Merge commit 'qt/master-stable' into 4.6-merged

Conflicts:
	.gitignore
	configure.exe
	src/corelib/concurrent/qtconcurrentthreadengine.h
	src/corelib/global/qnamespace.h
	src/gui/graphicsview/qgraphicssceneevent.h
	src/gui/kernel/qapplication.cpp
	src/gui/kernel/qapplication.h
	src/gui/kernel/qapplication_p.h
	src/gui/kernel/qapplication_qws.cpp
	src/gui/kernel/qwidget.h
	src/gui/painting/qpaintengine_raster.cpp
	src/gui/text/qfontdatabase.cpp
	src/network/access/qnetworkaccesshttpbackend.cpp
	tests/auto/network-settings.h
	tests/auto/qscriptjstestsuite/qscriptjstestsuite.pro
	tests/auto/qvariant/tst_qvariant.cpp

37 files changed, 194 insertions, 132 deletions

diff --git a/src/corelib/concurrent/qfuture.cpp b/src/corelib/concurrent/qfuture.cpp
index 1840fab..abfa26fc 100644
--- a/src/corelib/concurrent/qfuture.cpp
+++ b/src/corelib/concurrent/qfuture.cpp
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qfuture.h b/src/corelib/concurrent/qfuture.h
index da24db7..47015ee 100644
--- a/src/corelib/concurrent/qfuture.h
+++ b/src/corelib/concurrent/qfuture.h
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qfutureinterface.cpp b/src/corelib/concurrent/qfutureinterface.cpp
index b7589b7..fbeb93e 100644
--- a/src/corelib/concurrent/qfutureinterface.cpp
+++ b/src/corelib/concurrent/qfutureinterface.cpp
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qfutureinterface.h b/src/corelib/concurrent/qfutureinterface.h
index 345bebe..6df1d1a 100644
--- a/src/corelib/concurrent/qfutureinterface.h
+++ b/src/corelib/concurrent/qfutureinterface.h
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qfutureinterface_p.h b/src/corelib/concurrent/qfutureinterface_p.h
index 719d7a1..229d07f 100644
--- a/src/corelib/concurrent/qfutureinterface_p.h
+++ b/src/corelib/concurrent/qfutureinterface_p.h
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qfuturesynchronizer.cpp b/src/corelib/concurrent/qfuturesynchronizer.cpp
index a0e88f3..3b7da87 100644
--- a/src/corelib/concurrent/qfuturesynchronizer.cpp
+++ b/src/corelib/concurrent/qfuturesynchronizer.cpp
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qfuturesynchronizer.h b/src/corelib/concurrent/qfuturesynchronizer.h
index daf65b9..6513c5e 100644
--- a/src/corelib/concurrent/qfuturesynchronizer.h
+++ b/src/corelib/concurrent/qfuturesynchronizer.h
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qfuturewatcher.cpp b/src/corelib/concurrent/qfuturewatcher.cpp
index 39d7698..96c76ae 100644
--- a/src/corelib/concurrent/qfuturewatcher.cpp
+++ b/src/corelib/concurrent/qfuturewatcher.cpp
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qfuturewatcher.h b/src/corelib/concurrent/qfuturewatcher.h
index 75dfd3d..04d5680 100644
--- a/src/corelib/concurrent/qfuturewatcher.h
+++ b/src/corelib/concurrent/qfuturewatcher.h
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qfuturewatcher_p.h b/src/corelib/concurrent/qfuturewatcher_p.h
index d53a1bd..c3424cb 100644
--- a/src/corelib/concurrent/qfuturewatcher_p.h
+++ b/src/corelib/concurrent/qfuturewatcher_p.h
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qrunnable.cpp b/src/corelib/concurrent/qrunnable.cpp
index a581a21..66a66cd 100644
--- a/src/corelib/concurrent/qrunnable.cpp
+++ b/src/corelib/concurrent/qrunnable.cpp
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qrunnable.h b/src/corelib/concurrent/qrunnable.h
index 1f480f4..7c09cdc 100644
--- a/src/corelib/concurrent/qrunnable.h
+++ b/src/corelib/concurrent/qrunnable.h
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qtconcurrentcompilertest.h b/src/corelib/concurrent/qtconcurrentcompilertest.h
index 763750a..2c6bc9c 100644
--- a/src/corelib/concurrent/qtconcurrentcompilertest.h
+++ b/src/corelib/concurrent/qtconcurrentcompilertest.h
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qtconcurrentexception.cpp b/src/corelib/concurrent/qtconcurrentexception.cpp
index cce1c31..87ab25f 100644
--- a/src/corelib/concurrent/qtconcurrentexception.cpp
+++ b/src/corelib/concurrent/qtconcurrentexception.cpp
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qtconcurrentexception.h b/src/corelib/concurrent/qtconcurrentexception.h
index eaa63d8..6819c1b 100644
--- a/src/corelib/concurrent/qtconcurrentexception.h
+++ b/src/corelib/concurrent/qtconcurrentexception.h
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qtconcurrentfilter.cpp b/src/corelib/concurrent/qtconcurrentfilter.cpp
index 4fbda82..4d48dac 100644
--- a/src/corelib/concurrent/qtconcurrentfilter.cpp
+++ b/src/corelib/concurrent/qtconcurrentfilter.cpp
