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qt: Move initialization/shutdown to a thread

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Move AppInit2 and Shutdown to a thread.

This allows a more responsive splash screen, prevents 'process does not respond'
messages from the window system and will allow for showing a user friendly
window while shutting down.
This commit is contained in:
Wladimir J. van der Laan 2014-01-07 11:30:17 +01:00
parent 6a0e2376a1
commit 202d853bbe
3 changed files with 301 additions and 114 deletions
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2
src/qt/Makefile.am
View file

@ -108,7 +108,7 @@ QT_MOC_CPP = moc_aboutdialog.cpp moc_addressbookpage.cpp \
BITCOIN_MM = macdockiconhandler.mm macnotificationhandler.mm
QT_MOC = intro.moc overviewpage.moc rpcconsole.moc
QT_MOC = intro.moc overviewpage.moc rpcconsole.moc bitcoin.moc
QT_QRC_CPP = qrc_bitcoin.cpp
QT_QRC = bitcoin.qrc

411
src/qt/bitcoin.cpp
View file

@ -30,6 +30,8 @@
#include <QSettings>
#include <QTimer>
#include <QTranslator>
#include <QWeakPointer>
#include <QThread>
#if defined(QT_STATICPLUGIN)
#include <QtPlugin>
@ -52,18 +54,18 @@ Q_IMPORT_PLUGIN(QWindowsIntegrationPlugin);
// Declare meta types used for QMetaObject::invokeMethod
Q_DECLARE_METATYPE(bool*)
// Need a global reference for the notifications to find the GUI
static BitcoinGUI *guiref;
static SplashScreen *splashref;
// Need a global reference for the notifications to find the GUI and splash screen
static QWeakPointer<BitcoinGUI> guiref;
static QWeakPointer<SplashScreen> splashref;
static bool ThreadSafeMessageBox(const std::string& message, const std::string& caption, unsigned int style)
{
if(guiref)
if(!guiref.isNull())
{
bool modal = (style & CClientUIInterface::MODAL);
bool ret = false;
// In case of modal message, use blocking connection to wait for user to click a button
QMetaObject::invokeMethod(guiref, "message",
QMetaObject::invokeMethod(guiref.data(), "message",
modal ? GUIUtil::blockingGUIThreadConnection() : Qt::QueuedConnection,
Q_ARG(QString, QString::fromStdString(caption)),
Q_ARG(QString, QString::fromStdString(message)),
@ -81,10 +83,13 @@ static bool ThreadSafeMessageBox(const std::string& message, const std::string&
static void InitMessage(const std::string &message)
{
if(splashref)
if(!splashref.isNull())
{
splashref->showMessage(QString::fromStdString(message), Qt::AlignBottom|Qt::AlignHCenter, QColor(55,55,55));
qApp->processEvents();
QMetaObject::invokeMethod(splashref.data(), "showMessage",
Qt::QueuedConnection,
Q_ARG(QString, QString::fromStdString(message)),
Q_ARG(int, Qt::AlignBottom|Qt::AlignHCenter),
Q_ARG(QColor, QColor(55,55,55)));
}
LogPrintf("init message: %s\n", message.c_str());
}
@ -97,15 +102,6 @@ static std::string Translate(const char* psz)
return QCoreApplication::translate("bitcoin-core", psz).toStdString();
}
/* Handle runaway exceptions. Shows a message box with the problem and quits the program.
*/
static void handleRunawayException(std::exception *e)
{
PrintExceptionContinue(e, "Runaway exception");
QMessageBox::critical(0, "Runaway exception", BitcoinGUI::tr("A fatal error occurred. Bitcoin can no longer continue safely and will quit.") + QString("\n\n") + QString::fromStdString(strMiscWarning));
exit(1);
}
/** Set up translations */
static void initTranslations(QTranslator &qtTranslatorBase, QTranslator &qtTranslator, QTranslator &translatorBase, QTranslator &translator)
{
@ -162,6 +158,265 @@ void DebugMessageHandler(QtMsgType type, const QMessageLogContext& context, cons
}
#endif
/** Class encapsulating Bitcoin Core startup and shutdown.
* Allows running startup and shutdown in a different thread from the UI thread.
