[dali_2.3.32] Merge branch 'devel/master'

[platform/core/uifw/dali-core.git] / dali / public-api / signals / functor-delegate.cpp

diff --git a/dali/public-api/signals/functor-delegate.cpp b/dali/public-api/signals/functor-delegate.cpp
index 8536985..fa7772f 100644 (file)
--- a/dali/public-api/signals/functor-delegate.cpp
+++ b/dali/public-api/signals/functor-delegate.cpp
@@ -1,46 +1,60 @@
-//
-// Copyright (c) 2014 Samsung Electronics Co., Ltd.
-//
-// Licensed under the Flora License, Version 1.0 (the License);
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://floralicense.org/license/
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an AS IS BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
+/*
+ * Copyright (c) 2020 Samsung Electronics Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
 
 // CLASS HEADER
 #include <dali/public-api/signals/functor-delegate.h>
 
+// EXTERNAL INCLUDES
+#include <type_traits>
+
 namespace Dali
 {
+namespace
+{
+/**
+ * our implementation currently relies on C function pointer to be the size of void*
+ * in FunctorDispatcher we pass the C function as void* as the code is common between member
+ * functions and regular functions.
+ * If this assert fails, please implement the template specialisation for C functions.
+ */
+static_assert(sizeof(void*) == sizeof(&FunctorDispatcher<void>::Dispatch), "Need to implement template specialisation for C functions");
+} // namespace
 
 FunctorDelegate::~FunctorDelegate()
 {
-  if( mObjectPointer )
+  if(mFunctorPointer)
   {
-    (*mDestructorDispatcher)( mObjectPointer );
+    (*mDestructorDispatcher)(mFunctorPointer);
   }
 }
 
 void FunctorDelegate::Execute()
 {
-  if( mObjectPointer )
+  if(mFunctorPointer)
   {
     Dispatcher dispatcher = mMemberFunctionDispatcher;
-    (*dispatcher)( mObjectPointer );
+    (*dispatcher)(mFunctorPointer);
   }
 }
 
-FunctorDelegate::FunctorDelegate( void* objectPtr, Dispatcher dispatcher, Destructor destructor )
-: mObjectPointer( objectPtr ),
-  mMemberFunctionDispatcher( dispatcher ),
-  mDestructorDispatcher( destructor )
+FunctorDelegate::FunctorDelegate(void* objectPtr, Dispatcher dispatcher, Destructor destructor)
+: mFunctorPointer(objectPtr),
+  mMemberFunctionDispatcher(dispatcher),
+  mDestructorDispatcher(destructor)
 {
 }