QEventLoopLocker: rewrite to hold public classes

... instead of Private ones, at the cost of having to befriend of all
the lockable classes, because we need access to their d_func()'s.

This simplifies the code, because we don't need the manual QClass to
QClassPrivate mapping (o2p) anymore, we can just use d_func(). This also
paves the way to make QEventLoopLocker almost completely inline and use
a 3-pointer form of QBiPointer, once available, to hide the bit
fiddling. We couldn't make such a change if the class continued to hold
pointers to QClassPrivate's.

Pick-to: 6.6
Task-number: QTBUG-114793
Change-Id: Id300e4d45d6cacabe090a46cd6433c5ead3c8b0c
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/corelib/kernel/qcoreapplication.h b/src/corelib/kernel/qcoreapplication.h
index 5a7dc46a3f..eb34c9aa9b 100644
--- a/src/corelib/kernel/qcoreapplication.h
+++ b/src/corelib/kernel/qcoreapplication.h
@@ -33,6 +33,7 @@ class QTranslator;
 class QPostEventList;
 class QAbstractEventDispatcher;
 class QAbstractNativeEventFilter;
+class QEventLoopLocker;
 
 #if QT_CONFIG(permissions) || defined(Q_QDOC)
 class QPermission;
@@ -59,6 +60,7 @@ class Q_CORE_EXPORT QCoreApplication
 #endif
 
     Q_DECLARE_PRIVATE(QCoreApplication)
+    friend class QEventLoopLocker;
 public:
     enum { ApplicationFlags = QT_VERSION
     };