QReadWriteLock replaced with QMutex.

src/core/systemfactory.cpp

@@ -11,13 +11,12 @@
 #include <QString>
 #include <QFile>
 #include <QApplication>
-#include <QReadWriteLock>
 
 
 QPointer<SystemFactory> SystemFactory::s_instance;
 
 SystemFactory::SystemFactory(QObject *parent) : QObject(parent) {
-  m_applicationCloseLock = new QReadWriteLock(QReadWriteLock::NonRecursive);
+  m_applicationCloseLock = new QMutex();
 }
 
 SystemFactory::~SystemFactory() {

src/core/systemfactory.h

@@ -3,11 +3,9 @@
 
 #include <QObject>
 #include <QPointer>
+#include <QMutex>
 
 
-class QReadWriteLock;
-class QMutex;
-
 class SystemFactory : public QObject {
     Q_OBJECT
 
@@ -42,7 +40,7 @@ class SystemFactory : public QObject {
 
 
     // Access to application-wide close lock.
-    inline QReadWriteLock *applicationCloseLock() const {
+    inline QMutex *applicationCloseLock() const {
       return m_applicationCloseLock;
     }
 
@@ -62,7 +60,7 @@ class SystemFactory : public QObject {
     // But of user decides to close the application (in other words,
     // tries to lock the lock for writing), then no other
     // action will be allowed to lock for reading.
-    QReadWriteLock *m_applicationCloseLock;
+    QMutex *m_applicationCloseLock;
 
     static QPointer<SystemFactory> s_instance;
 };

src/gui/feedmessageviewer.cpp

@@ -25,7 +25,6 @@
 #include <QMenu>
 #include <QWidgetAction>
 #include <QThread>
-#include <QReadWriteLock>
 #include <QProgressBar>
 #include <QStatusBar>
 
@@ -99,7 +98,7 @@ void FeedMessageViewer::quitDownloader() {
 }
 
 void FeedMessageViewer::updateSelectedFeeds() {
-  if (SystemFactory::instance()->applicationCloseLock()->tryLockForWrite()) {
+  if (SystemFactory::instance()->applicationCloseLock()->tryLock()) {
     emit feedsUpdateRequested(m_feedsView->selectedFeeds());
   }
   else {
@@ -118,7 +117,7 @@ void FeedMessageViewer::updateSelectedFeeds() {
 }
 
 void FeedMessageViewer::updateAllFeeds() {
-  if (SystemFactory::instance()->applicationCloseLock()->tryLockForWrite()) {
+  if (SystemFactory::instance()->applicationCloseLock()->tryLock()) {
     emit feedsUpdateRequested(m_feedsView->allFeeds());
   }
   else {

src/gui/feedsview.cpp

@@ -76,7 +76,7 @@ void FeedsView::clearSelectedFeeds() {
 }
 
 void FeedsView::addNewStandardCategory() {
-  if (!SystemFactory::instance()->applicationCloseLock()->tryLockForWrite()) {
+  if (!SystemFactory::instance()->applicationCloseLock()->tryLock()) {
     // Lock was not obtained because
     // it is used probably by feed updater or application
     // is quitting.
@@ -115,7 +115,7 @@ void FeedsView::editStandardCategory(FeedsModelStandardCategory *category) {
 }
 
 void FeedsView::addNewStandardFeed() {
-  if (!SystemFactory::instance()->applicationCloseLock()->tryLockForWrite()) {
+  if (!SystemFactory::instance()->applicationCloseLock()->tryLock()) {
     // Lock was not obtained because
     // it is used probably by feed updater or application
     // is quitting.
@@ -154,7 +154,7 @@ void FeedsView::editStandardFeed(FeedsModelStandardFeed *feed) {
 }
 
 void FeedsView::editSelectedItem() {
-  if (!SystemFactory::instance()->applicationCloseLock()->tryLockForWrite()) {
+  if (!SystemFactory::instance()->applicationCloseLock()->tryLock()) {
     // Lock was not obtained because
     // it is used probably by feed updater or application
     // is quitting.
@@ -212,7 +212,7 @@ void FeedsView::editSelectedItem() {
 }
 
 void FeedsView::deleteSelectedItem() {
-  if (!SystemFactory::instance()->applicationCloseLock()->tryLockForWrite()) {
+  if (!SystemFactory::instance()->applicationCloseLock()->tryLock()) {
     // Lock was not obtained because
     // it is used probably by feed updater or application
     // is quitting.

src/gui/formmain.cpp

@@ -175,7 +175,7 @@ void FormMain::onSaveState(QSessionManager &manager) {
 void FormMain::onAboutToQuit() {
   // Make sure that we obtain close lock
   // BEFORE even trying to quit the application.
-  if (SystemFactory::instance()->applicationCloseLock()->tryLockForWrite(CLOSE_LOCK_TIMEOUT)) {
+  if (SystemFactory::instance()->applicationCloseLock()->tryLock(CLOSE_LOCK_TIMEOUT)) {
     // Application obtained permission to close
     // in a safety way.
     qDebug("Close lock obtained safely.");