qeventloop.cpp

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1/****************************************************************************-
2**-
3** Copyright (C) 2016 The Qt Company Ltd.-
4** Contact: https://www.qt.io/licensing/-
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6** This file is part of the QtCore module of the Qt Toolkit.-
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38****************************************************************************/-
39-
40#include "qeventloop.h"-
41-
42#include "qabstracteventdispatcher.h"-
43#include "qcoreapplication.h"-
44#include "qcoreapplication_p.h"-
45#include "qelapsedtimer.h"-
46-
47#include "qobject_p.h"-
48#include "qeventloop_p.h"-
49#include <private/qthread_p.h>-
50-
51QT_BEGIN_NAMESPACE-
52-
53/*!-
54 \class QEventLoop-
55 \inmodule QtCore-
56 \brief The QEventLoop class provides a means of entering and leaving an event loop.-
57-
58 At any time, you can create a QEventLoop object and call exec()-
59 on it to start a local event loop. From within the event loop,-
60 calling exit() will force exec() to return.-
61-
62 \sa QAbstractEventDispatcher-
63*/-
64-
65/*!-
66 \enum QEventLoop::ProcessEventsFlag-
67-
68 This enum controls the types of events processed by the-
69 processEvents() functions.-
70-
71 \value AllEvents All events. Note that-
72 \l{QEvent::DeferredDelete}{DeferredDelete} events are processed-
73 specially. See QObject::deleteLater() for more details.-
74-
75 \value ExcludeUserInputEvents Do not process user input events,-
76 such as ButtonPress and KeyPress. Note that the events are not-
77 discarded; they will be delivered the next time processEvents() is-
78 called without the ExcludeUserInputEvents flag.-
79-
80 \value ExcludeSocketNotifiers Do not process socket notifier-
81 events. Note that the events are not discarded; they will be-
82 delivered the next time processEvents() is called without the-
83 ExcludeSocketNotifiers flag.-
84-
85 \value WaitForMoreEvents Wait for events if no pending events are-
86 available.-
87-
88 \omitvalue X11ExcludeTimers-
89 \omitvalue EventLoopExec-
90 \omitvalue DialogExec-
91-
92 \sa processEvents()-
93*/-
94-
95/*!-
96 Constructs an event loop object with the given \a parent.-
97*/-
98QEventLoop::QEventLoop(QObject *parent)-
99 : QObject(*new QEventLoopPrivate, parent)-
100{-
101 Q_D(QEventLoop);-
102 if (!QCoreApplication::instance() && QCoreApplicationPrivate::threadRequiresCoreApplication()) {
!QCoreApplication::instance()Description
TRUEevaluated 3 times by 3 tests
Evaluated by:
  • tst_QCoreApplication
  • tst_QDBusConnection_NoApplication
  • tst_QGuiApplication
FALSEevaluated 3964 times by 186 tests
Evaluated by:
  • tst_Gestures
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBuffer
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QColorDialog
  • tst_QColumnView
  • tst_QComboBox
  • tst_QCommandLinkButton
  • tst_QCoreApplication
  • tst_QDBusAbstractAdaptor
  • ...
QCoreApplicati...eApplication()Description
TRUEnever evaluated
FALSEevaluated 3 times by 3 tests
Evaluated by:
  • tst_QCoreApplication
  • tst_QDBusConnection_NoApplication
  • tst_QGuiApplication
0-3964
103 qWarning("QEventLoop: Cannot be used without QApplication");-
104 } else if (!d->threadData->eventDispatcher.load()) {
never executed: end of block
!d->threadData...patcher.load()Description
TRUEevaluated 2 times by 1 test
Evaluated by:
  • tst_QThread
FALSEevaluated 3965 times by 187 tests
Evaluated by:
  • tst_Gestures
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBuffer
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QColorDialog
  • tst_QColumnView
  • tst_QComboBox
  • tst_QCommandLinkButton
  • tst_QCoreApplication
  • tst_QDBusAbstractAdaptor
  • ...
