Get rid of unsharable containers

The support for unsharable containers has been deprecated
since Qt 5.3.0, so let's finally remove support for them.

Change-Id: I9be31f55208ae4750e8020b10b6e4ad7e8fb3e0e
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 0 insertions, 25 deletions

diff --git a/src/corelib/tools/qrefcount.h b/src/corelib/tools/qrefcount.h
index 2e5388ad9a..982a9c2bbf 100644
--- a/src/corelib/tools/qrefcount.h
+++ b/src/corelib/tools/qrefcount.h
@@ -53,10 +53,6 @@ class RefCount
 public:
     inline bool ref() noexcept {
         int count = atomic.loadRelaxed();
-#if !defined(QT_NO_UNSHARABLE_CONTAINERS)
-        if (count == 0) // !isSharable
-            return false;
-#endif
         if (count != -1) // !isStatic
             atomic.ref();
         return true;
@@ -64,32 +60,11 @@ public:
 
     inline bool deref() noexcept {
         int count = atomic.loadRelaxed();
-#if !defined(QT_NO_UNSHARABLE_CONTAINERS)
-        if (count == 0) // !isSharable
-            return false;
-#endif
         if (count == -1) // isStatic
             return true;
         return atomic.deref();
     }
 
-#if !defined(QT_NO_UNSHARABLE_CONTAINERS)
-    bool setSharable(bool sharable) noexcept
-    {
-        Q_ASSERT(!isShared());
-        if (sharable)
-            return atomic.testAndSetRelaxed(0, 1);
-        else
-            return atomic.testAndSetRelaxed(1, 0);
-    }
-
-    bool isSharable() const noexcept
-    {
-        // Sharable === Shared ownership.
-        return atomic.loadRelaxed() != 0;
-    }
-#endif
-
     bool isStatic() const noexcept
     {
         // Persistent object, never deleted