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
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
/****************************************************************************
**
** Copyright (C) 2011 Thiago Macieira <thiago@kde.org>
** Contact: http://www.qt-project.org/
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QATOMIC_GCC_H
#define QATOMIC_GCC_H
#include <QtCore/qgenericatomic.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
#if 0
#pragma qt_sync_stop_processing
#endif
template<> struct QAtomicIntegerTraits<int> { enum { IsInteger = 1 }; };
template<> struct QAtomicIntegerTraits<unsigned int> { enum { IsInteger = 1 }; };
#define Q_ATOMIC_INT_REFERENCE_COUNTING_IS_SOMETIMES_NATIVE
#define Q_ATOMIC_INT_TEST_AND_SET_IS_SOMETIMES_NATIVE
#define Q_ATOMIC_INT_FETCH_AND_STORE_IS_SOMETIMES_NATIVE
#define Q_ATOMIC_INT_FETCH_AND_ADD_IS_SOMETIMES_NATIVE
#define Q_ATOMIC_INT32_IS_SUPPORTED
#define Q_ATOMIC_INT32_REFERENCE_COUNTING_IS_SOMETIMES_NATIVE
#define Q_ATOMIC_INT32_TEST_AND_SET_IS_SOMETIMES_NATIVE
#define Q_ATOMIC_INT32_FETCH_AND_STORE_IS_SOMETIMES_NATIVE
#define Q_ATOMIC_INT32_FETCH_AND_ADD_IS_SOMETIMES_NATIVE
#define Q_ATOMIC_POINTER_REFERENCE_COUNTING_IS_SOMETIMES_NATIVE
#define Q_ATOMIC_POINTER_TEST_AND_SET_IS_SOMETIMES_NATIVE
#define Q_ATOMIC_POINTER_FETCH_AND_STORE_IS_SOMETIMES_NATIVE
#define Q_ATOMIC_POINTER_FETCH_AND_ADD_IS_SOMETIMES_NATIVE
template <typename T> struct QAtomicOps: QGenericAtomicOps<QAtomicOps<T> >
{
// The GCC intrinsics all have fully-ordered memory semantics, so we define
// only the xxxRelaxed functions. The exception is __sync_lock_and_test,
// which has acquire semantics, so we need to define the Release and
// Ordered versions too.
typedef T Type;
#ifndef __ia64__
static T loadAcquire(T &_q_value)
{
T tmp = _q_value;
__sync_synchronize();
return tmp;
}
static void storeRelease(T &_q_value, T newValue)
{
__sync_synchronize();
_q_value = newValue;
}
#endif
static bool isTestAndSetNative() { return false; }
static bool isTestAndSetWaitFree() { return false; }
static bool testAndSetRelaxed(T &_q_value, T expectedValue, T newValue)
{
return __sync_bool_compare_and_swap(&_q_value, expectedValue, newValue);
}
static T fetchAndStoreRelaxed(T &_q_value, T newValue)
{
return __sync_lock_test_and_set(&_q_value, newValue);
}
static T fetchAndStoreRelease(T &_q_value, T newValue)
{
__sync_synchronize();
return __sync_lock_test_and_set(&_q_value, newValue);
}
static T fetchAndStoreOrdered(T &_q_value, T newValue)
{
return fetchAndStoreRelease(_q_value, newValue);
}
static
T fetchAndAddRelaxed(T &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd)
{
return __sync_fetch_and_add(&_q_value, valueToAdd * QAtomicAdditiveType<T>::AddScale);
}
};
QT_END_NAMESPACE
QT_END_HEADER
#endif // QATOMIC_GCC_H
|
