5
Last change
on this file since 127c20eb was
2581a56,
checked in by Sebastian Huber <sebastian.huber@…>, on 05/20/16 at 19:39:56
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score: Add semaphore variants
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Property mode set to
100644
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File size:
1008 bytes
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1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Unlock a Semaphore |
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5 | * @ingroup POSIX_SEMAPHORE |
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6 | */ |
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7 | |
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8 | /* |
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9 | * COPYRIGHT (c) 1989-2014. |
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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.org/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 <semaphore.h> |
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22 | #include <limits.h> |
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23 | |
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24 | #include <rtems/posix/semaphoreimpl.h> |
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25 | #include <rtems/posix/posixapi.h> |
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26 | |
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27 | int sem_post( |
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28 | sem_t *sem |
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29 | ) |
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30 | { |
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31 | POSIX_Semaphore_Control *the_semaphore; |
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32 | Thread_queue_Context queue_context; |
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33 | Status_Control status; |
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34 | |
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35 | the_semaphore = _POSIX_Semaphore_Get( sem, &queue_context ); |
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36 | |
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37 | if ( the_semaphore == NULL ) { |
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38 | rtems_set_errno_and_return_minus_one( EINVAL ); |
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39 | } |
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40 | |
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41 | status = _CORE_semaphore_Surrender( |
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42 | &the_semaphore->Semaphore, |
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43 | POSIX_SEMAPHORE_TQ_OPERATIONS, |
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44 | SEM_VALUE_MAX, |
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45 | &queue_context |
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46 | ); |
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47 | return _POSIX_Zero_or_minus_one_plus_errno( status ); |
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48 | } |
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