qmljslocatordata: make access to m_entries threadsafe

Change-Id: I0eb052a98b2240c17dec81974c226b107705c9e4
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/plugins/qmljstools/qmljslocatordata.cpp

@@ -35,6 +35,7 @@
 #include <qmljs/parser/qmljsast_p.h>
 
 #include <QFileInfo>
+#include <QMutexLocker>
 
 using namespace QmlJSTools::Internal;
 using namespace QmlJS;
@@ -180,17 +181,20 @@ protected:
 
 QHash<QString, QList<LocatorData::Entry> > LocatorData::entries() const
 {
+    QMutexLocker l(&m_mutex);
     return m_entries;
 }
 
 void LocatorData::onDocumentUpdated(const QmlJS::Document::Ptr &doc)
 {
     QList<Entry> entries = FunctionFinder().run(doc);
+    QMutexLocker l(&m_mutex);
     m_entries.insert(doc->fileName(), entries);
 }
 
 void LocatorData::onAboutToRemoveFiles(const QStringList &files)
 {
+    QMutexLocker l(&m_mutex);
     foreach (const QString &file, files) {
         m_entries.remove(file);
     }

src/plugins/qmljstools/qmljslocatordata.h

@@ -34,6 +34,7 @@
 
 #include <QObject>
 #include <QHash>
+#include <QMutex>
 
 namespace QmlJSTools {
 namespace Internal {
@@ -69,6 +70,7 @@ private slots:
     void onAboutToRemoveFiles(const QStringList &files);
 
 private:
+    mutable QMutex m_mutex;
     QHash<QString, QList<Entry> > m_entries;
 };