/****************************************************************************

**

** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the QtCore module of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:LGPL$

** GNU Lesser General Public License Usage

** This file may be used under the terms of the GNU Lesser General Public

** License version 2.1 as published by the Free Software Foundation and

** appearing in the file LICENSE.LGPL included in the packaging of this

** file. Please review the following information to ensure the GNU Lesser

** General Public License version 2.1 requirements will be met:

** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights. These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** GNU General Public License Usage

** Alternatively, this file may be used under the terms of the GNU General

** Public License version 3.0 as published by the Free Software Foundation

** and appearing in the file LICENSE.GPL included in the packaging of this

** file. Please review the following information to ensure the GNU General

** Public License version 3.0 requirements will be met:

** http://www.gnu.org/copyleft/gpl.html.

**

** Other Usage

** Alternatively, this file may be used in accordance with the terms and

** conditions contained in a signed written agreement between you and Nokia.

**

**

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#include "qcoreapplication.h"

#include "qcoreapplication_p.h"

#include "qabstracteventdispatcher.h"

#include "qcoreevent.h"

#include "qeventloop.h"

#include "qcorecmdlineargs_p.h"

#include <qdatastream.h>

#include <qdebug.h>

#include <qdir.h>

#include <qfile.h>

#include <qfileinfo.h>

#include <qhash.h>

#include <private/qprocess_p.h>

#include <qtextcodec.h>

#include <qthread.h>

#include <qthreadpool.h>

#include <qthreadstorage.h>

#include <private/qthread_p.h>

#include <qelapsedtimer.h>

#include <qlibraryinfo.h>

#include <qvarlengtharray.h>

#include <private/qfactoryloader_p.h>

#include <private/qfunctions_p.h>

#include <private/qlocale_p.h>

#ifdef Q_OS_SYMBIAN

#  include <exception>

#  include <f32file.h>

#  include <e32ldr.h>

#  include "qeventdispatcher_symbian_p.h"

#  include "private/qcore_symbian_p.h"

#  include "private/qfilesystemengine_p.h"

#  include <apacmdln.h>

#elif defined(Q_OS_UNIX)

#  if !defined(QT_NO_GLIB)

#    include "qeventdispatcher_glib_p.h"

#  endif

#  include "qeventdispatcher_unix_p.h"

#endif

#ifdef Q_OS_WIN

#  include "qeventdispatcher_win_p.h"

#endif

#ifdef Q_OS_MAC

#  include "qcore_mac_p.h"

#endif

#include <stdlib.h>

#ifdef Q_OS_UNIX

#  include <locale.h>

#endif

#ifdef Q_OS_VXWORKS

#  include <taskLib.h>

#endif

#ifdef Q_OS_QNX

#  include <sys/neutrino.h>

#  include <pthread.h>

#  include <sched.h>

#endif

QT_BEGIN_NAMESPACE

class QMutexUnlocker

{

public:

    inline explicit QMutexUnlocker(QMutex *m)

        : mtx(m)

    { }

    inline ~QMutexUnlocker() { unlock(); }

    inline void unlock() { if (mtx) mtx->unlock(); mtx = 0; }

private:

    Q_DISABLE_COPY(QMutexUnlocker)

    QMutex *mtx;

};

#ifdef Q_OS_SYMBIAN

static CApaCommandLine* apaCommandLine = 0;

static char *apaTail = 0;

static QVector<char *> *apaArgv = 0;

static void qt_cleanup_apa_cmd_line()

{

    delete apaCommandLine;

    apaCommandLine = 0;

    delete apaArgv;

    apaArgv = 0;

    delete apaTail;

    apaTail = 0;

}

static inline void qt_init_symbian_apa_arguments(int &argc, char **&argv)

{

    // If app is launched via CApaCommandLine::StartApp(), normal arguments only contain

    // application name.

    if (argc == 1) {

        CApaCommandLine* commandLine = QCoreApplicationPrivate::symbianCommandLine();

        if(commandLine) {

            TPtrC8 apaCmdLine = commandLine->TailEnd();

            int tailLen = apaCmdLine.Length();

            if (tailLen) {

                apaTail = reinterpret_cast<char *>(qMalloc(tailLen + 1));

                qMemCopy(apaTail, reinterpret_cast<const char *>(apaCmdLine.Ptr()), tailLen);

                apaTail[tailLen] = '\0';

                apaArgv = new QVector<char *>(8);

                // Reuse windows command line parsing

                *apaArgv = qWinCmdLine<char>(apaTail, tailLen, argc);

                apaArgv->insert(0, argv[0]);

                argc++;

                argv = apaArgv->data();

            }

        }

    }

}

CApaCommandLine* QCoreApplicationPrivate::symbianCommandLine()

{

    // Getting of Apa command line needs to be static as it can only be called successfully

	// once per process.

    if (!apaCommandLine) {

        TInt err = CApaCommandLine::GetCommandLineFromProcessEnvironment(apaCommandLine);

        if (err == KErrNone) {

            qAddPostRoutine(qt_cleanup_apa_cmd_line);

        }

    }

    return apaCommandLine;

}

#endif

#if defined(Q_WS_WIN) || defined(Q_WS_MAC)

extern QString qAppFileName();

