source: rtems-libbsd/rtemsbsd/rtems/rtems-kernel-muteximpl.c @ eae664e

55-freebsd-126-freebsd-12
Last change on this file since eae664e was eae664e, checked in by Sebastian Huber <sebastian.huber@…>, on Mar 12, 2018 at 1:38:46 PM

mutex: Use panic() after ISR lock release

Using panic() with interrupts disabled could lead to an additional error
(INTERNAL_ERROR_BAD_THREAD_DISPATCH_ENVIRONMENT) due to a potentially
blocking output.

  • Property mode set to 100644
File size: 2.4 KB
RevLine 
[8176af1]1/**
2 * @file
3 *
4 * @ingroup rtems_bsd_rtems
5 *
6 * @brief TODO.
7 */
8
9/*
[eae664e]10 * Copyright (c) 2014, 2018 embedded brains GmbH.  All rights reserved.
[8176af1]11 *
12 *  embedded brains GmbH
13 *  Dornierstr. 4
14 *  82178 Puchheim
15 *  Germany
16 *  <rtems@embedded-brains.de>
17 *
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions
20 * are met:
21 * 1. Redistributions of source code must retain the above copyright
22 *    notice, this list of conditions and the following disclaimer.
23 * 2. Redistributions in binary form must reproduce the above copyright
24 *    notice, this list of conditions and the following disclaimer in the
25 *    documentation and/or other materials provided with the distribution.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 */
39
40#include <machine/rtems-bsd-kernel-space.h>
41#include <machine/rtems-bsd-muteximpl.h>
42
43#include <rtems/score/schedulerimpl.h>
[07ff2c1]44
[8176af1]45void
46rtems_bsd_mutex_lock_more(struct lock_object *lock, rtems_bsd_mutex *m,
[c0b0b3e]47    Thread_Control *owner, Thread_Control *executing,
[9546d90]48    Thread_queue_Context *queue_context)
[8176af1]49{
50        if (owner == executing) {
[eae664e]51                if ((lock->lo_flags & LO_RECURSABLE) == 0) {
52                        _Thread_queue_Release(&m->queue, queue_context);
53                        panic("mutex lock: %s: not LO_RECURSABLE\n",
54                            m->queue.Queue.name);
55                }
[8176af1]56
[eae664e]57                ++m->nest_level;
[87e3b46]58                _Thread_queue_Release(&m->queue, queue_context);
[8176af1]59        } else {
[87e3b46]60                _Thread_queue_Context_set_thread_state(queue_context,
[e5ef01e]61                    STATES_WAITING_FOR_MUTEX);
[2fcf5aa]62                _Thread_queue_Context_set_enqueue_do_nothing_extra(
[87e3b46]63                    queue_context);
[bf7faad]64                _Thread_queue_Context_set_deadlock_callout(queue_context,
65                    _Thread_queue_Deadlock_fatal);
[87e3b46]66                _Thread_queue_Enqueue(&m->queue.Queue,
67                    RTEMS_BSD_MUTEX_TQ_OPERATIONS, executing, queue_context);
[8176af1]68        }
69}
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