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qtconcurrentfilter.h b/src/corelib/concurrent/qtconcurrentfilter.h
index 3fae7d2..a2c65b4 100644
--- a/src/corelib/concurrent/qtconcurrentfilter.h
+++ b/src/corelib/concurrent/qtconcurrentfilter.h
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qtconcurrentfilterkernel.h b/src/corelib/concurrent/qtconcurrentfilterkernel.h
index 2ee1246..d72f8c6 100644
--- a/src/corelib/concurrent/qtconcurrentfilterkernel.h
+++ b/src/corelib/concurrent/qtconcurrentfilterkernel.h
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qtconcurrentfunctionwrappers.h b/src/corelib/concurrent/qtconcurrentfunctionwrappers.h
index d076f73..36b40ae 100644
--- a/src/corelib/concurrent/qtconcurrentfunctionwrappers.h
+++ b/src/corelib/concurrent/qtconcurrentfunctionwrappers.h
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qtconcurrentiteratekernel.cpp b/src/corelib/concurrent/qtconcurrentiteratekernel.cpp
index bfc0e82..ffbb479 100644
--- a/src/corelib/concurrent/qtconcurrentiteratekernel.cpp
+++ b/src/corelib/concurrent/qtconcurrentiteratekernel.cpp
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qtconcurrentiteratekernel.h b/src/corelib/concurrent/qtconcurrentiteratekernel.h
index 5cf4ebe..b62b7cf 100644
--- a/src/corelib/concurrent/qtconcurrentiteratekernel.h
+++ b/src/corelib/concurrent/qtconcurrentiteratekernel.h
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qtconcurrentmap.cpp b/src/corelib/concurrent/qtconcurrentmap.cpp
index 8880a87..b8c753a 100644
--- a/src/corelib/concurrent/qtconcurrentmap.cpp
+++ b/src/corelib/concurrent/qtconcurrentmap.cpp
@@ -1,7 +1,7 @@
     /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qtconcurrentmap.h b/src/corelib/concurrent/qtconcurrentmap.h
index 0d55a74..73fbdc8 100644
--- a/src/corelib/concurrent/qtconcurrentmap.h
+++ b/src/corelib/concurrent/qtconcurrentmap.h
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qtconcurrentmapkernel.h b/src/corelib/concurrent/qtconcurrentmapkernel.h
index 0c6a5ad..5e8de74 100644
--- a/src/corelib/concurrent/qtconcurrentmapkernel.h
+++ b/src/corelib/concurrent/qtconcurrentmapkernel.h
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qtconcurrentmedian.h b/src/corelib/concurrent/qtconcurrentmedian.h
index a8ad17d..b8faf71 100644
--- a/src/corelib/concurrent/qtconcurrentmedian.h
+++ b/src/corelib/concurrent/qtconcurrentmedian.h
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qtconcurrentreducekernel.h b/src/corelib/concurrent/qtconcurrentreducekernel.h
index 2dad519..5cab9d1 100644
--- a/src/corelib/concurrent/qtconcurrentreducekernel.h
+++ b/src/corelib/concurrent/qtconcurrentreducekernel.h
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qtconcurrentresultstore.cpp b/src/corelib/concurrent/qtconcurrentresultstore.cpp
index 87bb2a7d..9a141f2 100644
--- a/src/corelib/concurrent/qtconcurrentresultstore.cpp
+++ b/src/corelib/concurrent/qtconcurrentresultstore.cpp
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qtconcurrentresultstore.h b/src/corelib/concurrent/qtconcurrentresultstore.h
index c39e921..36dc7c3 100644
--- a/src/corelib/concurrent/qtconcurrentresultstore.h
+++ b/src/corelib/concurrent/qtconcurrentresultstore.h
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qtconcurrentrun.cpp b/src/corelib/concurrent/qtconcurrentrun.cpp
index 068a913..f74d485 100644
--- a/src/corelib/concurrent/qtconcurrentrun.cpp
+++ b/src/corelib/concurrent/qtconcurrentrun.cpp
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qtconcurrentrun.h b/src/corelib/concurrent/qtconcurrentrun.h
index 00938fa..294295c 100644
--- a/src/corelib/concurrent/qtconcurrentrun.h
+++ b/src/corelib/concurrent/qtconcurrentrun.h
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qtconcurrentrunbase.h b/src/corelib/concurrent/qtconcurrentrunbase.h
index 51f5aa1..083f26d 100644
--- a/src/corelib/concurrent/qtconcurrentrunbase.h
+++ b/src/corelib/concurrent/qtconcurrentrunbase.h
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qtconcurrentstoredfunctioncall.h b/src/corelib/concurrent/qtconcurrentstoredfunctioncall.h
index c7aeb9d..2075c58 100644
--- a/src/corelib/concurrent/qtconcurrentstoredfunctioncall.h
+++ b/src/corelib/concurrent/qtconcurrentstoredfunctioncall.h
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qtconcurrentthreadengine.cpp b/src/corelib/concurrent/qtconcurrentthreadengine.cpp
index d6e6057..c6bde85 100644
--- a/src/corelib/concurrent/qtconcurrentthreadengine.cpp
+++ b/src/corelib/concurrent/qtconcurrentthreadengine.cpp
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
@@ -47,6 +47,81 @@ QT_BEGIN_NAMESPACE
 
