[8165b48f] | 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 <pthread.h> |
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| 7 | |
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[f4719d5a] | 8 | #include <rtems/system.h> |
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[5e9b32b] | 9 | #include <rtems/score/coremutex.h> |
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| 10 | #include <rtems/score/watchdog.h> |
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| 11 | #include <rtems/score/mpci.h> |
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| 12 | #include <rtems/posix/mutex.h> |
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| 13 | #include <rtems/posix/priority.h> |
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| 14 | #include <rtems/posix/time.h> |
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| 15 | |
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[974ff40] | 16 | /* |
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| 17 | * TEMPORARY |
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| 18 | */ |
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| 19 | |
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| 20 | void _POSIX_Mutex_MP_Send_process_packet ( |
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| 21 | POSIX_Mutex_MP_Remote_operations operation, |
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| 22 | Objects_Id mutex_id, |
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| 23 | Objects_Name name, |
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| 24 | Objects_Id proxy_id |
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| 25 | ) |
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| 26 | { |
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| 27 | (void) POSIX_MP_NOT_IMPLEMENTED(); |
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| 28 | } |
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| 29 | |
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| 30 | void _POSIX_Mutex_MP_Send_object_was_deleted ( |
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| 31 | Thread_Control *the_proxy |
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| 32 | ) |
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| 33 | { |
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| 34 | (void) POSIX_MP_NOT_IMPLEMENTED(); |
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| 35 | } |
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| 36 | |
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| 37 | int _POSIX_Mutex_MP_Send_request_packet ( |
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| 38 | POSIX_Mutex_MP_Remote_operations operation, |
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| 39 | Objects_Id mutex_id, |
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| 40 | boolean wait, /* XXX options */ |
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| 41 | Watchdog_Interval timeout |
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| 42 | ) |
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| 43 | { |
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| 44 | return POSIX_MP_NOT_IMPLEMENTED(); |
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| 45 | } |
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| 46 | |
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| 47 | /* |
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| 48 | * END OF TEMPORARY |
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| 49 | */ |
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| 50 | |
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[5e9b32b] | 51 | /*PAGE |
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| 52 | * |
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| 53 | * The default mutex attributes structure. |
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| 54 | */ |
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| 55 | |
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| 56 | const pthread_mutexattr_t _POSIX_Mutex_Default_attributes = { |
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| 57 | TRUE, /* is_initialized */ |
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| 58 | PTHREAD_PROCESS_PRIVATE, /* process_shared */ |
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| 59 | POSIX_SCHEDULER_MINIMUM_PRIORITY, /* prio_ceiling */ |
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| 60 | PTHREAD_PRIO_NONE, /* protocol */ |
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| 61 | FALSE /* recursive */ |
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| 62 | }; |
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| 63 | |
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| 64 | /*PAGE |
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| 65 | * |
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| 66 | * _POSIX_Mutex_Manager_initialization |
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| 67 | * |
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| 68 | * This routine initializes all mutex manager related data structures. |
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| 69 | * |
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| 70 | * Input parameters: |
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| 71 | * maximum_mutexes - maximum configured mutexes |
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| 72 | * |
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| 73 | * Output parameters: NONE |
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| 74 | */ |
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| 75 | |
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| 76 | void _POSIX_Mutex_Manager_initialization( |
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| 77 | unsigned32 maximum_mutexes |
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| 78 | ) |
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| 79 | { |
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| 80 | _Objects_Initialize_information( |
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| 81 | &_POSIX_Mutex_Information, |
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| 82 | OBJECTS_POSIX_MUTEXES, |
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| 83 | TRUE, |
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| 84 | maximum_mutexes, |
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| 85 | sizeof( POSIX_Mutex_Control ), |
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| 86 | FALSE, |
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| 87 | 0, |
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| 88 | FALSE |
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| 89 | ); |
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| 90 | } |
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| 91 | |
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| 92 | /*PAGE |
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| 93 | * |
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| 94 | * 11.3.1 Mutex Initialization Attributes, P1003.1c/Draft 10, p. 81 |
