:ef7eb2e8f9f7 224 bool core_util_atomic_cas_u32(uint32_t *ptr, uint32_t *expectedCurrentValue, uint32_t desiredValue);
<> 144:ef7eb2e8f9f7 225
<> 144:ef7eb2e8f9f7 226 /**
<> 144:ef7eb2e8f9f7 227 * Atomic compare and set. It compares the contents of a memory location to a
<> 144:ef7eb2e8f9f7 228 * given value and, only if they are the same, modifies the contents of that
<> 144:ef7eb2e8f9f7 229 * memory location to a given new value. This is done as a single atomic
<> 144:ef7eb2e8f9f7 230 * operation. The atomicity guarantees that the new value is calculated based on
<> 144:ef7eb2e8f9f7 231 * up-to-date information; if the value had been updated by another thread in
<> 144:ef7eb2e8f9f7 232 * the meantime, the write would fail due to a mismatched expectedCurrentValue.
<> 144:ef7eb2e8f9f7 233 *
<> 144:ef7eb2e8f9f7 234 * Refer to https://en.wikipedia.org/wiki/Compare-and-set [which may redirect
<> 144:ef7eb2e8f9f7 235 * you to the article on compare-and swap].
<> 144:ef7eb2e8f9f7 236 *
<> 144:ef7eb2e8f9f7 237 * @param ptr The target memory location.
<> 144:ef7eb2e8f9f7 238 * @param[in,out] expectedCurrentValue A pointer to some location holding the
<> 144:ef7eb2e8f9f7 239 * expected current value of the data being set atomically.
<> 144:ef7eb2e8f9f7 240 * The computed 'desiredValue' should be a function of this current value.
<> 144:ef7eb2e8f9f7 241 * @Note: This is an in-out parameter. In the
<> 144:ef7eb2e8f9f7 242 * failure case of atomic_cas (where the
<> 144:ef7eb2e8f9f7 243 * destination isn't set), the pointee of expectedCurrentValue is
<> 144:ef7eb2e8f9f7 244 * updated with the current value.
<> 144:ef7eb2e8f9f7 245 * @param[in] desiredValue The new value computed based on '*expectedCurrentValue'.
<> 144:ef7eb2e8f9f7 246 *
<> 144:ef7eb2e8f9f7 247 * @return true if the memory location was atomically
<> 144:ef7eb2e8f9f7 248 * updated with the desired value (after verifying
<> 144:ef7eb2e8f9f7 249 * that it contained the expectedCurrentValue),
<> 144:ef7eb2e8f9f7 250 * false otherwise. In the failure case,
<> 144:ef7eb2e8f9f7 251 * exepctedCurrentValue is updated with the new
<> 144:ef7eb2e8f9f7 252 * value of the target memory location.
<> 144:ef7eb2e8f9f7 253 *
<> 144:ef7eb2e8f9f7 254 * pseudocode:
<> 144:ef7eb2e8f9f7 255 * function cas(p : pointer to int, old : pointer to int, new : int) returns bool {
<> 144:ef7eb2e8f9f7 256 * if *p != *old {
<> 144:ef7eb2e8f9f7 257 * *old = *p
<> 144:ef7eb2e8f9f7 258 * return false
<> 144:ef7eb2e8f9f7 259 * }
<> 144:ef7eb2e8f9f7 260 * *p = new
<> 144:ef7eb2e8f9f7 261 * return true
<> 144:ef7eb2e8f9f7 262 * }
<> 144:ef7eb2e8f9f7 263 *
<> 144:ef7eb2e8f9f7 264 * @Note: In the failure case (where the destination isn't set), the value
<> 144:ef7eb2e8f9f7 265 * pointed to by expectedCurrentValue is still updated with the current value.
<> 144:ef7eb2e8f9f7 266 * This property helps writing concise code for the following incr:
<> 144:ef7eb2e8f9f7 267 *
<> 144:ef7eb2e8f9f7 268 * function incr(p : pointer to int, a : int) returns int {
<> 144:ef7eb2e8f9f7 269 * done = false
<> 144:ef7eb2e8f9f7 270 * value = *p // This fetch operation need not be atomic.
<> 144:ef7eb2e8f9f7 271 * while not done {
<> 144:ef7eb2e8f9f7 272 * done = atomic_cas(p, &value, value + a) // *value gets updated automatically until success
<> 144:ef7eb2e8f9f7 273 * }
<> 144:ef7eb2e8f9f7 274 * return value + a
<> 144:ef7eb2e8f9f7 275 * }
<> 144:ef7eb2e8f9f7 276 */
<> 144:ef7eb2e8f9f7 277 bool core_util_atomic_cas_ptr(void **ptr, void **expectedCurrentValue, void *desiredValue);
<> 144:ef7eb2e8f9f7 278
<> 144:ef7eb2e8f9f7 279 /**
<> 144:ef7eb2e8f9f7 280 * Atomic increment.
<> 144:ef7eb2e8f9f7 281 * @param valuePtr Target memory location being incremented.
<> 144:ef7eb2e8f9f7 282 * @param delta The amount being incremented.
<> 144:ef7eb2e8f9f7 283 * @return The new incremented value.
<> 144:ef7eb2e8f9f7 284 */
<> 144:ef7eb2e8f9f7 285 uint8_t core_util_atomic_incr_u8(uint8_t *valuePtr, uint8_t delta);
<> 144:ef7eb2e8f9f7 286
<> 144:ef7eb2e8f9f7 287 /**
<> 144:ef7eb2e8f9f7 288 * Atomic increment.
