1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Set Specific Key |
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5 | * @ingroup POSIXAPI |
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6 | */ |
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7 | |
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8 | /* |
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9 | * Copyright (c) 2012 Zhongwei Yao. |
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10 | * COPYRIGHT (c) 1989-2014. |
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11 | * On-Line Applications Research Corporation (OAR). |
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12 | * Copyright (c) 2016 embedded brains GmbH. |
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13 | * |
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14 | * The license and distribution terms for this file may be |
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15 | * found in the file LICENSE in this distribution or at |
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16 | * http://www.rtems.org/license/LICENSE. |
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17 | */ |
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18 | |
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19 | #if HAVE_CONFIG_H |
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20 | #include "config.h" |
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21 | #endif |
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22 | |
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23 | #include <rtems/posix/keyimpl.h> |
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24 | |
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25 | #include <errno.h> |
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26 | |
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27 | static int _POSIX_Keys_Set_value( |
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28 | POSIX_Keys_Key_value_pair *key_value_pair, |
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29 | const void *value |
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30 | ) |
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31 | { |
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32 | key_value_pair->value = RTEMS_DECONST( void *, value ); |
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33 | |
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34 | return 0; |
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35 | } |
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36 | |
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37 | static int _POSIX_Keys_Create_value( |
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38 | pthread_key_t key, |
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39 | const void *value, |
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40 | Thread_Control *executing |
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41 | ) |
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42 | { |
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43 | POSIX_Keys_Control *the_key; |
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44 | int eno; |
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45 | |
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46 | _Objects_Allocator_lock(); |
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47 | |
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48 | the_key = _POSIX_Keys_Get( key ); |
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49 | if ( the_key != NULL ) { |
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50 | POSIX_Keys_Key_value_pair *key_value_pair; |
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51 | |
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52 | key_value_pair = _POSIX_Keys_Key_value_allocate(); |
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53 | if ( key_value_pair != NULL ) { |
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54 | ISR_lock_Context lock_context; |
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55 | |
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56 | key_value_pair->key = key; |
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57 | key_value_pair->thread = executing; |
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58 | key_value_pair->value = RTEMS_DECONST( void *, value ); |
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59 | |
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60 | _RBTree_Initialize_node( &key_value_pair->Lookup_node ); |
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61 | |
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62 | _Chain_Initialize_node( &key_value_pair->Key_node ); |
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63 | _Chain_Append_unprotected( |
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64 | &the_key->Key_value_pairs, |
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65 | &key_value_pair->Key_node |
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66 | ); |
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67 | |
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68 | _POSIX_Keys_Key_value_acquire( executing, &lock_context ); |
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69 | _POSIX_Keys_Key_value_insert( key, key_value_pair, executing ); |
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70 | _POSIX_Keys_Key_value_release( executing, &lock_context ); |
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71 | eno = 0; |
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72 | } else { |
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73 | eno = ENOMEM; |
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74 | } |
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75 | |
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76 | } else { |
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77 | eno = EINVAL; |
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78 | } |
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79 | |
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80 | _Objects_Allocator_unlock(); |
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81 | |
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82 | return eno; |
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83 | } |
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84 | |
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85 | static int _POSIX_Keys_Delete_value( |
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86 | pthread_key_t key, |
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87 | Thread_Control *executing |
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88 | ) |
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89 | { |
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90 | POSIX_Keys_Control *the_key; |
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91 | int eno; |
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92 | |
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93 | _Objects_Allocator_lock(); |
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94 | |
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95 | the_key = _POSIX_Keys_Get( key ); |
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96 | if ( the_key != NULL ) { |
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97 | POSIX_Keys_Key_value_pair *key_value_pair; |
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98 | ISR_lock_Context lock_context; |
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99 | |
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100 | _POSIX_Keys_Key_value_acquire( executing, &lock_context ); |
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101 | |
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102 | key_value_pair = _POSIX_Keys_Key_value_find( key, executing ); |
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103 | if ( key_value_pair != NULL ) { |
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104 | _RBTree_Extract( |
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105 | &executing->Keys.Key_value_pairs, |
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106 | &key_value_pair->Lookup_node |
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107 | ); |
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108 | |
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109 | _POSIX_Keys_Key_value_release( executing, &lock_context ); |
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110 | |
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111 | _POSIX_Keys_Key_value_free( key_value_pair ); |
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112 | } else { |
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113 | _POSIX_Keys_Key_value_release( executing, &lock_context ); |
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114 | } |
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115 | |
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116 | eno = 0; |
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117 | } else { |
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118 | eno = EINVAL; |
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119 | } |
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120 | |
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121 | _Objects_Allocator_unlock(); |
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122 | |
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123 | return eno; |
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124 | } |
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125 | |
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126 | /* |
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127 | * 17.1.2 Thread-Specific Data Management, P1003.1c/Draft 10, p. 165 |
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128 | */ |
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129 | |
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130 | int pthread_setspecific( |
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131 | pthread_key_t key, |
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132 | const void *value |
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133 | ) |
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134 | { |
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135 | Thread_Control *executing; |
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136 | int eno; |
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137 | |
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138 | executing = _Thread_Get_executing(); |
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139 | |
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140 | if ( value != NULL ) { |
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141 | ISR_lock_Context lock_context; |
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142 | POSIX_Keys_Key_value_pair *key_value_pair; |
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143 | |
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144 | _POSIX_Keys_Key_value_acquire( executing, &lock_context ); |
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145 | |
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146 | key_value_pair = _POSIX_Keys_Key_value_find( key, executing ); |
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147 | if ( key_value_pair != NULL ) { |
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148 | eno = _POSIX_Keys_Set_value( key_value_pair, value ); |
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149 | _POSIX_Keys_Key_value_release( executing, &lock_context ); |
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150 | } else { |
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151 | _POSIX_Keys_Key_value_release( executing, &lock_context ); |
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152 | eno = _POSIX_Keys_Create_value( key, value, executing ); |
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153 | } |
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154 | } else { |
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155 | eno = _POSIX_Keys_Delete_value( key, executing ); |
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156 | } |
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157 | |
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158 | return eno; |
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159 | } |
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