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qmutex.cpp

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1/****************************************************************************-
2**-
3** Copyright (C) 2016 The Qt Company Ltd.-
4** Copyright (C) 2016 Intel Corporation.-
5** Copyright (C) 2012 Olivier Goffart <ogoffart@woboq.com>-
6** Contact: https://www.qt.io/licensing/-
7**-
8** This file is part of the QtCore module of the Qt Toolkit.-
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37**-
38** $QT_END_LICENSE$-
39**-
40****************************************************************************/-
41-
42#include "qplatformdefs.h"-
43#include "qmutex.h"-
44#include <qdebug.h>-
45-
46#ifndef QT_NO_THREAD-
47#include "qatomic.h"-
48#include "qelapsedtimer.h"-
49#include "qthread.h"-
50#include "qmutex_p.h"-
51#include "qtypetraits.h"-
52-
53#ifndef QT_LINUX_FUTEX-
54#include "private/qfreelist_p.h"-
55#endif-
56-
57QT_BEGIN_NAMESPACE-
58-
59static inline bool isRecursive(QMutexData *d)-
60{-
61 quintptr u = quintptr(d);-
62 if (Q_LIKELY(u <= 0x3))
__builtin_expe...<= 0x3), true)Description
TRUEevaluated 30482927 times by 1013 tests
Evaluated by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
FALSEevaluated 9959019 times by 765 tests
Evaluated by:
  • tst_Gestures
  • tst_Lancelot
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBrush
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QClipboard
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  • ...
9959019-30482927
63 return false;
executed 30482927 times by 1013 tests: return false;
Executed by:
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  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
30482927
64#ifdef QT_LINUX_FUTEX-
65 Q_ASSERT(d->recursive);-
66 return true;
executed 9959019 times by 765 tests: return true;
Executed by:
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  • tst_ModelTest
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  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBrush
  • tst_QButtonGroup
  • tst_QCalendarWidget
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  • ...
9959019
67#else-
68 return d->recursive;-
69#endif-
70}-
71-
72class QRecursiveMutexPrivate : public QMutexData-
73{-
74public:-
75 QRecursiveMutexPrivate()-
76 : QMutexData(QMutex::Recursive), owner(0), count(0) {}
executed 5840 times by 330 tests: end of block
Executed by:
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  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractButton
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QColorDialog
  • tst_QColumnView
  • tst_QComboBox
  • ...
5840
77-
78 // written to by the thread that first owns 'mutex';-
79 // read during attempts to acquire ownership of 'mutex' from any other thread:-
80 QAtomicPointer<QtPrivate::remove_pointer<Qt::HANDLE>::type> owner;-
81-
82 // only ever accessed from the thread that owns 'mutex':-
83 uint count;-
84-
85 QMutex mutex;-
86-
87 bool lock(int timeout) QT_MUTEX_LOCK_NOEXCEPT;-
88 void unlock() Q_DECL_NOTHROW;-
89};-
90-
91/*-
92 \class QBasicMutex-
93 \inmodule QtCore-
94 \brief QMutex POD-
95 \internal-
96-
97 \ingroup thread-
98-
99 - Can be used as global static object.-
100 - Always non-recursive-
101 - Do not use tryLock with timeout > 0, else you can have a leak (see the ~QMutex destructor)-
102*/-
103-
104/*!-
105 \class QMutex-
106 \inmodule QtCore-
107 \brief The QMutex class provides access serialization between threads.-
108-
109 \threadsafe-
110-
111 \ingroup thread-
112-
113 The purpose of a QMutex is to protect an object, data structure or-
114 section of code so that only one thread can access it at a time-
115 (this is similar to the Java \c synchronized keyword). It is-
116 usually best to use a mutex with a QMutexLocker since this makes-
117 it easy to ensure that locking and unlocking are performed-
118 consistently.-
119-
120 For example, say there is a method that prints a message to the-
121 user on two lines:-
122-
123 \snippet code/src_corelib_thread_qmutex.cpp 0-
124-
125 If these two methods are called in succession, the following happens:-
126-
127 \snippet code/src_corelib_thread_qmutex.cpp 1-
128-
129 If these two methods are called simultaneously from two threads then the-
130 following sequence could result:-