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| 95 | */ |
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| 96 | |
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| 97 | int pthread_mutexattr_init( |
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| 98 | pthread_mutexattr_t *attr |
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| 99 | ) |
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| 100 | { |
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| 101 | if ( !attr ) |
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| 102 | return EINVAL; |
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| 103 | |
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| 104 | *attr = _POSIX_Mutex_Default_attributes; |
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| 105 | return 0; |
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| 106 | } |
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| 107 | |
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| 108 | /*PAGE |
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| 109 | * |
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| 110 | * 11.3.1 Mutex Initialization Attributes, P1003.1c/Draft 10, p. 81 |
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| 111 | */ |
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| 112 | |
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| 113 | int pthread_mutexattr_destroy( |
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| 114 | pthread_mutexattr_t *attr |
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| 115 | ) |
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| 116 | { |
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| 117 | if ( !attr || attr->is_initialized == FALSE ) |
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| 118 | return EINVAL; |
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| 119 | |
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| 120 | attr->is_initialized = FALSE; |
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| 121 | return 0; |
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| 122 | } |
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| 123 | |
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| 124 | /*PAGE |
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| 125 | * |
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| 126 | * 11.3.1 Mutex Initialization Attributes, P1003.1c/Draft 10, p. 81 |
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| 127 | */ |
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| 128 | |
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| 129 | int pthread_mutexattr_getpshared( |
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| 130 | const pthread_mutexattr_t *attr, |
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| 131 | int *pshared |
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| 132 | ) |
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| 133 | { |
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| 134 | if ( !attr ) |
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| 135 | return EINVAL; |
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| 136 | |
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| 137 | *pshared = attr->process_shared; |
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| 138 | return 0; |
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| 139 | } |
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| 140 | |
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| 141 | /*PAGE |
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| 142 | * |
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| 143 | * 11.3.1 Mutex Initialization Attributes, P1003.1c/Draft 10, p. 81 |
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| 144 | */ |
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| 145 | |
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| 146 | int pthread_mutexattr_setpshared( |
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| 147 | pthread_mutexattr_t *attr, |
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| 148 | int pshared |
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| 149 | ) |
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| 150 | { |
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| 151 | if ( !attr ) |
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| 152 | return EINVAL; |
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| 153 | |
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[c238a218] | 154 | switch ( pshared ) { |
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| 155 | case PTHREAD_PROCESS_SHARED: |
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| 156 | case PTHREAD_PROCESS_PRIVATE: |
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| 157 | attr->process_shared = pshared; |
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| 158 | return 0; |
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| 159 | |
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| 160 | default: |
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| 161 | return EINVAL; |
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| 162 | } |
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[5e9b32b] | 163 | } |
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| 164 | |
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| 165 | /*PAGE |
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| 166 | * |
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| 167 | * 11.3.2 Initializing and Destroying a Mutex, P1003.1c/Draft 10, p. 87 |
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| 168 | * |
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| 169 | * NOTE: XXX Could be optimized so all the attribute error checking |
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| 170 | * is not performed when attr is NULL. |
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| 171 | */ |
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| 172 | |
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| 173 | int pthread_mutex_init( |
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| 174 | pthread_mutex_t *mutex, |
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| 175 | const pthread_mutexattr_t *attr |
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| 176 | ) |
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| 177 | { |
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| 178 | POSIX_Mutex_Control *the_mutex; |
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| 179 | CORE_mutex_Attributes *the_mutex_attr; |
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| 180 | const pthread_mutexattr_t *the_attr; |
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| 181 | CORE_mutex_Disciplines the_discipline; |
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| 182 | |
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| 183 | if ( attr ) the_attr = attr; |
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| 184 | else the_attr = &_POSIX_Mutex_Default_attributes; |
