Merge pull request #80 from ReflectCxx/temp_dev

- Introduced rtl::LambdaFunction
- tried replacing std::function with custom
- exact same overhead, removed 'LambdaFunction'
- minor changes.

Author: neeraj31285

RTLBenchmarkApp/src/BenchMark.cpp

@@ -6,6 +6,8 @@
 
 #include "BenchMark.h"
 
+#include "LambdaFunction.h"
+
 
 namespace {
 
@@ -14,11 +16,10 @@ namespace {
     "nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure"
     "dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Except"
     "eur ssint occaecat cupidatat nnon proident, sunt in culpa qui officia deserunt mollit anim id";
-
-    // Pre-created string to isolate call overhead
-    static const std::string g_longStr(LONG_STR);
 }
 
+// Pre-created string to isolate call overhead
+static const std::string g_longStr(LONG_STR);
 
 namespace rtl_bench
 {
@@ -34,9 +35,9 @@ namespace rtl_bench
 
     void BenchMark::autoLambdaCall_noReturn(benchmark::State& state)
     {
-        auto sendMsg = [](const str_type& pMsg) {
+        static auto sendMsg = [](const str_type& pMsg) {
             sendMessage(pMsg);
-            };
+        };
 
         for (auto _ : state)
         {
@@ -50,7 +51,7 @@ namespace rtl_bench
     {
         static std::function sendMsg = [](const str_type& pMsg) {
             sendMessage(pMsg);
-            };
+        };
 
         for (auto _ : state)
         {
@@ -78,7 +79,7 @@ namespace rtl_bench
     {
         auto getMsg = [](const str_type& pMsg) {
             return getMessage(pMsg);
-            };
+        };
 
         for (auto _ : state)
         {
@@ -91,14 +92,13 @@ namespace rtl_bench
     {
         static std::function getMsg = [](const str_type& pMsg) {
             return getMessage(pMsg);
-            };
+        };
 
         for (auto _ : state)
         {
             benchmark::DoNotOptimize(getMsg(g_longStr));
         }
     }
-
 }
 
 
@@ -171,7 +171,7 @@ namespace rtl_bench
     {
         static rtl::Record rNode = cxx_mirror().getRecord("Node").value();
         static rtl::Method getMsg = rNode.getMethod("getMessage").value();
-        static rtl::RObject robj = rNode.create<rtl::alloc::Stack>().rObject;
+        static rtl::RObject robj = rNode.create<rtl::alloc::Heap>().rObject;
         static auto _ = []() {
             if (getMsg.bind<str_type>(robj).call(g_longStr).err == rtl::error::None) {
                 std::cout << "[rtl:3] call success.\n";
@@ -187,4 +187,4 @@ namespace rtl_bench
             benchmark::DoNotOptimize(getMsg.bind<str_type>(robj).call(g_longStr));
         }
     }
-}
+}

RTLBenchmarkApp/src/BenchMark.h

@@ -4,8 +4,6 @@
 
 #include "RTLibInterface.h"
 
-#include <streambuf>
-
 #if defined(_MSC_VER)
 #  define NOINLINE __declspec(noinline)
 #elif defined(__GNUC__)
@@ -14,30 +12,44 @@
 #  define NOINLINE
 #endif
 
-using str_type = std::string; //*/ std::string_view;
+using str_type = /*std::string; //*/ std::string_view;
 
 namespace rtl_bench
 {
     static std::optional<std::string> g_msg;
 
     NOINLINE static void sendMessage(str_type pMsg) {
+        std::string result = std::string(pMsg) + std::string(pMsg);
+        result = result + result;
+        result = result + result;
         g_msg = pMsg;
     }
 
     NOINLINE static str_type getMessage(str_type pMsg) {
+        std::string result = std::string(pMsg) + std::string(pMsg);
+        result = result + result;
+        result = result + result;
         g_msg = pMsg;
-        return str_type(pMsg);
+        return str_type(g_msg->c_str());
     }
 
     struct Node
     {
         NOINLINE void sendMessage(str_type pMsg) {
+            std::string result = std::string(pMsg) + std::string(pMsg);
+            result = result + result;
+            result = result + result;
+            g_msg = pMsg;
             g_msg = pMsg;
         }
 
-        NOINLINE str_type getMessage(str_type pMsg) {
+        NOINLINE str_type getMessage(str_type pMsg) 
+        {
+            std::string result = std::string(pMsg) + std::string(pMsg);
+            result = result + result;
+            result = result + result;
             g_msg = pMsg;
-            return str_type(pMsg);
+            return str_type(g_msg->c_str());
         }
     };
 

RTLBenchmarkApp/src/main.cpp

@@ -4,9 +4,6 @@
 
 #include "BenchMark.h"
 
-// ------------------------------------------------------------
-// Register benchmarks
-// ------------------------------------------------------------
 
 BENCHMARK(rtl_bench::BenchMark::directCall_noReturn);
 BENCHMARK(rtl_bench::BenchMark::autoLambdaCall_noReturn);

ReflectionTemplateLib/detail/inc/LambdaFunction.h

@@ -0,0 +1,41 @@
+#pragma once
+
+#include "RObjectBuilder.hpp"
+
+namespace rtl::detail 
+{
+    template<class _retT, class... _signature>
+    struct LambdaFunction 
+    {
+        using Invoker = _retT(*)(void* , _signature&...);
+
+        Invoker m_invoker = nullptr;
+        void* m_storage = nullptr;
+
+        template<class _returnType>
+        void init(_returnType(*pFunctor)(_signature...))
+        {
+            struct Holder {
+                
+                using Functor = decltype(pFunctor);
+                Functor m_functor;
+
+                Holder(Functor pFptr) : m_functor(pFptr) { }
+            };
+
+            static auto holder = Holder{ pFunctor };
+            m_storage = &holder;
+
+            m_invoker = +[](void* stor, _signature&... params) -> _retT {
+
+                auto h = static_cast<Holder*>(stor);
+                return (h->m_functor)(params...);
+            };
+        }
+
+        _retT operator()(_signature&... params)
+        {
+            return m_invoker(m_storage, params...);
+        }
+    };
+}