1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Locking and Unlocking a Mutex |
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5 | * @ingroup POSIXAPI |
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6 | */ |
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7 | |
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8 | /* |
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9 | * COPYRIGHT (c) 1989-2007. |
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10 | * On-Line Applications Research Corporation (OAR). |
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11 | * |
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12 | * The license and distribution terms for this file may be |
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13 | * found in the file LICENSE in this distribution or at |
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14 | * http://www.rtems.com/license/LICENSE. |
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15 | */ |
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16 | |
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17 | #if HAVE_CONFIG_H |
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18 | #include "config.h" |
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19 | #endif |
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20 | |
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21 | #include <errno.h> |
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22 | #include <pthread.h> |
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23 | |
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24 | #include <rtems/system.h> |
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25 | #include <rtems/score/coremuteximpl.h> |
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26 | #include <rtems/score/watchdog.h> |
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27 | #if defined(RTEMS_MULTIPROCESSING) |
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28 | #include <rtems/score/mpci.h> |
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29 | #endif |
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30 | #include <rtems/posix/muteximpl.h> |
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31 | #include <rtems/posix/priorityimpl.h> |
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32 | #include <rtems/posix/time.h> |
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33 | |
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34 | /* |
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35 | * 11.3.3 Locking and Unlocking a Mutex, P1003.1c/Draft 10, p. 93 |
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36 | * |
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37 | * NOTE: P1003.4b/D8 adds pthread_mutex_timedlock(), p. 29 |
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38 | */ |
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39 | |
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40 | int pthread_mutex_unlock( |
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41 | pthread_mutex_t *mutex |
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42 | ) |
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43 | { |
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44 | register POSIX_Mutex_Control *the_mutex; |
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45 | Objects_Locations location; |
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46 | CORE_mutex_Status status; |
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47 | |
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48 | the_mutex = _POSIX_Mutex_Get( mutex, &location ); |
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49 | switch ( location ) { |
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50 | |
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51 | case OBJECTS_LOCAL: |
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52 | status = _CORE_mutex_Surrender( |
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53 | &the_mutex->Mutex, |
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54 | the_mutex->Object.id, |
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55 | NULL |
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56 | ); |
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57 | _Objects_Put( &the_mutex->Object ); |
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58 | return _POSIX_Mutex_Translate_core_mutex_return_code( status ); |
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59 | |
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60 | #if defined(RTEMS_MULTIPROCESSING) |
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61 | case OBJECTS_REMOTE: |
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62 | #endif |
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63 | case OBJECTS_ERROR: |
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64 | break; |
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65 | } |
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66 | |
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67 | return EINVAL; |
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68 | } |
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