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| 185 | |
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| 186 | /* |
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| 187 | * XXX: Be careful about attributes when global!!! |
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| 188 | */ |
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| 189 | |
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| 190 | if ( the_attr->process_shared == PTHREAD_PROCESS_SHARED ) |
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| 191 | return POSIX_MP_NOT_IMPLEMENTED(); |
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| 192 | |
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| 193 | if ( !the_attr->is_initialized ) |
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| 194 | return EINVAL; |
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| 195 | |
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| 196 | /* |
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| 197 | * Determine the discipline of the mutex |
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| 198 | */ |
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| 199 | |
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| 200 | switch ( the_attr->protocol ) { |
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| 201 | case PTHREAD_PRIO_NONE: |
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| 202 | the_discipline = CORE_MUTEX_DISCIPLINES_FIFO; |
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| 203 | break; |
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| 204 | case PTHREAD_PRIO_INHERIT: |
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| 205 | the_discipline = CORE_MUTEX_DISCIPLINES_PRIORITY_INHERIT; |
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| 206 | break; |
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| 207 | case PTHREAD_PRIO_PROTECT: |
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| 208 | the_discipline = CORE_MUTEX_DISCIPLINES_PRIORITY_CEILING; |
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| 209 | break; |
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| 210 | default: |
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| 211 | return EINVAL; |
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| 212 | } |
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| 213 | |
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| 214 | if ( !_POSIX_Priority_Is_valid( the_attr->prio_ceiling ) ) |
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| 215 | return EINVAL; |
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| 216 | |
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| 217 | _Thread_Disable_dispatch(); |
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| 218 | |
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| 219 | the_mutex = _POSIX_Mutex_Allocate(); |
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| 220 | |
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| 221 | if ( !the_mutex ) { |
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| 222 | _Thread_Enable_dispatch(); |
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| 223 | return ENOMEM; |
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| 224 | } |
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| 225 | |
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| 226 | if ( the_attr->process_shared == PTHREAD_PROCESS_SHARED && |
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| 227 | !( _Objects_MP_Allocate_and_open( &_POSIX_Mutex_Information, 0, |
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| 228 | the_mutex->Object.id, FALSE ) ) ) { |
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| 229 | _POSIX_Mutex_Free( the_mutex ); |
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| 230 | _Thread_Enable_dispatch(); |
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| 231 | return EAGAIN; |
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| 232 | } |
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| 233 | |
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| 234 | the_mutex->process_shared = the_attr->process_shared; |
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| 235 | |
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| 236 | the_mutex_attr = &the_mutex->Mutex.Attributes; |
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| 237 | |
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| 238 | the_mutex_attr->allow_nesting = the_attr->recursive; |
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| 239 | the_mutex_attr->priority_ceiling = |
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| 240 | _POSIX_Priority_To_core( the_attr->prio_ceiling ); |
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| 241 | the_mutex_attr->discipline = the_discipline; |
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| 242 | |
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| 243 | /* |
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| 244 | * Must be initialized to unlocked. |
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| 245 | */ |
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| 246 | |
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| 247 | _CORE_mutex_Initialize( |
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| 248 | &the_mutex->Mutex, |
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| 249 | OBJECTS_POSIX_MUTEXES, |
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| 250 | the_mutex_attr, |
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| 251 | CORE_MUTEX_UNLOCKED, |
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| 252 | 0 /* XXX proxy_extract_callout */ |
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| 253 | ); |
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| 254 | |
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| 255 | _Objects_Open( &_POSIX_Mutex_Information, &the_mutex->Object, 0 ); |
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| 256 | |
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| 257 | *mutex = the_mutex->Object.id; |
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| 258 | |
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| 259 | if ( the_attr->process_shared == PTHREAD_PROCESS_SHARED ) |
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| 260 | _POSIX_Mutex_MP_Send_process_packet( |
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| 261 | POSIX_MUTEX_MP_ANNOUNCE_CREATE, |
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| 262 | the_mutex->Object.id, |
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| 263 | 0, /* Name not used */ |
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| 264 | 0 /* Not used */ |
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| 265 | ); |
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| 266 | |
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| 267 | _Thread_Enable_dispatch(); |
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| 268 | return 0; |
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| 269 | } |