131-
132 \snippet code/src_corelib_thread_qmutex.cpp 2-
133-
134 If we add a mutex, we should get the result we want:-
135-
136 \snippet code/src_corelib_thread_qmutex.cpp 3-
137-
138 Then only one thread can modify \c number at any given time and-
139 the result is correct. This is a trivial example, of course, but-
140 applies to any other case where things need to happen in a-
141 particular sequence.-
142-
143 When you call lock() in a thread, other threads that try to call-
144 lock() in the same place will block until the thread that got the-
145 lock calls unlock(). A non-blocking alternative to lock() is-
146 tryLock().-
147-
148 QMutex is optimized to be fast in the non-contended case. A non-recursive-
149 QMutex will not allocate memory if there is no contention on that mutex.-
150 It is constructed and destroyed with almost no overhead,-
151 which means it is fine to have many mutexes as part of other classes.-
152-
153 \sa QMutexLocker, QReadWriteLock, QSemaphore, QWaitCondition-
154*/-
155-
156/*!-
157 \enum QMutex::RecursionMode-
158-
159 \value Recursive In this mode, a thread can lock the same mutex-
160 multiple times and the mutex won't be unlocked-
161 until a corresponding number of unlock() calls-
162 have been made.-
163-
164 \value NonRecursive In this mode, a thread may only lock a mutex-
165 once.-
166-
167 \sa QMutex()-
168*/-
169-
170/*!-
171 Constructs a new mutex. The mutex is created in an unlocked state.-
172-
173 If \a mode is QMutex::Recursive, a thread can lock the same mutex-
174 multiple times and the mutex won't be unlocked until a-
175 corresponding number of unlock() calls have been made. Otherwise-
176 a thread may only lock a mutex once. The default is-
177 QMutex::NonRecursive.-
178-
179 Recursive mutexes are slower and take more memory than non-recursive ones.-
180-
181 \sa lock(), unlock()-
182*/-
183QMutex::QMutex(RecursionMode mode)-
184{-
185 d_ptr.store(mode == Recursive ? new QRecursiveMutexPrivate : 0);-
186}
executed 2696437 times by 909 tests: end of block
Executed by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
2696437
187-
188/*!-
189 Destroys the mutex.-
190-
191 \warning Destroying a locked mutex may result in undefined behavior.-
192*/-
193QMutex::~QMutex()-
194{-
195 QMutexData *d = d_ptr.load();-
196 if (isRecursive()) {
isRecursive()Description
TRUEevaluated 5435 times by 552 tests
Evaluated by:
  • tst_NetworkSelfTest
  • tst_QAbstractNetworkCache
  • tst_QApplication
  • tst_QDBusAbstractInterface
  • tst_QDBusConnection
  • tst_QDBusConnection_NoApplication
  • tst_QDBusConnection_SpyHook
  • tst_QDBusServiceWatcher
  • tst_QDBusThreading
  • tst_QFontCache
  • tst_QFontDatabase
  • tst_QFontDialog
  • tst_QFontMetrics
  • tst_QFtp
  • tst_QGLBuffer
  • tst_QGLFunctions
  • tst_QGLThreads
  • tst_QGlyphRun
  • tst_QGraphicsView
  • tst_QGuiApplication
  • tst_QHostInfo
  • tst_QHttpNetworkConnection
  • tst_QMdiArea
  • tst_QMutex
  • tst_QMutexLocker
  • ...
FALSEevaluated 2691914 times by 756 tests
Evaluated by:
  • tst_Gestures
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QAtomicInt
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QColorDialog
  • tst_QColumnView
  • tst_QComboBox
  • tst_QCommandLinkButton
  • tst_QCompleter
  • ...
5435-2691914
197 delete static_cast<QRecursiveMutexPrivate *>(d);-
198 } else if (d) {
executed 5435 times by 552 tests: end of block
Executed by:
  • tst_NetworkSelfTest
  • tst_QAbstractNetworkCache
  • tst_QApplication
  • tst_QDBusAbstractInterface
  • tst_QDBusConnection
  • tst_QDBusConnection_NoApplication
  • tst_QDBusConnection_SpyHook
  • tst_QDBusServiceWatcher
  • tst_QDBusThreading
  • tst_QFontCache
  • tst_QFontDatabase
  • tst_QFontDialog
  • tst_QFontMetrics
  • tst_QFtp
  • tst_QGLBuffer
  • tst_QGLFunctions
  • tst_QGLThreads
  • tst_QGlyphRun
  • tst_QGraphicsView
  • tst_QGuiApplication
  • tst_QHostInfo
  • tst_QHttpNetworkConnection
  • tst_QMdiArea
  • tst_QMutex
  • tst_QMutexLocker
  • ...
dDescription
TRUEnever evaluated
FALSEevaluated 2691914 times by 756 tests
Evaluated by:
  • tst_Gestures
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QAtomicInt
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QColorDialog
  • tst_QColumnView
  • tst_QComboBox
  • tst_QCommandLinkButton
  • tst_QCompleter
  • ...