#endif

int QCoreApplicationPrivate::app_compile_version = 0x040000; //we don't know exactly, but it's at least 4.0.0

#if defined(QT3_SUPPORT)

bool QCoreApplicationPrivate::useQt3Support = true;

#endif

#if !defined(Q_OS_WIN)

#ifdef Q_OS_MAC

QString QCoreApplicationPrivate::macMenuBarName()

{

    QString bundleName;

    CFTypeRef string = CFBundleGetValueForInfoDictionaryKey(CFBundleGetMainBundle(), CFSTR("CFBundleName"));

    if (string)

        bundleName = QCFString::toQString(static_cast<CFStringRef>(string));

    return bundleName;

}

#endif

QString QCoreApplicationPrivate::appName() const

{

    static QString applName;

#ifdef Q_OS_MAC

    applName = macMenuBarName();

#endif

    if (applName.isEmpty() && argv[0]) {

        char *p = strrchr(argv[0], '/');

        applName = QString::fromLocal8Bit(p ? p + 1 : argv[0]);

    }

    return applName;

}

#endif

bool QCoreApplicationPrivate::checkInstance(const char *function)

{

    bool b = (QCoreApplication::self != 0);

    if (!b)

        qWarning("QApplication::%s: Please instantiate the QApplication object first", function);

    return b;

}

// Support for introspection

QSignalSpyCallbackSet Q_CORE_EXPORT qt_signal_spy_callback_set = { 0, 0, 0, 0 };

void qt_register_signal_spy_callbacks(const QSignalSpyCallbackSet &callback_set)

{

    qt_signal_spy_callback_set = callback_set;

}

extern "C" void Q_CORE_EXPORT qt_startup_hook()

{

}

typedef QList<QtCleanUpFunction> QVFuncList;

Q_GLOBAL_STATIC(QVFuncList, postRList)

void qAddPostRoutine(QtCleanUpFunction p)

{

    QVFuncList *list = postRList();

    if (!list)

        return;

    list->prepend(p);

}

void qRemovePostRoutine(QtCleanUpFunction p)

{

    QVFuncList *list = postRList();

    if (!list)

        return;

    list->removeAll(p);

}

void Q_CORE_EXPORT qt_call_post_routines()

{

    QVFuncList *list = 0;

    QT_TRY {

        list = postRList();

    } QT_CATCH(const std::bad_alloc &) {

        // ignore - if we can't allocate a post routine list,

        // there's a high probability that there's no post

        // routine to be executed :)

    }

    if (!list)

        return;

    while (!list->isEmpty())

        (list->takeFirst())();

}

// app starting up if false

bool QCoreApplicationPrivate::is_app_running = false;

 // app closing down if true

bool QCoreApplicationPrivate::is_app_closing = false;

// initialized in qcoreapplication and in qtextstream autotest when setlocale is called.

Q_CORE_EXPORT bool qt_locale_initialized = false;

#ifdef Q_OS_SYMBIAN

// The global QSettings needs to be cleaned where cleanup stack is available, which is not

// normally the case when global static destructors are run.

// Declare a custom QGlobalStaticDeleter for QSettings to handle that case.

template<>

class QGlobalStaticDeleter<QSettings>

{

public:

    QGlobalStatic<QSettings> &globalStatic;

    QGlobalStaticDeleter(QGlobalStatic<QSettings> &_globalStatic)

        : globalStatic(_globalStatic)

    { }

    inline ~QGlobalStaticDeleter()

    {

        CTrapCleanup *cleanup = CTrapCleanup::New();

        delete globalStatic.pointer;

        delete cleanup;

        globalStatic.pointer = 0;

        globalStatic.destroyed = true;

    }

};

#endif

/*

  Create an instance of Trolltech.conf. This ensures that the settings will not

  be thrown out of QSetting's cache for unused settings.

  */

Q_GLOBAL_STATIC_WITH_ARGS(QSettings, staticTrolltechConf, (QSettings::UserScope, QLatin1String("Trolltech")))

QSettings *QCoreApplicationPrivate::trolltechConf()

{

    return staticTrolltechConf();

}

Q_CORE_EXPORT uint qGlobalPostedEventsCount()

{

    QThreadData *currentThreadData = QThreadData::current();

    return currentThreadData->postEventList.size() - currentThreadData->postEventList.startOffset;

}

void qt_set_current_thread_to_main_thread()

{

    QCoreApplicationPrivate::theMainThread = QThread::currentThread();

}

QCoreApplication *QCoreApplication::self = 0;

QAbstractEventDispatcher *QCoreApplicationPrivate::eventDispatcher = 0;

uint QCoreApplicationPrivate::attribs;

#ifdef Q_OS_UNIX

Qt::HANDLE qt_application_thread_id = 0;

#endif

struct QCoreApplicationData {

    QCoreApplicationData() {

#ifndef QT_NO_LIBRARY

        app_libpaths = 0;

#endif

    }

    ~QCoreApplicationData() {

#ifndef QT_NO_LIBRARY

        delete app_libpaths;

