source: rtems/cpukit/rtems/src/semrelease.c @ 6b4518aa

4.104.114.84.95
Last change on this file since 6b4518aa was 277cc95, checked in by Joel Sherrill <joel.sherrill@…>, on 09/04/03 at 18:54:32

2003-09-04 Joel Sherrill <joel@…>

  • include/rtems.h, include/rtems/rtems/asr.h, include/rtems/rtems/attr.h, include/rtems/rtems/cache.h, include/rtems/rtems/clock.h, include/rtems/rtems/config.h, include/rtems/rtems/dpmem.h, include/rtems/rtems/event.h, include/rtems/rtems/eventmp.h, include/rtems/rtems/eventset.h, include/rtems/rtems/intr.h, include/rtems/rtems/message.h, include/rtems/rtems/modes.h, include/rtems/rtems/mp.h, include/rtems/rtems/msgmp.h, include/rtems/rtems/options.h, include/rtems/rtems/part.h, include/rtems/rtems/partmp.h, include/rtems/rtems/ratemon.h, include/rtems/rtems/region.h, include/rtems/rtems/regionmp.h, include/rtems/rtems/rtemsapi.h, include/rtems/rtems/sem.h, include/rtems/rtems/semmp.h, include/rtems/rtems/signal.h, include/rtems/rtems/signalmp.h, include/rtems/rtems/status.h, include/rtems/rtems/support.h, include/rtems/rtems/taskmp.h, include/rtems/rtems/tasks.h, include/rtems/rtems/timer.h, include/rtems/rtems/types.h, inline/rtems/rtems/asr.inl, inline/rtems/rtems/attr.inl, inline/rtems/rtems/dpmem.inl, inline/rtems/rtems/event.inl, inline/rtems/rtems/eventset.inl, inline/rtems/rtems/message.inl, inline/rtems/rtems/modes.inl, inline/rtems/rtems/options.inl, inline/rtems/rtems/part.inl, inline/rtems/rtems/ratemon.inl, inline/rtems/rtems/region.inl, inline/rtems/rtems/sem.inl, inline/rtems/rtems/status.inl, inline/rtems/rtems/support.inl, inline/rtems/rtems/tasks.inl, inline/rtems/rtems/timer.inl, macros/rtems/rtems/asr.inl, macros/rtems/rtems/attr.inl, macros/rtems/rtems/dpmem.inl, macros/rtems/rtems/event.inl, macros/rtems/rtems/eventset.inl, macros/rtems/rtems/message.inl, macros/rtems/rtems/modes.inl, macros/rtems/rtems/options.inl, macros/rtems/rtems/part.inl, macros/rtems/rtems/ratemon.inl, macros/rtems/rtems/region.inl, macros/rtems/rtems/sem.inl, macros/rtems/rtems/status.inl, macros/rtems/rtems/support.inl, macros/rtems/rtems/tasks.inl, macros/rtems/rtems/timer.inl, src/attr.c, src/clockget.c, src/clockset.c, src/clocktick.c, src/dpmem.c, src/dpmemcreate.c, src/dpmemdelete.c, src/dpmemexternal2internal.c, src/dpmemident.c, src/dpmeminternal2external.c, src/event.c, src/eventmp.c, src/eventreceive.c, src/eventseize.c, src/eventsend.c, src/eventsurrender.c, src/eventtimeout.c, src/intr.c, src/intrbody.c, src/intrcatch.c, src/mp.c, src/msg.c, src/msgmp.c, src/msgqallocate.c, src/msgqbroadcast.c, src/msgqcreate.c, src/msgqdelete.c, src/msgqflush.c, src/msgqgetnumberpending.c, src/msgqident.c, src/msgqreceive.c, src/msgqsend.c, src/msgqsubmit.c, src/msgqtranslatereturncode.c, src/msgqurgent.c, src/part.c, src/partcreate.c, src/partdelete.c, src/partgetbuffer.c, src/partident.c, src/partmp.c, src/partreturnbuffer.c, src/ratemon.c, src/ratemoncancel.c, src/ratemoncreate.c, src/ratemondelete.c, src/ratemongetstatus.c, src/ratemonident.c, src/ratemonperiod.c, src/ratemontimeout.c, src/region.c, src/regioncreate.c, src/regiondelete.c, src/regionextend.c, src/regiongetinfo.c, src/regiongetsegment.c, src/regiongetsegmentsize.c, src/regionident.c, src/regionmp.c, src/regionreturnsegment.c, src/rtclock.c, src/rtemsidtoname.c, src/rtemstimer.c, src/sem.c, src/semcreate.c, src/semdelete.c, src/semflush.c, src/semident.c, src/semmp.c, src/semobtain.c, src/semrelease.c, src/semtranslatereturncode.c, src/signal.c, src/signalcatch.c, src/signalmp.c, src/signalsend.c, src/taskcreate.c, src/taskdelete.c, src/taskgetnote.c, src/taskident.c, src/taskinitusers.c, src/taskissuspended.c, src/taskmode.c, src/taskmp.c, src/taskrestart.c, src/taskresume.c, src/tasks.c, src/tasksetnote.c, src/tasksetpriority.c, src/taskstart.c, src/tasksuspend.c, src/taskvariableadd.c, src/taskvariabledelete.c, src/taskvariableget.c, src/taskwakeafter.c, src/taskwakewhen.c, src/timercancel.c, src/timercreate.c, src/timerdelete.c, src/timerfireafter.c, src/timerfirewhen.c, src/timergetinfo.c, src/timerident.c, src/timerreset.c, src/timerserver.c, src/timerserverfireafter.c, src/timerserverfirewhen.c: URL for license changed.
