1 | /** |
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2 | * @file rtems/score/atomic.h |
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3 | * |
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4 | * This include file defines the interface for all the atomic |
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5 | * operations which can be used in the synchronization primitives |
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6 | * or in the lock-less algorithms. You should not use these API |
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7 | * in the other components directly. |
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8 | */ |
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9 | |
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10 | /* |
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11 | * COPYRIGHT (c) 2012-2013 Deng Hengyi. |
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12 | * |
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13 | * The license and distribution terms for this file may be |
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14 | * found in the file LICENSE in this distribution or at |
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15 | * http://www.rtems.com/license/LICENSE. |
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16 | */ |
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17 | |
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18 | #ifndef _RTEMS_SCORE_ATOMIC_H |
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19 | #define _RTEMS_SCORE_ATOMIC_H |
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20 | |
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21 | #include <rtems/score/cpuatomic.h> |
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22 | |
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23 | #ifdef __cplusplus |
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24 | extern "C" { |
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25 | #endif |
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26 | |
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27 | /** |
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28 | * @defgroup RTEMS atomic interface |
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29 | * |
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30 | */ |
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31 | |
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32 | /**@{*/ |
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33 | |
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34 | /** |
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35 | * @brief atomic data initializer for static initialization. |
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36 | */ |
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37 | #define ATOMIC_INITIALIZER_UINT(value) CPU_ATOMIC_INITIALIZER_UINT(value) |
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38 | #define ATOMIC_INITIALIZER_PTR(value) CPU_ATOMIC_INITIALIZER_PTR(value) |
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39 | #define ATOMIC_INITIALIZER_FLAG(value) CPU_ATOMIC_INITIALIZER_FLAG(value) |
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40 | |
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41 | /** |
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42 | * @brief Initializes an atomic type value into a atomic object. |
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43 | * |
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44 | * @param object an atomic type pointer of object. |
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45 | * @param value a value to be stored into object. |
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46 | */ |
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47 | RTEMS_INLINE_ROUTINE void _Atomic_Init_uint( |
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48 | volatile Atomic_Uint *object, |
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49 | uint_fast32_t value |
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50 | ) |
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51 | { |
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52 | _CPU_atomic_Init_uint(object, value); |
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53 | } |
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54 | |
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55 | RTEMS_INLINE_ROUTINE void _Atomic_Init_ptr( |
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56 | volatile Atomic_Pointer *object, |
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57 | uintptr_t value |
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58 | ) |
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59 | { |
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60 | _CPU_atomic_Init_ptr(object, value); |
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61 | } |
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62 | |
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63 | RTEMS_INLINE_ROUTINE void _Atomic_Init_flag( |
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64 | volatile Atomic_Flag *object, |
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65 | _Bool value |
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66 | ) |
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67 | { |
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68 | _CPU_atomic_Init_flag(object, value); |
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69 | } |
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70 | |
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71 | /** |
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72 | * @brief Atomically load an atomic type value from atomic object. |
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73 | * |
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74 | * @param object an atomic type pointer of object. |
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75 | * @param order a type of Atomic_Order. |
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76 | * |
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77 | * The order shall not be ATOMIC_ORDER_RELEASE. |
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78 | */ |
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79 | RTEMS_INLINE_ROUTINE uint_fast32_t _Atomic_Load_uint( |
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80 | volatile Atomic_Uint *object, |
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81 | Atomic_Order order |
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82 | ) |
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83 | { |
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84 | return _CPU_atomic_Load_uint( object, order ); |
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85 | } |
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86 | |
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87 | RTEMS_INLINE_ROUTINE uintptr_t _Atomic_Load_ptr( |
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88 | volatile Atomic_Pointer *object, |
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89 | Atomic_Order order |
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90 | ) |
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91 | { |
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92 | return _CPU_atomic_Load_ptr( object, order ); |
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93 | } |
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94 | |
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95 | /** |
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96 | * @brief Atomically store an atomic type value into a atomic object. |
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97 | * |
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98 | * @param object an atomic type pointer of object. |
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99 | * @param value a value to be stored into object. |
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100 | * @param order a type of Atomic_Order. |
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101 | * |
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102 | * The order shall not be ATOMIC_ORDER_ACQUIRE. |
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103 | */ |
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104 | RTEMS_INLINE_ROUTINE void _Atomic_Store_uint( |
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105 | volatile Atomic_Uint *object, |
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106 | uint_fast32_t value, |
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107 | Atomic_Order order |
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108 | ) |
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109 | { |
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110 | _CPU_atomic_Store_uint( object, value, order ); |
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111 | } |
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112 | |
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113 | RTEMS_INLINE_ROUTINE void _Atomic_Store_ptr( |
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114 | volatile Atomic_Pointer *object, |
