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3** Copyright (C) 2011 Thiago Macieira <thiago@kde.org>
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40
41#include <QtCore/qglobal.h>
42
43#ifndef QBASICATOMIC_H
44#define QBASICATOMIC_H
45
46#if defined(QT_BOOTSTRAPPED)
47# include <QtCore/qatomic_bootstrap.h>
48
49// If C++11 atomics are supported, use them!
50// Note that constexpr support is sometimes disabled in QNX or INTEGRITY builds,
51// but their libraries have <atomic>.
52#elif defined(Q_COMPILER_ATOMICS) && (defined(Q_COMPILER_CONSTEXPR) || defined(Q_OS_QNX) || defined(Q_OS_INTEGRITY))
53# include <QtCore/qatomic_cxx11.h>
54
55// We only support one fallback: MSVC, because even on version 2015, it lacks full constexpr support
56#elif defined(Q_CC_MSVC)
57# include <QtCore/qatomic_msvc.h>
58
59// No fallback
60#else
61# error "Qt requires C++11 support"
62#endif
63
64QT_WARNING_PUSH
65QT_WARNING_DISABLE_MSVC(4522)
66
67QT_BEGIN_NAMESPACE
68
69#if 0
70// silence syncqt warnings
71QT_END_NAMESPACE
72#pragma qt_no_master_include
73#pragma qt_sync_stop_processing
74#endif
75
76// New atomics
77
78#if defined(Q_COMPILER_CONSTEXPR)
79# if defined(Q_CC_CLANG) && Q_CC_CLANG < 303
80 /*
81 Do not define QT_BASIC_ATOMIC_HAS_CONSTRUCTORS for Clang before version 3.3.
82 For details about the bug: see http://llvm.org/bugs/show_bug.cgi?id=12670
83 */
84# else
85# define QT_BASIC_ATOMIC_HAS_CONSTRUCTORS
86# endif
87#endif
88
89template <typename T>
90class QBasicAtomicInteger
91{
92public:
93 typedef T Type;
94 typedef QAtomicOps<T> Ops;
95 // static check that this is a valid integer
96 Q_STATIC_ASSERT_X(QTypeInfo<T>::isIntegral, "template parameter is not an integral type");
97 Q_STATIC_ASSERT_X(QAtomicOpsSupport<sizeof(T)>::IsSupported, "template parameter is an integral of a size not supported on this platform");
98
99 typename Ops::Type _q_value;
100
101 // Everything below is either implemented in ../arch/qatomic_XXX.h or (as fallback) in qgenericatomic.h
102#if QT_DEPRECATED_SINCE(5, 14)
103 QT_DEPRECATED_VERSION_X_5_14("Use loadRelaxed") T load() const noexcept { return loadRelaxed(); }
104 QT_DEPRECATED_VERSION_X_5_14("Use storeRelaxed") void store(T newValue) noexcept { storeRelaxed(newValue); }
105#endif
106
107 T loadRelaxed() const noexcept { return Ops::loadRelaxed(_q_value); }
108 void storeRelaxed(T newValue) noexcept { Ops::storeRelaxed(_q_value, newValue); }
109
110 T loadAcquire() const noexcept { return Ops::loadAcquire(_q_value); }
111 void storeRelease(T newValue) noexcept { Ops::storeRelease(_q_value, newValue); }
112 operator T() const noexcept { return loadAcquire(); }
113 T operator=(T newValue) noexcept { storeRelease(newValue); return newValue; }
114
115 static Q_DECL_CONSTEXPR bool isReferenceCountingNative() noexcept { return Ops::isReferenceCountingNative(); }
116 static Q_DECL_CONSTEXPR bool isReferenceCountingWaitFree() noexcept { return Ops::isReferenceCountingWaitFree(); }
117
118 bool ref() noexcept { return Ops::ref(_q_value); }
119 bool deref() noexcept { return Ops::deref(_q_value); }
120
121 static Q_DECL_CONSTEXPR bool isTestAndSetNative() noexcept { return Ops::isTestAndSetNative(); }
122 static Q_DECL_CONSTEXPR bool isTestAndSetWaitFree() noexcept { return Ops::isTestAndSetWaitFree(); }
123
124 bool testAndSetRelaxed(T expectedValue, T newValue) noexcept
125 { return Ops::testAndSetRelaxed(_q_value, expectedValue, newValue); }
126 bool testAndSetAcquire(T expectedValue, T newValue) noexcept
127 { return Ops::testAndSetAcquire(_q_value, expectedValue, newValue); }
