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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 |
228 | |