0-3965
105 QThreadPrivate::createEventDispatcher(d->threadData);-
106 }
executed 2 times by 1 test: end of block
Executed by:
  • tst_QThread
2
107}
executed 3967 times by 187 tests: end of block
Executed by:
  • tst_Gestures
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBuffer
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QColorDialog
  • tst_QColumnView
  • tst_QComboBox
  • tst_QCommandLinkButton
  • tst_QCoreApplication
  • tst_QDBusAbstractAdaptor
  • ...
3967
108-
109/*!-
110 Destroys the event loop object.-
111*/-
112QEventLoop::~QEventLoop()-
113{ }-
114-
115-
116/*!-
117 Processes pending events that match \a flags until there are no-
118 more events to process. Returns \c true if pending events were handled;-
119 otherwise returns \c false.-
120-
121 This function is especially useful if you have a long running-
122 operation and want to show its progress without allowing user-
123 input; i.e. by using the \l ExcludeUserInputEvents flag.-
124-
125 This function is simply a wrapper for-
126 QAbstractEventDispatcher::processEvents(). See the documentation-
127 for that function for details.-
128*/-
129bool QEventLoop::processEvents(ProcessEventsFlags flags)-
130{-
131 Q_D(QEventLoop);-
132 if (!d->threadData->eventDispatcher.load())
!d->threadData...patcher.load()Description
TRUEnever evaluated
FALSEevaluated 220669 times by 339 tests
Evaluated by:
  • tst_Gestures
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBuffer
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QColorDialog
  • tst_QColumnView
  • tst_QComboBox
  • tst_QCommandLinkButton
  • tst_QCompleter
  • tst_QCoreApplication
  • ...
0-220669
133 return false;
never executed: return false;
0
134 return d->threadData->eventDispatcher.load()->processEvents(flags);
executed 220669 times by 339 tests: return d->threadData->eventDispatcher.load()->processEvents(flags);
Executed by:
  • tst_Gestures
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBuffer
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QColorDialog
  • tst_QColumnView
  • tst_QComboBox
  • tst_QCommandLinkButton
  • tst_QCompleter
  • tst_QCoreApplication
  • ...
220669
135}-
136-
137/*!-
138 Enters the main event loop and waits until exit() is called.-
139 Returns the value that was passed to exit().-
140-
141 If \a flags are specified, only events of the types allowed by-
142 the \a flags will be processed.-
143-
144 It is necessary to call this function to start event handling. The-
145 main event loop receives events from the window system and-
146 dispatches these to the application widgets.-
147-
148 Generally speaking, no user interaction can take place before-
149 calling exec(). As a special case, modal widgets like QMessageBox-
150 can be used before calling exec(), because modal widgets-
151 use their own local event loop.-
152-
153 To make your application perform idle processing (i.e. executing a-
154 special function whenever there are no pending events), use a-
155 QTimer with 0 timeout. More sophisticated idle processing schemes-
156 can be achieved using processEvents().-
157-
158 \sa QCoreApplication::quit(), exit(), processEvents()-
159*/-
160int QEventLoop::exec(ProcessEventsFlags flags)-
161{-
162 Q_D(QEventLoop);-
163 //we need to protect from race condition with QThread::exit-
164 QMutexLocker locker(&static_cast<QThreadPrivate *>(QObjectPrivate::get(d->threadData->thread))->mutex);-
165 if (d->threadData->quitNow)
d->threadData->quitNowDescription
TRUEevaluated 7 times by 3 tests
Evaluated by:
  • tst_QEventLoop
  • tst_QGuiEventLoop
  • tst_QThread
FALSEevaluated 4037 times by 187 tests
Evaluated by:
  • tst_Gestures
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBuffer
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QColorDialog
  • tst_QColumnView
  • tst_QComboBox
  • tst_QCommandLinkButton
  • tst_QCoreApplication
  • tst_QDBusAbstractAdaptor
  • ...
7-4037
166 return -1;
executed 7 times by 3 tests: return -1;
Executed by:
  • tst_QEventLoop
  • tst_QGuiEventLoop
  • tst_QThread
7
167-
168 if (d->inExec) {
d->inExecDescription
TRUEevaluated 2 times by 2 tests
Evaluated by:
  • tst_QEventLoop
  • tst_QGuiEventLoop
FALSEevaluated 4035 times by 187 tests
Evaluated by:
  • tst_Gestures
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBuffer
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QColorDialog
  • tst_QColumnView
  • tst_QComboBox
  • tst_QCommandLinkButton
  • tst_QCoreApplication
  • tst_QDBusAbstractAdaptor
  • ...