 namespace QtConcurrent {
 
+ThreadEngineBarrier::ThreadEngineBarrier()
+:count(0) { }
+
+void ThreadEngineBarrier::acquire()
+{
+    forever {
+        int localCount = int(count);
+        if (localCount < 0) {
+            if (count.testAndSetOrdered(localCount, localCount -1))
+                return;
+        } else {
+            if (count.testAndSetOrdered(localCount, localCount + 1))
+                return;
+        }
+    }
+}
+
+int ThreadEngineBarrier::release()
+{
+    forever {
+        int localCount = int(count);
+        if (localCount == -1) {
+            if (count.testAndSetOrdered(-1, 0)) {
+                semaphore.release();
+                return 0;
+            }
+        } else if (localCount < 0) {
+            if (count.testAndSetOrdered(localCount, localCount + 1))
+                return qAbs(localCount + 1);
+        } else {
+            if (count.testAndSetOrdered(localCount, localCount - 1))
+                return localCount - 1;
+        }
+    }
+}
+
+// Wait until all threads have been released
+void ThreadEngineBarrier::wait()
+{
+    forever {
+        int localCount = int(count);
+        if (localCount == 0)
+            return;
+
+        Q_ASSERT(localCount > 0); // multiple waiters are not allowed.
+        if (count.testAndSetOrdered(localCount, -localCount)) {
+            semaphore.acquire();
+            return;
+        }
+    }
+}
+
+int ThreadEngineBarrier::currentCount()
+{
+    return int(count);
+}
+
+// releases a thread, unless this is the last thread.
+// returns true if the thread was released.
+bool ThreadEngineBarrier::releaseUnlessLast()
+{
+    forever {
+        int localCount = int(count);
+        if (qAbs(localCount) == 1) {
+            return false;
+        } else if (localCount < 0) {
+            if (count.testAndSetOrdered(localCount, localCount + 1))
+                return true;
+        } else {
+            if (count.testAndSetOrdered(localCount, localCount - 1))
+                return true;
+        }
+    }
+}
+
 ThreadEngineBase::ThreadEngineBase()
 :futureInterface(0), threadPool(QThreadPool::globalInstance())
 {
@@ -66,7 +141,7 @@ void ThreadEngineBase::startSingleThreaded()
 void ThreadEngineBase::startBlocking()
 {
     start();
-    semaphore.acquire();
+    barrier.acquire();
     startThreads();
 
