source: rtems/c/src/exec/posix/src/sempost.c @ 799c767

4.104.114.84.95
Last change on this file since 799c767 was 799c767, checked in by Joel Sherrill <joel.sherrill@…>, on 11/02/99 at 18:00:15

Split the POSIX semaphore manager into multiple files.

  • Property mode set to 100644
File size: 1.1 KB
Line 
1/*
2 *  $Id$
3 */
4
5#include <stdarg.h>
6
7#include <errno.h>
8#include <fcntl.h>
9#include <pthread.h>
10#include <semaphore.h>
11#include <limits.h>
12
13#include <rtems/system.h>
14#include <rtems/score/object.h>
15#include <rtems/posix/semaphore.h>
16#include <rtems/posix/time.h>
17#include <rtems/posix/seterr.h>
18
19/*PAGE
20 *
21 *  11.2.7 Unlock a Semaphore, P1003.1b-1993, p.227
22 */
23
24int sem_post(
25  sem_t  *sem
26)
27{
28  register POSIX_Semaphore_Control *the_semaphore;
29  Objects_Locations                 location;
30 
31  the_semaphore = _POSIX_Semaphore_Get( sem, &location );
32  switch ( location ) {
33    case OBJECTS_ERROR:
34      set_errno_and_return_minus_one( EINVAL );
35    case OBJECTS_REMOTE:
36      _Thread_Dispatch();
37      return POSIX_MP_NOT_IMPLEMENTED();
38      set_errno_and_return_minus_one( EINVAL );
39    case OBJECTS_LOCAL:
40      _CORE_semaphore_Surrender(
41        &the_semaphore->Semaphore,
42        the_semaphore->Object.id,
43#if defined(RTEMS_MULTIPROCESSING)
44        POSIX_Semaphore_MP_support
45#else
46        NULL
47#endif
48      );
49      _Thread_Enable_dispatch();
50      return 0;
51  }
52  return POSIX_BOTTOM_REACHED();
53}
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