source: rtems/cpukit/posix/src/semunlink.c @ 35ee867

4.104.114.84.95
Last change on this file since 35ee867 was 35ee867, checked in by Joel Sherrill <joel.sherrill@…>, on Dec 2, 2002 at 7:15:24 PM

2002-12-02 Joel Sherrill <joel@…>

  • include/rtems/posix/timer.h, src/keygetspecific.c, src/posixtimespecsubtract.c, src/ptimer1.c, src/semunlink.c: Added casts to eliminate warnings on 16-bit targets like the h8300.
  • Property mode set to 100644
File size: 1.6 KB
Line 
1/*
2 *  $Id$
3 */
4
5#if HAVE_CONFIG_H
6#include "config.h"
7#endif
8
9#include <stdarg.h>
10
11#include <errno.h>
12#include <fcntl.h>
13#include <pthread.h>
14#include <semaphore.h>
15#include <limits.h>
16
17#include <rtems/system.h>
18#include <rtems/score/object.h>
19#include <rtems/posix/semaphore.h>
20#include <rtems/posix/time.h>
21#include <rtems/seterr.h>
22
23/*PAGE
24 *
25 *  sem_unlink
26 * 
27 *  Unlinks a named semaphore, sem_close must also be called to remove
28 *  the semaphore.
29 *
30 *  11.2.5 Remove a Named Semaphore, P1003.1b-1993, p.225
31 */
32
33int sem_unlink(
34  const char *name
35)
36{
37  int  status;
38  register POSIX_Semaphore_Control *the_semaphore;
39  sem_t                        the_semaphore_id;
40 
41  _Thread_Disable_dispatch();
42
43  status = _POSIX_Semaphore_Name_to_id( name, &the_semaphore_id );
44  if ( status != 0 ) {
45    _Thread_Enable_dispatch();
46    rtems_set_errno_and_return_minus_one( status );
47  }
48
49  /*
50   *  Don't support unlinking a remote semaphore.
51   */
52
53  if ( !_Objects_Is_local_id((Objects_Id)the_semaphore_id) ) {
54    _Thread_Enable_dispatch();
55    rtems_set_errno_and_return_minus_one( ENOSYS );
56  }
57
58  the_semaphore = (POSIX_Semaphore_Control *) _Objects_Get_local_object(
59    &_POSIX_Semaphore_Information,
60    _Objects_Get_index( the_semaphore_id )
61  );
62 
63#if defined(RTEMS_MULTIPROCESSING)
64  if ( the_semaphore->process_shared == PTHREAD_PROCESS_SHARED ) {
65    _Objects_MP_Close( &_POSIX_Semaphore_Information, the_semaphore_id );
66  }
67#endif
68
69  the_semaphore->linked = FALSE;
70  _POSIX_Semaphore_Namespace_remove( the_semaphore );
71  _POSIX_Semaphore_Delete( the_semaphore );
72
73  _Thread_Enable_dispatch();
74  return 0;
75}
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