1 | /**************************************************************************** |
2 | ** |
3 | ** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies). |
4 | ** Contact: http://www.qt-project.org/legal |
5 | ** |
6 | ** This file is part of the QtCore module of the Qt Toolkit. |
7 | ** |
8 | ** $QT_BEGIN_LICENSE:LGPL$ |
9 | ** Commercial License Usage |
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15 | ** use the contact form at http://qt.digia.com/contact-us. |
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17 | ** GNU Lesser General Public License Usage |
18 | ** Alternatively, this file may be used under the terms of the GNU Lesser |
19 | ** General Public License version 2.1 as published by the Free Software |
20 | ** Foundation and appearing in the file LICENSE.LGPL included in the |
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22 | ** ensure the GNU Lesser General Public License version 2.1 requirements |
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25 | ** In addition, as a special exception, Digia gives you certain additional |
26 | ** rights. These rights are described in the Digia Qt LGPL Exception |
27 | ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
28 | ** |
29 | ** GNU General Public License Usage |
30 | ** Alternatively, this file may be used under the terms of the GNU |
31 | ** General Public License version 3.0 as published by the Free Software |
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34 | ** ensure the GNU General Public License version 3.0 requirements will be |
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36 | ** |
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38 | ** $QT_END_LICENSE$ |
39 | ** |
40 | ****************************************************************************/ |
41 | |
42 | #ifndef QBASICATOMIC_H |
43 | #define QBASICATOMIC_H |
44 | |
45 | #include <QtCore/qglobal.h> |
46 | |
47 | QT_BEGIN_HEADER |
48 | |
49 | QT_BEGIN_NAMESPACE |
50 | |
51 | QT_MODULE(Core) |
52 | |
53 | class Q_CORE_EXPORT QBasicAtomicInt |
54 | { |
55 | public: |
56 | #ifdef QT_ARCH_PARISC |
57 | int _q_lock[4]; |
58 | #endif |
59 | #if defined(QT_ARCH_WINDOWS) || defined(QT_ARCH_WINDOWSCE) |
60 | union { // needed for Q_BASIC_ATOMIC_INITIALIZER |
61 | volatile long _q_value; |
62 | }; |
63 | #else |
64 | volatile int _q_value; |
65 | #endif |
66 | |
67 | // Non-atomic API |
68 | inline bool operator==(int value) const |
69 | { |
70 | return _q_value == value; |
71 | } |
72 | |
73 | inline bool operator!=(int value) const |
74 | { |
75 | return _q_value != value; |
76 | } |
77 | |
78 | inline bool operator!() const |
79 | { |
80 | return _q_value == 0; |
81 | } |
82 | |
83 | inline operator int() const |
84 | { |
85 | return _q_value; |
86 | } |
87 | |
88 | inline QBasicAtomicInt &operator=(int value) |
89 | { |
90 | #ifdef QT_ARCH_PARISC |
91 | this->_q_lock[0] = this->_q_lock[1] = this->_q_lock[2] = this->_q_lock[3] = -1; |
92 | #endif |
93 | _q_value = value; |
94 | return *this; |
95 | } |
96 | |
97 | // Atomic API, implemented in qatomic_XXX.h |
98 | |
99 | static bool isReferenceCountingNative(); |
100 | static bool isReferenceCountingWaitFree(); |
101 | |
102 | bool ref(); |
103 | bool deref(); |
104 | |
105 | static bool isTestAndSetNative(); |
106 | static bool isTestAndSetWaitFree(); |
107 | |
108 | bool testAndSetRelaxed(int expectedValue, int newValue); |
109 | bool testAndSetAcquire(int expectedValue, int newValue); |
110 | bool testAndSetRelease(int expectedValue, int newValue); |
111 | bool testAndSetOrdered(int expectedValue, int newValue); |
112 | |