0-2691914
199#ifndef QT_LINUX_FUTEX-
200 if (d != dummyLocked() && static_cast<QMutexPrivate *>(d)->possiblyUnlocked.load()-
201 && tryLock()) {-
202 unlock();-
203 return;-
204 }-
205#endif-
206 qWarning("QMutex: destroying locked mutex");-
207 }
never executed: end of block
0
208}
executed 2697349 times by 756 tests: end of block
Executed by:
  • tst_Gestures
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QAtomicInt
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QColorDialog
  • tst_QColumnView
  • tst_QComboBox
  • tst_QCommandLinkButton
  • tst_QCompleter
  • ...
2697349
209-
210/*! \fn void QMutex::lock()-
211 Locks the mutex. If another thread has locked the mutex then this-
212 call will block until that thread has unlocked it.-
213-
214 Calling this function multiple times on the same mutex from the-
215 same thread is allowed if this mutex is a-
216 \l{QMutex::Recursive}{recursive mutex}. If this mutex is a-
217 \l{QMutex::NonRecursive}{non-recursive mutex}, this function will-
218 \e dead-lock when the mutex is locked recursively.-
219-
220 \sa unlock()-
221*/-
222void QMutex::lock() QT_MUTEX_LOCK_NOEXCEPT-
223{-
224 QMutexData *current;-
225 if (fastTryLock(current))
fastTryLock(current)Description
TRUEevaluated 56203761 times by 1013 tests
Evaluated by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
FALSEevaluated 8853562 times by 961 tests
Evaluated by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
8853562-56203761
226 return;
executed 56203762 times by 1013 tests: return;
Executed by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
56203762
227 if (QT_PREPEND_NAMESPACE(isRecursive)(current))
::isRecursive(current)Description
TRUEevaluated 4970977 times by 548 tests
Evaluated by:
  • tst_Gestures
  • tst_Lancelot
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBrush
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QClipboard
  • tst_QColorDialog
  • ...
FALSEevaluated 3882585 times by 934 tests
Evaluated by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
3882585-4970977
228 static_cast<QRecursiveMutexPrivate *>(current)->lock(-1);
executed 4970977 times by 548 tests: static_cast<QRecursiveMutexPrivate *>(current)->lock(-1);
Executed by:
  • tst_Gestures
  • tst_Lancelot
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBrush
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QClipboard
  • tst_QColorDialog
  • ...
4970977
229 else-
230 lockInternal();
executed 3882585 times by 934 tests: lockInternal();
Executed by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
3882585
231}-
232-
233/*! \fn bool QMutex::tryLock(int timeout)-
234-
235 Attempts to lock the mutex. This function returns \c true if the lock-
236 was obtained; otherwise it returns \c false. If another thread has-
237 locked the mutex, this function will wait for at most \a timeout-
238 milliseconds for the mutex to become available.-
239-
240 Note: Passing a negative number as the \a timeout is equivalent to-
241 calling lock(), i.e. this function will wait forever until mutex-
242 can be locked if \a timeout is negative.-
243-
244 If the lock was obtained, the mutex must be unlocked with unlock()-
245 before another thread can successfully lock it.-
246-
247 Calling this function multiple times on the same mutex from the-
248 same thread is allowed if this mutex is a-
249 \l{QMutex::Recursive}{recursive mutex}. If this mutex is a-
250 \l{QMutex::NonRecursive}{non-recursive mutex}, this function will-
251 \e always return false when attempting to lock the mutex-
252 recursively.-
253-
254 \sa lock(), unlock()-
255*/-
256bool QMutex::tryLock(int timeout) QT_MUTEX_LOCK_NOEXCEPT-
257{-
258 QMutexData *current;-
259 if (fastTryLock(current))
fastTryLock(current)Description
TRUEevaluated 2843175 times by 476 tests
Evaluated by:
  • tst_Gestures
  • tst_Lancelot
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBuffer
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QColorDialog
  • tst_QColumnView
  • ...
FALSEevaluated 275292 times by 22 tests
Evaluated by:
  • tst_QAbstractFileEngine
  • tst_QDBusAbstractInterface
  • tst_QDBusConnection
  • tst_QDBusConnection_SpyHook
  • tst_QDirIterator
  • tst_QDnsLookup
  • tst_QDnsLookup_Appless
  • tst_QFile
  • tst_QHostInfo
  • tst_QHttpSocketEngine
  • tst_QMetaType
  • tst_QMutex
  • tst_QMutexLocker
  • tst_QNetworkDiskCache
  • tst_QNetworkReply
  • tst_QObject
  • tst_QReadWriteLock
  • tst_QWaitCondition
  • tst_Spdy
  • tst_qabstractfileengine - unknown status
  • tst_qdiriterator - unknown status
  • tst_qfile - unknown status
275292-2843175
260 return true;
executed 2843175 times by 476 tests: return true;
Executed by:
  • tst_Gestures
  • tst_Lancelot
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBuffer
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QColorDialog
  • tst_QColumnView
  • ...