     bool throttled = false;
@@ -88,10 +163,10 @@ void ThreadEngineBase::startBlocking()
 #endif
 
     if (throttled == false) {
-        semaphore.release();
+        barrier.release();
     }
 
-    semaphore.wait();
+    barrier.wait();
     finish();
     exceptionStore.throwPossibleException();
 }
@@ -101,6 +176,11 @@ void ThreadEngineBase::startThread()
     startThreadInternal();
 }
 
+void ThreadEngineBase::acquireBarrierSemaphore()
+{
+    barrier.acquire();
+}
+
 bool ThreadEngineBase::isCanceled()
 {
     if (futureInterface)
@@ -138,9 +218,9 @@ bool ThreadEngineBase::startThreadInternal()
     if (this->isCanceled())
         return false;
 
-    semaphore.acquire();
+    barrier.acquire();
     if (!threadPool->tryStart(this)) {
-        semaphore.release();
+        barrier.release();
         return false;
     }
     return true;
@@ -155,7 +235,7 @@ void ThreadEngineBase::startThreads()
 void ThreadEngineBase::threadExit()
 {
     const bool asynchronous = futureInterface != 0;
-    const int lastThread = (semaphore.release() == 0);
+    const int lastThread = (barrier.release() == 0);
 
     if (lastThread && asynchronous)
         this->asynchronousFinish();
@@ -166,7 +246,7 @@ void ThreadEngineBase::threadExit()
 // this function returns one.
 bool ThreadEngineBase::threadThrottleExit()
 {
-    return semaphore.releaseUnlessLast();
+    return barrier.releaseUnlessLast();
 }
 
 void ThreadEngineBase::run() // implements QRunnable.
diff --git a/src/corelib/concurrent/qtconcurrentthreadengine.h b/src/corelib/concurrent/qtconcurrentthreadengine.h
index 444e0db..1f359fc 100644
--- a/src/corelib/concurrent/qtconcurrentthreadengine.h
+++ b/src/corelib/concurrent/qtconcurrentthreadengine.h
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
@@ -51,7 +51,8 @@
 #include <QtCore/qdebug.h>
 #include <QtCore/qtconcurrentexception.h>
 #include <QtCore/qwaitcondition.h>
-#include <QtCore/qmutex.h>
+#include <QtCore/qatomic.h>
+#include <QtCore/qsemaphore.h>
 
 QT_BEGIN_HEADER
 QT_BEGIN_NAMESPACE
@@ -62,55 +63,29 @@ QT_MODULE(Core)
 
 namespace QtConcurrent {
 
-// A Semaphore that can wait until all resources are returned.
-class ThreadEngineSemaphore
+// The ThreadEngineBarrier counts worker threads, and allows one
+// thread to wait for all others to finish. Tested for its use in
+// QtConcurrent, requires more testing for use as a general class.
+class ThreadEngineBarrier
 {
-public:
-    ThreadEngineSemaphore()
-    :count(0) { }
-
-    void acquire()
-    {
-        QMutexLocker lock(&mutex);
-        ++count;
-    }
-
-    int release()
-    {
-        QMutexLocker lock(&mutex);
-        if (--count == 0)
-            waitCondition.wakeAll();
-        return count;
-    }
-
-    // Wait until all resources are released.
-    void wait()
-    {
-        QMutexLocker lock(&mutex);
-        if (count != 0)
-            waitCondition.wait(&mutex);
-    }
-
-    int currentCount()
-    {
-        return count;
-    }
-
-    // releases a resource, unless this is the last resource.
-    // returns true if a resource was released.
-    bool releaseUnlessLast()
-    {
-        QMutexLocker lock(&mutex);
-        if (count == 1)
-            return false;
-        --count;
-        return true;
-    }
-
 private:
+    // The thread count is maintained as an integer in the count atomic
+    // variable. The count can be either positive or negative - a negative
+    // count signals that a thread is waiting on the barrier.
+
+    // BC note: inlined code from Qt < 4.6 will expect to find the QMutex 
+    // and QAtomicInt here. ### Qt 5: remove.
     QMutex mutex;
-    int count;
-    QWaitCondition waitCondition;
+    QAtomicInt count;
+
+    QSemaphore semaphore;
+public:
+    ThreadEngineBarrier();
+    void acquire();
+    int release();
+    void wait();
+    int currentCount();
+    bool releaseUnlessLast();
 };
 