  • Property mode set to 100644
File size: 2.9 KB
Line 
1/*
2 *  Semaphore Manager
3 *
4 *  DESCRIPTION:
5 *
6 *  This package is the implementation of the Semaphore Manager.
7 *  This manager utilizes standard Dijkstra counting semaphores to provide
8 *  synchronization and mutual exclusion capabilities.
9 *
10 *  Directives provided are:
11 *
12 *     + create a semaphore
13 *     + get an ID of a semaphore
14 *     + delete a semaphore
15 *     + acquire a semaphore
16 *     + release a semaphore
17 *
18 *  COPYRIGHT (c) 1989-1999.
19 *  On-Line Applications Research Corporation (OAR).
20 *
21 *  The license and distribution terms for this file may be
22 *  found in the file LICENSE in this distribution or at
23 *  http://www.rtems.com/license/LICENSE.
24 *
25 *  $Id$
26 */
27
28#include <rtems/system.h>
29#include <rtems/rtems/status.h>
30#include <rtems/rtems/support.h>
31#include <rtems/rtems/attr.h>
32#include <rtems/score/isr.h>
33#include <rtems/score/object.h>
34#include <rtems/rtems/options.h>
35#include <rtems/rtems/sem.h>
36#include <rtems/score/coremutex.h>
37#include <rtems/score/coresem.h>
38#include <rtems/score/states.h>
39#include <rtems/score/thread.h>
40#include <rtems/score/threadq.h>
41#if defined(RTEMS_MULTIPROCESSING)
42#include <rtems/score/mpci.h>
43#endif
44#include <rtems/score/sysstate.h>
45
46#include <rtems/score/interr.h>
47
48/*PAGE
49 *
50 *  rtems_semaphore_release
51 *
52 *  This directive allows a thread to release a semaphore.
53 *
54 *  Input parameters:
55 *    id - semaphore id
56 *
57 *  Output parameters:
58 *    RTEMS_SUCCESSFUL - if successful
59 *    error code        - if unsuccessful
60 */
61
62#if defined(RTEMS_MULTIPROCESSING)
63#define MUTEX_MP_SUPPORT _Semaphore_Core_mutex_mp_support
64#else
65#define MUTEX_MP_SUPPORT NULL
66#endif
67
68rtems_status_code rtems_semaphore_release(
69  Objects_Id id
70)
71{
72  register Semaphore_Control *the_semaphore;
73  Objects_Locations           location;
74  CORE_mutex_Status           mutex_status;
75  CORE_semaphore_Status       semaphore_status;
76
77  the_semaphore = _Semaphore_Get( id, &location );
78  switch ( location ) {
79
80    case OBJECTS_REMOTE:
81#if defined(RTEMS_MULTIPROCESSING)
82      return _Semaphore_MP_Send_request_packet(
83        SEMAPHORE_MP_RELEASE_REQUEST,
84        id,
85        0,                               /* Not used */
86        MPCI_DEFAULT_TIMEOUT
87      );
88#endif
89
90    case OBJECTS_ERROR:
91      return RTEMS_INVALID_ID;
92
93    case OBJECTS_LOCAL:
94      if ( !_Attributes_Is_counting_semaphore(the_semaphore->attribute_set) ) {
95        mutex_status = _CORE_mutex_Surrender(
96          &the_semaphore->Core_control.mutex,
97          id,
98          MUTEX_MP_SUPPORT
99        );
100        _Thread_Enable_dispatch();
101        return _Semaphore_Translate_core_mutex_return_code( mutex_status );
102      } else {
103        semaphore_status = _CORE_semaphore_Surrender(
104          &the_semaphore->Core_control.semaphore,
105          id,
106          MUTEX_MP_SUPPORT
107        );
108        _Thread_Enable_dispatch();
109        return
110          _Semaphore_Translate_core_semaphore_return_code( semaphore_status );
111      }
112  }
113
114  return RTEMS_INTERNAL_ERROR;   /* unreached - only to remove warnings */
115}
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