0
|
1 |
/****************************************************************************
|
|
2 |
**
|
|
3 |
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
|
|
4 |
** All rights reserved.
|
|
5 |
** Contact: Nokia Corporation (qt-info@nokia.com)
|
|
6 |
**
|
|
7 |
** This file is part of the QtCore module of the Qt Toolkit.
|
|
8 |
**
|
|
9 |
** $QT_BEGIN_LICENSE:LGPL$
|
|
10 |
** No Commercial Usage
|
|
11 |
** This file contains pre-release code and may not be distributed.
|
|
12 |
** You may use this file in accordance with the terms and conditions
|
|
13 |
** contained in the Technology Preview License Agreement accompanying
|
|
14 |
** this package.
|
|
15 |
**
|
|
16 |
** GNU Lesser General Public License Usage
|
|
17 |
** Alternatively, this file may be used under the terms of the GNU Lesser
|
|
18 |
** General Public License version 2.1 as published by the Free Software
|
|
19 |
** Foundation and appearing in the file LICENSE.LGPL included in the
|
|
20 |
** packaging of this file. Please review the following information to
|
|
21 |
** ensure the GNU Lesser General Public License version 2.1 requirements
|
|
22 |
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
|
|
23 |
**
|
|
24 |
** In addition, as a special exception, Nokia gives you certain additional
|
|
25 |
** rights. These rights are described in the Nokia Qt LGPL Exception
|
|
26 |
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
|
|
27 |
**
|
|
28 |
** If you have questions regarding the use of this file, please contact
|
|
29 |
** Nokia at qt-info@nokia.com.
|
|
30 |
**
|
|
31 |
**
|
|
32 |
**
|
|
33 |
**
|
|
34 |
**
|
|
35 |
**
|
|
36 |
**
|
|
37 |
**
|
|
38 |
** $QT_END_LICENSE$
|
|
39 |
**
|
|
40 |
****************************************************************************/
|
|
41 |
|
|
42 |
#ifndef QATOMIC_H
|
|
43 |
#define QATOMIC_H
|
|
44 |
|
|
45 |
#include <QtCore/qglobal.h>
|
|
46 |
#include <QtCore/qbasicatomic.h>
|
|
47 |
|
|
48 |
QT_BEGIN_HEADER
|
|
49 |
|
|
50 |
QT_BEGIN_NAMESPACE
|
|
51 |
|
|
52 |
QT_MODULE(Core)
|
|
53 |
|
|
54 |
// High-level atomic integer operations
|
|
55 |
class Q_CORE_EXPORT QAtomicInt : public QBasicAtomicInt
|
|
56 |
{
|
|
57 |
public:
|
|
58 |
inline QAtomicInt(int value = 0)
|
|
59 |
{
|
|
60 |
#ifdef QT_ARCH_PARISC
|
|
61 |
this->_q_lock[0] = this->_q_lock[1] = this->_q_lock[2] = this->_q_lock[3] = -1;
|
|
62 |
#endif
|
|
63 |
_q_value = value;
|
|
64 |
}
|
|
65 |
inline QAtomicInt(const QAtomicInt &other)
|
|
66 |
{
|
|
67 |
#ifdef QT_ARCH_PARISC
|
|
68 |
this->_q_lock[0] = this->_q_lock[1] = this->_q_lock[2] = this->_q_lock[3] = -1;
|
|
69 |
#endif
|
|
70 |
_q_value = other._q_value;
|
|
71 |
}
|
|
72 |
|
|
73 |
inline QAtomicInt &operator=(int value)
|
|
74 |
{
|
|
75 |
(void) QBasicAtomicInt::operator=(value);
|
|
76 |
return *this;
|
|
77 |
}
|
|
78 |
|
|
79 |
inline QAtomicInt &operator=(const QAtomicInt &other)
|
|
80 |
{
|
|
81 |
(void) QBasicAtomicInt::operator=(other);
|
|
82 |
return *this;
|
|
83 |
}
|
|
84 |
|
|
85 |
#ifdef qdoc
|
|
86 |
bool operator==(int value) const;
|
|
87 |
bool operator!=(int value) const;
|
|
88 |
bool operator!() const;
|
|
89 |
operator int() const;
|
|
90 |
|
|
91 |
static bool isReferenceCountingNative();
|
|
92 |
static bool isReferenceCountingWaitFree();
|
|
93 |
|
|
94 |
bool ref();
|
|
95 |
bool deref();
|
|
96 |
|
|
97 |
static bool isTestAndSetNative();
|
|
98 |
static bool isTestAndSetWaitFree();
|
|
99 |
|
|
100 |
bool testAndSetRelaxed(int expectedValue, int newValue);
|
|
101 |
bool testAndSetAcquire(int expectedValue, int newValue);
|
|
102 |
bool testAndSetRelease(int expectedValue, int newValue);
|
|
103 |
bool testAndSetOrdered(int expectedValue, int newValue);
|
|
104 |
|
|
105 |
static bool isFetchAndStoreNative();
|
|
106 |
static bool isFetchAndStoreWaitFree();
|
|
107 |
|
|
108 |
int fetchAndStoreRelaxed(int newValue);
|
|
109 |
int fetchAndStoreAcquire(int newValue);
|
|
110 |
int fetchAndStoreRelease(int newValue);
