From caee2d3e8f66b1ac31df993eab92828f39392402 Mon Sep 17 00:00:00 2001
From: "l.bermes@asctechnologies.com" <l.bermes@asctechnologies.com>
Date: Mon, 28 Oct 2024 16:16:26 +0100
Subject: [PATCH] Extended QSharedPointer and QWeakPointer with isShared and
 needsDetach

This like it is used in QArrayDataPointer and allows to evaluate if cloing of an object is needed when it needs to be changed without affecting other references
---
 src/corelib/tools/qsharedpointer_impl.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/corelib/tools/qsharedpointer_impl.h b/src/corelib/tools/qsharedpointer_impl.h
index ceb4553b635..d3f757148d7 100644
--- a/src/corelib/tools/qsharedpointer_impl.h
+++ b/src/corelib/tools/qsharedpointer_impl.h
@@ -114,6 +114,14 @@ namespace QtSharedPointer {
 
         void destroy() { destroyer(this); }
 
+        bool isShared() const noexcept {
+            return strongref.loadRelaxed() != 1;
+        }
+
+        bool needsDetach() const noexcept {
+            return strongref.loadRelaxed() > 1;
+        }
+
 #ifndef QT_NO_QOBJECT
         Q_CORE_EXPORT static ExternalRefCountData *getAndRef(const QObject *);
         QT6_ONLY(
@@ -463,6 +471,11 @@ template <class T> class QSharedPointer
     size_t owner_hash() const noexcept
     { return std::hash<Data *>()(d); }
 
+    bool isShared() const noexcept
+    { return !d || d->isShared(); }
+    bool needsDetach() const noexcept
+    { return !d || d->needsDetach(); }
+
 private:
     Q_NODISCARD_CTOR
     explicit QSharedPointer(Qt::Initialization) {}
@@ -717,6 +730,11 @@ class QWeakPointer
     size_t owner_hash() const noexcept
     { return std::hash<Data *>()(d); }
 
+    bool isShared() const noexcept
+    { return !d || d->isShared(); }
+    bool needsDetach() const noexcept
+    { return !d || d->needsDetach(); }
+
 private:
     friend struct QtPrivate::EnableInternalData;
     template <class X> friend class QSharedPointer;