1 | /* |
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2 | * $Id$ |
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3 | */ |
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4 | |
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5 | #include <stdarg.h> |
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6 | |
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7 | #include <errno.h> |
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8 | #include <fcntl.h> |
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9 | #include <pthread.h> |
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10 | #include <semaphore.h> |
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11 | #include <limits.h> |
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12 | |
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13 | #include <rtems/system.h> |
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14 | #include <rtems/score/object.h> |
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15 | #include <rtems/posix/semaphore.h> |
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16 | #include <rtems/posix/time.h> |
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17 | #include <rtems/posix/seterr.h> |
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18 | |
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19 | /*PAGE |
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20 | * |
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21 | * _POSIX_Semaphore_Wait_support |
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22 | */ |
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23 | |
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24 | int _POSIX_Semaphore_Wait_support( |
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25 | sem_t *sem, |
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26 | boolean blocking, |
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27 | Watchdog_Interval timeout |
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28 | ) |
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29 | { |
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30 | register POSIX_Semaphore_Control *the_semaphore; |
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31 | Objects_Locations location; |
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32 | |
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33 | the_semaphore = _POSIX_Semaphore_Get( sem, &location ); |
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34 | switch ( location ) { |
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35 | case OBJECTS_ERROR: |
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36 | set_errno_and_return_minus_one( EINVAL ); |
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37 | case OBJECTS_REMOTE: |
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38 | _Thread_Dispatch(); |
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39 | set_errno_and_return_minus_one( EINVAL ); |
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40 | case OBJECTS_LOCAL: |
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41 | _CORE_semaphore_Seize( |
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42 | &the_semaphore->Semaphore, |
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43 | the_semaphore->Object.id, |
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44 | blocking, |
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45 | timeout |
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46 | ); |
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47 | _Thread_Enable_dispatch(); |
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48 | switch ( _Thread_Executing->Wait.return_code ) { |
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49 | case CORE_SEMAPHORE_STATUS_SUCCESSFUL: |
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50 | break; |
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51 | case CORE_SEMAPHORE_STATUS_UNSATISFIED_NOWAIT: |
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52 | set_errno_and_return_minus_one( EAGAIN ); |
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53 | case CORE_SEMAPHORE_WAS_DELETED: |
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54 | set_errno_and_return_minus_one( EAGAIN ); |
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55 | case CORE_SEMAPHORE_TIMEOUT: |
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56 | set_errno_and_return_minus_one( ETIMEDOUT ); |
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57 | break; |
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58 | case CORE_SEMAPHORE_MAXIMUM_COUNT_EXCEEDED: |
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59 | /* |
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60 | * This error can not occur since we set the maximum |
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61 | * count to the largest value the count can hold. |
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62 | */ |
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63 | break; |
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64 | } |
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65 | } |
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66 | return 0; |
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67 | } |
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