CoreLib: use const (and const APIs) more

For CoW types const methods will be called.

Mark store_persistent_indexes() as const,
because this method does not modify the object.

Change-Id: Ic867913b4fb5aaebfbaaffe1d3be45cf7b646403
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

3 files changed, 3 insertions, 3 deletions

diff --git a/src/corelib/thread/qthread_p.h b/src/corelib/thread/qthread_p.h
index 5f7d01f50f..adcd98b609 100644
--- a/src/corelib/thread/qthread_p.h
+++ b/src/corelib/thread/qthread_p.h
@@ -121,7 +121,7 @@ public:
     void addEvent(const QPostEvent &ev) {
         int priority = ev.priority;
         if (isEmpty() ||
-            last().priority >= priority ||
+            constLast().priority >= priority ||
             insertionOffset >= size()) {
             // optimization: we can simply append if the last event in
             // the queue has higher or equal priority
diff --git a/src/corelib/thread/qthreadpool.cpp b/src/corelib/thread/qthreadpool.cpp
index 9230854600..7ce757064f 100644
--- a/src/corelib/thread/qthreadpool.cpp
+++ b/src/corelib/thread/qthreadpool.cpp
@@ -228,7 +228,7 @@ int QThreadPoolPrivate::activeThreadCount() const
 void QThreadPoolPrivate::tryToStartMoreThreads()
 {
     // try to push tasks on the queue to any available threads
-    while (!queue.isEmpty() && tryStart(queue.first().first))
+    while (!queue.isEmpty() && tryStart(queue.constFirst().first))
         queue.removeFirst();
 }
 
diff --git a/src/corelib/thread/qwaitcondition_win.cpp b/src/corelib/thread/qwaitcondition_win.cpp
index f3a645c504..a95ca0b8fd 100644
--- a/src/corelib/thread/qwaitcondition_win.cpp
+++ b/src/corelib/thread/qwaitcondition_win.cpp
@@ -141,7 +141,7 @@ void QWaitConditionPrivate::post(QWaitConditionEvent *wce, bool ret)
 
     // wakeups delivered after the timeout should be forwarded to the next waiter
     if (!ret && wce->wokenUp && !queue.isEmpty()) {
-        QWaitConditionEvent *other = queue.first();
+        QWaitConditionEvent *other = queue.constFirst();
         SetEvent(other->event);
         other->wokenUp = true;
     }