diff options
Diffstat (limited to 'src/corelib/kernel/qcoreapplication.cpp')
-rw-r--r-- | src/corelib/kernel/qcoreapplication.cpp | 155 |
1 files changed, 119 insertions, 36 deletions
diff --git a/src/corelib/kernel/qcoreapplication.cpp b/src/corelib/kernel/qcoreapplication.cpp index c8b130bbb9..a8cabd52e1 100644 --- a/src/corelib/kernel/qcoreapplication.cpp +++ b/src/corelib/kernel/qcoreapplication.cpp @@ -116,6 +116,12 @@ # include <taskLib.h> #endif +#ifdef QT_BOOTSTRAPPED +#include <private/qtrace_p.h> +#else +#include <qtcore_tracepoints_p.h> +#endif + #include <algorithm> QT_BEGIN_NAMESPACE @@ -263,7 +269,7 @@ Q_GLOBAL_STATIC(QStartUpFuncList, preRList) typedef QList<QtCleanUpFunction> QVFuncList; Q_GLOBAL_STATIC(QVFuncList, postRList) #ifndef QT_NO_QOBJECT -static QBasicMutex globalPreRoutinesMutex; +static QBasicMutex globalRoutinesMutex; #endif /*! @@ -277,13 +283,15 @@ void qAddPreRoutine(QtStartUpFunction p) QStartUpFuncList *list = preRList(); if (!list) return; + + if (QCoreApplication::instance()) + p(); + // Due to C++11 parallel dynamic initialization, this can be called // from multiple threads. #ifndef QT_NO_THREAD - QMutexLocker locker(&globalPreRoutinesMutex); + QMutexLocker locker(&globalRoutinesMutex); #endif - if (QCoreApplication::instance()) - p(); list->prepend(p); // in case QCoreApplication is re-created, see qt_call_pre_routines } @@ -292,6 +300,9 @@ void qAddPostRoutine(QtCleanUpFunction p) QVFuncList *list = postRList(); if (!list) return; +#ifndef QT_NO_THREAD + QMutexLocker locker(&globalRoutinesMutex); +#endif list->prepend(p); } @@ -300,6 +311,9 @@ void qRemovePostRoutine(QtCleanUpFunction p) QVFuncList *list = postRList(); if (!list) return; +#ifndef QT_NO_THREAD + QMutexLocker locker(&globalRoutinesMutex); +#endif list->removeAll(p); } @@ -308,15 +322,18 @@ static void qt_call_pre_routines() if (!preRList.exists()) return; + QVFuncList list; + { #ifndef QT_NO_THREAD - QMutexLocker locker(&globalPreRoutinesMutex); + QMutexLocker locker(&globalRoutinesMutex); #endif - QVFuncList *list = &(*preRList); - // Unlike qt_call_post_routines, we don't empty the list, because - // Q_COREAPP_STARTUP_FUNCTION is a macro, so the user expects - // the function to be executed every time QCoreApplication is created. - for (int i = 0; i < list->count(); ++i) - list->at(i)(); + // Unlike qt_call_post_routines, we don't empty the list, because + // Q_COREAPP_STARTUP_FUNCTION is a macro, so the user expects + // the function to be executed every time QCoreApplication is created. + list = *preRList; + } + for (int i = 0; i < list.count(); ++i) + list.at(i)(); } void Q_CORE_EXPORT qt_call_post_routines() @@ -324,9 +341,21 @@ void Q_CORE_EXPORT qt_call_post_routines() if (!postRList.exists()) return; - QVFuncList *list = &(*postRList); - while (!list->isEmpty()) - (list->takeFirst())(); + forever { + QVFuncList list; + { + // extract the current list and make the stored list empty +#ifndef QT_NO_THREAD + QMutexLocker locker(&globalRoutinesMutex); +#endif + qSwap(*postRList, list); + } + + if (list.isEmpty()) + break; + for (QtCleanUpFunction f : qAsConst(list)) + f(); + } } @@ -426,7 +455,7 @@ QCoreApplicationPrivate::QCoreApplicationPrivate(int &aargc, char **aargv, uint , argv(aargv) #if defined(Q_OS_WIN) && !defined(Q_OS_WINRT) , origArgc(0) - , origArgv(Q_NULLPTR) + , origArgv(nullptr) #endif , application_type(QCoreApplicationPrivate::Tty) #ifndef QT_NO_QOBJECT @@ -437,6 +466,9 @@ QCoreApplicationPrivate::QCoreApplicationPrivate(int &aargc, char **aargv, uint , q_ptr(0) #endif { +#if defined(Q_OS_DARWIN) + qt_apple_check_os_version(); +#endif app_compile_version = flags & 0xffffff; static const char *const empty = ""; if (argc == 0 || argv == 0) { @@ -755,9 +787,17 @@ QCoreApplication::QCoreApplication(int &argc, char **argv #endif } +/*! + \enum QCoreApplication::anonymous + \internal + + \value ApplicationFlags QT_VERSION +*/ void QCoreApplicationPrivate::init() { + Q_TRACE(qcoreapplicationprivate_init_entry); + #if defined(Q_OS_MACOS) QMacAutoReleasePool pool; #endif @@ -849,6 +889,8 @@ void QCoreApplicationPrivate::init() #ifndef QT_NO_QOBJECT is_app_running = true; // No longer starting up. #endif + + Q_TRACE(qcoreapplicationprivate_init_exit); } /*! @@ -1025,6 +1067,21 @@ bool QCoreApplication::notifyInternal2(QObject *receiver, QEvent *event) } /*! + \internal + \since 5.10 + + Forwards the \a event to the \a receiver, using the spontaneous + state of the \a originatingEvent if specified. +*/ +bool QCoreApplication::forwardEvent(QObject *receiver, QEvent *event, QEvent *originatingEvent) +{ + if (event && originatingEvent) + event->spont = originatingEvent->spont; + + return notifyInternal2(receiver, event); +} + +/*! Sends \a event to \a receiver: \a {receiver}->event(\a event). Returns the value that is returned from the receiver's event handler. Note that this function is called for all events sent to @@ -1331,6 +1388,13 @@ void QCoreApplicationPrivate::execCleanup() By convention, a \a returnCode of 0 means success, and any non-zero value indicates an error. + It's good practice to always connect signals to this slot using a + \l{Qt::}{QueuedConnection}. If a signal connected (non-queued) to this slot + is emitted before control enters the main event loop (such as before + "int main" calls \l{QCoreApplication::}{exec()}), the slot has no effect + and the application never exits. Using a queued connection ensures that the + slot will not be invoked until after control enters the main event loop. + Note that unlike the C library function of the same name, this function \e does return to the caller -- it is event processing that stops. @@ -1874,6 +1938,13 @@ void QCoreApplicationPrivate::maybeQuit() to quit(), and you also often connect e.g. QAbstractButton::clicked() or signals in QAction, QMenu, or QMenuBar to it. + It's good practice to always connect signals to this slot using a + \l{Qt::}{QueuedConnection}. If a signal connected (non-queued) to this slot + is emitted before control enters the main event loop (such as before + "int main" calls \l{QCoreApplication::}{exec()}), the slot has no effect + and the application never exits. Using a queued connection ensures that the + slot will not be invoked until after control enters the main event loop. + Example: \snippet code/src_corelib_kernel_qcoreapplication.cpp 1 @@ -1937,7 +2008,10 @@ bool QCoreApplication::installTranslator(QTranslator *translationFile) if (!QCoreApplicationPrivate::checkInstance("installTranslator")) return false; QCoreApplicationPrivate *d = self->d_func(); - d->translators.prepend(translationFile); + { + QWriteLocker locker(&d->translateMutex); + d->translators.prepend(translationFile); + } #ifndef QT_NO_TRANSLATION_BUILDER if (translationFile->isEmpty()) @@ -1969,8 +2043,10 @@ bool QCoreApplication::removeTranslator(QTranslator *translationFile) if (!QCoreApplicationPrivate::checkInstance("removeTranslator")) return false; QCoreApplicationPrivate *d = self->d_func(); + QWriteLocker locker(&d->translateMutex); if (d->translators.removeAll(translationFile)) { #ifndef QT_NO_QOBJECT + locker.unlock(); if (!self->closingDown()) { QEvent ev(QEvent::LanguageChange); QCoreApplication::sendEvent(self, &ev); @@ -2006,7 +2082,7 @@ static void replacePercentN(QString *result, int n) } /*! - \reentrant + \threadsafe Returns the translation text for \a sourceText, by querying the installed translation files. The translation files are searched @@ -2035,13 +2111,7 @@ static void replacePercentN(QString *result, int n) This function is not