Merge remote-tracking branch 'origin/5.5' into 5.6

Change-Id: I7831f560165fa08882ae54efeaea1f0146c3358c

2 files changed, 9 insertions, 4 deletions

diff --git a/src/corelib/thread/qfutureinterface.cpp b/src/corelib/thread/qfutureinterface.cpp
index 05c4371a58..60155c96fd 100644
--- a/src/corelib/thread/qfutureinterface.cpp
+++ b/src/corelib/thread/qfutureinterface.cpp
@@ -193,16 +193,19 @@ void QFutureInterfaceBase::waitForResume()
 
 int QFutureInterfaceBase::progressValue() const
 {
+    const QMutexLocker lock(&d->m_mutex);
     return d->m_progressValue;
 }
 
 int QFutureInterfaceBase::progressMinimum() const
 {
+    const QMutexLocker lock(&d->m_mutex);
     return d->m_progressMinimum;
 }
 
 int QFutureInterfaceBase::progressMaximum() const
 {
+    const QMutexLocker lock(&d->m_mutex);
     return d->m_progressMaximum;
 }
 
diff --git a/src/corelib/thread/qfutureinterface_p.h b/src/corelib/thread/qfutureinterface_p.h
index 2321ce8d72..e2d588cd07 100644
--- a/src/corelib/thread/qfutureinterface_p.h
+++ b/src/corelib/thread/qfutureinterface_p.h
@@ -146,18 +146,20 @@ public:
         QAtomicInt m_refCountT;
     };
 
+    // T: accessed from executing thread
+    // Q: accessed from the waiting/querying thread
     RefCount refCount;
     mutable QMutex m_mutex;
     QWaitCondition waitCondition;
     QList<QFutureCallOutInterface *> outputConnections;
-    int m_progressValue;
-    int m_progressMinimum;
-    int m_progressMaximum;
+    int m_progressValue; // TQ
+    int m_progressMinimum; // TQ
+    int m_progressMaximum; // TQ
     QFutureInterfaceBase::State state;
     QElapsedTimer progressTime;
     QWaitCondition pausedWaitCondition;
     QtPrivate::ResultStoreBase m_results;
-    bool manualProgress;
+    bool manualProgress; // only accessed from executing thread
     int m_expectedResultCount;
     QtPrivate::ExceptionStore m_exceptionStore;
     QString m_progressText;