#endif

        // cleanup the QAdoptedThread created for the main() thread

       if (QCoreApplicationPrivate::theMainThread) {

           QThreadData *data = QThreadData::get2(QCoreApplicationPrivate::theMainThread);

           QCoreApplicationPrivate::theMainThread = 0;

           data->deref(); // deletes the data and the adopted thread

       }

    }

    QString orgName, orgDomain, application;

    QString applicationVersion;

#ifndef QT_NO_LIBRARY

    QStringList *app_libpaths;

#endif

};

Q_GLOBAL_STATIC(QCoreApplicationData, coreappdata)

QCoreApplicationPrivate::QCoreApplicationPrivate(int &aargc, char **aargv, uint flags)

    : QObjectPrivate(), argc(aargc), argv(aargv), application_type(0), eventFilter(0),

      in_exec(false), aboutToQuitEmitted(false)

{

    app_compile_version = flags & 0xffffff;

#if defined(QT3_SUPPORT)

    useQt3Support = !(flags & 0x01000000);

#endif

    static const char *const empty = "";

    if (argc == 0 || argv == 0) {

        argc = 0;

        argv = (char **)∅ // ouch! careful with QCoreApplication::argv()!

    }

    QCoreApplicationPrivate::is_app_closing = false;

#ifdef Q_OS_SYMBIAN

    qt_init_symbian_apa_arguments(argc, argv);

#endif

#ifdef Q_OS_UNIX

    qt_application_thread_id = QThread::currentThreadId();

#endif

#ifdef Q_OS_QNX

    // make the kernel attempt to emulate an instruction with a misaligned access

    // if the attempt fails, it faults with a SIGBUS

    int tv = -1;

    ThreadCtl(_NTO_TCTL_ALIGN_FAULT, &tv);

    // without Round Robin drawn intensive apps will hog the cpu

    // and make the system appear frozen

    int sched_policy;

    sched_param param;

    if (pthread_getschedparam(0, &sched_policy, &param) == 0 && sched_policy != SCHED_RR) {

        sched_policy = SCHED_RR;

        pthread_setschedparam(0, sched_policy, &param);

    }

#endif

    // note: this call to QThread::currentThread() may end up setting theMainThread!

    if (QThread::currentThread() != theMainThread)

        qWarning("WARNING: QApplication was not created in the main() thread.");

}

QCoreApplicationPrivate::~QCoreApplicationPrivate()

{

    if (threadData) {

#ifndef QT_NO_THREAD

        void *data = &threadData->tls;

        QThreadStorageData::finish((void **)data);

#endif

        // need to clear the state of the mainData, just in case a new QCoreApplication comes along.

        QMutexLocker locker(&threadData->postEventList.mutex);

        for (int i = 0; i < threadData->postEventList.size(); ++i) {

            const QPostEvent &pe = threadData->postEventList.at(i);

            if (pe.event) {

                --pe.receiver->d_func()->postedEvents;

                pe.event->posted = false;

                delete pe.event;

            }

        }

        threadData->postEventList.clear();

        threadData->postEventList.recursion = 0;

        threadData->quitNow = false;

    }

}

void QCoreApplicationPrivate::createEventDispatcher()

{

    Q_Q(QCoreApplication);

#if defined(Q_OS_SYMBIAN)

    eventDispatcher = new QEventDispatcherSymbian(q);

#elif defined(Q_OS_UNIX)

#  if !defined(QT_NO_GLIB)

    if (qgetenv("QT_NO_GLIB").isEmpty() && QEventDispatcherGlib::versionSupported())

        eventDispatcher = new QEventDispatcherGlib(q);

    else

#  endif

        eventDispatcher = new QEventDispatcherUNIX(q);

#elif defined(Q_OS_WIN)

    eventDispatcher = new QEventDispatcherWin32(q);

#else

#  error "QEventDispatcher not yet ported to this platform"

#endif

}

QThread *QCoreApplicationPrivate::theMainThread = 0;

QThread *QCoreApplicationPrivate::mainThread()

{

    Q_ASSERT(theMainThread != 0);

    return theMainThread;

}

#if !defined (QT_NO_DEBUG) || defined (QT_MAC_FRAMEWORK_BUILD)

void QCoreApplicationPrivate::checkReceiverThread(QObject *receiver)

{

    QThread *currentThread = QThread::currentThread();

    QThread *thr = receiver->thread();

    Q_ASSERT_X(currentThread == thr || !thr,

               "QCoreApplication::sendEvent",

               QString::fromLatin1("Cannot send events to objects owned by a different thread. "

                                   "Current thread %1. Receiver '%2' (of type '%3') was created in thread %4")

               .arg(QString::number((quintptr) currentThread, 16))

               .arg(receiver->objectName())

               .arg(QLatin1String(receiver->metaObject()->className()))

               .arg(QString::number((quintptr) thr, 16))

               .toLocal8Bit().data());

    Q_UNUSED(currentThread);

    Q_UNUSED(thr);

}

#elif defined(Q_OS_SYMBIAN) && defined (QT_NO_DEBUG)

// no implementation in release builds, but keep the symbol present

void QCoreApplicationPrivate::checkReceiverThread(QObject * /* receiver */)

{

}

#endif

void QCoreApplicationPrivate::appendApplicationPathToLibraryPaths()