virtual. You can use alternative translation techniques by subclassing \l QTranslator. - \warning This method is reentrant only if all translators are - installed \e before calling this method. Installing or removing - translators while performing translations is not supported. Doing - so will most likely result in crashes or other undesirable - behavior. - - \sa QObject::tr(), installTranslator() + \sa QObject::tr(), installTranslator(), removeTranslator(), translate() */ QString QCoreApplication::translate(const char *context, const char *sourceText, const char *disambiguation, int n) @@ -2051,14 +2121,18 @@ QString QCoreApplication::translate(const char *context, const char *sourceText, if (!sourceText) return result; - if (self && !self->d_func()->translators.isEmpty()) { - QList<QTranslator*>::ConstIterator it; - QTranslator *translationFile; - for (it = self->d_func()->translators.constBegin(); it != self->d_func()->translators.constEnd(); ++it) { - translationFile = *it; - result = translationFile->translate(context, sourceText, disambiguation, n); - if (!result.isNull()) - break; + if (self) { + QCoreApplicationPrivate *d = self->d_func(); + QReadLocker locker(&d->translateMutex); + if (!d->translators.isEmpty()) { + QList<QTranslator*>::ConstIterator it; + QTranslator *translationFile; + for (it = d->translators.constBegin(); it != d->translators.constEnd(); ++it) { + translationFile = *it; + result = translationFile->translate(context, sourceText, disambiguation, n); + if (!result.isNull()) + break; + } } } @@ -2082,8 +2156,11 @@ QString qtTrId(const char *id, int n) bool QCoreApplicationPrivate::isTranslatorInstalled(QTranslator *translator) { - return QCoreApplication::self - && QCoreApplication::self->d_func()->translators.contains(translator); + if (!QCoreApplication::self) + return false; + QCoreApplicationPrivate *d = QCoreApplication::self->d_func(); + QReadLocker locker(&d->translateMutex); + return d->translators.contains(translator); } #else @@ -2865,6 +2942,7 @@ void QCoreApplication::setEventDispatcher(QAbstractEventDispatcher *eventDispatc /*! \fn void qAddPostRoutine(QtCleanUpFunction ptr) + \threadsafe \relates QCoreApplication Adds a global routine that will be called from the QCoreApplication @@ -2878,10 +2956,10 @@ void QCoreApplication::setEventDispatcher(QAbstractEventDispatcher *eventDispatc \snippet code/src_corelib_kernel_qcoreapplication.cpp 4 - Note that for an application- or module-wide cleanup, qaddPostRoutine() + Note that for an application- or module-wide cleanup, qAddPostRoutine() is often not suitable. For example, if the program is split into dynamically loaded modules, the relevant module may be unloaded long before the - QCoreApplication destructor is called. In such cases, if using qaddPostRoutine() + QCoreApplication destructor is called. In such cases, if using qAddPostRoutine() is still desirable, qRemovePostRoutine() can be used to prevent a routine from being called by the QCoreApplication destructor. For example, if that routine was called before the module was unloaded. @@ -2897,11 +2975,14 @@ void QCoreApplication::setEventDispatcher(QAbstractEventDispatcher *eventDispatc By selecting the right parent object, this can often be made to clean up the module's data at the right moment. + \note This function has been thread-safe since Qt 5.10. + \sa qRemovePostRoutine() */ /*! \fn void qRemovePostRoutine(QtCleanUpFunction ptr) + \threadsafe \relates QCoreApplication \since 5.3 @@ -2910,6 +2991,8 @@ void QCoreApplication::setEventDispatcher(QAbstractEventDispatcher *eventDispatc must have been previously added to the list by a call to qAddPostRoutine(), otherwise this function has no effect. + \note This function has been thread-safe since Qt 5.10. + \sa qAddPostRoutine() */ |