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_ULONG(value) CPU_ATOMIC_INITIALIZER_ULONG(value) |
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39 | #define ATOMIC_INITIALIZER_PTR(value) CPU_ATOMIC_INITIALIZER_PTR(value) |
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40 | |
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41 | /** |
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42 | * @brief Initializes an atomic flag object to the cleared state. |
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43 | */ |
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44 | #define ATOMIC_INITIALIZER_FLAG CPU_ATOMIC_INITIALIZER_FLAG |
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45 | |
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46 | /** |
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47 | * @brief Initializes an atomic type value into a atomic object. |
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48 | * |
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49 | * @param object an atomic type pointer of object. |
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50 | * @param pointer a pointer to be stored into object. |
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51 | */ |
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52 | static inline void _Atomic_Init_uint( |
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53 | volatile Atomic_Uint *object, |
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54 | unsigned int value |
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55 | ) |
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56 | { |
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57 | _CPU_atomic_Init_uint(object, value); |
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58 | } |
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59 | |
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60 | static inline void _Atomic_Init_ulong( |
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61 | volatile Atomic_Ulong *object, |
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62 | unsigned long value |
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63 | ) |
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64 | { |
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65 | _CPU_atomic_Init_ulong(object, value); |
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66 | } |
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67 | |
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68 | static inline void _Atomic_Init_ptr( |
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69 | volatile Atomic_Pointer *object, |
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70 | void *pointer |
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71 | ) |
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72 | { |
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73 | _CPU_atomic_Init_ptr(object, pointer); |
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74 | } |
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75 | |
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76 | /** |
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77 | * @brief Atomically load an atomic type value from atomic object. |
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78 | * |
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79 | * @param object an atomic type pointer of object. |
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80 | * @param order a type of Atomic_Order. |
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81 | * |
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82 | * The order shall not be ATOMIC_ORDER_RELEASE. |
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83 | */ |
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84 | static inline unsigned int _Atomic_Load_uint( |
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85 | volatile Atomic_Uint *object, |
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86 | Atomic_Order order |
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87 | ) |
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88 | { |
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89 | return _CPU_atomic_Load_uint( object, order ); |
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90 | } |
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91 | |
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92 | static inline unsigned long _Atomic_Load_ulong( |
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93 | volatile Atomic_Ulong *object, |
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94 | Atomic_Order order |
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95 | ) |
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96 | { |
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97 | return _CPU_atomic_Load_ulong( object, order ); |
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98 | } |
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99 | |
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100 | static inline void *_Atomic_Load_ptr( |
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101 | volatile Atomic_Pointer *object, |
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102 | Atomic_Order order |
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103 | ) |
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104 | { |
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105 | return _CPU_atomic_Load_ptr( object, order ); |
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106 | } |
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107 | |
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108 | /** |
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109 | * @brief Atomically store an atomic type value into a atomic object. |
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110 | * |
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111 | * @param object an atomic type pointer of object. |
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112 | * @param value a value to be stored into object. |
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113 | * @param order a type of Atomic_Order. |
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114 | * |
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115 | * The order shall not be ATOMIC_ORDER_ACQUIRE. |
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116 | */ |
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117 | static inline void _Atomic_Store_uint( |
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118 | volatile Atomic_Uint *object, |
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119 | unsigned int value, |
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120 | Atomic_Order order |
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121 | ) |
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122 | { |
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123 | _CPU_atomic_Store_uint( object, value, order ); |
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124 | } |
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125 | |
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126 | static inline void _Atomic_Store_ulong( |
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127 | volatile Atomic_Ulong *object, |
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128 | unsigned long value, |
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129 | Atomic_Order order |
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130 | ) |
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131 | { |
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132 | _CPU_atomic_Store_ulong( object, value, order ); |
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133 | } |
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134 | |
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135 | static inline void _Atomic_Store_ptr( |
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136 | volatile Atomic_Pointer *object, |
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137 | void *pointer, |
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138 | Atomic_Order order |
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139 | ) |
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140 | { |
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141 | _CPU_atomic_Store_ptr( object, pointer, order ); |
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142 | } |
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143 | |
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144 | /** |
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145 | * @brief Atomically load-add-store an atomic type value into object |
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146 | * |
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147 | * @param object a atomic type pointer of object. |
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148 | * @param value a value to be add and store into object. |
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149 | * @param order a type of Atomic_Order. |
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150 | * |
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151 | * @retval a result value before add ops. |
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152 | */ |
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153 | static inline unsigned int _Atomic_Fetch_add_uint( |
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154 | volatile Atomic_Uint *object, |
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155 | unsigned int value, |
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156 | Atomic_Order order |
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157 | ) |
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158 | { |
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159 | return _CPU_atomic_Fetch_add_uint( object, value, order ); |
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160 | } |
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161 | |
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162 | static inline unsigned long _Atomic_Fetch_add_ulong( |
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163 | volatile Atomic_Ulong *object, |
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164 | unsigned long value, |