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| 270 | |
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| 271 | /*PAGE |
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| 272 | * |
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| 273 | * 11.3.2 Initializing and Destroying a Mutex, P1003.1c/Draft 10, p. 87 |
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| 274 | */ |
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| 275 | |
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| 276 | int pthread_mutex_destroy( |
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| 277 | pthread_mutex_t *mutex |
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| 278 | ) |
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| 279 | { |
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| 280 | register POSIX_Mutex_Control *the_mutex; |
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| 281 | Objects_Locations location; |
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| 282 | |
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| 283 | the_mutex = _POSIX_Mutex_Get( mutex, &location ); |
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| 284 | switch ( location ) { |
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| 285 | case OBJECTS_ERROR: |
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| 286 | return EINVAL; |
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| 287 | case OBJECTS_REMOTE: |
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| 288 | _Thread_Dispatch(); |
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| 289 | return POSIX_MP_NOT_IMPLEMENTED(); |
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| 290 | return EINVAL; |
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| 291 | case OBJECTS_LOCAL: |
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| 292 | /* |
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| 293 | * XXX: There is an error for the mutex being locked |
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| 294 | * or being in use by a condition variable. |
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| 295 | */ |
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| 296 | |
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| 297 | if ( _CORE_mutex_Is_locked( &the_mutex->Mutex ) ) { |
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| 298 | _Thread_Enable_dispatch(); |
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| 299 | return EBUSY; |
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| 300 | } |
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| 301 | |
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| 302 | _Objects_Close( &_POSIX_Mutex_Information, &the_mutex->Object ); |
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| 303 | |
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| 304 | _CORE_mutex_Flush( |
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| 305 | &the_mutex->Mutex, |
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| 306 | _POSIX_Mutex_MP_Send_object_was_deleted, |
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| 307 | EINVAL |
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| 308 | ); |
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| 309 | |
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| 310 | _POSIX_Mutex_Free( the_mutex ); |
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| 311 | |
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| 312 | if ( the_mutex->process_shared == PTHREAD_PROCESS_SHARED ) { |
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| 313 | |
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| 314 | _Objects_MP_Close( &_POSIX_Mutex_Information, the_mutex->Object.id ); |
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| 315 | |
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| 316 | _POSIX_Mutex_MP_Send_process_packet( |
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| 317 | POSIX_MUTEX_MP_ANNOUNCE_DELETE, |
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| 318 | the_mutex->Object.id, |
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| 319 | 0, /* Not used */ |
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| 320 | 0 /* Not used */ |
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| 321 | ); |
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| 322 | } |
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| 323 | _Thread_Enable_dispatch(); |
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| 324 | return 0; |
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| 325 | } |
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| 326 | return POSIX_BOTTOM_REACHED(); |
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| 327 | } |
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| 328 | |
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| 329 | /* |
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| 330 | * _POSIX_Mutex_Lock_support |
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| 331 | * |
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| 332 | * A support routine which implements guts of the blocking, non-blocking, and |
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| 333 | * timed wait version of mutex lock. |
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| 334 | */ |
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| 335 | |
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| 336 | int _POSIX_Mutex_Lock_support( |
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| 337 | pthread_mutex_t *mutex, |
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| 338 | boolean blocking, |
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| 339 | Watchdog_Interval timeout |
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| 340 | ) |
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| 341 | { |
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| 342 | register POSIX_Mutex_Control *the_mutex; |
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| 343 | Objects_Locations location; |
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| 344 | |
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| 345 | the_mutex = _POSIX_Mutex_Get( mutex, &location ); |
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| 346 | switch ( location ) { |
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| 347 | case OBJECTS_ERROR: |
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| 348 | return EINVAL; |
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| 349 | case OBJECTS_REMOTE: |
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| 350 | return _POSIX_Mutex_MP_Send_request_packet( |
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| 351 | POSIX_MUTEX_MP_OBTAIN_REQUEST, |
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| 352 | *mutex, |
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| 353 | 0, /* must define the option set */ |
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| 354 | WATCHDOG_NO_TIMEOUT |
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| 355 | ); |