*/
class BitcoinCore: public QObject
{
Q_OBJECT
public:
explicit BitcoinCore();
public slots:
void initialize();
void shutdown();
signals:
void initializeResult(int retval);
void shutdownResult(int retval);
void runawayException(const QString &message);
private:
boost::thread_group threadGroup;
/// Pass fatal exception message to UI thread
void handleRunawayException(std::exception *e);
};
/** Main Bitcoin application object */
class BitcoinApplication: public QApplication
{
Q_OBJECT
public:
explicit BitcoinApplication(int &argc, char **argv);
~BitcoinApplication();
/// Create payment server
void createPaymentServer();
/// Create options model
void createOptionsModel();
/// Create main window
void createWindow(bool isaTestNet);
/// Request core initialization
void requestInitialize();
/// Request core shutdown
void requestShutdown();
/// Get process return value
int getReturnValue() { return returnValue; }
public slots:
void initializeResult(int retval);
void shutdownResult(int retval);
/// Handle runaway exceptions. Shows a message box with the problem and quits the program.
void handleRunawayException(const QString &message);
signals:
void requestedInitialize();
void requestedShutdown();
void stopThread();
private:
QThread *coreThread;
PaymentServer* paymentServer;
OptionsModel *optionsModel;
ClientModel *clientModel;
BitcoinGUI *window;
WalletModel *walletModel;
int returnValue;
void startThread();
};
#include "bitcoin.moc"
BitcoinCore::BitcoinCore():
QObject()
{
}
void BitcoinCore::handleRunawayException(std::exception *e)
{
PrintExceptionContinue(e, "Runaway exception");
emit runawayException(QString::fromStdString(strMiscWarning));
}
void BitcoinCore::initialize()
{
try
{
LogPrintf("Running AppInit2 in thread\n");
int rv = AppInit2(threadGroup);
emit initializeResult(rv);
} catch (std::exception& e) {
handleRunawayException(&e);
} catch (...) {
handleRunawayException(NULL);
}
}
void BitcoinCore::shutdown()
{
try
{
LogPrintf("Running Shutdown in thread\n");
threadGroup.interrupt_all();
threadGroup.join_all();
Shutdown();
LogPrintf("Shutdown finished\n");
emit shutdownResult(1);
} catch (std::exception& e) {
handleRunawayException(&e);
} catch (...) {
handleRunawayException(NULL);
}
}
BitcoinApplication::BitcoinApplication(int &argc, char **argv):
QApplication(argc, argv),
coreThread(0),
paymentServer(0),
optionsModel(0),
clientModel(0),
window(0),
walletModel(0),
returnValue(0)
{
setQuitOnLastWindowClosed(false);
startThread();
}
BitcoinApplication::~BitcoinApplication()
{
LogPrintf("Stopping thread\n");
emit stopThread();
coreThread->wait();
LogPrintf("Stopped thread\n");
}
void BitcoinApplication::createPaymentServer()
{
paymentServer = new PaymentServer(this);
}
void BitcoinApplication::createOptionsModel()
{
optionsModel = new OptionsModel();
}
void BitcoinApplication::createWindow(bool isaTestNet)
{
window = new BitcoinGUI(isaTestNet, 0);
guiref = window;
QTimer* pollShutdownTimer = new QTimer(window);
connect(pollShutdownTimer, SIGNAL(timeout()), window, SLOT(detectShutdown()));
pollShutdownTimer->start(200);
}
void BitcoinApplication::startThread()
{
coreThread = new QThread(this);
BitcoinCore *executor = new BitcoinCore();
executor->moveToThread(coreThread);
/* communication to and from thread */
connect(executor, SIGNAL(initializeResult(int)), this, SLOT(initializeResult(int)));
connect(executor, SIGNAL(shutdownResult(int)), this, SLOT(shutdownResult(int)));
connect(executor, SIGNAL(runawayException(QString)), this, SLOT(handleRunawayException(QString)));
connect(this, SIGNAL(requestedInitialize()), executor, SLOT(initialize()));
