Add a constructor for QRunnable from anonymous functions

This makes it easier to create one without having to create
a derivative class. The patch also adds a path to avoid using
QRunnable directly in QThreadPool.

Change-Id: I9caa7dabb6f641b547d4771c863aa6ab7f01b704
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>

1 files changed, 27 insertions, 0 deletions

diff --git a/src/corelib/thread/qrunnable.cpp b/src/corelib/thread/qrunnable.cpp
index bd0a32b53d..58a764d407 100644
--- a/src/corelib/thread/qrunnable.cpp
+++ b/src/corelib/thread/qrunnable.cpp
@@ -114,4 +114,31 @@ QRunnable::~QRunnable()
     \sa autoDelete(), QThreadPool
 */
 
+class FunctionRunnable : public QRunnable
+{
+    std::function<void()> m_functor;
+public:
+    FunctionRunnable(std::function<void()> functor) : m_functor(std::move(functor))
+    {
+    }
+    void run() override
+    {
+        m_functor();
+    }
+};
+
+/*!
+    \since 5.15
+
+    Creates a QRunnable that calls \a fun in run().
+
+    Auto-deletion is enabled by default.
+
+    \sa run(), autoDelete()
+*/
+QRunnable *QRunnable::create(std::function<void()> fun)
+{
+    return new FunctionRunnable(std::move(fun));
+}
+
 QT_END_NAMESPACE