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/semaphoreimpl.h> |
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25 | #include <rtems/seterr.h> |
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26 | |
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27 | #ifdef __cplusplus |
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28 | extern "C" { |
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29 | #endif |
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30 | |
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31 | /** |
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32 | * @brief This is a random number used to check if a semaphore object is |
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33 | * properly initialized. |
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34 | */ |
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35 | #define POSIX_SEMAPHORE_MAGIC 0x5d367fe7UL |
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36 | |
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37 | /** |
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38 | * This defines the information control block used to manage |
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39 | * this class of objects. |
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40 | */ |
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41 | extern Objects_Information _POSIX_Semaphore_Information; |
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42 | |
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43 | RTEMS_INLINE_ROUTINE POSIX_Semaphore_Control * |
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44 | _POSIX_Semaphore_Allocate_unprotected( void ) |
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45 | { |
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46 | return (POSIX_Semaphore_Control *) |
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47 | _Objects_Allocate_unprotected( &_POSIX_Semaphore_Information ); |
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48 | } |
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49 | |
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50 | /** |
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51 | * @brief POSIX Semaphore Free |
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52 | * |
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53 | * This routine frees a semaphore control block to the |
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54 | * inactive chain of free semaphore control blocks. |
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55 | */ |
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56 | RTEMS_INLINE_ROUTINE void _POSIX_Semaphore_Free ( |
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57 | POSIX_Semaphore_Control *the_semaphore |
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58 | ) |
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59 | { |
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60 | _Objects_Free( &_POSIX_Semaphore_Information, &the_semaphore->Object ); |
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61 | } |
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62 | |
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63 | RTEMS_INLINE_ROUTINE POSIX_Semaphore_Control *_POSIX_Semaphore_Get( |
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64 | sem_t *sem |
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65 | ) |
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66 | { |
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67 | return RTEMS_CONTAINER_OF( sem, POSIX_Semaphore_Control, Semaphore ); |
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68 | } |
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69 | |
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70 | RTEMS_INLINE_ROUTINE bool _POSIX_Semaphore_Is_named( const sem_t *sem ) |
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71 | { |
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72 | return sem->_Semaphore._Queue._name != NULL; |
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73 | } |
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74 | |
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75 | RTEMS_INLINE_ROUTINE bool _POSIX_Semaphore_Is_busy( const sem_t *sem ) |
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76 | { |
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77 | return sem->_Semaphore._Queue._heads != NULL; |
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78 | } |
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79 | |
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80 | RTEMS_INLINE_ROUTINE void _POSIX_Semaphore_Initialize( |
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81 | sem_t *sem, |
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82 | const char *name, |
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83 | unsigned int value |
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84 | ) |
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85 | { |
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86 | sem->_flags = (uintptr_t) sem ^ POSIX_SEMAPHORE_MAGIC; |
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87 | _Semaphore_Initialize_named( &sem->_Semaphore, name, value ); |
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88 | } |
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89 | |
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90 | RTEMS_INLINE_ROUTINE void _POSIX_Semaphore_Destroy( sem_t *sem ) |
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91 | { |
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92 | sem->_flags = 0; |
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93 | _Semaphore_Destroy( &sem->_Semaphore ); |
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94 | } |
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95 | |
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96 | /** |
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97 | * @brief POSIX Semaphore Delete |
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98 | * |
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99 | * This routine supports the sem_close and sem_unlink routines. |
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100 | */ |
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101 | void _POSIX_Semaphore_Delete( POSIX_Semaphore_Control *the_semaphore ); |
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102 | |
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103 | /** |
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104 | * @brief POSIX Semaphore Namespace Remove |
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105 | */ |
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106 | RTEMS_INLINE_ROUTINE void _POSIX_Semaphore_Namespace_remove ( |
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107 | POSIX_Semaphore_Control *the_semaphore |
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108 | ) |
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109 | { |
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110 | _Objects_Namespace_remove( |
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111 | &_POSIX_Semaphore_Information, &the_semaphore->Object ); |
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112 | } |
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113 | |
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114 | RTEMS_INLINE_ROUTINE POSIX_Semaphore_Control *_POSIX_Semaphore_Get_by_name( |
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115 | const char *name, |
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116 | size_t *name_length_p, |
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117 | Objects_Get_by_name_error *error |
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118 | ) |
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119 | { |
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120 | return (POSIX_Semaphore_Control *) _Objects_Get_by_name( |
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121 | &_POSIX_Semaphore_Information, |
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122 | name, |
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123 | name_length_p, |
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124 | error |
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125 | ); |
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126 | } |
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127 | |
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128 | #define POSIX_SEMAPHORE_VALIDATE_OBJECT( sem ) \ |
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129 | do { \ |
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130 | if ( \ |
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131 | ( sem ) == NULL \ |
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132 | || ( (uintptr_t) ( sem ) ^ POSIX_SEMAPHORE_MAGIC ) != ( sem )->_flags \ |
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133 | ) { \ |
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134 | rtems_set_errno_and_return_minus_one( EINVAL ); \ |
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135 | } \ |
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136 | } while ( 0 ) |
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137 | |
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138 | #ifdef __cplusplus |
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139 | } |
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140 | #endif |
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141 | |
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142 | #endif |
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143 | /* end of include file */ |
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