[7f72217e] | 1 | /* |
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[eb5a7e07] | 2 | * $Id$ |
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[5e9b32b] | 3 | */ |
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| 4 | |
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| 5 | #include <errno.h> |
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| 6 | #include <limits.h> |
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| 7 | #include <pthread.h> |
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| 8 | #include <string.h> |
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| 9 | |
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[f4719d5a] | 10 | #include <rtems/system.h> |
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[5e9b32b] | 11 | #include <rtems/score/thread.h> |
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| 12 | #include <rtems/score/wkspace.h> |
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| 13 | #include <rtems/posix/key.h> |
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| 14 | |
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| 15 | /* |
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| 16 | * _POSIX_Key_Manager_initialization |
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| 17 | * |
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| 18 | * DESCRIPTION: |
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| 19 | * |
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| 20 | * This routine performs the initialization necessary for this manager. |
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| 21 | */ |
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| 22 | |
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| 23 | void _POSIX_Key_Manager_initialization( |
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| 24 | unsigned32 maximum_keys |
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| 25 | ) |
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| 26 | { |
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| 27 | _Objects_Initialize_information( |
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| 28 | &_POSIX_Keys_Information, |
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| 29 | OBJECTS_POSIX_KEYS, |
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| 30 | FALSE, |
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| 31 | maximum_keys, |
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| 32 | sizeof( POSIX_Keys_Control ), |
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| 33 | FALSE, |
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| 34 | 0, |
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| 35 | FALSE |
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| 36 | ); |
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| 37 | } |
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| 38 | |
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| 39 | /*PAGE |
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| 40 | * |
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| 41 | * 17.1.1 Thread-Specific Data Key Create, P1003.1c/Draft 10, p. 163 |
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| 42 | */ |
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| 43 | |
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| 44 | int pthread_key_create( |
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| 45 | pthread_key_t *key, |
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| 46 | void (*destructor)( void * ) |
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| 47 | ) |
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| 48 | { |
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| 49 | POSIX_Keys_Control *the_key; |
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| 50 | void *table; |
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| 51 | unsigned32 the_class; |
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| 52 | unsigned32 bytes_to_allocate; |
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| 53 | |
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| 54 | |
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| 55 | _Thread_Disable_dispatch(); |
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| 56 | |
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| 57 | the_key = _POSIX_Keys_Allocate(); |
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| 58 | |
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| 59 | if ( !the_key ) { |
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| 60 | _Thread_Enable_dispatch(); |
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| 61 | return EAGAIN; |
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| 62 | } |
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| 63 | |
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| 64 | the_key->destructor = destructor; |
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| 65 | |
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| 66 | for ( the_class = OBJECTS_CLASSES_FIRST_THREAD_CLASS; |
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| 67 | the_class <= OBJECTS_CLASSES_LAST_THREAD_CLASS; |
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| 68 | the_class++ ) { |
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| 69 | |
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| 70 | bytes_to_allocate = |
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| 71 | (_Objects_Information_table[ the_class ]->maximum + 1) * sizeof( void * ); |
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| 72 | |
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| 73 | table = _Workspace_Allocate( bytes_to_allocate ); |
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| 74 | |
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| 75 | if ( !table ) { |
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| 76 | for ( --the_class; |
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| 77 | the_class >= OBJECTS_CLASSES_FIRST_THREAD_CLASS; |
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| 78 | the_class-- ) |
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| 79 | _Workspace_Free( the_key->Values[ the_class ] ); |
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| 80 | |
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| 81 | _POSIX_Keys_Free( the_key ); |
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| 82 | _Thread_Enable_dispatch(); |
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| 83 | return ENOMEM; |
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| 84 | } |
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| 85 | |
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| 86 | the_key->Values[ the_class ] = table; |
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| 87 | memset( table, '\0', bytes_to_allocate ); |
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| 88 | } |
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| 89 | |
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| 90 | the_key->is_active = TRUE; |
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| 91 | |
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| 92 | _Objects_Open( &_POSIX_Keys_Information, &the_key->Object, 0 ); |
