QtGui: replace some QMutexLockers with (new) qt_{scoped,unique}_lock()

In QImageReader, also replace a QMutex with a QBasicMutex, making the
code similar to the corresponding code in QPicture.

Change-Id: Ia1cd546eccd3662837762e506235e350b7a08647
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>

2 files changed, 5 insertions, 4 deletions

diff --git a/src/gui/image/qimagereader.cpp b/src/gui/image/qimagereader.cpp
index 6a0763e696..dff24b449a 100644
--- a/src/gui/image/qimagereader.cpp
+++ b/src/gui/image/qimagereader.cpp
@@ -150,7 +150,7 @@
 // factory loader
 #include <qcoreapplication.h>
 #include <private/qfactoryloader_p.h>
-#include <QMutexLocker>
+#include <QtCore/private/qlocking_p.h>
 
 // for qt_getImageText
 #include <private/qimage_p.h>
@@ -186,8 +186,8 @@ static QImageIOHandler *createReadHandlerHelper(QIODevice *device,
     QByteArray suffix;
 
 #ifndef QT_NO_IMAGEFORMATPLUGIN
-    static QMutex mutex;
-    QMutexLocker locker(&mutex);
+    static QBasicMutex mutex;
+    const auto locker = qt_scoped_lock(mutex);
 
     typedef QMultiMap<int, QString> PluginKeyMap;
 
diff --git a/src/gui/image/qpicture.cpp b/src/gui/image/qpicture.cpp
index 8548f1857e..978a07b9f9 100644
--- a/src/gui/image/qpicture.cpp
+++ b/src/gui/image/qpicture.cpp
@@ -57,6 +57,7 @@
 #include "qregexp.h"
 #include "qregion.h"
 #include "qdebug.h"
+#include <QtCore/private/qlocking_p.h>
 
 #include <algorithm>
 
@@ -1427,7 +1428,7 @@ void qt_init_picture_plugins()
     typedef PluginKeyMap::const_iterator PluginKeyMapConstIterator;
 
     static QBasicMutex mutex;
-    QMutexLocker locker(&mutex);
+    const auto locker = qt_scoped_lock(mutex);
     static QFactoryLoader loader(QPictureFormatInterface_iid,
                                  QStringLiteral("/pictureformats"));