source: rtems/cpukit/posix/src/semunlink.c @ f26145b

4.104.114.84.95
Last change on this file since f26145b was 209e68df, checked in by Joel Sherrill <joel.sherrill@…>, on 11/02/04 at 17:21:16

2004-11-02 Joel Sherrill <joel@…>

  • posix/src/mqueueunlink.c, posix/src/semunlink.c, score/inline/rtems/score/object.inl, score/macros/rtems/score/object.inl: _Objects_Is_local_id() should be avoided in single CPU configurations but always available in the Objects Handlers API.
  • 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 defined(RTEMS_MULTIPROCESSING)
54  if ( !_Objects_Is_local_id((Objects_Id)the_semaphore_id) ) {
55    _Thread_Enable_dispatch();
56    rtems_set_errno_and_return_minus_one( ENOSYS );
57  }
58#endif
59
60  the_semaphore = (POSIX_Semaphore_Control *) _Objects_Get_local_object(
61    &_POSIX_Semaphore_Information,
62    _Objects_Get_index( the_semaphore_id )
63  );
64
65#if defined(RTEMS_MULTIPROCESSING)
66  if ( the_semaphore->process_shared == PTHREAD_PROCESS_SHARED ) {
67    _Objects_MP_Close( &_POSIX_Semaphore_Information, the_semaphore_id );
68  }
69#endif
70
71  the_semaphore->linked = FALSE;
72  _POSIX_Semaphore_Namespace_remove( the_semaphore );
73  _POSIX_Semaphore_Delete( the_semaphore );
74
75  _Thread_Enable_dispatch();
76  return 0;
77}
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