diff options
-rw-r--r-- | include/armnn/utility/PolymorphicDowncast.hpp | 58 | ||||
-rw-r--r-- | src/armnn/test/UtilityTests.cpp | 75 |
2 files changed, 132 insertions, 1 deletions
diff --git a/include/armnn/utility/PolymorphicDowncast.hpp b/include/armnn/utility/PolymorphicDowncast.hpp index b4a5cad314..8f052370e5 100644 --- a/include/armnn/utility/PolymorphicDowncast.hpp +++ b/include/armnn/utility/PolymorphicDowncast.hpp @@ -9,6 +9,7 @@ #include <armnn/Exceptions.hpp> +#include <memory> #include <type_traits> namespace armnn @@ -29,6 +30,46 @@ namespace armnn #endif +namespace utility +{ +// static_pointer_cast overload for std::shared_ptr +template <class T1, class T2> +std::shared_ptr<T1> StaticPointerCast (const std::shared_ptr<T2>& sp) +{ + return std::static_pointer_cast<T1>(sp); +} + +// dynamic_pointer_cast overload for std::shared_ptr +template <class T1, class T2> +std::shared_ptr<T1> DynamicPointerCast (const std::shared_ptr<T2>& sp) +{ + return std::dynamic_pointer_cast<T1>(sp); +} + +// static_pointer_cast overload for raw pointers +template<class T1, class T2> +inline T1* StaticPointerCast(T2 *ptr) +{ + return static_cast<T1*>(ptr); +} + +// dynamic_pointer_cast overload for raw pointers +template<class T1, class T2> +inline T1* DynamicPointerCast(T2 *ptr) +{ + return dynamic_cast<T1*>(ptr); +} + +} // namespace utility + +/// Polymorphic downcast for build in pointers only +/// +/// Usage: Child* pChild = PolymorphicDowncast<Child*>(pBase); +/// +/// \tparam DestType Pointer type to the target object (Child pointer type) +/// \tparam SourceType Pointer type to the source object (Base pointer type) +/// \param value Pointer to the source object +/// \return Pointer of type DestType (Pointer of type child) template<typename DestType, typename SourceType> DestType PolymorphicDowncast(SourceType value) { @@ -40,4 +81,21 @@ DestType PolymorphicDowncast(SourceType value) return static_cast<DestType>(value); } + +/// Polymorphic downcast for shared pointers and build in pointers +/// +/// Usage: auto pChild = PolymorphicPointerDowncast<Child>(pBase) +/// +/// \tparam DestType Type of the target object (Child type) +/// \tparam SourceType Pointer type to the source object (Base (shared) pointer type) +/// \param value Pointer to the source object +/// \return Pointer of type DestType ((Shared) pointer of type child) +template<typename DestType, typename SourceType> +auto PolymorphicPointerDowncast(const SourceType& value) +{ + ARMNN_POLYMORPHIC_CAST_CHECK(utility::DynamicPointerCast<DestType>(value) + == utility::StaticPointerCast<DestType>(value)); + return utility::StaticPointerCast<DestType>(value); +} + } //namespace armnn
\ No newline at end of file diff --git a/src/armnn/test/UtilityTests.cpp b/src/armnn/test/UtilityTests.cpp index d5779c1a76..af56364b15 100644 --- a/src/armnn/test/UtilityTests.cpp +++ b/src/armnn/test/UtilityTests.cpp @@ -5,7 +5,6 @@ #include <boost/test/unit_test.hpp> #include <boost/core/lightweight_test.hpp> -#include <boost/polymorphic_cast.hpp> #define ARMNN_POLYMORPHIC_CAST_TESTABLE #define ARMNN_NUMERIC_CAST_TESTABLE @@ -56,6 +55,80 @@ BOOST_AUTO_TEST_CASE(PolymorphicDowncast) } +BOOST_AUTO_TEST_CASE(PolymorphicPointerDowncast_SharedPointer) +{ + using namespace armnn; + class Base + { + public: + virtual ~Base(){} + float v; + }; + + class Child1 : public Base + { + public: + int j; + }; + + class Child2 : public Base + { + public: + char b; + }; + + std::shared_ptr<Base> base1 = std::make_shared<Child1>(); + + std::shared_ptr<Child1> ptr1 = std::static_pointer_cast<Child1>(base1); + BOOST_CHECK(ptr1); + BOOST_CHECK_NO_THROW(armnn::PolymorphicPointerDowncast<Child1>(base1)); + BOOST_CHECK(armnn::PolymorphicPointerDowncast<Child1>(base1) == ptr1); + + auto ptr2 = std::dynamic_pointer_cast<Child2>(base1); + BOOST_CHECK(!ptr2); + BOOST_CHECK_THROW(armnn::PolymorphicPointerDowncast<Child2>(base1), std::bad_cast); + + armnn::IgnoreUnused(ptr1, ptr2); +} + + +BOOST_AUTO_TEST_CASE(PolymorphicPointerDowncast_BuildInPointer) +{ + using namespace armnn; + class Base + { + public: + virtual ~Base(){} + float v; + }; + + class Child1 : public Base + { + public: + int j; + }; + + class Child2 : public Base + { + public: + char b; + }; + + Child1 child1; + Base* base1 = &child1; + auto ptr1 = dynamic_cast<Child1*>(base1); + BOOST_CHECK(ptr1 != nullptr); + BOOST_CHECK_NO_THROW(armnn::PolymorphicPointerDowncast<Child1>(base1)); + BOOST_CHECK(armnn::PolymorphicPointerDowncast<Child1>(base1) == ptr1); + + auto ptr2 = dynamic_cast<Child2*>(base1); + BOOST_CHECK(ptr2 == nullptr); + BOOST_CHECK_THROW(armnn::PolymorphicPointerDowncast<Child2>(base1), std::bad_cast); + + armnn::IgnoreUnused(ptr1, ptr2); +} + + BOOST_AUTO_TEST_CASE(NumericCast) { using namespace armnn; |