Wake host on a separate worker thread to avoid hanging the UI for DNS resolution

app/backend/computermanager.cpp

@@ -177,6 +177,11 @@ bool NvComputer::wake()
     for (QString& addressString : addressList) {
         QHostInfo hostInfo = QHostInfo::fromName(addressString);
 
+        if (hostInfo.error() != QHostInfo::NoError) {
+            qWarning() << "Error resolving" << addressString << ":" << hostInfo.errorString();
+            continue;
+        }
+
         // Try all IP addresses that this string resolves to
         for (QHostAddress& address : hostInfo.addresses()) {
             QUdpSocket sock;

app/gui/computermodel.cpp

@@ -1,5 +1,7 @@
 #include "computermodel.h"
 
+#include <QThreadPool>
+
 ComputerModel::ComputerModel(QObject* object)
     : QAbstractListModel(object) {}
 
@@ -119,11 +121,27 @@ void ComputerModel::deleteComputer(int computerIndex)
     endRemoveRows();
 }
 
-bool ComputerModel::wakeComputer(int computerIndex)
+class DeferredWakeHostTask : public QRunnable
+{
+public:
+    DeferredWakeHostTask(NvComputer* computer)
+        : m_Computer(computer) {}
+
+    void run()
+    {
+        m_Computer->wake();
+    }
+
+private:
+    NvComputer* m_Computer;
+};
+
+void ComputerModel::wakeComputer(int computerIndex)
 {
     Q_ASSERT(computerIndex < m_Computers.count());
 
-    return m_Computers[computerIndex]->wake();
+    DeferredWakeHostTask* wakeTask = new DeferredWakeHostTask(m_Computers[computerIndex]);
+    QThreadPool::globalInstance()->start(wakeTask);
 }
 
 void ComputerModel::pairComputer(int computerIndex, QString pin)

app/gui/computermodel.h

@@ -34,7 +34,7 @@ public:
 
     Q_INVOKABLE void pairComputer(int computerIndex, QString pin);
 
-    Q_INVOKABLE bool wakeComputer(int computerIndex);
+    Q_INVOKABLE void wakeComputer(int computerIndex);
 
     Q_INVOKABLE Session* createSessionForCurrentGame(int computerIndex);