source: rtems/cpukit/rtems/src/semflush.c @ e7541849

4.104.114.84.95
Last change on this file since e7541849 was e7541849, checked in by Ralf Corsepius <ralf.corsepius@…>, on Feb 4, 2005 at 3:09:39 PM

Use rtems_id for semaphores.

  • Property mode set to 100644
File size: 2.4 KB
Line 
1/*
2 *  rtems_semaphore_flush
3 *
4 *  DESCRIPTION:
5 *
6 *  This package is the implementation of the flush directive
7 *  of the Semaphore Manager.
8 *
9 *  COPYRIGHT (c) 1989-1999.
10 *  On-Line Applications Research Corporation (OAR).
11 *
12 *  The license and distribution terms for this file may be
13 *  found in the file LICENSE in this distribution or at
14 *  http://www.rtems.com/license/LICENSE.
15 *
16 *  $Id$
17 */
18
19#if HAVE_CONFIG_H
20#include "config.h"
21#endif
22
23#include <rtems/system.h>
24#include <rtems/rtems/status.h>
25#include <rtems/rtems/support.h>
26#include <rtems/rtems/attr.h>
27#include <rtems/score/isr.h>
28#include <rtems/score/object.h>
29#include <rtems/rtems/options.h>
30#include <rtems/rtems/sem.h>
31#include <rtems/score/coremutex.h>
32#include <rtems/score/coresem.h>
33#include <rtems/score/states.h>
34#include <rtems/score/thread.h>
35#include <rtems/score/threadq.h>
36#if defined(RTEMS_MULTIPROCESSING)
37#include <rtems/score/mpci.h>
38#endif
39#include <rtems/score/sysstate.h>
40
41#include <rtems/score/interr.h>
42
43/*PAGE
44 *
45 *  rtems_semaphore_flush
46 *
47 *  This directive allows a thread to flush the threads
48 *  pending on the semaphore.
49 *
50 *  Input parameters:
51 *    id         - semaphore id
52 *
53 *  Output parameters:
54 *    RTEMS_SUCCESSFUL - if successful
55 *    error code       - if unsuccessful
56 */
57
58#if defined(RTEMS_MULTIPROCESSING)
59#define SEND_OBJECT_WAS_DELETED _Semaphore_MP_Send_object_was_deleted
60#else
61#define SEND_OBJECT_WAS_DELETED NULL
62#endif
63
64rtems_status_code rtems_semaphore_flush(
65  rtems_id        id
66)
67{
68  register Semaphore_Control *the_semaphore;
69  Objects_Locations           location;
70
71  the_semaphore = _Semaphore_Get( id, &location );
72  switch ( location ) {
73
74    case OBJECTS_REMOTE:
75#if defined(RTEMS_MULTIPROCESSING)
76      _Thread_Dispatch();
77      return RTEMS_ILLEGAL_ON_REMOTE_OBJECT;
78#endif
79
80    case OBJECTS_ERROR:
81      return RTEMS_INVALID_ID;
82
83    case OBJECTS_LOCAL:
84      if ( !_Attributes_Is_counting_semaphore(the_semaphore->attribute_set) ) {
85        _CORE_mutex_Flush(
86          &the_semaphore->Core_control.mutex,
87          SEND_OBJECT_WAS_DELETED,
88          CORE_MUTEX_STATUS_UNSATISFIED_NOWAIT
89        );
90      } else {
91        _CORE_semaphore_Flush(
92          &the_semaphore->Core_control.semaphore,
93          SEND_OBJECT_WAS_DELETED,
94          CORE_SEMAPHORE_STATUS_UNSATISFIED_NOWAIT
95        );
96      }
97      _Thread_Enable_dispatch();
98      return RTEMS_SUCCESSFUL;
99  }
100
101  return RTEMS_INTERNAL_ERROR;   /* unreached - only to remove warnings */
102}
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