128 bool testAndSetRelease(T expectedValue, T newValue) noexcept
129 { return Ops::testAndSetRelease(_q_value, expectedValue, newValue); }
130 bool testAndSetOrdered(T expectedValue, T newValue) noexcept
131 { return Ops::testAndSetOrdered(_q_value, expectedValue, newValue); }
132
133 bool testAndSetRelaxed(T expectedValue, T newValue, T &currentValue) noexcept
134 { return Ops::testAndSetRelaxed(_q_value, expectedValue, newValue, &currentValue); }
135 bool testAndSetAcquire(T expectedValue, T newValue, T &currentValue) noexcept
136 { return Ops::testAndSetAcquire(_q_value, expectedValue, newValue, &currentValue); }
137 bool testAndSetRelease(T expectedValue, T newValue, T &currentValue) noexcept
138 { return Ops::testAndSetRelease(_q_value, expectedValue, newValue, &currentValue); }
139 bool testAndSetOrdered(T expectedValue, T newValue, T &currentValue) noexcept
140 { return Ops::testAndSetOrdered(_q_value, expectedValue, newValue, &currentValue); }
141
142 static Q_DECL_CONSTEXPR bool isFetchAndStoreNative() noexcept { return Ops::isFetchAndStoreNative(); }
143 static Q_DECL_CONSTEXPR bool isFetchAndStoreWaitFree() noexcept { return Ops::isFetchAndStoreWaitFree(); }
144
145 T fetchAndStoreRelaxed(T newValue) noexcept
146 { return Ops::fetchAndStoreRelaxed(_q_value, newValue); }
147 T fetchAndStoreAcquire(T newValue) noexcept
148 { return Ops::fetchAndStoreAcquire(_q_value, newValue); }
149 T fetchAndStoreRelease(T newValue) noexcept
150 { return Ops::fetchAndStoreRelease(_q_value, newValue); }
151 T fetchAndStoreOrdered(T newValue) noexcept
152 { return Ops::fetchAndStoreOrdered(_q_value, newValue); }
153
154 static Q_DECL_CONSTEXPR bool isFetchAndAddNative() noexcept { return Ops::isFetchAndAddNative(); }
155 static Q_DECL_CONSTEXPR bool isFetchAndAddWaitFree() noexcept { return Ops::isFetchAndAddWaitFree(); }
156
157 T fetchAndAddRelaxed(T valueToAdd) noexcept
158 { return Ops::fetchAndAddRelaxed(_q_value, valueToAdd); }
159 T fetchAndAddAcquire(T valueToAdd) noexcept
160 { return Ops::fetchAndAddAcquire(_q_value, valueToAdd); }
161 T fetchAndAddRelease(T valueToAdd) noexcept
162 { return Ops::fetchAndAddRelease(_q_value, valueToAdd); }
163 T fetchAndAddOrdered(T valueToAdd) noexcept
164 { return Ops::fetchAndAddOrdered(_q_value, valueToAdd); }
165
166 T fetchAndSubRelaxed(T valueToAdd) noexcept
167 { return Ops::fetchAndSubRelaxed(_q_value, valueToAdd); }
168 T fetchAndSubAcquire(T valueToAdd) noexcept
169 { return Ops::fetchAndSubAcquire(_q_value, valueToAdd); }
170 T fetchAndSubRelease(T valueToAdd) noexcept
171 { return Ops::fetchAndSubRelease(_q_value, valueToAdd); }
172 T fetchAndSubOrdered(T valueToAdd) noexcept
173 { return Ops::fetchAndSubOrdered(_q_value, valueToAdd); }
174
175 T fetchAndAndRelaxed(T valueToAdd) noexcept
176 { return Ops::fetchAndAndRelaxed(_q_value, valueToAdd); }
177 T fetchAndAndAcquire(T valueToAdd) noexcept
178 { return Ops::fetchAndAndAcquire(_q_value, valueToAdd); }
179 T fetchAndAndRelease(T valueToAdd) noexcept
180 { return Ops::fetchAndAndRelease(_q_value, valueToAdd); }
181 T fetchAndAndOrdered(T valueToAdd) noexcept
182 { return Ops::fetchAndAndOrdered(_q_value, valueToAdd); }
183
184 T fetchAndOrRelaxed(T valueToAdd) noexcept
185 { return Ops::fetchAndOrRelaxed(_q_value, valueToAdd); }
186 T fetchAndOrAcquire(T valueToAdd) noexcept
187 { return Ops::fetchAndOrAcquire(_q_value, valueToAdd); }
188 T fetchAndOrRelease(T valueToAdd) noexcept
189 { return Ops::fetchAndOrRelease(_q_value, valueToAdd); }
190 T fetchAndOrOrdered(T valueToAdd) noexcept