{

#if !defined(QT_NO_LIBRARY) && !defined(QT_NO_SETTINGS)

    QStringList *app_libpaths = coreappdata()->app_libpaths;

    Q_ASSERT(app_libpaths);

# if defined(Q_OS_SYMBIAN)

    QString app_location( QCoreApplication::applicationDirPath() );

    // File existence check for application's private dir requires additional '\' or

    // platform security will not allow it.

    if (app_location !=  QLibraryInfo::location(QLibraryInfo::PluginsPath) && QFile::exists(app_location + QLatin1Char('\\')) && !app_libpaths->contains(app_location))

# else

    QString app_location( QCoreApplication::applicationFilePath() );

    app_location.truncate(app_location.lastIndexOf(QLatin1Char('/')));

    app_location = QDir(app_location).canonicalPath();

    if (QFile::exists(app_location) && !app_libpaths->contains(app_location))

# endif

        app_libpaths->append(app_location);

#endif

}

QString qAppName()

{

    if (!QCoreApplicationPrivate::checkInstance("qAppName"))

        return QString();

    return QCoreApplication::instance()->d_func()->appName();

}

/*!

    \class QCoreApplication

    \brief The QCoreApplication class provides an event loop for console Qt

    applications.

    This class is used by non-GUI applications to provide their event

    loop. For non-GUI application that uses Qt, there should be exactly

    one QCoreApplication object. For GUI applications, see

    QApplication.

    QCoreApplication contains the main event loop, where all events

    from the operating system (e.g., timer and network events) and

    other sources are processed and dispatched. It also handles the

    application's initialization and finalization, as well as

    system-wide and application-wide settings.

    \section1 The Event Loop and Event Handling

    The event loop is started with a call to exec(). Long running

    operations can call processEvents() to keep the application

    responsive.

    In general, we recommend that you create a QCoreApplication or a

    QApplication object in your \c main() function as early as

    possible. exec() will not return until the event loop exits; e.g.,

    when quit() is called.

    Several static convenience functions are also provided. The

    QCoreApplication object is available from instance(). Events can

    be sent or posted using sendEvent(), postEvent(), and

    sendPostedEvents(). Pending events can be removed with

    removePostedEvents() or flushed with flush().

    The class provides a quit() slot and an aboutToQuit() signal.

    \section1 Application and Library Paths

    An application has an applicationDirPath() and an

    applicationFilePath(). Library paths (see QLibrary) can be retrieved

    with libraryPaths() and manipulated by setLibraryPaths(), addLibraryPath(),

    and removeLibraryPath().

    \section1 Internationalization and Translations

    Translation files can be added or removed

    using installTranslator() and removeTranslator(). Application

    strings can be translated using translate(). The QObject::tr()

    and QObject::trUtf8() functions are implemented in terms of

    translate().

    \section1 Accessing Command Line Arguments

    The command line arguments which are passed to QCoreApplication's

    constructor should be accessed using the arguments() function.

    Note that some arguments supplied by the user may have been

    processed and removed by QCoreApplication.

    In cases where command line arguments need to be obtained using the

    argv() function, you must convert them from the local string encoding

    using QString::fromLocal8Bit().

    \section1 Locale Settings

    On Unix/Linux Qt is configured to use the system locale settings by

    default. This can cause a conflict when using POSIX functions, for

    instance, when converting between data types such as floats and

    strings, since the notation may differ between locales. To get

    around this problem, call the POSIX function \c{setlocale(LC_NUMERIC,"C")}

    right after initializing QApplication or QCoreApplication to reset

    the locale that is used for number formatting to "C"-locale.

    \sa QApplication, QAbstractEventDispatcher, QEventLoop,

    {Semaphores Example}, {Wait Conditions Example}

*/

/*!

    \fn static QCoreApplication *QCoreApplication::instance()

    Returns a pointer to the application's QCoreApplication (or

    QApplication) instance.

    If no instance has been allocated, \c null is returned.

*/

/*!\internal

 */

QCoreApplication::QCoreApplication(QCoreApplicationPrivate &p)

    : QObject(p, 0)

{

    init();

    // note: it is the subclasses' job to call

    // QCoreApplicationPrivate::eventDispatcher->startingUp();

}

/*!

    Flushes the platform specific event queues.

    If you are doing graphical changes inside a loop that does not

    return to the event loop on asynchronous window systems like X11

    or double buffered window systems like Mac OS X, and you want to

    visualize these changes immediately (e.g. Splash Screens), call

    this function.

    \sa sendPostedEvents()

*/

void QCoreApplication::flush()

{

    if (self && self->d_func()->eventDispatcher)

        self->d_func()->eventDispatcher->flush();

}

/*!

    Constructs a Qt kernel application. Kernel applications are

    applications without a graphical user interface. These type of

    applications are used at the console or as server processes.

    The \a argc and \a argv arguments are processed by the application,

    and made available in a more convenient form by the arguments()

    function.

    \warning The data referred to by \a argc and \a argv must stay valid

    for the entire lifetime of the QCoreApplication object. In addition,

    \a argc must be greater than zero and \a argv must contain at least

    one valid character string.

