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Merge pull request #10657 from jherico/tablet_deadlock

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Attempt to resolve Tablet scripting interface deadlocks
This commit is contained in:
Brad Davis 2017-06-12 17:06:58 -07:00 committed by GitHub
commit 308e7295cc
1 changed files with 27 additions and 19 deletions
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46
libraries/script-engine/src/TabletScriptingInterface.cpp
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@ -540,7 +540,7 @@ void TabletProxy::gotoWebScreen(const QString& url, const QString& injectedJavaS
QObject* TabletProxy::addButton(const QVariant& properties) {
auto tabletButtonProxy = QSharedPointer<TabletButtonProxy>(new TabletButtonProxy(properties.toMap()));
std::lock_guard<std::mutex> guard(_tabletMutex);
std::unique_lock<std::mutex> guard(_tabletMutex);
_tabletButtonProxies.push_back(tabletButtonProxy);
if (!_toolbarMode && _qmlTabletRoot) {
auto tablet = getQmlTablet();
@ -550,7 +550,6 @@ QObject* TabletProxy::addButton(const QVariant& properties) {
qCCritical(scriptengine) << "Could not find tablet in TabletRoot.qml";
}
} else if (_toolbarMode) {
auto tabletScriptingInterface = DependencyManager::get<TabletScriptingInterface>();
QObject* toolbarProxy = tabletScriptingInterface->getSystemToolbarProxy();
@ -559,6 +558,8 @@ QObject* TabletProxy::addButton(const QVariant& properties) {
connectionType = Qt::BlockingQueuedConnection;
}
guard.unlock();
// copy properties from tablet button proxy to toolbar button proxy.
QObject* toolbarButtonProxy = nullptr;
bool hasResult = QMetaObject::invokeMethod(toolbarProxy, "addButton", connectionType, Q_RETURN_ARG(QObject*, toolbarButtonProxy), Q_ARG(QVariant, tabletButtonProxy->getProperties()));
@ -576,31 +577,38 @@ bool TabletProxy::onHomeScreen() {
}
void TabletProxy::removeButton(QObject* tabletButtonProxy) {
std::lock_guard<std::mutex> guard(_tabletMutex);
std::unique_lock<std::mutex> guard(_tabletMutex);
auto tablet = getQmlTablet();
if (!tablet) {
qCCritical(scriptengine) << "Could not find tablet in TabletRoot.qml";
}
auto iter = std::find(_tabletButtonProxies.begin(), _tabletButtonProxies.end(), tabletButtonProxy);
if (iter != _tabletButtonProxies.end()) {
if (!_toolbarMode && _qmlTabletRoot) {
(*iter)->setQmlButton(nullptr);
if (tablet) {
QMetaObject::invokeMethod(tablet, "removeButtonProxy", Qt::AutoConnection, Q_ARG(QVariant, (*iter)->getProperties()));
}
} else if (_toolbarMode) {
auto tabletScriptingInterface = DependencyManager::get<TabletScriptingInterface>();
QObject* toolbarProxy = tabletScriptingInterface->getSystemToolbarProxy();
// remove button from toolbarProxy
QMetaObject::invokeMethod(toolbarProxy, "removeButton", Qt::AutoConnection, Q_ARG(QVariant, (*iter)->getUuid().toString()));
(*iter)->setToolbarButtonProxy(nullptr);
QSharedPointer<TabletButtonProxy> buttonProxy;
{
auto iter = std::find(_tabletButtonProxies.begin(), _tabletButtonProxies.end(), tabletButtonProxy);
if (iter == _tabletButtonProxies.end()) {
qCWarning(scriptengine) << "TabletProxy::removeButton() could not find button " << tabletButtonProxy;
return;
}
buttonProxy = *iter;
_tabletButtonProxies.erase(iter);
} else {
qCWarning(scriptengine) << "TabletProxy::removeButton() could not find button " << tabletButtonProxy;
}
if (!_toolbarMode && _qmlTabletRoot) {
buttonProxy->setQmlButton(nullptr);
if (tablet) {
guard.unlock();
QMetaObject::invokeMethod(tablet, "removeButtonProxy", Qt::AutoConnection, Q_ARG(QVariant, buttonProxy->getProperties()));
}
} else if (_toolbarMode) {
auto tabletScriptingInterface = DependencyManager::get<TabletScriptingInterface>();
QObject* toolbarProxy = tabletScriptingInterface->getSystemToolbarProxy();
// remove button from toolbarProxy
guard.unlock();
QMetaObject::invokeMethod(toolbarProxy, "removeButton", Qt::AutoConnection, Q_ARG(QVariant, buttonProxy->getUuid().toString()));
buttonProxy->setToolbarButtonProxy(nullptr);
}
}