QEventLoopLocker: add move SMFs and swap()

[ChangeLog][QEventLoopLocker] Added move special-member-functions and
swap().

Fixes: QTBUG-115011
Change-Id: I81a31133adafa31904e8b7c49015506db8c161c6
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/corelib/kernel/qeventloop.cpp

@@ -383,6 +383,43 @@ QEventLoopLocker::QEventLoopLocker(QThread *thread) noexcept
 
 }
 
+/*!
+    \fn QEventLoopLocker::QEventLoopLocker(QEventLoopLocker &&other)
+    \since 6.7
+
+    Move-constructs an event-loop locker from \a other. \a other will have a
+    no-op destructor, while responsibility for preventing the
+    QEventLoop/QThread/QCoreApplication from quitting is transferred to the new
+    object.
+*/
+
+/*!
+    \fn QEventLoopLocker &QEventLoopLocker::operator=(QEventLoopLocker &&other)
+    \since 6.7
+
+    Move-assigns this event-loop locker from \a other. \a other will have a
+    no-op destructor, while responsibility for preventing the
+    QEventLoop/QThread/QCoreApplication from quitting is transferred to this
+    object.
+*/
+
+/*!
+    \fn QEventLoopLocker::swap(QEventLoopLocker &other)
+    \since 6.7
+
+    Swaps the object and the state of this QEventLoopLocker with \a other.
+    This operation is very fast and never fails.
+*/
+
+/*!
+    \fn QEventLoopLocker::swap(QEventLoopLocker &lhs, QEventLoopLocker &rhs)
+    \relates QEventLoopLocker
+    \since 6.7
+
+    Swaps the object and the state of \a lhs with \a rhs.
+    This operation is very fast and never fails.
+*/
+
 /*!
     Destroys this event loop locker object
  */

src/corelib/kernel/qeventloop.h

@@ -61,6 +61,14 @@ public:
     Q_NODISCARD_CTOR Q_CORE_EXPORT explicit QEventLoopLocker(QThread *thread) noexcept;
     Q_CORE_EXPORT ~QEventLoopLocker();
 
+    Q_NODISCARD_CTOR QEventLoopLocker(QEventLoopLocker &&other) noexcept
+        : p{std::exchange(other.p, 0)} {}
+    QEventLoopLocker &operator=(QEventLoopLocker &&other) noexcept
+    { auto moved = std::move(other); swap(moved); return *this; }
+
+    void swap(QEventLoopLocker &other) noexcept { std::swap(p, other.p); }
+    friend void swap(QEventLoopLocker &lhs, QEventLoopLocker &rhs) noexcept { lhs.swap(rhs); }
+
 private:
     Q_DISABLE_COPY(QEventLoopLocker)
     friend class QEventLoopLockerPrivate;