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| 93 | |
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| 94 | *key = the_key->Object.id; |
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| 95 | |
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| 96 | _Thread_Enable_dispatch(); |
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| 97 | |
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| 98 | return 0; |
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| 99 | } |
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| 100 | |
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| 101 | /*PAGE |
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| 102 | * |
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| 103 | * 17.1.2 Thread-Specific Data Management, P1003.1c/Draft 10, p. 165 |
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| 104 | */ |
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| 105 | |
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| 106 | int pthread_setspecific( |
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| 107 | pthread_key_t key, |
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| 108 | const void *value |
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| 109 | ) |
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| 110 | { |
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| 111 | register POSIX_Keys_Control *the_key; |
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| 112 | unsigned32 index; |
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| 113 | unsigned32 class; |
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| 114 | Objects_Locations location; |
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| 115 | |
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| 116 | the_key = _POSIX_Keys_Get( key, &location ); |
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| 117 | switch ( location ) { |
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| 118 | case OBJECTS_ERROR: |
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| 119 | return EINVAL; |
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| 120 | case OBJECTS_REMOTE: |
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| 121 | return EINVAL; /* should never happen */ |
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| 122 | case OBJECTS_LOCAL: |
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| 123 | index = _Objects_Get_index( _Thread_Executing->Object.id ); |
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| 124 | class = _Objects_Get_class( _Thread_Executing->Object.id ); |
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| 125 | the_key->Values[ class ][ index ] = (void *) value; |
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[b521ae2] | 126 | _Thread_Enable_dispatch(); |
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[5e9b32b] | 127 | return 0; |
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| 128 | } |
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| 129 | return POSIX_BOTTOM_REACHED(); |
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| 130 | } |
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| 131 | |
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| 132 | /*PAGE |
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| 133 | * |
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| 134 | * 17.1.2 Thread-Specific Data Management, P1003.1c/Draft 10, p. 165 |
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| 135 | */ |
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| 136 | |
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| 137 | void *pthread_getspecific( |
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| 138 | pthread_key_t key |
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| 139 | ) |
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| 140 | { |
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| 141 | register POSIX_Keys_Control *the_key; |
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| 142 | unsigned32 index; |
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| 143 | unsigned32 class; |
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| 144 | Objects_Locations location; |
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[b521ae2] | 145 | void *key_data; |
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[5e9b32b] | 146 | |
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| 147 | the_key = _POSIX_Keys_Get( key, &location ); |
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| 148 | switch ( location ) { |
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| 149 | case OBJECTS_ERROR: |
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| 150 | return NULL; |
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| 151 | case OBJECTS_REMOTE: |
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| 152 | return 0; /* should never happen */ |
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| 153 | case OBJECTS_LOCAL: |
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| 154 | index = _Objects_Get_index( _Thread_Executing->Object.id ); |
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| 155 | class = _Objects_Get_class( _Thread_Executing->Object.id ); |
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[b521ae2] | 156 | key_data = (void *) the_key->Values[ class ][ index ]; |
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| 157 | _Thread_Enable_dispatch(); |
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| 158 | return key_data; |
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[5e9b32b] | 159 | } |
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| 160 | return (void *) POSIX_BOTTOM_REACHED(); |
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| 161 | } |
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| 162 | |
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| 163 | /*PAGE |
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| 164 | * |
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| 165 | * 17.1.3 Thread-Specific Data Key Deletion, P1003.1c/Draft 10, p. 167 |
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| 166 | */ |
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| 167 | |
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| 168 | int pthread_key_delete( |
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| 169 | pthread_key_t key |
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| 170 | ) |
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| 171 | { |
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| 172 | register POSIX_Keys_Control *the_key; |
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| 173 | Objects_Locations location; |
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| 174 | unsigned32 the_class; |
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| 175 | |
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| 176 | the_key = _POSIX_Keys_Get( key, &location ); |
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| 177 | switch ( location ) { |
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| 178 | case OBJECTS_ERROR: |
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| 179 | return EINVAL; |
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| 180 | case OBJECTS_REMOTE: |
