4 files changed, 17 insertions, 5 deletions
diff --git a/src/corelib/thread/qthread.cpp b/src/corelib/thread/qthread.cpp
index cdcb65c..2c63dfc 100644
--- a/src/corelib/thread/qthread.cpp
+++ b/src/corelib/thread/qthread.cpp
@@ -173,7 +173,7 @@ void QAdoptedThread::run()
 */
 
 QThreadPrivate::QThreadPrivate(QThreadData *d)
-    : QObjectPrivate(), running(false), finished(false), terminated(false),
+    : QObjectPrivate(), running(false), finished(false), terminated(false), exited(false), returnCode(-1),
       stackSize(0), priority(QThread::InheritPriority), data(d)
 {
 #if defined (Q_OS_UNIX)
@@ -480,11 +480,18 @@ uint QThread::stackSize() const
 int QThread::exec()
 {
     Q_D(QThread);
+    QMutexLocker locker(&d->mutex);
+    d->data->quitNow = false;
+    if (d->exited)
+        return d->returnCode;
+    locker.unlock();
+
     QEventLoop eventLoop;
     int returnCode = eventLoop.exec();
 
-    QMutexLocker locker(&d->mutex);
-    d->data->quitNow = false;
+    locker.relock();
+    d->exited = false;
+    d->returnCode = -1;
     return returnCode;
 }
 
@@ -511,6 +518,8 @@ void QThread::exit(int returnCode)
 {
     Q_D(QThread);
     QMutexLocker locker(&d->mutex);
+    d->exited = true;
+    d->returnCode = returnCode;
     d->data->quitNow = true;
     for (int i = 0; i < d->data->eventLoops.size(); ++i) {
         QEventLoop *eventLoop = d->data->eventLoops.at(i);
diff --git a/src/corelib/thread/qthread_p.h b/src/corelib/thread/qthread_p.h
index 44eb8f8..d816aef 100644
--- a/src/corelib/thread/qthread_p.h
+++ b/src/corelib/thread/qthread_p.h
@@ -127,6 +127,9 @@ public:
     bool finished;
     bool terminated;
 
+    bool exited;
+    int returnCode;
+
     uint stackSize;
     QThread::Priority priority;
 
diff --git a/src/corelib/thread/qthread_unix.cpp b/src/corelib/thread/qthread_unix.cpp
index bd31d9c..6b34b5f 100644
--- a/src/corelib/thread/qthread_unix.cpp
+++ b/src/corelib/thread/qthread_unix.cpp
@@ -253,6 +253,7 @@ void *QThreadPrivate::start(void *arg)
     pthread_setspecific(current_thread_data_key, data);
 
     data->ref();
+    data->quitNow = false;
 
     // ### TODO: allow the user to create a custom event dispatcher
     createEventDispatcher(data);
@@ -494,7 +495,6 @@ void QThread::start(Priority priority)
     d->running = true;
     d->finished = false;
     d->terminated = false;
-    d->data->quitNow = false;
 
     pthread_attr_t attr;
     pthread_attr_init(&attr);
diff --git a/src/corelib/thread/qthread_win.cpp b/src/corelib/thread/qthread_win.cpp
index 9826dcb..37d5b87 100644
--- a/src/corelib/thread/qthread_win.cpp
+++ b/src/corelib/thread/qthread_win.cpp
@@ -298,6 +298,7 @@ unsigned int __stdcall QThreadPrivate::start(void *arg)
 
     QThread::setTerminationEnabled(false);
 
+    data->quitNow = false;
     // ### TODO: allow the user to create a custom event dispatcher
     createEventDispatcher(data);
 
@@ -404,7 +405,6 @@ void QThread::start(Priority priority)
     d->running = true;
     d->finished = false;
     d->terminated = false;
-    d->data->quitNow = false;
 
     /*
       NOTE: we create the thread in the suspended state, set the