*/

QCoreApplication::QCoreApplication(int &argc, char **argv)

    : QObject(*new QCoreApplicationPrivate(argc, argv, 0x040000))

{

    init();

    QCoreApplicationPrivate::eventDispatcher->startingUp();

#if defined(Q_OS_SYMBIAN) && !defined(QT_NO_LIBRARY)

    // Refresh factoryloader, as text codecs are requested during lib path

    // resolving process and won't be therefore properly loaded.

    // Unknown if this is symbian specific issue.

    QFactoryLoader::refreshAll();

#endif

#if defined(Q_OS_SYMBIAN) && !defined(QT_NO_SYSTEMLOCALE)

    d_func()->symbianInit();

#endif

}

QCoreApplication::QCoreApplication(int &argc, char **argv, int _internal)

: QObject(*new QCoreApplicationPrivate(argc, argv, _internal))

{

    init();

    QCoreApplicationPrivate::eventDispatcher->startingUp();

#if defined(Q_OS_SYMBIAN)

#ifndef QT_NO_LIBRARY

    // Refresh factoryloader, as text codecs are requested during lib path

    // resolving process and won't be therefore properly loaded.

    // Unknown if this is symbian specific issue.

    QFactoryLoader::refreshAll();

#endif

#ifndef QT_NO_SYSTEMLOCALE

    d_func()->symbianInit();

#endif

#endif //Q_OS_SYMBIAN

}

// ### move to QCoreApplicationPrivate constructor?

void QCoreApplication::init()

{

    Q_D(QCoreApplication);

#ifdef Q_OS_UNIX

    setlocale(LC_ALL, "");                // use correct char set mapping

    qt_locale_initialized = true;

#endif

    Q_ASSERT_X(!self, "QCoreApplication", "there should be only one application object");

    QCoreApplication::self = this;

#ifdef Q_OS_SYMBIAN

    //ensure temp and working directories exist

    QFileSystemEngine::createDirectory(QFileSystemEntry(QFileSystemEngine::tempPath()), true);

    QFileSystemEngine::createDirectory(QFileSystemEntry(QFileSystemEngine::currentPath()), true);

#endif

#ifndef QT_NO_THREAD

    QThread::initialize();

#endif

    // use the event dispatcher created by the app programmer (if any)

    if (!QCoreApplicationPrivate::eventDispatcher)

        QCoreApplicationPrivate::eventDispatcher = d->threadData->eventDispatcher;

    // otherwise we create one

    if (!QCoreApplicationPrivate::eventDispatcher)

        d->createEventDispatcher();

    Q_ASSERT(QCoreApplicationPrivate::eventDispatcher != 0);

    if (!QCoreApplicationPrivate::eventDispatcher->parent())

        QCoreApplicationPrivate::eventDispatcher->moveToThread(d->threadData->thread);

    d->threadData->eventDispatcher = QCoreApplicationPrivate::eventDispatcher;

#if !defined(QT_NO_LIBRARY) && !defined(QT_NO_SETTINGS)

    if (!coreappdata()->app_libpaths) {

        // make sure that library paths is initialized

        libraryPaths();

    } else {

        d->appendApplicationPathToLibraryPaths();

    }

#endif

#if defined(Q_OS_UNIX) && !(defined(QT_NO_PROCESS))

    // Make sure the process manager thread object is created in the main

    // thread.

    QProcessPrivate::initializeProcessManager();

#endif

#ifdef QT_EVAL

    extern void qt_core_eval_init(uint);

    qt_core_eval_init(d->application_type);

#endif

#if    defined(Q_OS_SYMBIAN)  \

    && defined(Q_CC_NOKIAX86) \

    && defined(QT_DEBUG)

    /**

     * Prevent the executable from being locked in the Symbian emulator. The

     * code dramatically simplifies debugging on Symbian, but beyond that has

     * no impact.

     *

     * Force the ZLazyUnloadTimer to fire and therefore unload code segments

     * immediately. The code affects Symbian's file server and on the other

     * hand needs only to be run once in each emulator run.

     */

    {

        RLoader loader;

        CleanupClosePushL(loader);

        User::LeaveIfError(loader.Connect());

        User::LeaveIfError(loader.CancelLazyDllUnload());

        CleanupStack::PopAndDestroy(&loader);

    }

#endif

    qt_startup_hook();

}

#if defined(Q_OS_SYMBIAN) && !defined(QT_NO_SYSTEMLOCALE)

void QCoreApplicationPrivate::symbianInit()

{

    if (!environmentChangeNotifier)

        environmentChangeNotifier.reset(new QEnvironmentChangeNotifier);

}

#endif

/*!

    Destroys the QCoreApplication object.

*/

QCoreApplication::~QCoreApplication()

{

    qt_call_post_routines();

    self = 0;

    QCoreApplicationPrivate::is_app_closing = true;

    QCoreApplicationPrivate::is_app_running = false;

#if !defined(QT_NO_THREAD)

#if !defined(QT_NO_CONCURRENT)

    // Synchronize and stop the global thread pool threads.

