Merge remote branch 'gerrit/master' into refactor

Conflicts:
	src/gui/kernel/qapplication_x11.cpp
	src/gui/widgets/qlinecontrol.cpp
	src/gui/widgets/qlinecontrol_p.h
	src/gui/widgets/qtabwidget.h

Change-Id: I90ba893a5553b9ff5658ca0a3221ecf76be4c736

1 files changed, 9 insertions, 23 deletions

diff --git a/src/corelib/kernel/qobject.cpp b/src/corelib/kernel/qobject.cpp
index a282ae007c..7652ec4871 100644
--- a/src/corelib/kernel/qobject.cpp
+++ b/src/corelib/kernel/qobject.cpp
@@ -60,7 +60,6 @@
 #include <qsharedpointer.h>
 
 #include <private/qorderedmutexlocker_p.h>
-#include <private/qmutexpool_p.h>
 
 #include <new>
 
@@ -95,35 +94,22 @@ static int *queuedConnectionTypes(const QList<QByteArray> &typeNames)
     return types;
 }
 
-static QBasicAtomicPointer<QMutexPool> signalSlotMutexes = Q_BASIC_ATOMIC_INITIALIZER(0);
-static QBasicAtomicInt objectCount = Q_BASIC_ATOMIC_INITIALIZER(0);
+static QBasicMutex _q_ObjectMutexPool[131];
 
 /** \internal
  * mutex to be locked when accessing the connectionlists or the senders list
  */
 static inline QMutex *signalSlotLock(const QObject *o)
 {
-    if (!signalSlotMutexes) {
-        QMutexPool *mp = new QMutexPool;
-        if (!signalSlotMutexes.testAndSetOrdered(0, mp)) {
-            delete mp;
-        }
-    }
-    return signalSlotMutexes->get(o);
+    return static_cast<QMutex *>(&_q_ObjectMutexPool[
+        uint(quintptr(o)) % sizeof(_q_ObjectMutexPool)/sizeof(QBasicMutex)]);
 }
 
 extern "C" Q_CORE_EXPORT void qt_addObject(QObject *)
-{
-    objectCount.ref();
-}
+{}
 
 extern "C" Q_CORE_EXPORT void qt_removeObject(QObject *)
-{
-    if(!objectCount.deref()) {
-        QMutexPool *old = signalSlotMutexes.fetchAndStoreAcquire(0);
-        delete old;
-    }
-}
+{}
 
 struct QConnectionSenderSwitcher {
     QObject *receiver;
@@ -879,7 +865,7 @@ QObject::~QObject()
                         if (c->next) c->next->prev = c->prev;
                     }
                     if (needToUnlock)
-                        m->unlockInline();
+                        m->unlock();
 
                     connectionList.first = c->nextConnectionList;
                     delete c;
@@ -903,7 +889,7 @@ QObject::~QObject()
             bool needToUnlock = QOrderedMutexLocker::relock(signalSlotMutex, m);
             //the node has maybe been removed while the mutex was unlocked in relock?
             if (!node || node->sender != sender) {
-                m->unlockInline();
+                m->unlock();
                 continue;
             }
             node->receiver = 0;
@@ -913,7 +899,7 @@ QObject::~QObject()
 
             node = node->next;
             if (needToUnlock)
-                m->unlockInline();
+                m->unlock();
         }
     }
 
@@ -3077,7 +3063,7 @@ bool QMetaObjectPrivate::disconnectHelper(QObjectPrivate::Connection *c,
             }
 
             if (needToUnlock)
-                receiverMutex->unlockInline();
+                receiverMutex->unlock();
 
             c->receiver = 0;