source: rtems-libbsd/rtemsbsd/rtems/rtems-bsd-muteximpl.c @ 07ff2c1

55-freebsd-126-freebsd-12freebsd-9.3
Last change on this file since 07ff2c1 was 07ff2c1, checked in by Sebastian Huber <sebastian.huber@…>, on 07/24/15 at 08:42:35

rtems-bsd-mutex: Update due to API changes

  • Property mode set to 100644
File size: 3.0 KB
Line 
1/**
2 * @file
3 *
4 * @ingroup rtems_bsd_rtems
5 *
6 * @brief TODO.
7 */
8
9/*
10 * Copyright (c) 2014, 2015 embedded brains GmbH.  All rights reserved.
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>
44#include <rtems/score/threadqimpl.h>
45
46#define BSD_MUTEX_TQ_OPERATIONS &_Thread_queue_Operations_priority
47
48void
49rtems_bsd_mutex_lock_more(struct lock_object *lock, rtems_bsd_mutex *m,
50    Thread_Control *owner, Thread_Control *executing,
51    ISR_lock_Context *lock_context)
52{
53        if (owner == executing) {
54                BSD_ASSERT(lock->lo_flags & LO_RECURSABLE);
55                ++m->nest_level;
56
57                _Thread_queue_Release(&m->queue, lock_context);
58        } else {
59                /* Priority inheritance */
60                _Thread_Raise_priority(owner, executing->current_priority);
61
62                ++executing->resource_count;
63                _Thread_queue_Enqueue_critical(&m->queue,
64                    BSD_MUTEX_TQ_OPERATIONS, executing,
65                    STATES_WAITING_FOR_MUTEX, WATCHDOG_NO_TIMEOUT, 0,
66                    lock_context);
67        }
68}
69
70void
71rtems_bsd_mutex_unlock_more(rtems_bsd_mutex *m, Thread_Control *owner,
72    int keep_priority, Thread_queue_Heads *heads,
73    ISR_lock_Context *lock_context)
74{
75        if (heads != NULL) {
76                const Thread_queue_Operations *operations;
77                Thread_Control *new_owner;
78
79                operations = BSD_MUTEX_TQ_OPERATIONS;
80                new_owner = ( *operations->first )( heads );
81                m->owner = new_owner;
82                _Thread_queue_Extract_critical(&m->queue, operations,
83                    new_owner, lock_context);
84        } else {
85                _Thread_queue_Release(&m->queue, lock_context);
86        }
87
88        if (!keep_priority) {
89                Per_CPU_Control *cpu_self;
90
91                cpu_self = _Thread_Dispatch_disable();
92                _Thread_Restore_priority(owner);
93                _Thread_Dispatch_enable(cpu_self);
94        }
95}
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