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115 | uintptr_t value, |
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116 | Atomic_Order order |
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117 | ) |
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118 | { |
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119 | _CPU_atomic_Store_ptr( object, value, order ); |
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120 | } |
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121 | |
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122 | /** |
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123 | * @brief Atomically load-add-store an atomic type value into object |
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124 | * |
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125 | * @param object a atomic type pointer of object. |
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126 | * @param value a value to be add and store into object. |
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127 | * @param order a type of Atomic_Order. |
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128 | * |
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129 | * @retval a result value before add ops. |
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130 | */ |
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131 | RTEMS_INLINE_ROUTINE uint_fast32_t _Atomic_Fetch_add_uint( |
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132 | volatile Atomic_Uint *object, |
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133 | uint_fast32_t value, |
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134 | Atomic_Order order |
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135 | ) |
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136 | { |
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137 | return _CPU_atomic_Fetch_add_uint( object, value, order ); |
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138 | } |
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139 | |
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140 | RTEMS_INLINE_ROUTINE uintptr_t _Atomic_Fetch_add_ptr( |
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141 | volatile Atomic_Pointer *object, |
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142 | uintptr_t value, |
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143 | Atomic_Order order |
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144 | ) |
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145 | { |
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146 | return _CPU_atomic_Fetch_add_ptr( object, value, order ); |
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147 | } |
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148 | |
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149 | /** |
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150 | * @brief Atomically load-sub-store an atomic type value into object |
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151 | * |
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152 | * @param object a atomic type pointer of object. |
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153 | * @param value a value to be sub and store into object. |
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154 | * @param order a type of Atomic_Order. |
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155 | * |
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156 | * @retval a result value before sub ops. |
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157 | */ |
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158 | RTEMS_INLINE_ROUTINE uint_fast32_t _Atomic_Fetch_sub_uint( |
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159 | volatile Atomic_Uint *object, |
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160 | uint_fast32_t value, |
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161 | Atomic_Order order |
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162 | ) |
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163 | { |
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164 | return _CPU_atomic_Fetch_sub_uint( object, value, order ); |
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165 | } |
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166 | |
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167 | RTEMS_INLINE_ROUTINE uintptr_t _Atomic_Fetch_sub_ptr( |
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168 | volatile Atomic_Pointer *object, |
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169 | uintptr_t value, |
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170 | Atomic_Order order |
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171 | ) |
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172 | { |
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173 | return _CPU_atomic_Fetch_sub_ptr( object, value, order ); |
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174 | } |
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175 | |
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176 | /** |
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177 | * @brief Atomically load-or-store an atomic type value into object |
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178 | * |
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179 | * @param object a atomic type pointer of object. |
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180 | * @param value a value to be or and store into object. |
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181 | * @param order a type of Atomic_Order. |
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182 | * |
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183 | * @retval a result value before or ops. |
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184 | */ |
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185 | RTEMS_INLINE_ROUTINE uint_fast32_t _Atomic_Fetch_or_uint( |
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186 | volatile Atomic_Uint *object, |
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187 | uint_fast32_t value, |
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188 | Atomic_Order order |
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189 | ) |
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190 | { |
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191 | return _CPU_atomic_Fetch_or_uint( object, value, order ); |
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192 | } |
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193 | |
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194 | RTEMS_INLINE_ROUTINE uintptr_t _Atomic_Fetch_or_ptr( |
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195 | volatile Atomic_Pointer *object, |
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196 | uintptr_t value, |
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197 | Atomic_Order order |
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198 | ) |
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199 | { |
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200 | return _CPU_atomic_Fetch_or_ptr( object, value, order ); |
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201 | } |
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202 | |
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203 | /** |
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204 | * @brief Atomically load-and-store an atomic type value into object |
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205 | * |
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206 | * @param object a atomic type pointer of object. |
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207 | * @param value a value to be and and store into object. |
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208 | * @param order a type of Atomic_Order. |
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209 | * |
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210 | * @retval a result value before and ops. |
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211 | */ |
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212 | RTEMS_INLINE_ROUTINE uint_fast32_t _Atomic_Fetch_and_uint( |
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213 | volatile Atomic_Uint *object, |
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214 | uint_fast32_t value, |
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215 | Atomic_Order order |
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216 | ) |
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217 | { |
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218 | return _CPU_atomic_Fetch_and_uint( object, value, order ); |
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219 | } |
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220 | |
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221 | RTEMS_INLINE_ROUTINE uintptr_t _Atomic_Fetch_and_ptr( |
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222 | volatile Atomic_Pointer *object, |
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223 | uintptr_t value, |
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224 | Atomic_Order order |
