1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Private Inlined Routines for POSIX Semaphores |
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5 | * |
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6 | * This include file contains the static inline implementation of the private |
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7 | * inlined routines for POSIX Semaphores. |
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8 | */ |
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9 | |
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10 | /* |
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11 | * COPYRIGHT (c) 1989-2013. |
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12 | * On-Line Applications Research Corporation (OAR). |
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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 | #ifndef _RTEMS_POSIX_SEMAPHOREIMPL_H |
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20 | #define _RTEMS_POSIX_SEMAPHOREIMPL_H |
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21 | |
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22 | #include <rtems/posix/semaphore.h> |
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23 | #include <rtems/posix/posixapi.h> |
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24 | #include <rtems/score/coresemimpl.h> |
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25 | |
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26 | #include <errno.h> |
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27 | |
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28 | #ifdef __cplusplus |
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29 | extern "C" { |
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30 | #endif |
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31 | |
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32 | /** |
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33 | * This defines the information control block used to manage |
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34 | * this class of objects. |
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35 | */ |
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36 | extern Objects_Information _POSIX_Semaphore_Information; |
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37 | |
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38 | /** |
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39 | * This defines the mapping from Score status codes to POSIX return codes. |
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40 | */ |
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41 | extern const int |
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42 | _POSIX_Semaphore_Return_codes[CORE_SEMAPHORE_STATUS_LAST + 1]; |
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43 | |
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44 | RTEMS_INLINE_ROUTINE POSIX_Semaphore_Control * |
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45 | _POSIX_Semaphore_Allocate_unprotected( void ) |
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46 | { |
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47 | return (POSIX_Semaphore_Control *) |
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48 | _Objects_Allocate_unprotected( &_POSIX_Semaphore_Information ); |
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49 | } |
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50 | |
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51 | /** |
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52 | * @brief POSIX Semaphore Free |
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53 | * |
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54 | * This routine frees a semaphore control block to the |
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55 | * inactive chain of free semaphore control blocks. |
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56 | */ |
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57 | RTEMS_INLINE_ROUTINE void _POSIX_Semaphore_Free ( |
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58 | POSIX_Semaphore_Control *the_semaphore |
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59 | ) |
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60 | { |
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61 | _Objects_Free( &_POSIX_Semaphore_Information, &the_semaphore->Object ); |
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62 | } |
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63 | |
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64 | /** |
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65 | * @brief POSIX Semaphore Get |
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66 | * |
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67 | * This function maps semaphore IDs to semaphore control blocks. |
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68 | * If ID corresponds to a local semaphore, then it returns |
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69 | * the_semaphore control pointer which maps to ID and location |
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70 | * is set to OBJECTS_LOCAL. if the semaphore ID is global and |
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71 | * resides on a remote node, then location is set to OBJECTS_REMOTE, |
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72 | * and the_semaphore is undefined. Otherwise, location is set |
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73 | * to OBJECTS_ERROR and the_semaphore is undefined. |
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74 | */ |
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75 | RTEMS_INLINE_ROUTINE POSIX_Semaphore_Control *_POSIX_Semaphore_Get ( |
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76 | sem_t *id, |
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77 | Objects_Locations *location |
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78 | ) |
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79 | { |
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80 | return (POSIX_Semaphore_Control *) |
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81 | _Objects_Get( &_POSIX_Semaphore_Information, (Objects_Id)*id, location ); |
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82 | } |
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83 | |
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84 | RTEMS_INLINE_ROUTINE POSIX_Semaphore_Control * |
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85 | _POSIX_Semaphore_Get_interrupt_disable( |
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86 | sem_t *id, |
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87 | Objects_Locations *location, |
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88 | ISR_lock_Context *lock_context |
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89 | ) |
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90 | { |
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91 | return (POSIX_Semaphore_Control *) _Objects_Get_isr_disable( |
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92 | &_POSIX_Semaphore_Information, |
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93 | (Objects_Id)*id, |
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94 | location, |
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95 | lock_context |
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96 | ); |
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97 | } |
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98 | |
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99 | /** |
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100 | * @brief POSIX Semaphore Create Support |
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101 | * |
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102 | * This routine supports the sem_init and sem_open routines. |
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103 | */ |
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104 | |
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105 | int _POSIX_Semaphore_Create_support( |
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106 | const char *name, |
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107 | size_t name_len, |
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108 | int pshared, |
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109 | unsigned int value, |
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110 | POSIX_Semaphore_Control **the_sem |
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111 | ); |
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112 | |
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113 | /** |
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114 | * @brief POSIX Semaphore Delete |
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115 | * |
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116 | * This routine supports the sem_close and sem_unlink routines. |
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117 | */ |
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118 | void _POSIX_Semaphore_Delete( |
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119 | POSIX_Semaphore_Control *the_semaphore |
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120 | ); |
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121 | |
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122 | /** |
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123 | * @brief POSIX semaphore wait support. |
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124 | * |
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125 | * This routine supports the sem_wait, sem_trywait, and sem_timedwait |
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126 | * services. |
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127 | */ |
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128 | int _POSIX_Semaphore_Wait_support( |
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129 | sem_t *sem, |
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130 | bool blocking, |
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131 | Watchdog_Interval timeout |
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132 | ); |
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133 | |
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134 | /** |
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135 | * @brief POSIX Semaphore Translate Score to POSIX Return Codes |
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136 | * |
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137 | * A support routine which converts core semaphore status codes into the |
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138 | * appropriate POSIX status values. |
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139 | */ |
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140 | RTEMS_INLINE_ROUTINE int |
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141 | _POSIX_Semaphore_Translate_core_semaphore_return_code( |
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142 | CORE_semaphore_Status the_semaphore_status |
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143 | ) |
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144 | { |
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145 | /* |
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146 | * Internal consistency check for bad status from SuperCore |
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147 | */ |
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148 | #if defined(RTEMS_DEBUG) |
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149 | if ( the_semaphore_status > CORE_SEMAPHORE_STATUS_LAST ) |
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150 | return EINVAL; |
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151 | #endif |
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152 | return _POSIX_Semaphore_Return_codes[the_semaphore_status]; |
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153 | } |
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154 | |
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155 | /** |
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156 | * @brief POSIX Semaphore Namespace Remove |
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157 | */ |
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158 | RTEMS_INLINE_ROUTINE void _POSIX_Semaphore_Namespace_remove ( |
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159 | POSIX_Semaphore_Control *the_semaphore |
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160 | ) |
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161 | { |
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162 | _Objects_Namespace_remove( |
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163 | &_POSIX_Semaphore_Information, &the_semaphore->Object ); |
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164 | } |
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165 | |
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166 | RTEMS_INLINE_ROUTINE POSIX_Semaphore_Control *_POSIX_Semaphore_Get_by_name( |
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167 | const char *name, |
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168 | size_t *name_length_p, |
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169 | Objects_Get_by_name_error *error |
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170 | ) |
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171 | { |
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172 | return (POSIX_Semaphore_Control *) _Objects_Get_by_name( |
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173 | &_POSIX_Semaphore_Information, |
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174 | name, |
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175 | name_length_p, |
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176 | error |
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177 | ); |
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178 | } |
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179 | |
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180 | #ifdef __cplusplus |
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181 | } |
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182 | #endif |
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183 | |
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184 | #endif |
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185 | /* end of include file */ |
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