191 { return Ops::fetchAndOrOrdered(_q_value, valueToAdd); }
192
193 T fetchAndXorRelaxed(T valueToAdd) noexcept
194 { return Ops::fetchAndXorRelaxed(_q_value, valueToAdd); }
195 T fetchAndXorAcquire(T valueToAdd) noexcept
196 { return Ops::fetchAndXorAcquire(_q_value, valueToAdd); }
197 T fetchAndXorRelease(T valueToAdd) noexcept
198 { return Ops::fetchAndXorRelease(_q_value, valueToAdd); }
199 T fetchAndXorOrdered(T valueToAdd) noexcept
200 { return Ops::fetchAndXorOrdered(_q_value, valueToAdd); }
201
202 T operator++() noexcept
203 { return fetchAndAddOrdered(1) + 1; }
204 T operator++(int) noexcept
205 { return fetchAndAddOrdered(1); }
206 T operator--() noexcept
207 { return fetchAndSubOrdered(1) - 1; }
208 T operator--(int) noexcept
209 { return fetchAndSubOrdered(1); }
210
211 T operator+=(T v) noexcept
212 { return fetchAndAddOrdered(v) + v; }
213 T operator-=(T v) noexcept
214 { return fetchAndSubOrdered(v) - v; }
215 T operator&=(T v) noexcept
216 { return fetchAndAndOrdered(v) & v; }
217 T operator|=(T v) noexcept
218 { return fetchAndOrOrdered(v) | v; }
219 T operator^=(T v) noexcept
220 { return fetchAndXorOrdered(v) ^ v; }
221
222
223#ifdef QT_BASIC_ATOMIC_HAS_CONSTRUCTORS
224 QBasicAtomicInteger() = default;
225 constexpr QBasicAtomicInteger(T value) noexcept : _q_value(value) {}
226 QBasicAtomicInteger(const QBasicAtomicInteger &) = delete;
227 QBasicAtomicInteger &operator=(const QBasicAtomicInteger &) = delete;
228 QBasicAtomicInteger &operator=(const QBasicAtomicInteger &) volatile = delete;
229#endif
230};
231typedef QBasicAtomicInteger<int> QBasicAtomicInt;
232
233template <typename X>
234class QBasicAtomicPointer
235{
236public:
237 typedef X *Type;
238 typedef QAtomicOps<Type> Ops;
239 typedef typename Ops::Type AtomicType;
240
241 AtomicType _q_value;
242
243#if QT_DEPRECATED_SINCE(5, 14)
244 QT_DEPRECATED_VERSION_X_5_14("Use loadRelaxed") Type load() const noexcept { return loadRelaxed(); }
245 QT_DEPRECATED_VERSION_X_5_14("Use storeRelaxed") void store(Type newValue) noexcept { storeRelaxed(newValue); }
246#endif
247
248 Type loadRelaxed() const noexcept { return Ops::loadRelaxed(_q_value); }
249 void storeRelaxed(Type newValue) noexcept { Ops::storeRelaxed(_q_value, newValue); }
250
251 operator Type() const noexcept { return loadAcquire(); }
252 Type operator=(Type newValue) noexcept { storeRelease(newValue); return newValue; }
253
254 // Atomic API, implemented in qatomic_XXX.h
255 Type loadAcquire() const noexcept { return Ops::loadAcquire(_q_value); }
256 void storeRelease(Type newValue) noexcept { Ops::storeRelease(_q_value, newValue); }
257
258 static Q_DECL_CONSTEXPR bool isTestAndSetNative() noexcept { return Ops::isTestAndSetNative(); }
259 static Q_DECL_CONSTEXPR bool isTestAndSetWaitFree() noexcept { return Ops::isTestAndSetWaitFree(); }
260
261 bool testAndSetRelaxed(Type expectedValue, Type newValue) noexcept
262 { return Ops::testAndSetRelaxed(_q_value, expectedValue, newValue); }
263 bool testAndSetAcquire(Type expectedValue, Type newValue) noexcept
264 { return Ops::testAndSetAcquire(_q_value, expectedValue, newValue); }
265 bool testAndSetRelease(Type expectedValue, Type newValue) noexcept
266 { return Ops::testAndSetRelease(_q_value, expectedValue, newValue); }
267 bool testAndSetOrdered(Type expectedValue, Type newValue) noexcept
268 { return Ops::testAndSetOrdered(_q_value, expectedValue, newValue); }
269
270 bool testAndSetRelaxed(Type expectedValue, Type newValue, Type &currentValue) noexcept
271 { return Ops::testAndSetRelaxed(_q_value, expectedValue, newValue, &currentValue); }