2843175
261 if (QT_PREPEND_NAMESPACE(isRecursive)(current))
::isRecursive(current)Description
TRUEevaluated 10819 times by 2 tests
Evaluated by:
  • tst_QMutex
  • tst_QMutexLocker
FALSEevaluated 264473 times by 22 tests
Evaluated by:
  • tst_QAbstractFileEngine
  • tst_QDBusAbstractInterface
  • tst_QDBusConnection
  • tst_QDBusConnection_SpyHook
  • tst_QDirIterator
  • tst_QDnsLookup
  • tst_QDnsLookup_Appless
  • tst_QFile
  • tst_QHostInfo
  • tst_QHttpSocketEngine
  • tst_QMetaType
  • tst_QMutex
  • tst_QMutexLocker
  • tst_QNetworkDiskCache
  • tst_QNetworkReply
  • tst_QObject
  • tst_QReadWriteLock
  • tst_QWaitCondition
  • tst_Spdy
  • tst_qabstractfileengine - unknown status
  • tst_qdiriterator - unknown status
  • tst_qfile - unknown status
10819-264473
262 return static_cast<QRecursiveMutexPrivate *>(current)->lock(timeout);
executed 10819 times by 2 tests: return static_cast<QRecursiveMutexPrivate *>(current)->lock(timeout);
Executed by:
  • tst_QMutex
  • tst_QMutexLocker
10819
263 else-
264 return lockInternal(timeout);
executed 264473 times by 22 tests: return lockInternal(timeout);
Executed by:
  • tst_QAbstractFileEngine
  • tst_QDBusAbstractInterface
  • tst_QDBusConnection
  • tst_QDBusConnection_SpyHook
  • tst_QDirIterator
  • tst_QDnsLookup
  • tst_QDnsLookup_Appless
  • tst_QFile
  • tst_QHostInfo
  • tst_QHttpSocketEngine
  • tst_QMetaType
  • tst_QMutex
  • tst_QMutexLocker
  • tst_QNetworkDiskCache
  • tst_QNetworkReply
  • tst_QObject
  • tst_QReadWriteLock
  • tst_QWaitCondition
  • tst_Spdy
  • tst_qabstractfileengine - unknown status
  • tst_qdiriterator - unknown status
  • tst_qfile - unknown status
264473
265}-
266-
267/*! \fn void QMutex::unlock()-
268 Unlocks the mutex. Attempting to unlock a mutex in a different-
269 thread to the one that locked it results in an error. Unlocking a-
270 mutex that is not locked results in undefined behavior.-
271-
272 \sa lock()-
273*/-
274void QMutex::unlock() Q_DECL_NOTHROW-
275{-
276 QMutexData *current;-
277 if (fastTryUnlock(current))
fastTryUnlock(current)Description
TRUEevaluated 55159975 times by 1013 tests
Evaluated by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
FALSEevaluated 12735038 times by 961 tests
Evaluated by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
12735038-55159975
278 return;
executed 55166884 times by 1013 tests: return;
Executed by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
55166884
279 if (QT_PREPEND_NAMESPACE(isRecursive)(current))
::isRecursive(current)Description
TRUEevaluated 4971788 times by 548 tests
Evaluated by:
  • tst_Gestures
  • tst_Lancelot
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBrush
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QClipboard
  • tst_QColorDialog
  • ...
FALSEevaluated 7763250 times by 934 tests
Evaluated by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
4971788-7763250
280 static_cast<QRecursiveMutexPrivate *>(current)->unlock();
executed 4971788 times by 548 tests: static_cast<QRecursiveMutexPrivate *>(current)->unlock();
Executed by:
  • tst_Gestures
  • tst_Lancelot
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBrush
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QClipboard
  • tst_QColorDialog
  • ...
4971788
281 else-
282 unlockInternal();
executed 7763250 times by 934 tests: unlockInternal();
Executed by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
7763250
283}-
284-
285bool QBasicMutex::isRecursive() Q_DECL_NOTHROW-
286{-
287 return QT_PREPEND_NAMESPACE(isRecursive)(d_ptr.loadAcquire());
executed 11911224 times by 934 tests: return ::isRecursive(d_ptr.loadAcquire());
Executed by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
11911224
288}-
289-
290/*!-
291 \overload-
292 \since 5.7-
293-
294 Returns \c true if the mutex is recursive-
295*/-
296bool QBasicMutex::isRecursive() const Q_DECL_NOTHROW-
297{-
298 return QT_PREPEND_NAMESPACE(isRecursive)(d_ptr.loadAcquire());
executed 6666830 times by 1013 tests: return ::isRecursive(d_ptr.loadAcquire());
Executed by:
  • tst_Collections
  • tst_Compiler
  • tst_Gestures
  • tst_Lancelot
  • tst_LargeFile
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_PlatformSocketEngine
  • tst_QAbstractAnimation
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemModel
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractProxyModel
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSocket
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QAlgorithms
  • ...