|
|
111 |
int fetchAndStoreOrdered(int newValue);
|
|
112 |
|
|
113 |
static bool isFetchAndAddNative();
|
|
114 |
static bool isFetchAndAddWaitFree();
|
|
115 |
|
|
116 |
int fetchAndAddRelaxed(int valueToAdd);
|
|
117 |
int fetchAndAddAcquire(int valueToAdd);
|
|
118 |
int fetchAndAddRelease(int valueToAdd);
|
|
119 |
int fetchAndAddOrdered(int valueToAdd);
|
|
120 |
#endif
|
|
121 |
};
|
|
122 |
|
|
123 |
// High-level atomic pointer operations
|
|
124 |
template <typename T>
|
|
125 |
class QAtomicPointer : public QBasicAtomicPointer<T>
|
|
126 |
{
|
|
127 |
public:
|
|
128 |
inline QAtomicPointer(T *value = 0)
|
|
129 |
{
|
|
130 |
#ifdef QT_ARCH_PARISC
|
|
131 |
this->_q_lock[0] = this->_q_lock[1] = this->_q_lock[2] = this->_q_lock[3] = -1;
|
|
132 |
#endif
|
|
133 |
QBasicAtomicPointer<T>::_q_value = value;
|
|
134 |
}
|
|
135 |
inline QAtomicPointer(const QAtomicPointer<T> &other)
|
|
136 |
{
|
|
137 |
#ifdef QT_ARCH_PARISC
|
|
138 |
this->_q_lock[0] = this->_q_lock[1] = this->_q_lock[2] = this->_q_lock[3] = -1;
|
|
139 |
#endif
|
|
140 |
QBasicAtomicPointer<T>::_q_value = other._q_value;
|
|
141 |
}
|
|
142 |
|
|
143 |
inline QAtomicPointer<T> &operator=(T *value)
|
|
144 |
{
|
|
145 |
(void) QBasicAtomicPointer<T>::operator=(value);
|
|
146 |
return *this;
|
|
147 |
}
|
|
148 |
|
|
149 |
inline QAtomicPointer<T> &operator=(const QAtomicPointer<T> &other)
|
|
150 |
{
|
|
151 |
(void) QBasicAtomicPointer<T>::operator=(other);
|
|
152 |
return *this;
|
|
153 |
}
|
|
154 |
|
|
155 |
#ifdef qdoc
|
|
156 |
bool operator==(T *value) const;
|
|
157 |
bool operator!=(T *value) const;
|
|
158 |
bool operator!() const;
|
|
159 |
operator T *() const;
|
|
160 |
T *operator->() const;
|
|
161 |
|
|
162 |
static bool isTestAndSetNative();
|
|
163 |
static bool isTestAndSetWaitFree();
|
|
164 |
|
|
165 |
bool testAndSetRelaxed(T *expectedValue, T *newValue);
|
|
166 |
bool testAndSetAcquire(T *expectedValue, T *newValue);
|
|
167 |
bool testAndSetRelease(T *expectedValue, T *newValue);
|
|
168 |
bool testAndSetOrdered(T *expectedValue, T *newValue);
|
|
169 |
|
|
170 |
static bool isFetchAndStoreNative();
|
|
171 |
static bool isFetchAndStoreWaitFree();
|
|
172 |
|
|
173 |
T *fetchAndStoreRelaxed(T *newValue);
|
|
174 |
T *fetchAndStoreAcquire(T *newValue);
|
|
175 |
T *fetchAndStoreRelease(T *newValue);
|
|
176 |
T *fetchAndStoreOrdered(T *newValue);
|
|
177 |
|
|
178 |
static bool isFetchAndAddNative();
|
|
179 |
static bool isFetchAndAddWaitFree();
|
|
180 |
|
|
181 |
T *fetchAndAddRelaxed(qptrdiff valueToAdd);
|
|
182 |
T *fetchAndAddAcquire(qptrdiff valueToAdd);
|
|
183 |
T *fetchAndAddRelease(qptrdiff valueToAdd);
|
|
184 |
T *fetchAndAddOrdered(qptrdiff valueToAdd);
|
|
185 |
#endif
|
|
186 |
};
|
|
187 |
|
|
188 |
/*!
|
|
189 |
This is a helper for the assignment operators of implicitly
|
|
190 |
shared classes. Your assignment operator should look like this:
|
|
191 |
|
|
192 |
\snippet doc/src/snippets/code/src.corelib.thread.qatomic.h 0
|
|
193 |
*/
|
|
194 |
template <typename T>
|
|
195 |
inline void qAtomicAssign(T *&d, T *x)
|
|
196 |
{
|
|
197 |
if (d == x)
|
|
198 |
return;
|
|
199 |
x->ref.ref();
|
|
200 |
if (!d->ref.deref())
|
|
201 |
delete d;
|
|
202 |
d = x;
|
|
203 |
}
|
|
204 |
|
|
205 |
/*!
|
|
206 |
This is a helper for the detach method of implicitly shared
|
|
207 |
classes. Your private class needs a copy constructor which copies
|
|
208 |
the members and sets the refcount to 1. After that, your detach
|
|
209 |
function should look like this:
|
|
210 |
|
|
211 |
\snippet doc/src/snippets/code/src.corelib.thread.qatomic.h 1
|
|
212 |
*/
|
|
213 |
template <typename T>
|
|
214 |
inline void qAtomicDetach(T *&d)
|
|
215 |
{
|
|
216 |
if (d->ref == 1)
|
|
217 |
return;
|
|
218 |
T *x = d;
|
|
219 |
d = new T(*d);
|
|
220 |
if (!x->ref.deref())
|
|
221 |
delete x;
|
|
222 |
}
|
|
223 |
|
|
224 |
QT_END_NAMESPACE
|
|
225 |
QT_END_HEADER
|
|
226 |
|
|
227 |
#endif // QATOMIC_H
|