272 bool testAndSetAcquire(Type expectedValue, Type newValue, Type &currentValue) noexcept
273 { return Ops::testAndSetAcquire(_q_value, expectedValue, newValue, &currentValue); }
274 bool testAndSetRelease(Type expectedValue, Type newValue, Type &currentValue) noexcept
275 { return Ops::testAndSetRelease(_q_value, expectedValue, newValue, &currentValue); }
276 bool testAndSetOrdered(Type expectedValue, Type newValue, Type &currentValue) noexcept
277 { return Ops::testAndSetOrdered(_q_value, expectedValue, newValue, &currentValue); }
278
279 static Q_DECL_CONSTEXPR bool isFetchAndStoreNative() noexcept { return Ops::isFetchAndStoreNative(); }
280 static Q_DECL_CONSTEXPR bool isFetchAndStoreWaitFree() noexcept { return Ops::isFetchAndStoreWaitFree(); }
281
282 Type fetchAndStoreRelaxed(Type newValue) noexcept
283 { return Ops::fetchAndStoreRelaxed(_q_value, newValue); }
284 Type fetchAndStoreAcquire(Type newValue) noexcept
285 { return Ops::fetchAndStoreAcquire(_q_value, newValue); }
286 Type fetchAndStoreRelease(Type newValue) noexcept
287 { return Ops::fetchAndStoreRelease(_q_value, newValue); }
288 Type fetchAndStoreOrdered(Type newValue) noexcept
289 { return Ops::fetchAndStoreOrdered(_q_value, newValue); }
290
291 static Q_DECL_CONSTEXPR bool isFetchAndAddNative() noexcept { return Ops::isFetchAndAddNative(); }
292 static Q_DECL_CONSTEXPR bool isFetchAndAddWaitFree() noexcept { return Ops::isFetchAndAddWaitFree(); }
293
294 Type fetchAndAddRelaxed(qptrdiff valueToAdd) noexcept
295 { return Ops::fetchAndAddRelaxed(_q_value, valueToAdd); }
296 Type fetchAndAddAcquire(qptrdiff valueToAdd) noexcept
297 { return Ops::fetchAndAddAcquire(_q_value, valueToAdd); }
298 Type fetchAndAddRelease(qptrdiff valueToAdd) noexcept
299 { return Ops::fetchAndAddRelease(_q_value, valueToAdd); }
300 Type fetchAndAddOrdered(qptrdiff valueToAdd) noexcept
301 { return Ops::fetchAndAddOrdered(_q_value, valueToAdd); }
302
303 Type fetchAndSubRelaxed(qptrdiff valueToAdd) noexcept
304 { return Ops::fetchAndSubRelaxed(_q_value, valueToAdd); }
305 Type fetchAndSubAcquire(qptrdiff valueToAdd) noexcept
306 { return Ops::fetchAndSubAcquire(_q_value, valueToAdd); }
307 Type fetchAndSubRelease(qptrdiff valueToAdd) noexcept
308 { return Ops::fetchAndSubRelease(_q_value, valueToAdd); }
309 Type fetchAndSubOrdered(qptrdiff valueToAdd) noexcept
310 { return Ops::fetchAndSubOrdered(_q_value, valueToAdd); }
311
312 Type operator++() noexcept
313 { return fetchAndAddOrdered(1) + 1; }
314 Type operator++(int) noexcept
315 { return fetchAndAddOrdered(1); }
316 Type operator--() noexcept
317 { return fetchAndSubOrdered(1) - 1; }
318 Type operator--(int) noexcept
319 { return fetchAndSubOrdered(1); }
320 Type operator+=(qptrdiff valueToAdd) noexcept
321 { return fetchAndAddOrdered(valueToAdd) + valueToAdd; }
322 Type operator-=(qptrdiff valueToSub) noexcept
323 { return fetchAndSubOrdered(valueToSub) - valueToSub; }
324
325#ifdef QT_BASIC_ATOMIC_HAS_CONSTRUCTORS
326 QBasicAtomicPointer() = default;
327 constexpr QBasicAtomicPointer(Type value) noexcept : _q_value(value) {}
328 QBasicAtomicPointer(const QBasicAtomicPointer &) = delete;
329 QBasicAtomicPointer &operator=(const QBasicAtomicPointer &) = delete;
330 QBasicAtomicPointer &operator=(const QBasicAtomicPointer &) volatile = delete;
331#endif
332};
333
334#ifndef Q_BASIC_ATOMIC_INITIALIZER
335# define Q_BASIC_ATOMIC_INITIALIZER(a) { (a) }
336#endif
337
338QT_END_NAMESPACE
339
340QT_WARNING_POP
341
342#endif // QBASICATOMIC_H
343

source code of qtbase/src/corelib/thread/qbasicatomic.h