<> 144:ef7eb2e8f9f7 289 * @param valuePtr Target memory location being incremented.
<> 144:ef7eb2e8f9f7 290 * @param delta The amount being incremented.
<> 144:ef7eb2e8f9f7 291 * @return The new incremented value.
<> 144:ef7eb2e8f9f7 292 */
<> 144:ef7eb2e8f9f7 293 uint16_t core_util_atomic_incr_u16(uint16_t *valuePtr, uint16_t delta);
<> 144:ef7eb2e8f9f7 294
<> 144:ef7eb2e8f9f7 295 /**
<> 144:ef7eb2e8f9f7 296 * Atomic increment.
<> 144:ef7eb2e8f9f7 297 * @param valuePtr Target memory location being incremented.
<> 144:ef7eb2e8f9f7 298 * @param delta The amount being incremented.
<> 144:ef7eb2e8f9f7 299 * @return The new incremented value.
<> 144:ef7eb2e8f9f7 300 */
<> 144:ef7eb2e8f9f7 301 uint32_t core_util_atomic_incr_u32(uint32_t *valuePtr, uint32_t delta);
<> 144:ef7eb2e8f9f7 302
<> 144:ef7eb2e8f9f7 303 /**
<> 144:ef7eb2e8f9f7 304 * Atomic increment.
<> 144:ef7eb2e8f9f7 305 * @param valuePtr Target memory location being incremented.
<> 144:ef7eb2e8f9f7 306 * @param delta The amount being incremented in bytes.
<> 144:ef7eb2e8f9f7 307 * @return The new incremented value.
<> 144:ef7eb2e8f9f7 308 *
<> 144:ef7eb2e8f9f7 309 * @note The type of the pointer argument is not taken into account
<> 144:ef7eb2e8f9f7 310 * and the pointer is incremented by bytes.
<> 144:ef7eb2e8f9f7 311 */
<> 144:ef7eb2e8f9f7 312 void *core_util_atomic_incr_ptr(void **valuePtr, ptrdiff_t delta);
<> 144:ef7eb2e8f9f7 313
<> 144:ef7eb2e8f9f7 314 /**
<> 144:ef7eb2e8f9f7 315 * Atomic decrement.
<> 144:ef7eb2e8f9f7 316 * @param valuePtr Target memory location being decremented.
<> 144:ef7eb2e8f9f7 317 * @param delta The amount being decremented.
<> 144:ef7eb2e8f9f7 318 * @return The new decremented value.
<> 144:ef7eb2e8f9f7 319 */
<> 144:ef7eb2e8f9f7 320 uint8_t core_util_atomic_decr_u8(uint8_t *valuePtr, uint8_t delta);
<> 144:ef7eb2e8f9f7 321
<> 144:ef7eb2e8f9f7 322 /**
<> 144:ef7eb2e8f9f7 323 * Atomic decrement.
<> 144:ef7eb2e8f9f7 324 * @param valuePtr Target memory location being decremented.
<> 144:ef7eb2e8f9f7 325 * @param delta The amount being decremented.
<> 144:ef7eb2e8f9f7 326 * @return The new decremented value.
<> 144:ef7eb2e8f9f7 327 */
<> 144:ef7eb2e8f9f7 328 uint16_t core_util_atomic_decr_u16(uint16_t *valuePtr, uint16_t delta);
<> 144:ef7eb2e8f9f7 329
<> 144:ef7eb2e8f9f7 330 /**
<> 144:ef7eb2e8f9f7 331 * Atomic decrement.
<> 144:ef7eb2e8f9f7 332 * @param valuePtr Target memory location being decremented.
<> 144:ef7eb2e8f9f7 333 * @param delta The amount being decremented.
<> 144:ef7eb2e8f9f7 334 * @return The new decremented value.
<> 144:ef7eb2e8f9f7 335 */
<> 144:ef7eb2e8f9f7 336 uint32_t core_util_atomic_decr_u32(uint32_t *valuePtr, uint32_t delta);
<> 144:ef7eb2e8f9f7 337
<> 144:ef7eb2e8f9f7 338 /**
<> 144:ef7eb2e8f9f7 339 * Atomic decrement.
<> 144:ef7eb2e8f9f7 340 * @param valuePtr Target memory location being decremented.
<> 144:ef7eb2e8f9f7 341 * @param delta The amount being decremented in bytes.
<> 144:ef7eb2e8f9f7 342 * @return The new decremented value.
<> 144:ef7eb2e8f9f7 343 *
<> 144:ef7eb2e8f9f7 344 * @note The type of the pointer argument is not taken into account
<> 144:ef7eb2e8f9f7 345 * and the pointer is decremented by bytes
<> 144:ef7eb2e8f9f7 346 */
<> 144:ef7eb2e8f9f7 347 void *core_util_atomic_decr_ptr(void **valuePtr, ptrdiff_t delta);
<> 144:ef7eb2e8f9f7 348
<> 144:ef7eb2e8f9f7 349 #ifdef __cplusplus
<> 144:ef7eb2e8f9f7 350 } // extern "C"
<> 144:ef7eb2e8f9f7 351 #endif
<> 144:ef7eb2e8f9f7 352
<> 144:ef7eb2e8f9f7 353
<> 144:ef7eb2e8f9f7 354 #endif // __MBED_UTIL_CRITICAL_H__