6666830
299}-
300-
301/*!-
302 \class QMutexLocker-
303 \inmodule QtCore-
304 \brief The QMutexLocker class is a convenience class that simplifies-
305 locking and unlocking mutexes.-
306-
307 \threadsafe-
308-
309 \ingroup thread-
310-
311 Locking and unlocking a QMutex in complex functions and-
312 statements or in exception handling code is error-prone and-
313 difficult to debug. QMutexLocker can be used in such situations-
314 to ensure that the state of the mutex is always well-defined.-
315-
316 QMutexLocker should be created within a function where a-
317 QMutex needs to be locked. The mutex is locked when QMutexLocker-
318 is created. You can unlock and relock the mutex with \c unlock()-
319 and \c relock(). If locked, the mutex will be unlocked when the-
320 QMutexLocker is destroyed.-
321-
322 For example, this complex function locks a QMutex upon entering-
323 the function and unlocks the mutex at all the exit points:-
324-
325 \snippet code/src_corelib_thread_qmutex.cpp 4-
326-
327 This example function will get more complicated as it is-
328 developed, which increases the likelihood that errors will occur.-
329-
330 Using QMutexLocker greatly simplifies the code, and makes it more-
331 readable:-
332-
333 \snippet code/src_corelib_thread_qmutex.cpp 5-
334-
335 Now, the mutex will always be unlocked when the QMutexLocker-
336 object is destroyed (when the function returns since \c locker is-
337 an auto variable).-
338-
339 The same principle applies to code that throws and catches-
340 exceptions. An exception that is not caught in the function that-
341 has locked the mutex has no way of unlocking the mutex before the-
342 exception is passed up the stack to the calling function.-
343-
344 QMutexLocker also provides a \c mutex() member function that returns-
345 the mutex on which the QMutexLocker is operating. This is useful-
346 for code that needs access to the mutex, such as-
347 QWaitCondition::wait(). For example:-
348-
349 \snippet code/src_corelib_thread_qmutex.cpp 6-
350-
351 \sa QReadLocker, QWriteLocker, QMutex-
352*/-
353-
354/*!-
355 \fn QMutexLocker::QMutexLocker(QMutex *mutex)-
356-
357 Constructs a QMutexLocker and locks \a mutex. The mutex will be-
358 unlocked when the QMutexLocker is destroyed. If \a mutex is zero,-
359 QMutexLocker does nothing.-
360-
361 \sa QMutex::lock()-
362*/-
363-
364/*!-
365 \fn QMutexLocker::~QMutexLocker()-
366-
367 Destroys the QMutexLocker and unlocks the mutex that was locked-
368 in the constructor.-
369-
370 \sa QMutex::unlock()-
371*/-
372-
373/*!-
374 \fn void QMutexLocker::unlock()-
375-
376 Unlocks this mutex locker. You can use \c relock() to lock-
377 it again. It does not need to be locked when destroyed.-
378-
379 \sa relock()-
380*/-
381-
382/*!-
383 \fn void QMutexLocker::relock()-
384-
385 Relocks an unlocked mutex locker.-
386-
387 \sa unlock()-
388*/-
389-
390/*!-
391 \fn QMutex *QMutexLocker::mutex() const-
392-
393 Returns the mutex on which the QMutexLocker is operating.-
394-
395*/-
396-
397#ifndef QT_LINUX_FUTEX //linux implementation is in qmutex_linux.cpp-
398-
399/*-
400 For a rough introduction on how this works, refer to-
401 http://woboq.com/blog/internals-of-qmutex-in-qt5.html-
402 which explains a slightly simplified version of it.-
403 The differences are that here we try to work with timeout (requires the-
404 possiblyUnlocked flag) and that we only wake one thread when unlocking-
405 (requires maintaining the waiters count)-
406 We also support recursive mutexes which always have a valid d_ptr.-
407-
408 The waiters flag represents the number of threads that are waiting or about-
409 to wait on the mutex. There are two tricks to keep in mind:-
410 We don't want to increment waiters after we checked no threads are waiting-
411 (waiters == 0). That's why we atomically set the BigNumber flag on waiters when-
412 we check waiters. Similarly, if waiters is decremented right after we checked,-