2-4035
169 qWarning("QEventLoop::exec: instance %p has already called exec()", this);-
170 return -1;
executed 2 times by 2 tests: return -1;
Executed by:
  • tst_QEventLoop
  • tst_QGuiEventLoop
2
171 }-
172-
173 struct LoopReference {-
174 QEventLoopPrivate *d;-
175 QMutexLocker &locker;-
176-
177 bool exceptionCaught;-
178 LoopReference(QEventLoopPrivate *d, QMutexLocker &locker) : d(d), locker(locker), exceptionCaught(true)-
179 {-
180 d->inExec = true;-
181 d->exit.storeRelease(false);-
182 ++d->threadData->loopLevel;-
183 d->threadData->eventLoops.push(d->q_func());-
184 locker.unlock();-
185 }
executed 4035 times by 187 tests: end of block
Executed by:
  • tst_Gestures
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBuffer
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QColorDialog
  • tst_QColumnView
  • tst_QComboBox
  • tst_QCommandLinkButton
  • tst_QCoreApplication
  • tst_QDBusAbstractAdaptor
  • ...
4035
186-
187 ~LoopReference()-
188 {-
189 if (exceptionCaught) {
exceptionCaughtDescription
TRUEnever evaluated
FALSEevaluated 4039 times by 239 tests
Evaluated by:
  • tst_QAbstractNetworkCache
  • tst_QAbstractScrollArea
  • tst_QApplication
  • tst_QBuffer
  • tst_QButtonGroup
  • tst_QColorDialog
  • tst_QCommandLinkButton
  • tst_QCoreApplication
  • tst_QDBusAbstractAdaptor
  • tst_QDBusAbstractInterface
  • tst_QDBusConnection
  • tst_QDBusConnection_Delayed
  • tst_QDBusConnection_SpyHook
  • tst_QDBusInterface
  • tst_QDBusMarshall
  • tst_QDBusPendingCall
  • tst_QDBusServiceWatcher
  • tst_QDBusThreading
  • tst_QDialog
  • tst_QDnsLookup
  • tst_QDnsLookup_Appless
  • tst_QEventLoop
  • tst_QFileDialog2
  • tst_QFileSystemWatcher
  • tst_QFiledialog
  • ...
0-4039
190 qWarning("Qt has caught an exception thrown from an event handler. Throwing\n"-
191 "exceptions from an event handler is not supported in Qt.\n"-
192 "You must not let any exception whatsoever propagate through Qt code.\n"-
193 "If that is not possible, in Qt 5 you must at least reimplement\n"-
194 "QCoreApplication::notify() and catch all exceptions there.\n");-
195 }
never executed: end of block
0
196 locker.relock();-
197 QEventLoop *eventLoop = d->threadData->eventLoops.pop();-
198 Q_ASSERT_X(eventLoop == d->q_func(), "QEventLoop::exec()", "internal error");-
199 Q_UNUSED(eventLoop); // --release warning-
200 d->inExec = false;-
201 --d->threadData->loopLevel;-
202 }
executed 4039 times by 239 tests: end of block
Executed by:
  • tst_QAbstractNetworkCache
  • tst_QAbstractScrollArea
  • tst_QApplication
  • tst_QBuffer
  • tst_QButtonGroup
  • tst_QColorDialog
  • tst_QCommandLinkButton
  • tst_QCoreApplication
  • tst_QDBusAbstractAdaptor
  • tst_QDBusAbstractInterface
  • tst_QDBusConnection
  • tst_QDBusConnection_Delayed
  • tst_QDBusConnection_SpyHook
  • tst_QDBusInterface
  • tst_QDBusMarshall
  • tst_QDBusPendingCall
  • tst_QDBusServiceWatcher
  • tst_QDBusThreading
  • tst_QDialog
  • tst_QDnsLookup
  • tst_QDnsLookup_Appless
  • tst_QEventLoop
  • tst_QFileDialog2
  • tst_QFileSystemWatcher
  • tst_QFiledialog
  • ...