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| 356 | case OBJECTS_LOCAL: |
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| 357 | _CORE_mutex_Seize( |
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| 358 | &the_mutex->Mutex, |
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| 359 | the_mutex->Object.id, |
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| 360 | blocking, |
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| 361 | timeout |
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| 362 | ); |
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| 363 | _Thread_Enable_dispatch(); |
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| 364 | return _Thread_Executing->Wait.return_code; |
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| 365 | break; |
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| 366 | } |
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| 367 | return POSIX_BOTTOM_REACHED(); |
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| 368 | } |
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| 369 | |
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| 370 | /*PAGE |
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| 371 | * |
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| 372 | * 11.3.3 Locking and Unlocking a Mutex, P1003.1c/Draft 10, p. 93 |
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| 373 | * |
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| 374 | * NOTE: P1003.4b/D8 adds pthread_mutex_timedlock(), p. 29 |
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| 375 | */ |
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| 376 | |
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| 377 | int pthread_mutex_lock( |
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| 378 | pthread_mutex_t *mutex |
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| 379 | ) |
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| 380 | { |
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| 381 | return _POSIX_Mutex_Lock_support( mutex, TRUE, THREAD_QUEUE_WAIT_FOREVER ); |
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| 382 | } |
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| 383 | |
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| 384 | /*PAGE |
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| 385 | * |
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| 386 | * 11.3.3 Locking and Unlocking a Mutex, P1003.1c/Draft 10, p. 93 |
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| 387 | * |
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| 388 | * NOTE: P1003.4b/D8 adds pthread_mutex_timedlock(), p. 29 |
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| 389 | */ |
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| 390 | |
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| 391 | int pthread_mutex_trylock( |
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| 392 | pthread_mutex_t *mutex |
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| 393 | ) |
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| 394 | { |
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| 395 | return _POSIX_Mutex_Lock_support( mutex, FALSE, THREAD_QUEUE_WAIT_FOREVER ); |
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| 396 | } |
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| 397 | |
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| 398 | /*PAGE |
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| 399 | * |
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| 400 | * 11.3.3 Locking and Unlocking a Mutex, P1003.1c/Draft 10, p. 93 |
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| 401 | * |
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| 402 | * NOTE: P1003.4b/D8 adds pthread_mutex_timedlock(), p. 29 |
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| 403 | */ |
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| 404 | |
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| 405 | void POSIX_Threads_mutex_MP_support( |
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| 406 | Thread_Control *the_thread, |
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| 407 | Objects_Id id |
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| 408 | ) |
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| 409 | { |
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| 410 | (void) POSIX_MP_NOT_IMPLEMENTED(); /* XXX: should never get here */ |
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| 411 | } |
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| 412 | |
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| 413 | int pthread_mutex_unlock( |
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| 414 | pthread_mutex_t *mutex |
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| 415 | ) |
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| 416 | { |
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| 417 | register POSIX_Mutex_Control *the_mutex; |
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| 418 | Objects_Locations location; |
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| 419 | |
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| 420 | the_mutex = _POSIX_Mutex_Get( mutex, &location ); |
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| 421 | switch ( location ) { |
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| 422 | case OBJECTS_ERROR: |
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| 423 | return EINVAL; |
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| 424 | case OBJECTS_REMOTE: |
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| 425 | return _POSIX_Mutex_MP_Send_request_packet( |
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| 426 | POSIX_MUTEX_MP_RELEASE_REQUEST, |
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| 427 | *mutex, |
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| 428 | 0, /* Not used */ |
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| 429 | MPCI_DEFAULT_TIMEOUT |
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| 430 | ); |
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| 431 | case OBJECTS_LOCAL: |
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| 432 | _CORE_mutex_Surrender( |
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| 433 | &the_mutex->Mutex, |
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| 434 | the_mutex->Object.id, |
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| 435 | POSIX_Threads_mutex_MP_support |
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| 436 | ); |
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| 437 | _Thread_Enable_dispatch(); |
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| 438 | return _Thread_Executing->Wait.return_code; /* XXX return status */ |
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| 439 | break; |
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| 440 | } |
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| 441 | return POSIX_BOTTOM_REACHED(); |
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| 442 | } |