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165 | Atomic_Order order |
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166 | ) |
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167 | { |
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168 | return _CPU_atomic_Fetch_add_ulong( object, value, order ); |
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169 | } |
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170 | |
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171 | static inline uintptr_t _Atomic_Fetch_add_ptr( |
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172 | volatile Atomic_Pointer *object, |
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173 | uintptr_t value, |
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174 | Atomic_Order order |
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175 | ) |
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176 | { |
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177 | return _CPU_atomic_Fetch_add_ptr( object, value, order ); |
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178 | } |
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179 | |
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180 | /** |
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181 | * @brief Atomically load-sub-store an atomic type value into object |
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182 | * |
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183 | * @param object a atomic type pointer of object. |
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184 | * @param value a value to be sub and store into object. |
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185 | * @param order a type of Atomic_Order. |
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186 | * |
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187 | * @retval a result value before sub ops. |
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188 | */ |
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189 | static inline unsigned int _Atomic_Fetch_sub_uint( |
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190 | volatile Atomic_Uint *object, |
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191 | unsigned int value, |
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192 | Atomic_Order order |
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193 | ) |
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194 | { |
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195 | return _CPU_atomic_Fetch_sub_uint( object, value, order ); |
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196 | } |
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197 | |
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198 | static inline unsigned long _Atomic_Fetch_sub_ulong( |
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199 | volatile Atomic_Ulong *object, |
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200 | unsigned long value, |
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201 | Atomic_Order order |
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202 | ) |
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203 | { |
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204 | return _CPU_atomic_Fetch_sub_ulong( object, value, order ); |
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205 | } |
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206 | |
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207 | static inline uintptr_t _Atomic_Fetch_sub_ptr( |
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208 | volatile Atomic_Pointer *object, |
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209 | uintptr_t value, |
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210 | Atomic_Order order |
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211 | ) |
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212 | { |
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213 | return _CPU_atomic_Fetch_sub_ptr( object, value, order ); |
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214 | } |
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215 | |
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216 | /** |
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217 | * @brief Atomically load-or-store an atomic type value into object |
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218 | * |
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219 | * @param object a atomic type pointer of object. |
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220 | * @param value a value to be or and store into object. |
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221 | * @param order a type of Atomic_Order. |
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222 | * |
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223 | * @retval a result value before or ops. |
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224 | */ |
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225 | static inline unsigned int _Atomic_Fetch_or_uint( |
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226 | volatile Atomic_Uint *object, |
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227 | unsigned int value, |
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228 | Atomic_Order order |
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229 | ) |
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230 | { |
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231 | return _CPU_atomic_Fetch_or_uint( object, value, order ); |
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232 | } |
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233 | |
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234 | static inline unsigned long _Atomic_Fetch_or_ulong( |
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235 | volatile Atomic_Ulong *object, |
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236 | unsigned long value, |
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237 | Atomic_Order order |
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238 | ) |
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239 | { |
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240 | return _CPU_atomic_Fetch_or_ulong( object, value, order ); |
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241 | } |
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242 | |
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243 | static inline uintptr_t _Atomic_Fetch_or_ptr( |
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244 | volatile Atomic_Pointer *object, |
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245 | uintptr_t value, |
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246 | Atomic_Order order |
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247 | ) |
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248 | { |
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249 | return _CPU_atomic_Fetch_or_ptr( object, value, order ); |
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250 | } |
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251 | |
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252 | /** |
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253 | * @brief Atomically load-and-store an atomic type value into object |
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254 | * |
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255 | * @param object a atomic type pointer of object. |
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256 | * @param value a value to be and and store into object. |
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257 | * @param order a type of Atomic_Order. |
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258 | * |
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259 | * @retval a result value before and ops. |
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260 | */ |
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261 | static inline unsigned int _Atomic_Fetch_and_uint( |
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262 | volatile Atomic_Uint *object, |
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263 | unsigned int value, |
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264 | Atomic_Order order |
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265 | ) |
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266 | { |
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267 | return _CPU_atomic_Fetch_and_uint( object, value, order ); |
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268 | } |
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269 | |
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270 | static inline unsigned long _Atomic_Fetch_and_ulong( |
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271 | volatile Atomic_Ulong *object, |
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272 | unsigned long value, |
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273 | Atomic_Order order |
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274 | ) |
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275 | { |
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276 | return _CPU_atomic_Fetch_and_ulong( object, value, order ); |
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277 | } |
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278 | |
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279 | static inline uintptr_t _Atomic_Fetch_and_ptr( |
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280 | volatile Atomic_Pointer *object, |
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281 | uintptr_t value, |
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282 | Atomic_Order order |
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283 | ) |
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284 | { |
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285 | return _CPU_atomic_Fetch_and_ptr( object, value, order ); |
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286 | } |
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287 | |
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288 | /** |
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289 | * @brief Atomically exchange an atomic type value into object |