    QThreadPool *globalThreadPool = 0;

    QT_TRY {

        globalThreadPool = QThreadPool::globalInstance();

    } QT_CATCH (...) {

        // swallow the exception, since destructors shouldn't throw

    }

    if (globalThreadPool)

        globalThreadPool->waitForDone();

#endif

    QThread::cleanup();

#endif

    d_func()->threadData->eventDispatcher = 0;

    if (QCoreApplicationPrivate::eventDispatcher)

        QCoreApplicationPrivate::eventDispatcher->closingDown();

    QCoreApplicationPrivate::eventDispatcher = 0;

#ifndef QT_NO_LIBRARY

    delete coreappdata()->app_libpaths;

    coreappdata()->app_libpaths = 0;

#endif

}

/*!

    Sets the attribute \a attribute if \a on is true;

    otherwise clears the attribute.

    One of the attributes that can be set with this method is

    Qt::AA_ImmediateWidgetCreation. It tells Qt to create toplevel

    windows immediately. Normally, resources for widgets are allocated

    on demand to improve efficiency and minimize resource usage.

    Therefore, if it is important to minimize resource consumption, do

    not set this attribute.

    \sa testAttribute()

*/

void QCoreApplication::setAttribute(Qt::ApplicationAttribute attribute, bool on)

{

    if (on)

        QCoreApplicationPrivate::attribs |= 1 << attribute;

    else

        QCoreApplicationPrivate::attribs &= ~(1 << attribute);

#ifdef Q_OS_MAC

    // Turn on the no native menubar here, since we used to

    // do this implicitly. We DO NOT flip it off if someone sets

    // it to false.

    // Ideally, we'd have magic that would be something along the lines of

    // "follow MacPluginApplication" unless explicitly set.

    // Considering this attribute isn't only at the beginning

    // it's unlikely it will ever be a problem, but I want

    // to have the behavior documented here.

    if (attribute == Qt::AA_MacPluginApplication && on

          && !testAttribute(Qt::AA_DontUseNativeMenuBar)) {

        setAttribute(Qt::AA_DontUseNativeMenuBar, true);

    }

#endif

}

/*!

  Returns true if attribute \a attribute is set;

  otherwise returns false.

  \sa setAttribute()

 */

bool QCoreApplication::testAttribute(Qt::ApplicationAttribute attribute)

{

    return QCoreApplicationPrivate::testAttribute(attribute);

}

/*!

  \internal

  This function is here to make it possible for Qt extensions to

  hook into event notification without subclassing QApplication

*/

bool QCoreApplication::notifyInternal(QObject *receiver, QEvent *event)

{

    // Make it possible for Qt Jambi and QSA to hook into events even

    // though QApplication is subclassed...

    bool result = false;

    void *cbdata[] = { receiver, event, &result };

    if (QInternal::activateCallbacks(QInternal::EventNotifyCallback, cbdata)) {

        return result;

    }

    // Qt enforces the rule that events can only be sent to objects in

    // the current thread, so receiver->d_func()->threadData is

    // equivalent to QThreadData::current(), just without the function

    // call overhead.

    QObjectPrivate *d = receiver->d_func();

    QThreadData *threadData = d->threadData;

    ++threadData->loopLevel;

#ifdef QT_JAMBI_BUILD

    int deleteWatch = 0;

    int *oldDeleteWatch = QObjectPrivate::setDeleteWatch(d, &deleteWatch);

    bool inEvent = d->inEventHandler;

    d->inEventHandler = true;

#endif

    bool returnValue;

    QT_TRY {

        returnValue = notify(receiver, event);

    } QT_CATCH (...) {

        --threadData->loopLevel;

        QT_RETHROW;

    }

#ifdef QT_JAMBI_BUILD

    // Restore the previous state if the object was not deleted..

    if (!deleteWatch) {

        d->inEventHandler = inEvent;

    }

    QObjectPrivate::resetDeleteWatch(d, oldDeleteWatch, deleteWatch);

#endif

    --threadData->loopLevel;

    return returnValue;

}

/*!

  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

  any object in any thread.

  For certain types of events (e.g. mouse and key events),

  the event will be propagated to the receiver's parent and so on up to

  the top-level object if the receiver is not interested in the event

  (i.e., it returns false).

  There are five different ways that events can be processed;

  reimplementing this virtual function is just one of them. All five

  approaches are listed below:

  \list 1

  \i Reimplementing paintEvent(), mousePressEvent() and so

  on. This is the commonest, easiest and least powerful way.

  \i Reimplementing this function. This is very powerful, providing

  complete control; but only one subclass can be active at a time.

  \i Installing an event filter on QCoreApplication::instance(). Such

  an event filter is able to process all events for all widgets, so

  it's just as powerful as reimplementing notify(); furthermore, it's

  possible to have more than one application-global event filter.

  Global event filters even see mouse events for

  \l{QWidget::isEnabled()}{disabled widgets}. Note that application

  event filters are only called for objects that live in the main

  thread.

  \i Reimplementing QObject::event() (as QWidget does). If you do

  this you get Tab key presses, and you get to see the events before

  any widget-specific event filters.

  \i Installing an event filter on the object. Such an event filter gets all

  the events, including Tab and Shift+Tab key press events, as long as they

  do not change the focus widget.