413 the mutex would be unlocked (d->wakeUp() has (or will) be called), but there is-
414 no thread waiting. This is only happening if there was a timeout in tryLock at the-
415 same time as the mutex is unlocked. So when there was a timeout, we set the-
416 possiblyUnlocked flag.-
417*/-
418-
419/*!-
420 \internal helper for lock()-
421 */-
422void QBasicMutex::lockInternal() QT_MUTEX_LOCK_NOEXCEPT-
423{-
424 lockInternal(-1);-
425}-
426-
427/*!-
428 \internal helper for lock(int)-
429 */-
430bool QBasicMutex::lockInternal(int timeout) QT_MUTEX_LOCK_NOEXCEPT-
431{-
432 Q_ASSERT(!isRecursive());-
433-
434 while (!fastTryLock()) {-
435 QMutexData *copy = d_ptr.loadAcquire();-
436 if (!copy) // if d is 0, the mutex is unlocked-
437 continue;-
438-
439 if (copy == dummyLocked()) {-
440 if (timeout == 0)-
441 return false;-
442 // The mutex is locked but does not have a QMutexPrivate yet.-
443 // we need to allocate a QMutexPrivate-
444 QMutexPrivate *newD = QMutexPrivate::allocate();-
445 if (!d_ptr.testAndSetOrdered(dummyLocked(), newD)) {-
446 //Either the mutex is already unlocked, or another thread already set it.-
447 newD->deref();-
448 continue;-
449 }-
450 copy = newD;-
451 //the d->refCount is already 1 the deref will occurs when we unlock-
452 }-
453-
454 QMutexPrivate *d = static_cast<QMutexPrivate *>(copy);-
455 if (timeout == 0 && !d->possiblyUnlocked.load())-
456 return false;-
457-
458 // At this point we have a pointer to a QMutexPrivate. But the other thread-
459 // may unlock the mutex at any moment and release the QMutexPrivate to the pool.-
460 // We will try to reference it to avoid unlock to release it to the pool to make-
461 // sure it won't be released. But if the refcount is already 0 it has been released.-
462 if (!d->ref())-
463 continue; //that QMutexData was already released-
464-
465 // We now hold a reference to the QMutexPrivate. It won't be released and re-used.-
466 // But it is still possible that it was already re-used by another QMutex right before-
467 // we did the ref(). So check if we still hold a pointer to the right mutex.-
468 if (d != d_ptr.loadAcquire()) {-
469 //Either the mutex is already unlocked, or relocked with another mutex-
470 d->deref();-
471 continue;-
472 }-
473-
474 // In this part, we will try to increment the waiters count.-
475 // We just need to take care of the case in which the old_waiters-
476 // is set to the BigNumber magic value set in unlockInternal()-
477 int old_waiters;-
478 do {-
479 old_waiters = d->waiters.load();-
480 if (old_waiters == -QMutexPrivate::BigNumber) {-
481 // we are unlocking, and the thread that unlocks is about to change d to 0-
482 // we try to acquire the mutex by changing to dummyLocked()-
483 if (d_ptr.testAndSetAcquire(d, dummyLocked())) {-
484 // Mutex acquired-
485 d->deref();-
486 return true;-
487 } else {-
488 Q_ASSERT(d != d_ptr.load()); //else testAndSetAcquire should have succeeded-
489 // Mutex is likely to bo 0, we should continue the outer-loop,-
490 // set old_waiters to the magic value of BigNumber-
491 old_waiters = QMutexPrivate::BigNumber;-
492 break;-
493 }-
494 }-
495 } while (!d->waiters.testAndSetRelaxed(old_waiters, old_waiters + 1));-
496-
497 if (d != d_ptr.loadAcquire()) {-
498 // The mutex was unlocked before we incremented waiters.-
499 if (old_waiters != QMutexPrivate::BigNumber) {-
500 //we did not break the previous loop-
501 Q_ASSERT(d->waiters.load() >= 1);-
502 d->waiters.deref();-
503 }-
504 d->deref();-
505 continue;-
506 }-
507-
508 if (d->wait(timeout)) {-
509 // reset the possiblyUnlocked flag if needed (and deref its corresponding reference)-
510 if (d->possiblyUnlocked.load() && d->possiblyUnlocked.testAndSetRelaxed(true, false))-
511 d->deref();-
512 d->derefWaiters(1);-
513 //we got the lock. (do not deref)-
514 Q_ASSERT(d == d_ptr.load());-
515 return true;-
516 } else {-
517 Q_ASSERT(timeout >= 0);-
518 //timeout-
519 d->derefWaiters(1);-
