1/*
2Copyright (c) 2012, Broadcom Europe Ltd
3All rights reserved.
4
5Redistribution and use in source and binary forms, with or without
6modification, are permitted provided that the following conditions are met:
7 * Redistributions of source code must retain the above copyright
8 notice, this list of conditions and the following disclaimer.
9 * Redistributions in binary form must reproduce the above copyright
10 notice, this list of conditions and the following disclaimer in the
11 documentation and/or other materials provided with the distribution.
12 * Neither the name of the copyright holder nor the
13 names of its contributors may be used to endorse or promote products
14 derived from this software without specific prior written permission.
15
16THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
17ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
20DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26*/
27
28/*=============================================================================
29VideoCore OS Abstraction Layer - reentrant mutexes created from regular ones.
30=============================================================================*/
31
32#ifndef VCOS_GENERIC_QUICKSLOW_MUTEX_H
33#define VCOS_GENERIC_QUICKSLOW_MUTEX_H
34
35#ifdef __cplusplus
36extern "C" {
37#endif
38
39#include "interface/vcos/vcos_types.h"
40
41/**
42 * \file
43 *
44 * Quickslow Mutexes implemented as regular ones (i.e. quick and slow modes are the same).
45 *
46 */
47
48typedef VCOS_MUTEX_T VCOS_QUICKSLOW_MUTEX_T;
49
50#if defined(VCOS_INLINE_BODIES)
51VCOS_INLINE_IMPL
52VCOS_STATUS_T vcos_quickslow_mutex_create(VCOS_QUICKSLOW_MUTEX_T *m, const char *name)
53{
54 return vcos_mutex_create(m, name);
55}
56
57VCOS_INLINE_IMPL
58void vcos_quickslow_mutex_delete(VCOS_QUICKSLOW_MUTEX_T *m)
59{
60 vcos_mutex_delete(m);
61}
62
63VCOS_INLINE_IMPL
64void vcos_quickslow_mutex_lock(VCOS_QUICKSLOW_MUTEX_T *m)
65{
66 while (vcos_mutex_lock(m) == VCOS_EAGAIN);
67}
68
69VCOS_INLINE_IMPL
70void vcos_quickslow_mutex_unlock(VCOS_QUICKSLOW_MUTEX_T *m)
71{
72 vcos_mutex_unlock(m);
73}
74
75VCOS_INLINE_IMPL
76void vcos_quickslow_mutex_lock_quick(VCOS_QUICKSLOW_MUTEX_T *m)
77{
78 while (vcos_mutex_lock(m) == VCOS_EAGAIN);
79}
80
81VCOS_INLINE_IMPL
82void vcos_quickslow_mutex_unlock_quick(VCOS_QUICKSLOW_MUTEX_T *m)
83{
84 vcos_mutex_unlock(m);
85}
86
87#endif
88
89
90#ifdef __cplusplus
91}
92#endif
93#endif
94
95
96