  \endlist

  \sa QObject::event(), installEventFilter()

*/

bool QCoreApplication::notify(QObject *receiver, QEvent *event)

{

    Q_D(QCoreApplication);

    // no events are delivered after ~QCoreApplication() has started

    if (QCoreApplicationPrivate::is_app_closing)

        return true;

    if (receiver == 0) {                        // serious error

        qWarning("QCoreApplication::notify: Unexpected null receiver");

        return true;

    }

#ifndef QT_NO_DEBUG

    d->checkReceiverThread(receiver);

#endif

    return receiver->isWidgetType() ? false : d->notify_helper(receiver, event);

}

bool QCoreApplicationPrivate::sendThroughApplicationEventFilters(QObject *receiver, QEvent *event)

{

    if (receiver->d_func()->threadData == this->threadData) {

        // application event filters are only called for objects in the GUI thread

        for (int i = 0; i < eventFilters.size(); ++i) {

            register QObject *obj = eventFilters.at(i);

            if (!obj)

                continue;

            if (obj->d_func()->threadData != threadData) {

                qWarning("QCoreApplication: Application event filter cannot be in a different thread.");

                continue;

            }

            if (obj->eventFilter(receiver, event))

                return true;

        }

    }

    return false;

}

bool QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject *receiver, QEvent *event)

{

    Q_Q(QCoreApplication);

    if (receiver != q) {

        for (int i = 0; i < receiver->d_func()->eventFilters.size(); ++i) {

            register QObject *obj = receiver->d_func()->eventFilters.at(i);

            if (!obj)

                continue;

            if (obj->d_func()->threadData != receiver->d_func()->threadData) {

                qWarning("QCoreApplication: Object event filter cannot be in a different thread.");

                continue;

            }

            if (obj->eventFilter(receiver, event))

                return true;

        }

    }

    return false;

}

/*!\internal

  Helper function called by notify()

 */

bool QCoreApplicationPrivate::notify_helper(QObject *receiver, QEvent * event)

{

    // send to all application event filters

    if (sendThroughApplicationEventFilters(receiver, event))

        return true;

    // send to all receiver event filters

    if (sendThroughObjectEventFilters(receiver, event))

        return true;

    // deliver the event

    return receiver->event(event);

}

/*!

  Returns true if an application object has not been created yet;

  otherwise returns false.

  \sa closingDown()

*/

bool QCoreApplication::startingUp()

{

    return !QCoreApplicationPrivate::is_app_running;

}

/*!

  Returns true if the application objects are being destroyed;

  otherwise returns false.

  \sa startingUp()

*/

bool QCoreApplication::closingDown()

{

    return QCoreApplicationPrivate::is_app_closing;

}

/*!

    Processes all pending events for the calling thread according to

    the specified \a flags until there are no more events to process.

    You can call this function occasionally when your program is busy

    performing a long operation (e.g. copying a file).

    In event you are running a local loop which calls this function

    continuously, without an event loop, the

    \l{QEvent::DeferredDelete}{DeferredDelete} events will

    not be processed. This can affect the behaviour of widgets,

    e.g. QToolTip, that rely on \l{QEvent::DeferredDelete}{DeferredDelete}

    events to function properly. An alternative would be to call

    \l{QCoreApplication::sendPostedEvents()}{sendPostedEvents()} from

    within that local loop.

    Calling this function processes events only for the calling thread.

    \threadsafe

    \sa exec(), QTimer, QEventLoop::processEvents(), flush(), sendPostedEvents()

*/

void QCoreApplication::processEvents(QEventLoop::ProcessEventsFlags flags)

{

    QThreadData *data = QThreadData::current();

    if (!data->eventDispatcher)

        return;

    if (flags & QEventLoop::DeferredDeletion)

        QCoreApplication::sendPostedEvents(0, QEvent::DeferredDelete);

    data->eventDispatcher->processEvents(flags);

}

/*!

    \overload processEvents()

    Processes pending events for the calling thread for \a maxtime

    milliseconds or until there are no more events to process,

    whichever is shorter.

    You can call this function occasionally when you program is busy

    doing a long operation (e.g. copying a file).

    Calling this function processes events only for the calling thread.

    \threadsafe

    \sa exec(), QTimer, QEventLoop::processEvents()

*/

void QCoreApplication::processEvents(QEventLoop::ProcessEventsFlags flags, int maxtime)

{

    QThreadData *data = QThreadData::current();

    if (!data->eventDispatcher)

        return;

    QElapsedTimer start;

    start.start();

    if (flags & QEventLoop::DeferredDeletion)

        QCoreApplication::sendPostedEvents(0, QEvent::DeferredDelete);

    while (data->eventDispatcher->processEvents(flags & ~QEventLoop::WaitForMoreEvents)) {

        if (start.elapsed() > maxtime)

            break;

        if (flags & QEventLoop::DeferredDeletion)

            QCoreApplication::sendPostedEvents(0, QEvent::DeferredDelete);

    }

}

/*****************************************************************************

  Main event loop wrappers

 *****************************************************************************/

/*!

    Enters the main event loop and waits until exit() is called.

    Returns the value that was set to exit() (which is 0 if exit() is

    called via quit()).

