From 31ef8fa6abc2ea23c6f0a996b36494d88aafb0b5 Mon Sep 17 00:00:00 2001
From: mae <qt-info@nokia.com>
Date: Fri, 29 Apr 2011 11:44:43 +0200
Subject: Reduce open and stat system calls for QSettings

The patch moves the global static QSettings object
from QLibrary to QCoreApplication and reduces a
few stat and open calls.

Without the patch, a large Trolltech.conf was
pushed out of the unused settings cache during
startup, meaning Trolltech.conf was parsed
more than once.

Reviewed-by: Liang Qi
---
 src/corelib/plugin/qlibrary.cpp | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

(limited to 'src/corelib/plugin')

diff --git a/src/corelib/plugin/qlibrary.cpp b/src/corelib/plugin/qlibrary.cpp
index 80e927bcc9..6f3ee1c3d3 100644
--- a/src/corelib/plugin/qlibrary.cpp
+++ b/src/corelib/plugin/qlibrary.cpp
@@ -52,6 +52,7 @@
 #include <qmap.h>
 #include <qsettings.h>
 #include <qdatetime.h>
+#include <private/qcoreapplication_p.h>
 #ifdef Q_OS_MAC
 #  include <private/qcore_mac_p.h>
 #endif
@@ -408,12 +409,6 @@ static bool qt_unix_query(const QString &library, uint *version, bool *debug, QB
 typedef QMap<QString, QLibraryPrivate*> LibraryMap;
 
 struct LibraryData {
-    LibraryData() : settings(0) { }
-    ~LibraryData() {
-        delete settings;
-    }
-
-    QSettings *settings;
     LibraryMap libraryMap;
     QSet<QLibraryPrivate*> loadedLibs;
 };
@@ -711,11 +706,7 @@ bool QLibraryPrivate::isPlugin(QSettings *settings)
     QStringList reg;
 #ifndef QT_NO_SETTINGS
     if (!settings) {
-        settings = libraryData()->settings;
-        if (!settings) {
-            settings = new QSettings(QSettings::UserScope, QLatin1String("Trolltech"));
-            libraryData()->settings = settings;
-        }
+        settings = QCoreApplicationPrivate::trolltechConf;
     }
     reg = settings->value(regkey).toStringList();
 #endif
-- 
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