throw python constants to dpnpc (#925)

Author: shssf

dpnp/backend/CMakeLists.txt

@@ -184,6 +184,7 @@ set(DPNP_SRC
     kernels/dpnp_krnl_searching.cpp
     kernels/dpnp_krnl_sorting.cpp
     kernels/dpnp_krnl_statistics.cpp
+    src/constants.cpp
     src/dpnp_iface_fptr.cpp
     src/memory_sycl.cpp
     src/queue_sycl.cpp

dpnp/backend/src/constants.cpp

@@ -0,0 +1,43 @@
+//*****************************************************************************
+// 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.
+//*****************************************************************************
+
+#include <iostream>
+
+#include "constants.hpp"
+
+void* python_constants::py_none = nullptr;
+void* python_constants::py_nan = nullptr;
+
+void dpnp_python_constants_initialize_c(void *_py_none, void *_py_nan)
+{
+    python_constants::py_none = _py_none;
+    python_constants::py_nan = _py_nan;
+//    std::cout << "========dpnp_python_constants_initialize_c=============" << std::endl;
+//    std::cout << "\t None=" << _py_none
+//              << "\n\t NaN=" << _py_nan
+//              << "\n\t py_none=" << python_constants::py_none
+//              << "\n\t py_nan=" << python_constants::py_nan
+//              << std::endl;
+}

dpnp/backend/src/constants.hpp

@@ -0,0 +1,58 @@
+//*****************************************************************************
+// 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.
+//*****************************************************************************
+
+#pragma once
+#ifndef CONSTANTS_H // Cython compatibility
+#define CONSTANTS_H
+
+#ifdef _WIN32
+#define INP_DLLEXPORT __declspec(dllexport)
+#else
+#define INP_DLLEXPORT
+#endif
+
+
+/**
+ * This is container for the constants from Python interpreter and other modules. These constants are subject to use
+ * in algorithms.
+ */
+struct python_constants
+{
+    static void* py_none; /**< Python None */
+    static void* py_nan;  /**< Python NAN or NumPy.nan */
+};
+
+/**
+ * @ingroup BACKEND_API
+ * @brief Python constants initialization in the backend.
+ *
+ * Global values from Python to use in algorithms.
+ *
+ * @param [in]  py_none   Python NONE representation
+ * @param [in]  py_nan    Python NAN representation
+ */
+INP_DLLEXPORT void dpnp_python_constants_initialize_c(void *py_none, void *py_nan);
+
+#endif // CONSTANTS_H

dpnp/dpnp_algo/dpnp_algo.pxd

@@ -218,6 +218,9 @@ cdef extern from "dpnp_iface.hpp" namespace "QueueOptions":  # need this namespa
         GPU_SELECTOR
         AUTO_SELECTOR
 
+cdef extern from "constants.hpp":
+    void dpnp_python_constants_initialize_c(void* py_none, void* py_nan)
+
 cdef extern from "dpnp_iface.hpp":
     void dpnp_queue_initialize_c(QueueOptions selector)
     size_t dpnp_queue_is_cpu_c()

dpnp/dpnp_algo/dpnp_algo.pyx

@@ -188,6 +188,8 @@ cpdef dpnp_queue_initialize():
         queue_type = GPU_SELECTOR
 
     dpnp_queue_initialize_c(queue_type)
+    dpnp_python_constants_initialize_c(<void*> None,
+                                       <void*> dpnp.nan)
 
     # TODO:
     # choose seed number as is in numpy

utils/command_build_clib.py

@@ -178,6 +178,7 @@
                 "dpnp/backend/kernels/dpnp_krnl_statistics.cpp",
                 "dpnp/backend/src/dpnp_iface_fptr.cpp",
                 "dpnp/backend/src/memory_sycl.cpp",
+                "dpnp/backend/src/constants.cpp"
                 "dpnp/backend/src/queue_sycl.cpp"
             ],
         }