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| 443 | |
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| 444 | /*PAGE |
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| 445 | * |
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| 446 | * 11.3.3 Locking and Unlocking a Mutex, P1003.1c/Draft 10, p. 93 |
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| 447 | * |
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| 448 | * NOTE: P1003.4b/D8 adds pthread_mutex_timedlock(), p. 29 |
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| 449 | */ |
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| 450 | |
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| 451 | int pthread_mutex_timedlock( |
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| 452 | pthread_mutex_t *mutex, |
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| 453 | const struct timespec *timeout |
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| 454 | ) |
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| 455 | { |
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| 456 | return _POSIX_Mutex_Lock_support( |
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| 457 | mutex, |
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| 458 | TRUE, |
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| 459 | _POSIX_Time_Spec_to_interval( timeout ) |
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| 460 | ); |
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| 461 | } |
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| 462 | |
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| 463 | /*PAGE |
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| 464 | * |
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| 465 | * 13.6.1 Mutex Initialization Scheduling Attributes, P1003.1c/Draft 10, p. 128 |
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| 466 | */ |
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| 467 | |
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| 468 | int pthread_mutexattr_setprotocol( |
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| 469 | pthread_mutexattr_t *attr, |
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| 470 | int protocol |
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| 471 | ) |
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| 472 | { |
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| 473 | if ( !attr ) |
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| 474 | return EINVAL; |
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| 475 | |
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[c238a218] | 476 | switch ( protocol ) { |
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| 477 | case PTHREAD_PRIO_NONE: |
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| 478 | case PTHREAD_PRIO_INHERIT: |
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| 479 | case PTHREAD_PRIO_PROTECT: |
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| 480 | attr->protocol = protocol; |
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| 481 | return 0; |
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| 482 | |
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| 483 | default: |
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| 484 | return EINVAL; |
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| 485 | } |
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[5e9b32b] | 486 | } |
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| 487 | |
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| 488 | /*PAGE |
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| 489 | * |
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| 490 | * 13.6.1 Mutex Initialization Scheduling Attributes, P1003.1c/Draft 10, p. 128 |
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| 491 | */ |
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| 492 | |
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| 493 | int pthread_mutexattr_getprotocol( |
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| 494 | const pthread_mutexattr_t *attr, |
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| 495 | int *protocol |
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| 496 | ) |
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| 497 | { |
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| 498 | if ( !attr ) |
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| 499 | return EINVAL; |
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| 500 | |
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| 501 | *protocol = attr->protocol; |
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| 502 | return 0; |
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| 503 | } |
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| 504 | |
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| 505 | /*PAGE |
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| 506 | * |
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| 507 | * 13.6.1 Mutex Initialization Scheduling Attributes, P1003.1c/Draft 10, p. 128 |
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| 508 | */ |
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| 509 | |
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| 510 | int pthread_mutexattr_setprioceiling( |
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| 511 | pthread_mutexattr_t *attr, |
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| 512 | int prioceiling |
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| 513 | ) |
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| 514 | { |
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| 515 | if ( !attr ) |
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| 516 | return EINVAL; |
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| 517 | |
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| 518 | if ( !_POSIX_Priority_Is_valid( attr->prio_ceiling ) ) |
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| 519 | return EINVAL; |
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| 520 | |
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| 521 | attr->prio_ceiling = prioceiling; |
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| 522 | return 0; |
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| 523 | } |
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| 524 | |
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| 525 | /*PAGE |
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| 526 | * |
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| 527 | * 13.6.1 Mutex Initialization Scheduling Attributes, P1003.1c/Draft 10, p. 128 |
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| 528 | */ |
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| 529 | |
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| 530 | int pthread_mutexattr_getprioceiling( |
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| 531 | const pthread_mutexattr_t *attr, |
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| 532 | int *prioceiling |