4039
203 };-
204 LoopReference ref(d, locker);-
205-
206 // remove posted quit events when entering a new event loop-
207 QCoreApplication *app = QCoreApplication::instance();-
208 if (app && app->thread() == thread())
appDescription
TRUEevaluated 4032 times by 186 tests
Evaluated by:
  • tst_Gestures
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBuffer
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QColorDialog
  • tst_QColumnView
  • tst_QComboBox
  • tst_QCommandLinkButton
  • tst_QCoreApplication
  • tst_QDBusAbstractAdaptor
  • ...
FALSEevaluated 3 times by 3 tests
Evaluated by:
  • tst_QCoreApplication
  • tst_QDBusConnection_NoApplication
  • tst_QGuiApplication
app->thread() == thread()Description
TRUEevaluated 3007 times by 77 tests
Evaluated by:
  • tst_QAbstractScrollArea
  • tst_QApplication
  • tst_QBuffer
  • tst_QButtonGroup
  • tst_QColorDialog
  • tst_QCommandLinkButton
  • tst_QCoreApplication
  • tst_QDBusAbstractAdaptor
  • tst_QDBusAbstractInterface
  • tst_QDBusConnection
  • tst_QDBusConnection_Delayed
  • tst_QDBusConnection_SpyHook
  • tst_QDBusInterface
  • tst_QDBusMarshall
  • tst_QDBusPendingCall
  • tst_QDBusServiceWatcher
  • tst_QDBusThreading
  • tst_QDialog
  • tst_QDnsLookup
  • tst_QDnsLookup_Appless
  • tst_QEventLoop
  • tst_QFileDialog2
  • tst_QFileSystemWatcher
  • tst_QFiledialog
  • tst_QFontDialog
  • ...
FALSEevaluated 1025 times by 173 tests
Evaluated by:
  • tst_Gestures
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • 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_QCoreApplication
  • tst_QDBusAbstractAdaptor
  • tst_QDBusAbstractInterface
  • ...
3-4032
209 QCoreApplication::removePostedEvents(app, QEvent::Quit);
executed 3007 times by 77 tests: QCoreApplication::removePostedEvents(app, QEvent::Quit);
Executed by:
  • tst_QAbstractScrollArea
  • tst_QApplication
  • tst_QBuffer
  • tst_QButtonGroup
  • tst_QColorDialog
  • tst_QCommandLinkButton
  • tst_QCoreApplication
  • tst_QDBusAbstractAdaptor
  • tst_QDBusAbstractInterface
  • tst_QDBusConnection
  • tst_QDBusConnection_Delayed
  • tst_QDBusConnection_SpyHook
  • tst_QDBusInterface
  • tst_QDBusMarshall
  • tst_QDBusPendingCall
  • tst_QDBusServiceWatcher
  • tst_QDBusThreading
  • tst_QDialog
  • tst_QDnsLookup
  • tst_QDnsLookup_Appless
  • tst_QEventLoop
  • tst_QFileDialog2
  • tst_QFileSystemWatcher
  • tst_QFiledialog
  • tst_QFontDialog
  • ...
3007
210-
211 while (!d->exit.loadAcquire())
!d->exit.loadAcquire()Description
TRUEevaluated 220057 times by 339 tests
Evaluated by:
  • tst_Gestures
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBuffer
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QColorDialog
  • tst_QColumnView
  • tst_QComboBox
  • tst_QCommandLinkButton
  • tst_QCompleter
  • tst_QCoreApplication
  • ...
FALSEevaluated 4039 times by 239 tests
Evaluated by:
  • tst_QAbstractNetworkCache
  • tst_QAbstractScrollArea
  • tst_QApplication
  • tst_QBuffer
  • tst_QButtonGroup
  • tst_QColorDialog
  • tst_QCommandLinkButton
  • tst_QCoreApplication
  • tst_QDBusAbstractAdaptor
  • tst_QDBusAbstractInterface
  • tst_QDBusConnection
  • tst_QDBusConnection_Delayed
  • tst_QDBusConnection_SpyHook
  • tst_QDBusInterface
  • tst_QDBusMarshall
  • tst_QDBusPendingCall
  • tst_QDBusServiceWatcher
  • tst_QDBusThreading
  • tst_QDialog
  • tst_QDnsLookup
  • tst_QDnsLookup_Appless
  • tst_QEventLoop
  • tst_QFileDialog2
  • tst_QFileSystemWatcher
  • tst_QFiledialog
  • ...
