add second step in func_ptr API implementation

Author: shssf

dpnp/backend/backend_iface.hpp

@@ -37,6 +37,7 @@
 
 #pragma once
 
+#include <cstdint>
 #include <vector>
 
 #ifdef _WIN

dpnp/backend/backend_iface_fptr.hpp

@@ -37,13 +37,10 @@
 
 #pragma once
 
+#include <cstdint>
 #include <vector>
 
-#ifdef _WIN
-#define INP_DLLEXPORT __declspec(dllexport)
-#else
-#define INP_DLLEXPORT
-#endif
+#include <backend/backend_iface.hpp>
 
 /**
  * @defgroup BACKEND_FUNC_PTR_API Backend C++ library runtime interface API

dpnp/backend/queue_sycl.cpp

@@ -112,40 +112,3 @@ void dpnp_queue_initialize_c(QueueOptions selector)
 {
     backend_sycl::backend_sycl_queue_init(selector);
 }
-
-#include <cstring>
-/**
- * Experimental interface. DO NOT USE IT!
- */
-void* get_backend_function_name(const char* func_name, const char* type_name)
-{
-    /** Implement it in this way to allow easier play with it */
-    const char* supported_func_name = "dpnp_dot";
-    const char* supported_type1_name = "double";
-    const char* supported_type2_name = "float";
-    const char* supported_type3_name = "long";
-    const char* supported_type4_name = "int";
-
-    /** of coerce it will be converted into std::map later */
-    if (!strncmp(func_name, supported_func_name, strlen(supported_func_name)))
-    {
-        if (!strncmp(type_name, supported_type1_name, strlen(supported_type1_name)))
-        {
-            return reinterpret_cast<void*>(mkl_blas_dot_c<double>);
-        }
-        else if (!strncmp(type_name, supported_type2_name, strlen(supported_type2_name)))
-        {
-            return reinterpret_cast<void*>(mkl_blas_dot_c<float>);
-        }
-        else if (!strncmp(type_name, supported_type3_name, strlen(supported_type3_name)))
-        {
-            return reinterpret_cast<void*>(custom_blas_dot_c<long>);
-        }
-        else if (!strncmp(type_name, supported_type4_name, strlen(supported_type4_name)))
-        {
-            return reinterpret_cast<void*>(custom_blas_dot_c<int>);
-        }
-    }
-
-    throw std::runtime_error("Intel NumPy Error: Unsupported function call");
-}

examples/example_experimental_iface.cpp

@@ -1,11 +1,49 @@
+//*****************************************************************************
+// Copyright (c) 2016-2020, Intel Corporation
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+// - Redistributions of source code must retain the above copyright notice,
+//   this list of conditions and the following disclaimer.
+// - Redistributions in binary form must reproduce the above copyright notice,
+//   this list of conditions and the following disclaimer in the documentation
+//   and/or other materials provided with the distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+// THE POSSIBILITY OF SUCH DAMAGE.
+//*****************************************************************************
+
+/**
+ * Example of experimental interface.
+ *
+ * This example shows how to get a runtime pointer from DPNP C++ Backend library
+ *
+ * Possible compile line:
+ * clang++ examples/example_experimental_iface.cpp -o example_experimental_iface -Idpnp -Idpnp/backend -Ldpnp -Wl,-rpath='$ORIGIN'/dpnp -ldpnp_backend_c
+ *
+ */
+
 #include <iostream>
 
-#include "backend_iface.hpp"
+#include <backend/backend_iface_fptr.hpp>
 
 int main(int, char**)
 {
     void* result = get_backend_function_name("dpnp_dot", "float");
-    std::cout << "Result Dot() function pointer: " << result << std::endl;
+    std::cout << "Result Dot() function pointer (by old interface): " << result << std::endl;
+
+    void* dpnp_fptr = get_dpnp_function_ptr(DPNPFuncName::DPNP_FN_DOT, DPNPFuncType::DPNP_FT_FLOAT);
+    std::cout << "Result Dot() function pointer: " << dpnp_fptr << std::endl;
 
     return 0;
 }

setup.py

@@ -211,6 +211,7 @@
     ["dpnp_backend_c",
         {
             "sources": [
+                "dpnp/backend/backend_iface_fptr.cpp",
                 "dpnp/backend/custom_kernels.cpp",
                 "dpnp/backend/custom_kernels_elemwise.cpp",
                 "dpnp/backend/custom_kernels_manipulation.cpp",