1 | /* |
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2 | * $Id$ |
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3 | */ |
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4 | |
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5 | #include <assert.h> |
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6 | #include <errno.h> |
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7 | #include <pthread.h> |
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8 | |
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9 | #include <rtems/system.h> |
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10 | #include <rtems/score/coremutex.h> |
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11 | #include <rtems/score/watchdog.h> |
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12 | #if defined(RTEMS_MULTIPROCESSING) |
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13 | #include <rtems/score/mpci.h> |
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14 | #endif |
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15 | #include <rtems/posix/mutex.h> |
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16 | #include <rtems/posix/priority.h> |
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17 | #include <rtems/posix/time.h> |
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18 | |
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19 | /*PAGE |
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20 | * |
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21 | * 11.3.3 Locking and Unlocking a Mutex, P1003.1c/Draft 10, p. 93 |
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22 | * |
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23 | * NOTE: P1003.4b/D8 adds pthread_mutex_timedlock(), p. 29 |
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24 | */ |
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25 | |
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26 | int pthread_mutex_unlock( |
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27 | pthread_mutex_t *mutex |
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28 | ) |
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29 | { |
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30 | register POSIX_Mutex_Control *the_mutex; |
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31 | Objects_Locations location; |
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32 | CORE_mutex_Status status; |
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33 | |
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34 | the_mutex = _POSIX_Mutex_Get( mutex, &location ); |
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35 | switch ( location ) { |
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36 | case OBJECTS_REMOTE: |
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37 | #if defined(RTEMS_MULTIPROCESSING) |
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38 | return _POSIX_Mutex_MP_Send_request_packet( |
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39 | POSIX_MUTEX_MP_RELEASE_REQUEST, |
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40 | *mutex, |
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41 | 0, /* Not used */ |
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42 | MPCI_DEFAULT_TIMEOUT |
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43 | ); |
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44 | #endif |
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45 | case OBJECTS_ERROR: |
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46 | return EINVAL; |
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47 | case OBJECTS_LOCAL: |
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48 | status = _CORE_mutex_Surrender( |
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49 | &the_mutex->Mutex, |
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50 | the_mutex->Object.id, |
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51 | #if defined(RTEMS_MULTIPROCESSING) |
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52 | POSIX_Threads_mutex_MP_support |
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53 | #else |
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54 | NULL |
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55 | #endif |
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56 | ); |
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57 | _Thread_Enable_dispatch(); |
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58 | return _POSIX_Mutex_From_core_mutex_status( status ); |
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59 | break; |
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60 | } |
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61 | return POSIX_BOTTOM_REACHED(); |
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62 | } |
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