520 //There may be a race in which the mutex is unlocked right after we timed out,-
521 // and before we deref the waiters, so maybe the mutex is actually unlocked.-
522 // Set the possiblyUnlocked flag to indicate this possibility.-
523 if (!d->possiblyUnlocked.testAndSetRelaxed(false, true)) {-
524 // We keep a reference when possiblyUnlocked is true.-
525 // but if possiblyUnlocked was already true, we don't need to keep the reference.-
526 d->deref();-
527 }-
528 return false;-
529 }-
530 }-
531 Q_ASSERT(d_ptr.load() != 0);-
532 return true;-
533}-
534-
535/*!-
536 \internal-
537*/-
538void QBasicMutex::unlockInternal() Q_DECL_NOTHROW-
539{-
540 QMutexData *copy = d_ptr.loadAcquire();-
541 Q_ASSERT(copy); //we must be locked-
542 Q_ASSERT(copy != dummyLocked()); // testAndSetRelease(dummyLocked(), 0) failed-
543 Q_ASSERT(!isRecursive());-
544-
545 QMutexPrivate *d = reinterpret_cast<QMutexPrivate *>(copy);-
546-
547 // If no one is waiting for the lock anymore, we should reset d to 0x0.-
548 // Using fetchAndAdd, we atomically check that waiters was equal to 0, and add a flag-
549 // to the waiters variable (BigNumber). That way, we avoid the race in which waiters is-
550 // incremented right after we checked, because we won't increment waiters if is-
551 // equal to -BigNumber-
552 if (d->waiters.fetchAndAddRelease(-QMutexPrivate::BigNumber) == 0) {-
553 //there is no one waiting on this mutex anymore, set the mutex as unlocked (d = 0)-
554 if (d_ptr.testAndSetRelease(d, 0)) {-
555 // reset the possiblyUnlocked flag if needed (and deref its corresponding reference)-
556 if (d->possiblyUnlocked.load() && d->possiblyUnlocked.testAndSetRelaxed(true, false))-
557 d->deref();-
558 }-
559 d->derefWaiters(0);-
560 } else {-
561 d->derefWaiters(0);-
562 //there are thread waiting, transfer the lock.-
563 d->wakeUp();-
564 }-
565 d->deref();-
566}-
567-
568//The freelist management-
569namespace {-
570struct FreeListConstants : QFreeListDefaultConstants {-
571 enum { BlockCount = 4, MaxIndex=0xffff };-
572 static const int Sizes[BlockCount];-
573};-
574const int FreeListConstants::Sizes[FreeListConstants::BlockCount] = {-
575 16,-
576 128,-
577 1024,-
578 FreeListConstants::MaxIndex - (16-128-1024)-
579};-
580-
581typedef QFreeList<QMutexPrivate, FreeListConstants> FreeList;-
582// We cannot use Q_GLOBAL_STATIC because it uses QMutex-
583static FreeList freeList_;-
584FreeList *freelist()-
585{-
586 return &freeList_;-
587}-
588}-
589-
590QMutexPrivate *QMutexPrivate::allocate()-
591{-
592 int i = freelist()->next();-
593 QMutexPrivate *d = &(*freelist())[i];-
594 d->id = i;-
595 Q_ASSERT(d->refCount.load() == 0);-
596 Q_ASSERT(!d->recursive);-
597 Q_ASSERT(!d->possiblyUnlocked.load());-
598 Q_ASSERT(d->waiters.load() == 0);-
599 d->refCount.store(1);-
600 return d;-
601}-
602-
603void QMutexPrivate::release()-
604{-
605 Q_ASSERT(!recursive);-
606 Q_ASSERT(refCount.load() == 0);-
607 Q_ASSERT(!possiblyUnlocked.load());-
608 Q_ASSERT(waiters.load() == 0);-
609 freelist()->release(id);-
610}-
611-
612// atomically subtract "value" to the waiters, and remove the QMutexPrivate::BigNumber flag-
613void QMutexPrivate::derefWaiters(int value) Q_DECL_NOTHROW-
614{-
615 int old_waiters;-
616 int new_waiters;-
617 do {-
618 old_waiters = waiters.load();-
619 new_waiters = old_waiters;-
620 if (new_waiters < 0) {-
621 new_waiters += QMutexPrivate::BigNumber;-
622 }-
623 new_waiters -= value;-
624 } while (!waiters.testAndSetRelaxed(old_waiters, new_waiters));-
625}-
626#endif-
627-
628/*!-
629 \internal-
630 */-
631inline bool QRecursiveMutexPrivate::lock(int timeout) QT_MUTEX_LOCK_NOEXCEPT-
632{-
633 Qt::HANDLE self = QThread::currentThreadId();-
634 if (owner.load() == self) {
owner.load() == selfDescription
TRUEevaluated 18490 times by 347 tests
Evaluated by:
  • tst_Gestures
  • tst_Lancelot
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QColorDialog
  • tst_QColumnView
  • tst_QComboBox
  • tst_QCommandLinkButton
  • tst_QCompleter
  • ...