4039-220057
212 processEvents(flags | WaitForMoreEvents | EventLoopExec);
executed 220057 times by 339 tests: processEvents(flags | WaitForMoreEvents | EventLoopExec);
Executed by:
  • tst_Gestures
  • tst_ModelTest
  • tst_NetworkSelfTest
  • tst_QAbstractButton
  • tst_QAbstractItemView
  • tst_QAbstractNetworkCache
  • tst_QAbstractScrollArea
  • tst_QAbstractSlider
  • tst_QAbstractSpinBox
  • tst_QAccessibility
  • tst_QAction
  • tst_QActionGroup
  • tst_QApplication
  • tst_QBackingStore
  • tst_QBoxLayout
  • tst_QBuffer
  • tst_QButtonGroup
  • tst_QCalendarWidget
  • tst_QCheckBox
  • tst_QColorDialog
  • tst_QColumnView
  • tst_QComboBox
  • tst_QCommandLinkButton
  • tst_QCompleter
  • tst_QCoreApplication
  • ...
220057
213-
214 ref.exceptionCaught = false;-
215 return d->returnCode.load();
executed 4039 times by 239 tests: return d->returnCode.load();
Executed by:
  • tst_QAbstractNetworkCache
  • tst_QAbstractScrollArea
  • tst_QApplication
  • tst_QBuffer
  • tst_QButtonGroup
  • tst_QColorDialog
  • tst_QCommandLinkButton
  • tst_QCoreApplication
  • tst_QDBusAbstractAdaptor
  • tst_QDBusAbstractInterface
  • tst_QDBusConnection
  • tst_QDBusConnection_Delayed
  • tst_QDBusConnection_SpyHook
  • tst_QDBusInterface
  • tst_QDBusMarshall
  • tst_QDBusPendingCall
  • tst_QDBusServiceWatcher
  • tst_QDBusThreading
  • tst_QDialog
  • tst_QDnsLookup
  • tst_QDnsLookup_Appless
  • tst_QEventLoop
  • tst_QFileDialog2
  • tst_QFileSystemWatcher
  • tst_QFiledialog
  • ...
4039
216}-
217-
218/*!-
219 Process pending events that match \a flags for a maximum of \a-
220 maxTime milliseconds, or until there are no more events to-
221 process, whichever is shorter.-
222 This function is especially useful if you have a long running-
223 operation and want to show its progress without allowing user-
224 input, i.e. by using the \l ExcludeUserInputEvents flag.-
225-
226 \b{Notes:}-
227 \list-
228 \li This function does not process events continuously; it-
229 returns after all available events are processed.-
230 \li Specifying the \l WaitForMoreEvents flag makes no sense-
231 and will be ignored.-
232 \endlist-
233*/-
234void QEventLoop::processEvents(ProcessEventsFlags flags, int maxTime)-
235{-
236 Q_D(QEventLoop);-
237 if (!d->threadData->eventDispatcher.load())
!d->threadData...patcher.load()Description
TRUEnever evaluated
FALSEnever evaluated
0
238 return;
never executed: return;
0
239-
240 QElapsedTimer start;-
241 start.start();-
242 while (processEvents(flags & ~WaitForMoreEvents)) {
processEvents(...ForMoreEvents)Description
TRUEnever evaluated
FALSEnever evaluated
0
243 if (start.elapsed() > maxTime)
start.elapsed() > maxTimeDescription
TRUEnever evaluated
FALSEnever evaluated
0
244 break;
never executed: break;
0
245 }
never executed: end of block
0
246}
never executed: end of block
0
247-
248/*!-
249 Tells the event loop to exit with a return code.-
250-
251 After this function has been called, the event loop returns from-
252 the call to exec(). The exec() function returns \a returnCode.-
253-
254 By convention, a \a returnCode of 0 means success, and any non-zero-
255 value indicates an error.-
256-
257 Note that unlike the C library function of the same name, this-
258 function \e does return to the caller -- it is event processing that-
259 stops.-
260-
261 \sa QCoreApplication::quit(), quit(), exec()-
262*/-
263void QEventLoop::exit(int returnCode)-
264{-
265 Q_D(QEventLoop);-
266 if (!d->threadData->eventDispatcher.load())
!d->threadData...patcher.load()Description
TRUEnever evaluated
FALSEevaluated 4387 times by 239 tests
Evaluated by:
  • tst_QAbstractNetworkCache
  • tst_QAbstractScrollArea
  • tst_QApplication
  • tst_QBuffer
  • tst_QButtonGroup
  • tst_QColorDialog
  • tst_QCommandLinkButton
  • tst_QCoreApplication
  • tst_QDBusAbstractAdaptor
  • tst_QDBusAbstractInterface
  • tst_QDBusConnection
  • tst_QDBusConnection_Delayed
  • tst_QDBusConnection_SpyHook
  • tst_QDBusInterface
  • tst_QDBusMarshall
  • tst_QDBusPendingCall
  • tst_QDBusServiceWatcher
  • tst_QDBusThreading
  • tst_QDialog
  • tst_QDnsLookup
  • tst_QDnsLookup_Appless
  • tst_QEventLoop
  • tst_QFileDialog2
  • tst_QFileSystemWatcher
  • tst_QFiledialog
  • ...