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| 533 | ) |
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| 534 | { |
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| 535 | if ( !attr ) |
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| 536 | return EINVAL; |
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| 537 | |
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| 538 | *prioceiling = attr->prio_ceiling; |
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| 539 | return 0; |
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| 540 | } |
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| 541 | |
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| 542 | /*PAGE |
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| 543 | * |
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| 544 | * 13.6.2 Change the Priority Ceiling of a Mutex, P1003.1c/Draft 10, p. 131 |
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| 545 | */ |
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| 546 | |
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| 547 | int pthread_mutex_setprioceiling( |
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| 548 | pthread_mutex_t *mutex, |
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| 549 | int prioceiling, |
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| 550 | int *old_ceiling |
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| 551 | ) |
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| 552 | { |
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| 553 | register POSIX_Mutex_Control *the_mutex; |
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| 554 | Objects_Locations location; |
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| 555 | Priority_Control the_priority; |
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| 556 | int status; |
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| 557 | |
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| 558 | if ( !_POSIX_Priority_Is_valid( prioceiling ) ) |
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| 559 | return EINVAL; |
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| 560 | |
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| 561 | the_priority = _POSIX_Priority_To_core( prioceiling ); |
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| 562 | |
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| 563 | /* |
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| 564 | * Must acquire the mutex before we can change it's ceiling |
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| 565 | */ |
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| 566 | |
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| 567 | status = pthread_mutex_lock( mutex ); |
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| 568 | if ( status ) |
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| 569 | return status; |
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| 570 | |
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| 571 | the_mutex = _POSIX_Mutex_Get( mutex, &location ); |
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| 572 | switch ( location ) { |
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| 573 | case OBJECTS_ERROR: |
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| 574 | return EINVAL; |
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| 575 | case OBJECTS_REMOTE: |
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| 576 | return POSIX_MP_NOT_IMPLEMENTED(); /* XXX feels questionable */ |
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| 577 | return EINVAL; |
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| 578 | case OBJECTS_LOCAL: |
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| 579 | the_mutex->Mutex.Attributes.priority_ceiling = the_priority; |
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| 580 | _CORE_mutex_Surrender( |
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| 581 | &the_mutex->Mutex, |
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| 582 | the_mutex->Object.id, |
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| 583 | POSIX_Threads_mutex_MP_support |
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| 584 | ); |
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| 585 | _Thread_Enable_dispatch(); |
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| 586 | return 0; |
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| 587 | } |
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| 588 | return POSIX_BOTTOM_REACHED(); |
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| 589 | } |
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| 590 | |
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| 591 | /*PAGE |
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| 592 | * |
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| 593 | * 13.6.2 Change the Priority Ceiling of a Mutex, P1003.1c/Draft 10, p. 131 |
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| 594 | */ |
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| 595 | |
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| 596 | int pthread_mutex_getprioceiling( |
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| 597 | pthread_mutex_t *mutex, |
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| 598 | int *prioceiling |
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| 599 | ) |
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| 600 | { |
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| 601 | register POSIX_Mutex_Control *the_mutex; |
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| 602 | Objects_Locations location; |
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| 603 | |
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| 604 | the_mutex = _POSIX_Mutex_Get( mutex, &location ); |
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| 605 | switch ( location ) { |
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| 606 | case OBJECTS_ERROR: |
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| 607 | return EINVAL; |
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| 608 | case OBJECTS_REMOTE: |
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| 609 | return POSIX_MP_NOT_IMPLEMENTED(); /* XXX feels questionable */ |
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| 610 | case OBJECTS_LOCAL: |
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| 611 | *prioceiling = _POSIX_Priority_From_core( |
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| 612 | the_mutex->Mutex.Attributes.priority_ceiling |
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| 613 | ); |
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| 614 | _Thread_Enable_dispatch(); |
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| 615 | return 0; |
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| 616 | } |
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| 617 | return POSIX_BOTTOM_REACHED(); |
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| 618 | } |
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