connect(this, SIGNAL(requestedShutdown()), executor, SLOT(shutdown()));
/* make sure executor object is deleted in its own thread */
connect(this, SIGNAL(stopThread()), executor, SLOT(deleteLater()));
connect(this, SIGNAL(stopThread()), coreThread, SLOT(quit()));
coreThread->start();
}
void BitcoinApplication::requestInitialize()
{
LogPrintf("Requesting initialize\n");
emit requestedInitialize();
}
void BitcoinApplication::requestShutdown()
{
LogPrintf("Requesting shutdown\n");
window->hide();
window->setClientModel(0);
window->removeAllWallets();
guiref.clear();
delete walletModel;
emit requestedShutdown();
}
void BitcoinApplication::initializeResult(int retval)
{
LogPrintf("Initialization result: %i\n", retval);
/// Set exit result: 0 if successful, 1 if failure
returnValue = retval ? 0 : 1;
if(retval)
{
optionsModel->Upgrade(); // Must be done after AppInit2
PaymentServer::LoadRootCAs();
paymentServer->setOptionsModel(optionsModel);
if (!splashref.isNull())
splashref.data()->finish(window);
clientModel = new ClientModel(optionsModel);
window->setClientModel(clientModel);
if(pwalletMain)
{
walletModel = new WalletModel(pwalletMain, optionsModel);
window->addWallet("~Default", walletModel);
window->setCurrentWallet("~Default");
connect(walletModel, SIGNAL(coinsSent(CWallet*,SendCoinsRecipient,QByteArray)),
paymentServer, SLOT(fetchPaymentACK(CWallet*,const SendCoinsRecipient&,QByteArray)));
}
// If -min option passed, start window minimized.
if(GetBoolArg("-min", false))
{
window->showMinimized();
}
else
{
window->show();
}
// Now that initialization/startup is done, process any command-line
// bitcoin: URIs or payment requests:
connect(paymentServer, SIGNAL(receivedPaymentRequest(SendCoinsRecipient)),
window, SLOT(handlePaymentRequest(SendCoinsRecipient)));
connect(window, SIGNAL(receivedURI(QString)),
paymentServer, SLOT(handleURIOrFile(QString)));
connect(paymentServer, SIGNAL(message(QString,QString,unsigned int)),
window, SLOT(message(QString,QString,unsigned int)));
QTimer::singleShot(100, paymentServer, SLOT(uiReady()));
} else {
quit(); // Exit main loop
}
}
void BitcoinApplication::shutdownResult(int retval)
{
LogPrintf("Shutdown result: %i\n", retval);
quit(); // Exit main loop after shutdown finished
}
void BitcoinApplication::handleRunawayException(const QString &message)
{
QMessageBox::critical(0, "Runaway exception", BitcoinGUI::tr("A fatal error occurred. Bitcoin can no longer continue safely and will quit.") + QString("\n\n") + message);
::exit(1);
}
#ifndef BITCOIN_QT_TEST
int main(int argc, char *argv[])
{
@ -189,7 +444,7 @@ int main(int argc, char *argv[])
#endif
Q_INIT_RESOURCE(bitcoin);
QApplication app(argc, argv);
BitcoinApplication app(argc, argv);
#if QT_VERSION > 0x050100
// Generate high-dpi pixmaps
QApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
@ -254,7 +509,7 @@ int main(int argc, char *argv[])
// Start up the payment server early, too, so impatient users that click on
// bitcoin: links repeatedly have their payment requests routed to this process:
PaymentServer* paymentServer = new PaymentServer(&app);
app.createPaymentServer();
/// 8. Main GUI initialization
// Install global event filter that makes sure that long tooltips can be word-wrapped
@ -266,24 +521,29 @@ int main(int argc, char *argv[])
qInstallMessageHandler(DebugMessageHandler);
#endif
// Load GUI settings from QSettings
OptionsModel optionsModel;
app.createOptionsModel();
// Subscribe to global signals from core
uiInterface.ThreadSafeMessageBox.connect(ThreadSafeMessageBox);
uiInterface.InitMessage.connect(InitMessage);
uiInterface.Translate.connect(Translate);
// Show splash screen if appropriate