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| 181 | return 0; /* should never happen */ |
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| 182 | case OBJECTS_LOCAL: |
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| 183 | _Objects_Close( &_POSIX_Keys_Information, &the_key->Object ); |
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| 184 | |
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| 185 | the_key->is_active = FALSE; |
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| 186 | |
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| 187 | for ( the_class = OBJECTS_CLASSES_FIRST_THREAD_CLASS; |
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| 188 | the_class <= OBJECTS_CLASSES_LAST_THREAD_CLASS; |
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| 189 | the_class++ ) |
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| 190 | _Workspace_Free( the_key->Values[ the_class ] ); |
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| 191 | |
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| 192 | /* |
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| 193 | * NOTE: The destructor is not called and it is the responsibility |
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| 194 | * of the application to free the memory. |
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| 195 | */ |
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| 196 | |
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| 197 | _POSIX_Keys_Free( the_key ); |
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[b521ae2] | 198 | _Thread_Enable_dispatch(); |
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[5e9b32b] | 199 | return 0; |
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| 200 | } |
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| 201 | return POSIX_BOTTOM_REACHED(); |
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| 202 | } |
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| 203 | |
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| 204 | /*PAGE |
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| 205 | * |
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| 206 | * _POSIX_Keys_Run_destructors |
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| 207 | * |
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| 208 | * 17.1.1 Thread-Specific Data Key Create, P1003.1c/Draft 10, p. 163 |
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| 209 | * |
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| 210 | * NOTE: This is the routine executed when a thread exits to |
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| 211 | * run through all the keys and do the destructor action. |
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| 212 | */ |
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| 213 | |
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| 214 | void _POSIX_Keys_Run_destructors( |
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| 215 | Thread_Control *thread |
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| 216 | ) |
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| 217 | { |
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| 218 | unsigned32 index; |
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| 219 | unsigned32 pthread_index; |
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| 220 | unsigned32 pthread_class; |
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| 221 | unsigned32 iterations; |
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| 222 | boolean are_all_null; |
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| 223 | POSIX_Keys_Control *the_key; |
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| 224 | void *value; |
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| 225 | |
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| 226 | pthread_index = _Objects_Get_index( thread->Object.id ); |
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| 227 | pthread_class = _Objects_Get_class( thread->Object.id ); |
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| 228 | |
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| 229 | iterations = 0; |
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| 230 | |
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| 231 | for ( ; ; ) { |
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| 232 | |
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| 233 | are_all_null = TRUE; |
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| 234 | |
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| 235 | for ( index=1 ; index <= _POSIX_Keys_Information.maximum ; index++ ) { |
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| 236 | |
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| 237 | the_key = (POSIX_Keys_Control *) |
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| 238 | _POSIX_Keys_Information.local_table[ index ]; |
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| 239 | |
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| 240 | if ( the_key && the_key->is_active && the_key->destructor ) { |
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| 241 | value = the_key->Values[ pthread_class ][ pthread_index ]; |
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| 242 | if ( value ) { |
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| 243 | (*the_key->destructor)( value ); |
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| 244 | if ( the_key->Values[ pthread_class ][ pthread_index ] ) |
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| 245 | are_all_null = FALSE; |
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| 246 | } |
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| 247 | } |
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| 248 | } |
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| 249 | |
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| 250 | if ( are_all_null == TRUE ) |
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| 251 | return; |
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| 252 | |
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| 253 | iterations++; |
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| 254 | |
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| 255 | /* |
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| 256 | * The standard allows one to not do this and thus go into an infinite |
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| 257 | * loop. It seems rude to unnecessarily lock up a system. |
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[895efd9] | 258 | * |
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| 259 | * Reference: 17.1.1.2 P1003.1c/Draft 10, p. 163, line 99. |
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[5e9b32b] | 260 | */ |
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| 261 | |
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| 262 | if ( iterations >= PTHREAD_DESTRUCTOR_ITERATIONS ) |
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| 263 | return; |
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| 264 | } |
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| 265 | } |
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