FALSEevaluated 4963306 times by 548 tests
Evaluated by:
  • tst_Gestures
  • tst_Lancelot
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBrush
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QClipboard
  • tst_QColorDialog
  • ...
18490-4963306
635 ++count;-
636 Q_ASSERT_X(count != 0, "QMutex::lock", "Overflow in recursion counter");-
637 return true;
executed 18490 times by 347 tests: return true;
Executed by:
  • tst_Gestures
  • tst_Lancelot
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QColorDialog
  • tst_QColumnView
  • tst_QComboBox
  • tst_QCommandLinkButton
  • tst_QCompleter
  • ...
18490
638 }-
639 bool success = true;-
640 if (timeout == -1) {
timeout == -1Description
TRUEevaluated 4953090 times by 548 tests
Evaluated by:
  • tst_Gestures
  • tst_Lancelot
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBrush
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QClipboard
  • tst_QColorDialog
  • ...
FALSEevaluated 10216 times by 2 tests
Evaluated by:
  • tst_QMutex
  • tst_QMutexLocker
10216-4953090
641 mutex.QBasicMutex::lock();-
642 } else {
executed 4953090 times by 548 tests: end of block
Executed by:
  • tst_Gestures
  • tst_Lancelot
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBrush
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QClipboard
  • tst_QColorDialog
  • ...
4953090
643 success = mutex.tryLock(timeout);-
644 }
executed 10216 times by 2 tests: end of block
Executed by:
  • tst_QMutex
  • tst_QMutexLocker
10216
645-
646 if (success)
successDescription
TRUEevaluated 4953298 times by 548 tests
Evaluated by:
  • tst_Gestures
  • tst_Lancelot
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBrush
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QClipboard
  • tst_QColorDialog
  • ...
FALSEevaluated 10008 times by 2 tests
Evaluated by:
  • tst_QMutex
  • tst_QMutexLocker
10008-4953298
647 owner.store(self);
executed 4953298 times by 548 tests: owner.store(self);
Executed by:
  • tst_Gestures
  • tst_Lancelot
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBrush
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QClipboard
  • tst_QColorDialog
  • ...
4953298
648 return success;
executed 4963306 times by 548 tests: return success;
Executed by:
  • tst_Gestures
  • tst_Lancelot
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBrush
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QClipboard
  • tst_QColorDialog
  • ...
4963306
649}-
650-
651/*!-
652 \internal-
653 */-
654inline void QRecursiveMutexPrivate::unlock() Q_DECL_NOTHROW-
655{-
656 if (count > 0) {
count > 0Description
TRUEevaluated 18490 times by 347 tests
Evaluated by:
  • tst_Gestures
  • tst_Lancelot
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QColorDialog
  • tst_QColumnView
  • tst_QComboBox
  • tst_QCommandLinkButton
  • tst_QCompleter
  • ...
FALSEevaluated 4953298 times by 548 tests
Evaluated by:
  • tst_Gestures
  • tst_Lancelot
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBrush
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QClipboard
  • tst_QColorDialog
  • ...
18490-4953298
657 count--;-
658 } else {
executed 18490 times by 347 tests: end of block
Executed by:
  • tst_Gestures
  • tst_Lancelot
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QColorDialog
  • tst_QColumnView
  • tst_QComboBox
  • tst_QCommandLinkButton
  • tst_QCompleter
  • ...
18490
659 owner.store(0);-
660 mutex.QBasicMutex::unlock();-
661 }
executed 4953298 times by 548 tests: end of block
Executed by:
  • tst_Gestures
  • tst_Lancelot
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractFileEngine
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractPrintDialog
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAbstractTextDocumentLayout
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBrush
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QClipboard
  • tst_QColorDialog
  • ...
4953298
662}-
663-
664QT_END_NAMESPACE-
665-
666#ifdef QT_LINUX_FUTEX-
667# include "qmutex_linux.cpp"-
668#elif defined(Q_OS_MAC)-
669# include "qmutex_mac.cpp"-
670#elif defined(Q_OS_WIN)-
671# include "qmutex_win.cpp"-
672#else-
673# include "qmutex_unix.cpp"-
674#endif-
675-
676#endif // QT_NO_THREAD-
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