7 files changed, 13 insertions, 13 deletions
diff --git a/src/corelib/thread/qexception.h b/src/corelib/thread/qexception.h
index 7fb798fdad..b15ae5095a 100644
--- a/src/corelib/thread/qexception.h
+++ b/src/corelib/thread/qexception.h
@@ -84,7 +84,7 @@ class Base;
 class Q_CORE_EXPORT ExceptionHolder
 {
 public:
-    ExceptionHolder(QException *exception = 0);
+    ExceptionHolder(QException *exception = Q_NULLPTR);
     ExceptionHolder(const ExceptionHolder &other);
     void operator=(const ExceptionHolder &other);
     ~ExceptionHolder();
diff --git a/src/corelib/thread/qfutureinterface.h b/src/corelib/thread/qfutureinterface.h
index 01eb043a5e..8c1f7e7d82 100644
--- a/src/corelib/thread/qfutureinterface.h
+++ b/src/corelib/thread/qfutureinterface.h
@@ -299,7 +299,7 @@ public:
 
     void reportResult(const void *, int) { }
     void reportResults(const QVector<void> &, int) { }
-    void reportFinished(const void * = 0) { QFutureInterfaceBase::reportFinished(); }
+    void reportFinished(const void * = Q_NULLPTR) { QFutureInterfaceBase::reportFinished(); }
 };
 
 QT_END_NAMESPACE
diff --git a/src/corelib/thread/qfuturewatcher.h b/src/corelib/thread/qfuturewatcher.h
index 63558d4a0f..42a22d9063 100644
--- a/src/corelib/thread/qfuturewatcher.h
+++ b/src/corelib/thread/qfuturewatcher.h
@@ -52,7 +52,7 @@ class Q_CORE_EXPORT QFutureWatcherBase : public QObject
     Q_DECLARE_PRIVATE(QFutureWatcherBase)
 
 public:
-    explicit QFutureWatcherBase(QObject *parent = 0);
+    explicit QFutureWatcherBase(QObject *parent = Q_NULLPTR);
     // de-inline dtor
 
     int progressValue() const;
@@ -179,7 +179,7 @@ template <>
 class QFutureWatcher<void> : public QFutureWatcherBase
 {
 public:
-    explicit QFutureWatcher(QObject *_parent = 0)
+    explicit QFutureWatcher(QObject *_parent = Q_NULLPTR)
         : QFutureWatcherBase(_parent)
     { }
     ~QFutureWatcher()
diff --git a/src/corelib/thread/qmutex.h b/src/corelib/thread/qmutex.h
index 63c488747f..0c5a73b4df 100644
--- a/src/corelib/thread/qmutex.h
+++ b/src/corelib/thread/qmutex.h
@@ -73,16 +73,16 @@ public:
 
 private:
     inline bool fastTryLock() Q_DECL_NOTHROW {
-        return d_ptr.testAndSetAcquire(0, dummyLocked());
+        return d_ptr.testAndSetAcquire(Q_NULLPTR, dummyLocked());
     }
     inline bool fastTryUnlock() Q_DECL_NOTHROW {
-        return d_ptr.testAndSetRelease(dummyLocked(), 0);
+        return d_ptr.testAndSetRelease(dummyLocked(), Q_NULLPTR);
     }
     inline bool fastTryLock(QMutexData *&current) Q_DECL_NOTHROW {
-        return d_ptr.testAndSetAcquire(0, dummyLocked(), current);
+        return d_ptr.testAndSetAcquire(Q_NULLPTR, dummyLocked(), current);
     }
     inline bool fastTryUnlock(QMutexData *&current) Q_DECL_NOTHROW {
-        return d_ptr.testAndSetRelease(dummyLocked(), 0, current);
+        return d_ptr.testAndSetRelease(dummyLocked(), Q_NULLPTR, current);
     }
 
     void lockInternal() QT_MUTEX_LOCK_NOEXCEPT;
diff --git a/src/corelib/thread/qresultstore.h b/src/corelib/thread/qresultstore.h
index fbcb8ad3cd..7ecaa231b2 100644
--- a/src/corelib/thread/qresultstore.h
+++ b/src/corelib/thread/qresultstore.h
@@ -61,8 +61,8 @@ class ResultItem
 public:
     ResultItem(const void *_result, int _count) : m_count(_count), result(_result) { } // contruct with vector of results
     ResultItem(const void *_result) : m_count(0), result(_result) { } // construct with result
-    ResultItem() : m_count(0), result(0) { }
-    bool isValid() const { return result != 0; }
+    ResultItem() : m_count(0), result(Q_NULLPTR) { }
+    bool isValid() const { return result != Q_NULLPTR; }
     bool isVector() const { return m_count != 0; }
     int count() const { return (m_count == 0) ?  1 : m_count; }
     int m_count;          // result is either a pointer to a result or to a vector of results,
diff --git a/src/corelib/thread/qthread.h b/src/corelib/thread/qthread.h
index bfc469583d..d333980bf4 100644
--- a/src/corelib/thread/qthread.h
+++ b/src/corelib/thread/qthread.h
@@ -55,7 +55,7 @@ public:
     static int idealThreadCount() Q_DECL_NOTHROW;
     static void yieldCurrentThread();
 
-    explicit QThread(QObject *parent = 0);
+    explicit QThread(QObject *parent = Q_NULLPTR);
     ~QThread();
 
     enum Priority {
@@ -116,7 +116,7 @@ protected:
     static void setTerminationEnabled(bool enabled = true);
 
 protected:
-    QThread(QThreadPrivate &dd, QObject *parent = 0);
+    QThread(QThreadPrivate &dd, QObject *parent = Q_NULLPTR);
 
 private:
     Q_DECLARE_PRIVATE(QThread)
diff --git a/src/corelib/thread/qthreadpool.h b/src/corelib/thread/qthreadpool.h
index b1ca808a99..95b41a0417 100644
--- a/src/corelib/thread/qthreadpool.h
+++ b/src/corelib/thread/qthreadpool.h
@@ -55,7 +55,7 @@ class Q_CORE_EXPORT QThreadPool : public QObject
     friend class QFutureInterfaceBase;
 
 public:
-    QThreadPool(QObject *parent = 0);
+    QThreadPool(QObject *parent = Q_NULLPTR);
     ~QThreadPool();
 
     static QThreadPool *globalInstance();