    It is necessary to call this function to start event handling. The

    main event loop receives events from the window system and

    dispatches these to the application widgets.

    To make your application perform idle processing (i.e. executing a

    special function whenever there are no pending events), use a

    QTimer with 0 timeout. More advanced idle processing schemes can

    be achieved using processEvents().

    We recommend that you connect clean-up code to the

    \l{QCoreApplication::}{aboutToQuit()} signal, instead of putting it in

    your application's \c{main()} function because on some platforms the

    QCoreApplication::exec() call may not return. For example, on Windows

    when the user logs off, the system terminates the process after Qt

    closes all top-level windows. Hence, there is no guarantee that the

    application will have time to exit its event loop and execute code at

    the end of the \c{main()} function after the QCoreApplication::exec()

    call.

    \sa quit(), exit(), processEvents(), QApplication::exec()

*/

int QCoreApplication::exec()

{

    if (!QCoreApplicationPrivate::checkInstance("exec"))

        return -1;

    QThreadData *threadData = self->d_func()->threadData;

    if (threadData != QThreadData::current()) {

        qWarning("%s::exec: Must be called from the main thread", self->metaObject()->className());

        return -1;

    }

    if (!threadData->eventLoops.isEmpty()) {

        qWarning("QCoreApplication::exec: The event loop is already running");

        return -1;

    }

    threadData->quitNow = false;

    QEventLoop eventLoop;

    self->d_func()->in_exec = true;

    self->d_func()->aboutToQuitEmitted = false;

    int returnCode = eventLoop.exec();

    threadData->quitNow = false;

    if (self) {

        self->d_func()->in_exec = false;

        if (!self->d_func()->aboutToQuitEmitted)

            emit self->aboutToQuit();

        self->d_func()->aboutToQuitEmitted = true;

        sendPostedEvents(0, QEvent::DeferredDelete);

    }

    return returnCode;

}

/*!

  Tells the application to exit with a return code.

    After this function has been called, the application leaves the

    main event loop and returns from the call to exec(). The exec()

    function returns \a returnCode. If the event loop is not running,

    this function does nothing.

  By convention, a \a returnCode of 0 means success, and any non-zero

  value indicates an error.

  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.

  \sa quit(), exec()

*/

void QCoreApplication::exit(int returnCode)

{

    if (!self)

        return;

    QThreadData *data = self->d_func()->threadData;

    data->quitNow = true;

    for (int i = 0; i < data->eventLoops.size(); ++i) {

        QEventLoop *eventLoop = data->eventLoops.at(i);

        eventLoop->exit(returnCode);

    }

}

/*****************************************************************************

  QCoreApplication management of posted events

 *****************************************************************************/

/*!

    \fn bool QCoreApplication::sendEvent(QObject *receiver, QEvent *event)

    Sends event \a event directly to receiver \a receiver, using the

    notify() function. Returns the value that was returned from the

    event handler.

    The event is \e not deleted when the event has been sent. The normal

    approach is to create the event on the stack, for example:

    \snippet doc/src/snippets/code/src_corelib_kernel_qcoreapplication.cpp 0

    \sa postEvent(), notify()

*/

/*!

    Adds the event \a event, with the object \a receiver as the

    receiver of the event, to an event queue and returns immediately.

    The event must be allocated on the heap since the post event queue

    will take ownership of the event and delete it once it has been

    posted.  It is \e {not safe} to access the event after

    it has been posted.

    When control returns to the main event loop, all events that are

    stored in the queue will be sent using the notify() function.

    Events are processed in the order posted. For more control over

    the processing order, use the postEvent() overload below, which

    takes a priority argument. This function posts all event with a

    Qt::NormalEventPriority.

    \threadsafe

    \sa sendEvent(), notify(), sendPostedEvents()

*/

void QCoreApplication::postEvent(QObject *receiver, QEvent *event)

{

    postEvent(receiver, event, Qt::NormalEventPriority);

}

/*!

    \overload postEvent()

    \since 4.3

    Adds the event \a event, with the object \a receiver as the

    receiver of the event, to an event queue and returns immediately.

    The event must be allocated on the heap since the post event queue

    will take ownership of the event and delete it once it has been

    posted.  It is \e {not safe} to access the event after

    it has been posted.

    When control returns to the main event loop, all events that are

    stored in the queue will be sent using the notify() function.

    Events are sorted in descending \a priority order, i.e. events

    with a high \a priority are queued before events with a lower \a

    priority. The \a priority can be any integer value, i.e. between

    INT_MAX and INT_MIN, inclusive; see Qt::EventPriority for more

    details. Events with equal \a priority will be processed in the

    order posted.

    \threadsafe

    \sa sendEvent(), notify(), sendPostedEvents(), Qt::EventPriority

*/

void QCoreApplication::postEvent(QObject *receiver, QEvent *event, int priority)

{

    if (receiver == 0) {

        qWarning("QCoreApplication::postEvent: Unexpected null receiver");

        delete event;

        return;

    }

    QThreadData * volatile * pdata = &receiver->d_func()->threadData;

    QThreadData *data = *pdata;

    if (!data) {

        // posting during destruction? just delete the event to prevent a leak

        delete event;

        return;

    }