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290 | * |
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291 | * @param object a atomic type pointer of object. |
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292 | * @param value a value to exchange and and store into object. |
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293 | * @param order a type of Atomic_Order. |
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294 | * |
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295 | * @retval a result value before exchange ops. |
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296 | */ |
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297 | static inline unsigned int _Atomic_Exchange_uint( |
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298 | volatile Atomic_Uint *object, |
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299 | unsigned int value, |
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300 | Atomic_Order order |
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301 | ) |
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302 | { |
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303 | return _CPU_atomic_Exchange_uint( object, value, order ); |
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304 | } |
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305 | |
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306 | static inline unsigned long _Atomic_Exchange_ulong( |
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307 | volatile Atomic_Ulong *object, |
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308 | unsigned long value, |
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309 | Atomic_Order order |
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310 | ) |
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311 | { |
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312 | return _CPU_atomic_Exchange_ulong( object, value, order ); |
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313 | } |
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314 | |
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315 | static inline void *_Atomic_Exchange_ptr( |
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316 | volatile Atomic_Pointer *object, |
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317 | void *pointer, |
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318 | Atomic_Order order |
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319 | ) |
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320 | { |
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321 | return _CPU_atomic_Exchange_ptr( object, pointer, order ); |
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322 | } |
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323 | |
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324 | /** |
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325 | * @brief Atomically compare the value stored at object with a |
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326 | * old_value and if the two values are equal, update the value of a |
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327 | * address with a new_value |
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328 | * |
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329 | * @param object a atomic type pointer of object. |
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330 | * @param old_value pointer of a value. |
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331 | * @param new_value a atomic type value. |
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332 | * @param order_succ a type of Atomic_Order for successful exchange. |
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333 | * @param order_fail a type of Atomic_Order for failed exchange. |
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334 | * |
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335 | * @retval true if the compare exchange successully. |
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336 | * @retval false if the compare exchange failed. |
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337 | */ |
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338 | static inline bool _Atomic_Compare_exchange_uint( |
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339 | volatile Atomic_Uint *object, |
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340 | unsigned int *old_value, |
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341 | unsigned int new_value, |
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342 | Atomic_Order order_succ, |
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343 | Atomic_Order order_fail |
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344 | ) |
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345 | { |
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346 | return _CPU_atomic_Compare_exchange_uint( object, old_value, new_value, |
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347 | order_succ, order_fail ); |
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348 | } |
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349 | |
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350 | static inline bool _Atomic_Compare_exchange_ulong( |
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351 | volatile Atomic_Ulong *object, |
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352 | unsigned long *old_value, |
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353 | unsigned long new_value, |
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354 | Atomic_Order order_succ, |
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355 | Atomic_Order order_fail |
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356 | ) |
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357 | { |
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358 | return _CPU_atomic_Compare_exchange_ulong( object, old_value, new_value, |
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359 | order_succ, order_fail ); |
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360 | } |
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361 | |
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362 | static inline bool _Atomic_Compare_exchange_ptr( |
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363 | volatile Atomic_Pointer *object, |
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364 | void **old_pointer, |
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365 | void *new_pointer, |
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366 | Atomic_Order order_succ, |
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367 | Atomic_Order order_fail |
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368 | ) |
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369 | { |
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370 | return _CPU_atomic_Compare_exchange_ptr( object, old_pointer, new_pointer, |
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371 | order_succ, order_fail ); |
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372 | } |
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373 | |
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374 | /** |
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375 | * @brief Atomically clears an atomic flag. |
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376 | * |
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377 | * @param[in, out] object Pointer to the atomic flag object. |
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378 | * @param[in] order The atomic memory order. |
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379 | * |
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380 | */ |
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381 | static inline void _Atomic_Flag_clear( |
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382 | volatile Atomic_Flag *object, |
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383 | Atomic_Order order |
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384 | ) |
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385 | { |
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386 | _CPU_atomic_Flag_clear( object, order ); |
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387 | } |
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388 | |
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389 | /** |
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390 | * @brief Atomically tests and sets an atomic flag. |
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391 | * |
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392 | * @param[in, out] object Pointer to the atomic flag object. |
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393 | * @param[in] order The atomic memory order. |
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394 | * |
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395 | * @retval true The atomic flag was already set. |
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396 | * @retval false Otherwise. |
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397 | */ |
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398 | static inline bool _Atomic_Flag_test_and_set( |
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399 | volatile Atomic_Flag *object, |
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400 | Atomic_Order order |
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401 | ) |
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402 | { |
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403 | return _CPU_atomic_Flag_test_and_set( object, order ); |
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404 | } |
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405 | |
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406 | #ifdef __cplusplus |
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407 | } |
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408 | #endif |
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409 | |
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410 | /**@}*/ |
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411 | #endif |
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412 | /* end of include file */ |
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