 enum ThreadFunctionResult { ThrottleThread, ThreadFinished };
@@ -133,6 +108,7 @@ public:
     bool isProgressReportingEnabled();
     void setProgressValue(int progress);
     void setProgressRange(int minimum, int maximum);
+    void acquireBarrierSemaphore();
 
 protected: // The user overrides these:
     virtual void start() {}
@@ -153,7 +129,7 @@ private:
 protected:
     QFutureInterfaceBase *futureInterface;
     QThreadPool *threadPool;
-    ThreadEngineSemaphore semaphore;
+    ThreadEngineBarrier barrier;
     QtConcurrent::internal::ExceptionStore exceptionStore;
 };
 
@@ -200,7 +176,7 @@ public:
         QFuture<T> future = QFuture<T>(futureInterfaceTyped());
         start();
 
-        semaphore.acquire();
+        acquireBarrierSemaphore();
         threadPool->start(this);
         return future;
     }
diff --git a/src/corelib/concurrent/qthreadpool.cpp b/src/corelib/concurrent/qthreadpool.cpp
index 8913b56..eea6331 100644
--- a/src/corelib/concurrent/qthreadpool.cpp
+++ b/src/corelib/concurrent/qthreadpool.cpp
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
@@ -222,6 +222,8 @@ void QThreadPoolPrivate::enqueueTask(QRunnable *runnable, int priority)
 
 int QThreadPoolPrivate::activeThreadCount() const
 {
+    // To improve scalability this function is called without holding 
+    // the mutex lock -- keep it thread-safe.
     return (allThreads.count()
             - expiredThreads.count()
             - waitingThreads
@@ -481,6 +483,12 @@ bool QThreadPool::tryStart(QRunnable *runnable)
         return false;
 
     Q_D(QThreadPool);
+
+    // To improve scalability perform a check on the thread count
+    // before locking the mutex.
+    if (d->allThreads.isEmpty() == false && d->activeThreadCount() >= d->maxThreadCount)
+        return false;
+
     QMutexLocker locker(&d->mutex);
     return d->tryStart(runnable);
 }
@@ -527,7 +535,6 @@ void QThreadPool::setExpiryTimeout(int expiryTimeout)
 int QThreadPool::maxThreadCount() const
 {
     Q_D(const QThreadPool);
-    QMutexLocker locker(&d->mutex);
     return d->maxThreadCount;
 }
 
@@ -556,7 +563,6 @@ void QThreadPool::setMaxThreadCount(int maxThreadCount)
 int QThreadPool::activeThreadCount() const
 {
     Q_D(const QThreadPool);
-    QMutexLocker locker(&d->mutex);
     return d->activeThreadCount();
 }
 
diff --git a/src/corelib/concurrent/qthreadpool.h b/src/corelib/concurrent/qthreadpool.h
index f3dd96c..0ddefd1 100644
--- a/src/corelib/concurrent/qthreadpool.h
+++ b/src/corelib/concurrent/qthreadpool.h
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
diff --git a/src/corelib/concurrent/qthreadpool_p.h b/src/corelib/concurrent/qthreadpool_p.h
index 6948ee1..fcd6577 100644
--- a/src/corelib/concurrent/qthreadpool_p.h
+++ b/src/corelib/concurrent/qthreadpool_p.h
@@ -1,7 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
@@ -34,7 +34,7 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** contact the sales department at http://www.qtsoftware.com/contact.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/