Stop QHostInfo thread pool when application is about to exit

Ensure that the threadpool QHostInfo uses internally has cleanup its
threads when the application exits. This avoids the warning from
QWaitCondition on Windows (which happens due to thread termination at
application exit).

Task-number: QTBUG-7691
Reviewed-by: mgoetz

2 files changed, 4 insertions, 0 deletions

diff --git a/src/network/kernel/qhostinfo.cpp b/src/network/kernel/qhostinfo.cpp
index 7150fb7..6894978 100644
--- a/src/network/kernel/qhostinfo.cpp
+++ b/src/network/kernel/qhostinfo.cpp
@@ -479,6 +479,7 @@ void QHostInfoRunnable::run()
 QHostInfoLookupManager::QHostInfoLookupManager() : mutex(QMutex::Recursive), wasDeleted(false)
 {
     moveToThread(QCoreApplicationPrivate::mainThread());
+    connect(QCoreApplication::instance(), SIGNAL(destroyed()), SLOT(waitForThreadPoolDone()), Qt::DirectConnection);
     threadPool.setMaxThreadCount(5); // do 5 DNS lookups in parallel
 }
 
diff --git a/src/network/kernel/qhostinfo_p.h b/src/network/kernel/qhostinfo_p.h
index 2b26b07..4fc74e9 100644
--- a/src/network/kernel/qhostinfo_p.h
+++ b/src/network/kernel/qhostinfo_p.h
@@ -184,6 +184,9 @@ protected:
     QMutex mutex;
 
     bool wasDeleted;
+
+private slots:
+    void waitForThreadPoolDone() { threadPool.waitForDone(); }
 };
 
 #endif