0-4387
267 return;
never executed: return;
0
268-
269 d->returnCode.store(returnCode);-
270 d->exit.storeRelease(true);-
271 d->threadData->eventDispatcher.load()->interrupt();-
272}
executed 4387 times by 239 tests: end of block
Executed by:
  • tst_QAbstractNetworkCache
  • tst_QAbstractScrollArea
  • tst_QApplication
  • tst_QBuffer
  • tst_QButtonGroup
  • tst_QColorDialog
  • tst_QCommandLinkButton
  • tst_QCoreApplication
  • tst_QDBusAbstractAdaptor
  • tst_QDBusAbstractInterface
  • tst_QDBusConnection
  • tst_QDBusConnection_Delayed
  • tst_QDBusConnection_SpyHook
  • tst_QDBusInterface
  • tst_QDBusMarshall
  • tst_QDBusPendingCall
  • tst_QDBusServiceWatcher
  • tst_QDBusThreading
  • tst_QDialog
  • tst_QDnsLookup
  • tst_QDnsLookup_Appless
  • tst_QEventLoop
  • tst_QFileDialog2
  • tst_QFileSystemWatcher
  • tst_QFiledialog
  • ...
4387
273-
274/*!-
275 Returns \c true if the event loop is running; otherwise returns-
276 false. The event loop is considered running from the time when-
277 exec() is called until exit() is called.-
278-
279 \sa exec(), exit()-
280 */-
281bool QEventLoop::isRunning() const-
282{-
283 Q_D(const QEventLoop);-
284 return !d->exit.loadAcquire();
executed 8 times by 1 test: return !d->exit.loadAcquire();
Executed by:
  • tst_QGraphicsView
8
285}-
286-
287/*!-
288 Wakes up the event loop.-
289-
290 \sa QAbstractEventDispatcher::wakeUp()-
291*/-
292void QEventLoop::wakeUp()-
293{-
294 Q_D(QEventLoop);-
295 if (!d->threadData->eventDispatcher.load())
!d->threadData...patcher.load()Description
TRUEnever evaluated
FALSEevaluated 2 times by 2 tests
Evaluated by:
  • tst_QEventLoop
  • tst_QGuiEventLoop
0-2
296 return;
never executed: return;
0
297 d->threadData->eventDispatcher.load()->wakeUp();-
298}
executed 2 times by 2 tests: end of block
Executed by:
  • tst_QEventLoop
  • tst_QGuiEventLoop
2
299-
300-
301/*!-
302 \reimp-
303*/-
304bool QEventLoop::event(QEvent *event)-
305{-
306 if (event->type() == QEvent::Quit) {
event->type() == QEvent::QuitDescription
TRUEevaluated 4 times by 2 tests
Evaluated by:
  • tst_QEventLoop
  • tst_QGuiEventLoop
FALSEevaluated 342 times by 14 tests
Evaluated by:
  • tst_QApplication
  • tst_QCoreApplication
