1 | /* |
2 | Copyright (c) 2012, Broadcom Europe Ltd |
3 | All rights reserved. |
4 | |
5 | Redistribution and use in source and binary forms, with or without |
6 | modification, 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 | |
16 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
17 | ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
18 | WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
19 | DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY |
20 | DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
21 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
22 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
23 | ON 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 |
25 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | */ |
27 | |
28 | /*============================================================================= |
29 | VideoCore 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 |
36 | extern "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 | |
48 | typedef VCOS_MUTEX_T VCOS_QUICKSLOW_MUTEX_T; |
49 | |
50 | #if defined(VCOS_INLINE_BODIES) |
51 | VCOS_INLINE_IMPL |
52 | VCOS_STATUS_T vcos_quickslow_mutex_create(VCOS_QUICKSLOW_MUTEX_T *m, const char *name) |
53 | { |
54 | return vcos_mutex_create(m, name); |
55 | } |
56 | |
57 | VCOS_INLINE_IMPL |
58 | void vcos_quickslow_mutex_delete(VCOS_QUICKSLOW_MUTEX_T *m) |
59 | { |
60 | vcos_mutex_delete(m); |
61 | } |
62 | |
63 | VCOS_INLINE_IMPL |
64 | void vcos_quickslow_mutex_lock(VCOS_QUICKSLOW_MUTEX_T *m) |
65 | { |
66 | while (vcos_mutex_lock(m) == VCOS_EAGAIN); |
67 | } |
68 | |
69 | VCOS_INLINE_IMPL |
70 | void vcos_quickslow_mutex_unlock(VCOS_QUICKSLOW_MUTEX_T *m) |
71 | { |
72 | vcos_mutex_unlock(m); |
73 | } |
74 | |
75 | VCOS_INLINE_IMPL |
76 | void vcos_quickslow_mutex_lock_quick(VCOS_QUICKSLOW_MUTEX_T *m) |
77 | { |
78 | while (vcos_mutex_lock(m) == VCOS_EAGAIN); |
79 | } |
80 | |
81 | VCOS_INLINE_IMPL |
82 | void 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 | |