summaryrefslogtreecommitdiff
path: root/doc/src/snippets/code/doc_src_atomic-operations.qdoc
blob: 3f5df8a694e06e5aefb85cc77caac6dc276fc7bf (plain)
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
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights.  These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

//! [0]
if (*ptr == expected) {
    *ptr = newval;
    return !0;
}
return 0;
//! [0]


//! [1]
if (*ptr == expected) {
    *ptr = newval;
    return !0;
}
return 0;
//! [1]


//! [2]
++(*ptr);
return *ptr ? !0 : 0;
//! [2]


//! [3]
return ++(*ptr);
//! [3]


//! [4]
++(*ptr);
return !(ControlRegister & ZeroFlag);
//! [4]


//! [5]
--(*ptr);
return *ptr ?  : 0;
//! [5]


//! [6]
return --(*ptr);
//! [6]


//! [7]
--(*ptr);
return !(ControlRegister & ZeroFlag);
//! [7]


//! [8]
tmp = *ptr;
*ptr = newval;
return tmp;
//! [8]


//! [9]
tmp = *ptr;
*ptr = newval;
return tmp;
//! [9]


//! [10]
tmp = *ptr;
*ptr += value;
return tmp;
//! [10]