From: Igor Nazarov <i.nazarov@samsung.com>
Date: Wed, 19 Apr 2017 13:35:39 +0000 (+0300)
Subject: TizenRefApp-8409 [Gallery] Improve RefCountAware class functionality
X-Git-Tag: submit/tizen/20170531.142232~26
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=50debe4284dbd98fd727a22e0decac753efcf0a4;p=profile%2Fwearable%2Fapps%2Fnative%2Fgallery.git

TizenRefApp-8409 [Gallery] Improve RefCountAware class functionality

- RefCountAware class functionality rewritten in order to allow more use
  cases.

Change-Id: I08588caf4ebf83d2d330be7e6c0100318934e5a1
---

diff --git a/ucl/inc/ucl/misc/RefCountAware.h b/ucl/inc/ucl/misc/RefCountAware.h
index f037baa..7ec13cc 100644
--- a/ucl/inc/ucl/misc/RefCountAware.h
+++ b/ucl/inc/ucl/misc/RefCountAware.h
@@ -26,33 +26,13 @@ namespace ucl {
 
 	class RefCountAware : public Polymorphic {
 	public:
-		template <class T>
-		static SharedRef<T> asShared(T *obj);
-		template <class T>
-		static WeakRef<T> asWeak(T *obj);
-
-		template <class T>
-		static SharedRef<T> asShared(T &obj);
-		template <class T>
-		static WeakRef<T> asWeak(T &obj);
-
 		bool isShared() const;
 
 		template <class T>
-		SharedRef<T> asShared();
-		template <class T>
-		WeakRef<T> asWeak();
+		SharedRef<T> asSharedThis(T *thisAlias) const;
 
 		template <class T>
-		SharedRef<const T> asShared() const;
-		template <class T>
-		WeakRef<const T> asWeak() const;
-
-		RefCountAwareSRef asShared();
-		RefCountAwareWRef asWeak();
-
-		RefCountAwareSCRef asShared() const;
-		RefCountAwareWCRef asWeak() const;
+		WeakRef<T> asWeakThis(T *thisAlias) const;
 
 	protected:
 		RefCountAware(RefCountObjBase *rc);
@@ -65,14 +45,42 @@ namespace ucl {
 	// Non-member functions //
 
 	template <class T>
-	SharedRef<T> asShared(T *obj);
+	SharedRef<T> asShared(T &obj);
 	template <class T>
-	WeakRef<T> asWeak(T *obj);
+	SharedRef<T> asShared(T *obj);
 
-	template <class T>
-	SharedRef<T> asShared(T &obj);
 	template <class T>
 	WeakRef<T> asWeak(T &obj);
+	template <class T>
+	WeakRef<T> asWeak(T *obj);
+
+	template <class T, class U, class = typename
+			std::enable_if<!std::is_same<T, U>::value>::type>
+	SharedRef<T> asShared(U &obj);
+	template <class T, class U, class = typename
+			std::enable_if<!std::is_same<T, U>::value>::type>
+	SharedRef<T> asShared(U *obj);
+
+	template <class T, class U, class = typename
+			std::enable_if<!std::is_same<T, U>::value>::type>
+	WeakRef<T> asWeak(U &obj);
+	template <class T, class U, class = typename
+			std::enable_if<!std::is_same<T, U>::value>::type>
+	WeakRef<T> asWeak(U *obj);
+
+	template <class T, class U, class = typename
+			std::enable_if<!std::is_same<T, const U>::value>::type>
+	SharedRef<const T> asShared(const U &obj);
+	template <class T, class U, class = typename
+			std::enable_if<!std::is_same<T, const U>::value>::type>
+	SharedRef<const T> asShared(const U *obj);
+
+	template <class T, class U, class = typename
+			std::enable_if<!std::is_same<T, const U>::value>::type>
+	WeakRef<const T> asWeak(const U &obj);
+	template <class T, class U, class = typename
+			std::enable_if<!std::is_same<T, const U>::value>::type>
+	WeakRef<const T> asWeak(const U *obj);
 }
 
 #include "RefCountAware.hpp"
diff --git a/ucl/inc/ucl/misc/RefCountAware.hpp b/ucl/inc/ucl/misc/RefCountAware.hpp
index 7969289..ae51c0d 100644
--- a/ucl/inc/ucl/misc/RefCountAware.hpp
+++ b/ucl/inc/ucl/misc/RefCountAware.hpp
@@ -23,118 +23,108 @@ namespace ucl {
 	{
 	}
 