SplashScreen splash(QPixmap(), 0, isaTestNet);
if (GetBoolArg("-splash", true) && !GetBoolArg("-min", false))
// Show help message immediately after parsing command-line options (for "-lang") and setting locale,
// but before showing splash screen.
if (mapArgs.count("-?") || mapArgs.count("--help"))
{
splash.show();
splash.setAutoFillBackground(true);
splashref = &splash;
GUIUtil::HelpMessageBox help;
help.showOrPrint();
return 1;
}
app.processEvents();
app.setQuitOnLastWindowClosed(false);
if (GetBoolArg("-splash", true) && !GetBoolArg("-min", false))
{
SplashScreen *splash = new SplashScreen(QPixmap(), 0, isaTestNet);
splash->setAttribute(Qt::WA_DeleteOnClose);
splash->show();
splashref = splash;
}
try
{
@ -293,93 +553,18 @@ int main(int argc, char *argv[])
if (GUIUtil::GetStartOnSystemStartup())
GUIUtil::SetStartOnSystemStartup(true);
#endif
boost::thread_group threadGroup;
BitcoinGUI window(isaTestNet, 0);
guiref = &window;
QTimer* pollShutdownTimer = new QTimer(guiref);
QObject::connect(pollShutdownTimer, SIGNAL(timeout()), guiref, SLOT(detectShutdown()));
pollShutdownTimer->start(200);
if(AppInit2(threadGroup))
{
{
// Put this in a block, so that the Model objects are cleaned up before
// calling Shutdown().
optionsModel.Upgrade(); // Must be done after AppInit2
PaymentServer::LoadRootCAs();
paymentServer->setOptionsModel(&optionsModel);
if (splashref)
splash.finish(&window);
ClientModel clientModel(&optionsModel);
window.setClientModel(&clientModel);
WalletModel *walletModel = 0;
if(pwalletMain)
walletModel = new WalletModel(pwalletMain, &optionsModel);
if(walletModel)
{
window.addWallet("~Default", walletModel);
window.setCurrentWallet("~Default");
}
// If -min option passed, start window minimized.
if(GetBoolArg("-min", false))
{
window.showMinimized();
}
else
{
window.show();
}
// Now that initialization/startup is done, process any command-line
// bitcoin: URIs or payment requests:
QObject::connect(paymentServer, SIGNAL(receivedPaymentRequest(SendCoinsRecipient)),
&window, SLOT(handlePaymentRequest(SendCoinsRecipient)));
QObject::connect(&window, SIGNAL(receivedURI(QString)),
paymentServer, SLOT(handleURIOrFile(QString)));
if(walletModel)
{
QObject::connect(walletModel, SIGNAL(coinsSent(CWallet*,SendCoinsRecipient,QByteArray)),
paymentServer, SLOT(fetchPaymentACK(CWallet*,const SendCoinsRecipient&,QByteArray)));
}
QObject::connect(paymentServer, SIGNAL(message(QString,QString,unsigned int)),
guiref, SLOT(message(QString,QString,unsigned int)));
QTimer::singleShot(100, paymentServer, SLOT(uiReady()));
app.exec();
window.hide();
window.setClientModel(0);
window.removeAllWallets();
guiref = 0;
delete walletModel;
}
// Shutdown the core and its threads, but don't exit the GUI here
threadGroup.interrupt_all();
threadGroup.join_all();
Shutdown();
}
else
{
threadGroup.interrupt_all();
threadGroup.join_all();
Shutdown();
return 1;
}
app.createWindow(isaTestNet);
app.requestInitialize();
app.exec();
app.requestShutdown();
app.exec();
} catch (std::exception& e) {
handleRunawayException(&e);
PrintExceptionContinue(&e, "Runaway exception");
app.handleRunawayException(QString::fromStdString(strMiscWarning));
} catch (...) {
handleRunawayException(NULL);
PrintExceptionContinue(NULL, "Runaway exception");
app.handleRunawayException(QString::fromStdString(strMiscWarning));
}
return 0;
return app.getReturnValue();
}
#endif // BITCOIN_QT_TEST

2
src/qt/splashscreen.cpp
View file

@ -13,6 +13,8 @@
SplashScreen::SplashScreen(const QPixmap &pixmap, Qt::WindowFlags f, bool isTestNet) :
QSplashScreen(pixmap, f)
{
setAutoFillBackground(true);
// set reference point, paddings
int paddingRight = 50;
int paddingTop = 50;