  • tst_QDBusAbstractAdaptor
  • tst_QDBusAbstractInterface
  • tst_QDBusConnection
  • tst_QDBusConnection_SpyHook
  • tst_QEventLoop
  • tst_QGuiApplication
  • tst_QGuiEventLoop
  • tst_QNetworkReply
  • tst_QObject
  • tst_QProcess
  • tst_QThread
  • tst_QTimer
4-342
307 quit();-
308 return true;
executed 4 times by 2 tests: return true;
Executed by:
  • tst_QEventLoop
  • tst_QGuiEventLoop
4
309 } else {-
310 return QObject::event(event);
executed 342 times by 14 tests: return QObject::event(event);
Executed by:
  • tst_QApplication
  • tst_QCoreApplication
  • tst_QDBusAbstractAdaptor
  • tst_QDBusAbstractInterface
  • tst_QDBusConnection
  • tst_QDBusConnection_SpyHook
  • tst_QEventLoop
  • tst_QGuiApplication
  • tst_QGuiEventLoop
  • tst_QNetworkReply
  • tst_QObject
  • tst_QProcess
  • tst_QThread
  • tst_QTimer
342
311 }-
312}-
313-
314/*!-
315 Tells the event loop to exit normally.-
316-
317 Same as exit(0).-
318-
319 \sa QCoreApplication::quit(), exit()-
320*/-
321void QEventLoop::quit()-
322{
executed 646 times by 27 tests: exit(0);
Executed by:
  • tst_QApplication
  • tst_QCoreApplication
  • tst_QDBusAbstractAdaptor
  • tst_QDBusAbstractInterface
  • tst_QDBusConnection
  • tst_QDBusConnection_SpyHook
  • tst_QDBusMarshall
  • tst_QEventLoop
  • tst_QFileSystemWatcher
  • tst_QFtp
  • tst_QGraphicsView
  • tst_QGuiApplication
  • tst_QGuiEventLoop
  • tst_QImageReader
  • tst_QNetworkReply
  • tst_QObject
  • tst_QProcess
  • tst_QProgressBar
  • tst_QSslSocket
  • tst_QTcpServer
  • tst_QTcpSocket
  • tst_QThread
  • tst_QTimeLine
  • tst_QTimer
  • tst_QWidget
  • ...
 exit(0); }
executed 646 times by 27 tests: exit(0);
Executed by:
  • tst_QApplication
  • tst_QCoreApplication
  • tst_QDBusAbstractAdaptor
  • tst_QDBusAbstractInterface
  • tst_QDBusConnection
  • tst_QDBusConnection_SpyHook
  • tst_QDBusMarshall
  • tst_QEventLoop
  • tst_QFileSystemWatcher
  • tst_QFtp
  • tst_QGraphicsView
  • tst_QGuiApplication
  • tst_QGuiEventLoop
  • tst_QImageReader
  • tst_QNetworkReply
  • tst_QObject
  • tst_QProcess
  • tst_QProgressBar
  • tst_QSslSocket
  • tst_QTcpServer
  • tst_QTcpSocket
  • tst_QThread
  • tst_QTimeLine
  • tst_QTimer
  • tst_QWidget
  • ...