-	template <class T>
-	inline SharedRef<T> RefCountAware::asShared(T *obj)
-	{
-		return (obj ? asShared(*obj) : SharedRef<T>());
-	}
-
-	template <class T>
-	inline WeakRef<T> RefCountAware::asWeak(T *obj)
-	{
-		return (obj ? asWeak(*obj) : WeakRef<T>());
-	}
-
-	template <class T>
-	inline SharedRef<T> RefCountAware::asShared(T &obj)
-	{
-		return obj.template asShared<typename std::remove_cv<T>::type>();
-	}
-
-	template <class T>
-	inline WeakRef<T> RefCountAware::asWeak(T &obj)
-	{
-		return obj.template asWeak<typename std::remove_cv<T>::type>();
-	}
-
 	inline bool RefCountAware::isShared() const
 	{
 		return !!m_rc;
 	}
 
 	template <class T>
-	inline SharedRef<T> RefCountAware::asShared()
+	inline SharedRef<T> RefCountAware::asSharedThis(T *const thisAlias) const
 	{
 		if (!isShared()) {
 			UCL_ELOG("NOT SHARED: %s", typeid(*this).name());
 			return {};
 		}
-		return {m_rc, static_cast<T *>(this)};
+		return {m_rc, thisAlias};
 	}
 
 	template <class T>
-	inline WeakRef<T> RefCountAware::asWeak()
+	inline WeakRef<T> RefCountAware::asWeakThis(T *const thisAlias) const
 	{
 		if (!isShared()) {
 			UCL_ELOG("NOT SHARED: %s", typeid(*this).name());
 			return {};
 		}
-		return {m_rc, static_cast<T *>(this)};
+		return {m_rc, thisAlias};
 	}
 
+	// Non-member functions //
+
 	template <class T>
-	inline SharedRef<const T> RefCountAware::asShared() const
+	inline SharedRef<T> asShared(T &obj)
 	{
-		if (!isShared()) {
-			UCL_ELOG("NOT SHARED: %s", typeid(*this).name());
-			return {};
-		}
-		return {m_rc, static_cast<const T *>(this)};
+		return obj.template asSharedThis<T>(&obj);
 	}
 
 	template <class T>
-	inline WeakRef<const T> RefCountAware::asWeak() const
+	inline SharedRef<T> asShared(T *obj)
 	{
-		if (!isShared()) {
-			UCL_ELOG("NOT SHARED: %s", typeid(*this).name());
-			return {};
-		}
-		return {m_rc, static_cast<const T *>(this)};
+		if (!obj) return {};
+		return obj->template asSharedThis<T>(obj);
 	}
 
-	inline RefCountAwareSRef RefCountAware::asShared()
+	template <class T>
+	inline WeakRef<T> asWeak(T &obj)
 	{
-		return asShared<RefCountAware>();
+		return obj.template asWeakThis<T>(&obj);
 	}
 
-	inline RefCountAwareWRef RefCountAware::asWeak()
+	template <class T>
+	inline WeakRef<T> asWeak(T *obj)
 	{
-		return asWeak<RefCountAware>();
+		if (!obj) return {};
+		return obj->template asWeakThis<T>(obj);
 	}
 
-	inline RefCountAwareSCRef RefCountAware::asShared() const
+	template <class T, class U, class>
+	inline SharedRef<T> asShared(U &obj)
 	{
-		return asShared<RefCountAware>();
+		return obj.template asSharedThis<T>(&obj);
 	}
 
-	inline RefCountAwareWCRef RefCountAware::asWeak() const
+	template <class T, class U, class>
+	inline SharedRef<T> asShared(U *obj)
 	{
-		return asWeak<RefCountAware>();
+		if (!obj) return {};
+		return obj->template asSharedThis<T>(obj);
 	}
 
-	// Non-member functions //
+	template <class T, class U, class>
+	inline WeakRef<T> asWeak(U &obj)
+	{
+		return obj.template asWeakThis<T>(&obj);
+	}
 
-	template <class T>
-	inline SharedRef<T> asShared(T *obj)
+	template <class T, class U, class>
+	inline WeakRef<T> asWeak(U *obj)
 	{
-		return RefCountAware::asShared(obj);
+		if (!obj) return {};
+		return obj->template asWeakThis<T>(obj);
 	}
 
-	template <class T>
-	inline WeakRef<T> asWeak(T *obj)
+	template <class T, class U, class>
+	inline SharedRef<const T> asShared(const U &obj)
 	{
-		return RefCountAware::asWeak(obj);
+		return obj.template asSharedThis<const T>(&obj);
 	}
 
-	template <class T>
-	inline SharedRef<T> asShared(T &obj)
+	template <class T, class U, class>
+	inline SharedRef<const T> asShared(const U *obj)
 	{
-		return RefCountAware::asShared(obj);
+		if (!obj) return {};
+		return obj->template asSharedThis<const T>(obj);
 	}
 
-	template <class T>
-	inline WeakRef<T> asWeak(T &obj)
+	template <class T, class U, class>
+	inline WeakRef<const T> asWeak(const U &obj)
+	{
+		return obj.template asWeakThis<const T>(&obj);
+	}
+
+	template <class T, class U, class>
+	inline WeakRef<const T> asWeak(const U *obj)
 	{
-		return RefCountAware::asWeak(obj);
+		if (!obj) return {};
+		return obj->template asWeakThis<const T>(obj);
 	}
 }