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225 | ) |
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226 | { |
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227 | return _CPU_atomic_Fetch_and_ptr( object, value, order ); |
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228 | } |
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229 | |
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230 | /** |
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231 | * @brief Atomically exchange an atomic type value into object |
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232 | * |
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233 | * @param object a atomic type pointer of object. |
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234 | * @param value a value to exchange and and store into object. |
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235 | * @param order a type of Atomic_Order. |
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236 | * |
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237 | * @retval a result value before exchange ops. |
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238 | */ |
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239 | RTEMS_INLINE_ROUTINE uint_fast32_t _Atomic_Exchange_uint( |
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240 | volatile Atomic_Uint *object, |
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241 | uint_fast32_t value, |
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242 | Atomic_Order order |
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243 | ) |
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244 | { |
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245 | return _CPU_atomic_Exchange_uint( object, value, order ); |
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246 | } |
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247 | |
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248 | RTEMS_INLINE_ROUTINE uintptr_t _Atomic_Exchange_ptr( |
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249 | volatile Atomic_Pointer *object, |
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250 | uintptr_t value, |
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251 | Atomic_Order order |
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252 | ) |
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253 | { |
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254 | return _CPU_atomic_Exchange_ptr( object, value, order ); |
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255 | } |
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256 | |
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257 | /** |
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258 | * @brief Atomically compare the value stored at object with a |
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259 | * old_value and if the two values are equal, update the value of a |
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260 | * address with a new_value |
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261 | * |
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262 | * @param object a atomic type pointer of object. |
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263 | * @param old_value pointer of a value. |
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264 | * @param new_value a atomic type value. |
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265 | * @param order_succ a type of Atomic_Order for successful exchange. |
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266 | * @param order_fail a type of Atomic_Order for failed exchange. |
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267 | * |
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268 | * @retval true if the compare exchange successully. |
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269 | * @retval false if the compare exchange failed. |
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270 | */ |
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271 | RTEMS_INLINE_ROUTINE bool _Atomic_Compare_exchange_uint( |
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272 | volatile Atomic_Uint *object, |
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273 | uint_fast32_t *old_value, |
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274 | uint_fast32_t new_value, |
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275 | Atomic_Order order_succ, |
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276 | Atomic_Order order_fail |
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277 | ) |
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278 | { |
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279 | return _CPU_atomic_Compare_exchange_uint( object, old_value, new_value, |
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280 | order_succ, order_fail ); |
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281 | } |
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282 | |
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283 | RTEMS_INLINE_ROUTINE bool _Atomic_Compare_exchange_ptr( |
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284 | volatile Atomic_Pointer *object, |
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285 | uintptr_t *old_value, |
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286 | uintptr_t new_value, |
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287 | Atomic_Order order_succ, |
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288 | Atomic_Order order_fail |
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289 | ) |
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290 | { |
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291 | return _CPU_atomic_Compare_exchange_ptr( object, old_value, new_value, |
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292 | order_succ, order_fail ); |
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293 | } |
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294 | |
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295 | /** |
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296 | * @brief Atomically clear the value of an atomic flag type object. |
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297 | * |
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298 | * @param[in, out] object an atomic flag type pointer of object. |
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299 | * @param order a type of Atomic_Order. |
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300 | * |
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301 | */ |
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302 | RTEMS_INLINE_ROUTINE void _Atomic_Clear_flag( |
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303 | volatile Atomic_Flag *object, |
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304 | Atomic_Order order |
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305 | ) |
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306 | { |
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307 | _CPU_atomic_Clear_flag( object, order ); |
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308 | } |
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309 | |
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310 | /** |
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311 | * @brief Atomically test and clear the value of an atomic flag type object. |
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312 | * |
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313 | * @param[in, out] object an atomic flag type pointer of object. |
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314 | * @param order a type of Atomic_Order. |
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315 | * |
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316 | * @retval true if the test and set successully. |
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317 | * @retval false if the test and set failed. |
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318 | */ |
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319 | RTEMS_INLINE_ROUTINE bool _Atomic_Test_set_flag( |
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320 | volatile Atomic_Flag *object, |
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321 | Atomic_Order order |
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322 | ) |
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323 | { |
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324 | return _CPU_atomic_Test_set_flag( object, order ); |
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325 | } |
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326 | |
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327 | #ifdef __cplusplus |
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328 | } |
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329 | #endif |
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330 | |
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331 | /**@}*/ |
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332 | #endif |
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333 | /* end of include file */ |
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