113 | static bool isFetchAndStoreNative(); |
114 | static bool isFetchAndStoreWaitFree(); |
115 | |
116 | int fetchAndStoreRelaxed(int newValue); |
117 | int fetchAndStoreAcquire(int newValue); |
118 | int fetchAndStoreRelease(int newValue); |
119 | int fetchAndStoreOrdered(int newValue); |
120 | |
121 | static bool isFetchAndAddNative(); |
122 | static bool isFetchAndAddWaitFree(); |
123 | |
124 | int fetchAndAddRelaxed(int valueToAdd); |
125 | int fetchAndAddAcquire(int valueToAdd); |
126 | int fetchAndAddRelease(int valueToAdd); |
127 | int fetchAndAddOrdered(int valueToAdd); |
128 | }; |
129 | |
130 | template <typename T> |
131 | class QBasicAtomicPointer |
132 | { |
133 | public: |
134 | #ifdef QT_ARCH_PARISC |
135 | int _q_lock[4]; |
136 | #endif |
137 | #if defined(QT_ARCH_WINDOWS) || defined(QT_ARCH_WINDOWSCE) |
138 | union { |
139 | T * volatile _q_value; |
140 | # if !defined(Q_OS_WINCE) && !defined(__i386__) && !defined(_M_IX86) |
141 | qint64 |
142 | # else |
143 | long |
144 | # endif |
145 | volatile _q_value_integral; |
146 | }; |
147 | #else |
148 | T * volatile _q_value; |
149 | #endif |
150 | |
151 | // Non-atomic API |
152 | inline bool operator==(T *value) const |
153 | { |
154 | return _q_value == value; |
155 | } |
156 | |
157 | inline bool operator!=(T *value) const |
158 | { |
159 | return !operator==(value); |
160 | } |
161 | |
162 | inline bool operator!() const |
163 | { |
164 | return operator==(0); |
165 | } |
166 | |
167 | inline operator T *() const |
168 | { |
169 | return _q_value; |
170 | } |
171 | |
172 | inline T *operator->() const |
173 | { |
174 | return _q_value; |
175 | } |
176 | |
177 | inline QBasicAtomicPointer<T> &operator=(T *value) |
178 | { |
179 | #ifdef QT_ARCH_PARISC |
180 | this->_q_lock[0] = this->_q_lock[1] = this->_q_lock[2] = this->_q_lock[3] = -1; |
181 | #endif |
182 | _q_value = value; |
183 | return *this; |
184 | } |
185 | |
186 | // Atomic API, implemented in qatomic_XXX.h |
187 | |
188 | static bool isTestAndSetNative(); |
189 | static bool isTestAndSetWaitFree(); |
190 | |
191 | bool testAndSetRelaxed(T *expectedValue, T *newValue); |
192 | bool testAndSetAcquire(T *expectedValue, T *newValue); |
193 | bool testAndSetRelease(T *expectedValue, T *newValue); |
194 | bool testAndSetOrdered(T *expectedValue, T *newValue); |
195 | |
196 | static bool isFetchAndStoreNative(); |
197 | static bool isFetchAndStoreWaitFree(); |
198 | |
199 | T *fetchAndStoreRelaxed(T *newValue); |
200 | T *fetchAndStoreAcquire(T *newValue); |
201 | T *fetchAndStoreRelease(T *newValue); |
202 | T *fetchAndStoreOrdered(T *newValue); |
203 | |
204 | static bool isFetchAndAddNative(); |
205 | static bool isFetchAndAddWaitFree(); |
206 | |
207 | T *fetchAndAddRelaxed(qptrdiff valueToAdd); |
208 | T *fetchAndAddAcquire(qptrdiff valueToAdd); |
209 | T *fetchAndAddRelease(qptrdiff valueToAdd); |
210 | T *fetchAndAddOrdered(qptrdiff valueToAdd); |
211 | }; |
212 | |
213 | #ifdef QT_ARCH_PARISC |
214 | # define Q_BASIC_ATOMIC_INITIALIZER(a) {{-1,-1,-1,-1},(a)} |
215 | #elif defined(QT_ARCH_WINDOWS) || defined(QT_ARCH_WINDOWSCE) |
216 | # define Q_BASIC_ATOMIC_INITIALIZER(a) { {(a)} } |
217 | #else |
218 | # define Q_BASIC_ATOMIC_INITIALIZER(a) { (a) } |
219 | #endif |
220 | |
221 | QT_END_NAMESPACE |
222 | QT_END_HEADER |
223 | |
224 | #if defined(QT_MOC) || defined(QT_BUILD_QMAKE) || defined(QT_RCC) || defined(QT_UIC) || defined(QT_BOOTSTRAPPED) |
225 | # include <QtCore/qatomic_bootstrap.h> |
226 | #else |
227 | # include <QtCore/qatomic_arch.h> |
228 | #endif |
229 | |
230 | #endif // QBASIC_ATOMIC |
231 | |