1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
/*
* Copyright (c) 2013, Ford Motor Company
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following
* disclaimer in the documentation and/or other materials provided with the
* distribution.
*
* Neither the name of the Ford Motor Company nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef SRC_COMPONENTS_INCLUDE_UTILS_ATOMIC_H_
#define SRC_COMPONENTS_INCLUDE_UTILS_ATOMIC_H_
#ifdef __QNXNTO__
#include <atomic.h>
#endif
#if defined(__QNXNTO__)
#define atomic_post_inc(ptr) atomic_add_value((ptr), 1)
#elif defined(__GNUG__)
#define atomic_post_inc(ptr) __sync_fetch_and_add((ptr), 1)
#else
#warning "atomic_post_inc() implementation is not atomic"
#define atomic_post_inc(ptr) (*(ptr))++
#endif
#if defined(__QNXNTO__)
#define atomic_post_dec(ptr) atomic_sub_value((ptr), 1)
#elif defined(__GNUG__)
#define atomic_post_dec(ptr) __sync_fetch_and_sub((ptr), 1)
#else
#warning "atomic_post_dec() implementation is not atomic"
#define atomic_post_dec(ptr) (*(ptr))--
#endif
#if defined(__QNXNTO__)
// on QNX pointer assignment is believed to be atomic
#define atomic_pointer_assign(dst, src) (dst) = (src)
#elif defined(__GNUG__)
// with g++ pointer assignment is believed to be atomic
#define atomic_pointer_assign(dst, src) (dst) = (src)
#else
#warning atomic_pointer_assign() implementation may be non-atomic
#define atomic_pointer_assign(dst, src) (dst) = (src)
#endif
#if defined(__QNXNTO__)
#define atomic_post_set(dst) atomic_set_value(dst, 1)
#elif defined(__GNUG__)
#define atomic_post_set(dst) __sync_val_compare_and_swap((dst), 0, 1)
#else
#error "atomic post set operation not defined"
#endif
#if defined(__QNXNTO__)
#define atomic_post_clr(dst) atomic_clr_value(dst, 1)
#elif defined(__GNUG__)
#define atomic_post_clr(dst) __sync_val_compare_and_swap((dst), 1, 0)
#else
#error "atomic post clear operation not defined"
#endif
#endif // SRC_COMPONENTS_INCLUDE_UTILS_ATOMIC_H_
|