646
323-
324-
325class QEventLoopLockerPrivate-
326{-
327public:-
328 explicit QEventLoopLockerPrivate(QEventLoopPrivate *loop)-
329 : loop(loop), type(EventLoop)-
330 {-
331 loop->ref();-
332 }
executed 22 times by 2 tests: end of block
Executed by:
  • tst_QEventLoop
  • tst_QGuiEventLoop
22
333-
334 explicit QEventLoopLockerPrivate(QThreadPrivate *thread)-
335 : thread(thread), type(Thread)-
336 {-
337 thread->ref();-
338 }
executed 2 times by 1 test: end of block
Executed by:
  • tst_QThread
2
339-
340 explicit QEventLoopLockerPrivate(QCoreApplicationPrivate *app)-
341 : app(app), type(Application)-
342 {-
343 app->ref();-
344 }
executed 12 times by 2 tests: end of block
Executed by:
  • tst_QCoreApplication
  • tst_QGuiApplication
12
345-
346 ~QEventLoopLockerPrivate()-
347 {-
348 switch (type)-
349 {-
350 case EventLoop:
executed 22 times by 2 tests: case EventLoop:
Executed by:
  • tst_QEventLoop
  • tst_QGuiEventLoop
22
351 loop->deref();-
352 break;
executed 22 times by 2 tests: break;
Executed by:
  • tst_QEventLoop
  • tst_QGuiEventLoop
22
353 case Thread:
executed 1 time by 1 test: case Thread:
Executed by:
  • tst_QThread
1
354 thread->deref();-
355 break;
executed 1 time by 1 test: break;
Executed by:
  • tst_QThread
1
356 default:
executed 12 times by 2 tests: default:
Executed by:
  • tst_QCoreApplication
  • tst_QGuiApplication
12
357 app->deref();-
358 break;
executed 12 times by 2 tests: break;
Executed by:
  • tst_QCoreApplication
  • tst_QGuiApplication
12
359 }-
360 }-
361-
362private:-
363 union {-
364 QEventLoopPrivate * loop;-
365 QThreadPrivate * thread;-
366 QCoreApplicationPrivate * app;-
367 };-
368 enum Type {-
369 EventLoop,-
370 Thread,-
371 Application-
372 };-
373 const Type type;-
374};-
375-
376/*!-
377 \class QEventLoopLocker-
378 \inmodule QtCore-
379 \brief The QEventLoopLocker class provides a means to quit an event loop when it is no longer needed.-
380 \since 5.0-
381-
382 The QEventLoopLocker operates on particular objects - either a QCoreApplication-
383 instance, a QEventLoop instance or a QThread instance.-
384-
385 This makes it possible to, for example, run a batch of jobs with an event loop-
386 and exit that event loop after the last job is finished. That is accomplished-
387 by keeping a QEventLoopLocker with each job instance.-
388-
389 The variant which operates on QCoreApplication makes it possible to finish-
390 asynchronously running jobs after the last gui window has been closed. This-
391 can be useful for example for running a job which uploads data to a network.-
392-
393 \sa QEventLoop, QCoreApplication-
394*/-
395-
396/*!-
397 Creates an event locker operating on the QCoreApplication.-
398-
399 The application will quit when there are no more QEventLoopLockers operating on it.-
400-
401 \sa QCoreApplication::quit(), QCoreApplication::isQuitLockEnabled()-
402 */-
403QEventLoopLocker::QEventLoopLocker()-
404 : d_ptr(new QEventLoopLockerPrivate(static_cast<QCoreApplicationPrivate*>(QObjectPrivate::get(QCoreApplication::instance()))))-
405{-
406-
407}
executed 12 times by 2 tests: end of block
Executed by:
  • tst_QCoreApplication
  • tst_QGuiApplication
12
408-
409/*!-
410 Creates an event locker operating on the \a loop.-
411-
412 This particular QEventLoop will quit when there are no more QEventLoopLockers operating on it.-
413-
414 \sa QEventLoop::quit()-
415 */-
416QEventLoopLocker::QEventLoopLocker(QEventLoop *loop)-
417 : d_ptr(new QEventLoopLockerPrivate(static_cast<QEventLoopPrivate*>(QObjectPrivate::get(loop))))-
418{-
419-
420}
executed 22 times by 2 tests: end of block
Executed by:
  • tst_QEventLoop
  • tst_QGuiEventLoop
22
421-
422/*!-
423 Creates an event locker operating on the \a thread.-
424-
425 This particular QThread will quit when there are no more QEventLoopLockers operating on it.-
426-
427 \sa QThread::quit()-
428 */-
429QEventLoopLocker::QEventLoopLocker(QThread *thread)-
430 : d_ptr(new QEventLoopLockerPrivate(static_cast<QThreadPrivate*>(QObjectPrivate::get(thread))))-
431{-
432-
433}
executed 2 times by 1 test: end of block
Executed by:
  • tst_QThread
2
434-
435/*!-
436 Destroys this event loop locker object-
437 */-
438QEventLoopLocker::~QEventLoopLocker()-
439{-
440 delete d_ptr;-
441}
executed 35 times by 5 tests: end of block
Executed by:
  • tst_QCoreApplication
  • tst_QEventLoop
  • tst_QGuiApplication
  • tst_QGuiEventLoop
  • tst_QThread
35
442-
443QT_END_NAMESPACE-
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