2 files changed, 19 insertions, 0 deletions
diff --git a/src/corelib/kernel/qproperty.cpp b/src/corelib/kernel/qproperty.cpp
index 0534749afa..686ec484ca 100644
--- a/src/corelib/kernel/qproperty.cpp
+++ b/src/corelib/kernel/qproperty.cpp
@@ -1667,4 +1667,19 @@ void restoreBindingStatus(BindingEvaluationState *status)
     bindingStatus.currentlyEvaluatingBinding = status;
 }
 
+namespace QtPrivate {
+/*!
+    \internal
+    This function can be used to detect whether we are currently
+    evaluating a binding. This can e.g. be used to defer the allocation
+    of extra data for a QPropertyBindingStorage in a getter.
+    Note that this function accesses TLS storage, and is therefore soemwhat
+    costly to call.
+ */
+bool isAnyBindingEvaluating()
+{
+    return bindingStatus.currentlyEvaluatingBinding != nullptr;
+}
+} // namespace QtPrivate end
+
 QT_END_NAMESPACE
diff --git a/src/corelib/kernel/qproperty_p.h b/src/corelib/kernel/qproperty_p.h
index 6ff1e8e71e..27cb8c907f 100644
--- a/src/corelib/kernel/qproperty_p.h
+++ b/src/corelib/kernel/qproperty_p.h
@@ -59,6 +59,10 @@
 
 QT_BEGIN_NAMESPACE
 
+namespace QtPrivate {
+    Q_CORE_EXPORT bool isAnyBindingEvaluating();
+}
+
 // Keep all classes related to QProperty in one compilation unit. Performance of this code is crucial and
 // we need to allow the compiler to inline where it makes sense.