source: rtems/cpukit/score/src/corespinlockrelease.c @ 3f72dda6

4.11
Last change on this file since 3f72dda6 was 3f72dda6, checked in by Sebastian Huber <sebastian.huber@…>, on May 25, 2016 at 6:37:28 AM

posix: Fix pthread_spin_unlock() error status

Update #2719.

  • Property mode set to 100644
File size: 1.1 KB
Line 
1/**
2 * @file
3 *
4 * @brief Release a Spinlock
5 * @ingroup ScoreSpinlock
6 */
7
8/*
9 *  COPYRIGHT (c) 1989-2006.
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.org/license/LICENSE.
15 */
16
17#if HAVE_CONFIG_H
18#include "config.h"
19#endif
20
21#include <rtems/score/corespinlockimpl.h>
22#include <rtems/score/percpu.h>
23#include <rtems/score/thread.h>
24#include <rtems/score/watchdog.h>
25
26CORE_spinlock_Status _CORE_spinlock_Release(
27  CORE_spinlock_Control  *the_spinlock
28)
29{
30  ISR_Level level;
31
32  _ISR_Disable( level );
33
34    /*
35     *  It must locked by the current thread before it can be unlocked.
36     */
37    if (
38      the_spinlock->lock != CORE_SPINLOCK_LOCKED
39        || the_spinlock->holder != _Thread_Executing
40    ) {
41      _ISR_Enable( level );
42      return CORE_SPINLOCK_NOT_HOLDER;
43    }
44
45    /*
46     *  Let it be unlocked.
47     */
48    the_spinlock->users -= 1;
49    the_spinlock->lock   = CORE_SPINLOCK_UNLOCKED;
50    the_spinlock->holder = 0;
51
52  _ISR_Enable( level );
53  return CORE_SPINLOCK_SUCCESSFUL;
54}
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