1 | /* |
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2 | * $Id$ |
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3 | */ |
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4 | |
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5 | #if HAVE_CONFIG_H |
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6 | #include "config.h" |
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7 | #endif |
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8 | |
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9 | #include <stdarg.h> |
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10 | |
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11 | #include <errno.h> |
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12 | #include <fcntl.h> |
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13 | #include <pthread.h> |
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14 | #include <semaphore.h> |
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15 | #include <limits.h> |
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16 | |
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17 | #include <rtems/system.h> |
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18 | #include <rtems/score/object.h> |
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19 | #include <rtems/posix/semaphore.h> |
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20 | #include <rtems/posix/time.h> |
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21 | #include <rtems/seterr.h> |
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22 | |
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23 | /*PAGE |
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24 | * |
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25 | * sem_unlink |
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26 | * |
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27 | * Unlinks a named semaphore, sem_close must also be called to remove |
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28 | * the semaphore. |
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29 | * |
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30 | * 11.2.5 Remove a Named Semaphore, P1003.1b-1993, p.225 |
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31 | */ |
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32 | |
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33 | int sem_unlink( |
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34 | const char *name |
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35 | ) |
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36 | { |
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37 | int status; |
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38 | register POSIX_Semaphore_Control *the_semaphore; |
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39 | sem_t the_semaphore_id; |
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40 | |
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41 | _Thread_Disable_dispatch(); |
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42 | |
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43 | status = _POSIX_Semaphore_Name_to_id( name, &the_semaphore_id ); |
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44 | if ( status != 0 ) { |
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45 | _Thread_Enable_dispatch(); |
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46 | rtems_set_errno_and_return_minus_one( status ); |
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47 | } |
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48 | |
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49 | /* |
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50 | * Don't support unlinking a remote semaphore. |
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51 | */ |
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52 | |
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53 | #if defined(RTEMS_MULTIPROCESSING) |
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54 | if ( !_Objects_Is_local_id((Objects_Id)the_semaphore_id) ) { |
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55 | _Thread_Enable_dispatch(); |
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56 | rtems_set_errno_and_return_minus_one( ENOSYS ); |
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57 | } |
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58 | #endif |
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59 | |
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60 | the_semaphore = (POSIX_Semaphore_Control *) _Objects_Get_local_object( |
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61 | &_POSIX_Semaphore_Information, |
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62 | _Objects_Get_index( the_semaphore_id ) |
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63 | ); |
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64 | |
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65 | #if defined(RTEMS_MULTIPROCESSING) |
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66 | if ( the_semaphore->process_shared == PTHREAD_PROCESS_SHARED ) { |
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67 | _Objects_MP_Close( &_POSIX_Semaphore_Information, the_semaphore_id ); |
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68 | } |
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69 | #endif |
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70 | |
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71 | the_semaphore->linked = FALSE; |
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72 | _POSIX_Semaphore_Namespace_remove( the_semaphore ); |
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73 | _POSIX_Semaphore_Delete( the_semaphore ); |
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74 | |
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75 | _Thread_Enable_dispatch(); |
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76 | return 0; |
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77 | } |
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