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+// This code contains NVIDIA Confidential Information and is disclosed to you
+// under a form of NVIDIA software license agreement provided separately to you.
+//
+// Notice
+// NVIDIA Corporation and its licensors retain all intellectual property and
+// proprietary rights in and to this software and related documentation and
+// any modifications thereto. Any use, reproduction, disclosure, or
+// distribution of this software and related documentation without an express
+// license agreement from NVIDIA Corporation is strictly prohibited.
+//
+// ALL NVIDIA DESIGN SPECIFICATIONS, CODE ARE PROVIDED "AS IS.". NVIDIA MAKES
+// NO WARRANTIES, EXPRESSED, IMPLIED, STATUTORY, OR OTHERWISE WITH RESPECT TO
+// THE MATERIALS, AND EXPRESSLY DISCLAIMS ALL IMPLIED WARRANTIES OF NONINFRINGEMENT,
+// MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE.
+//
+// Information and code furnished is believed to be accurate and reliable.
+// However, NVIDIA Corporation assumes no responsibility for the consequences of use of such
+// information or for any infringement of patents or other rights of third parties that may
+// result from its use. No license is granted by implication or otherwise under any patent
+// or patent rights of NVIDIA Corporation. Details are subject to change without notice.
+// This code supersedes and replaces all information previously supplied.
+// NVIDIA Corporation products are not authorized for use as critical
+// components in life support devices or systems without express written approval of
+// NVIDIA Corporation.
+//
+// Copyright (c) 2013-2017 NVIDIA Corporation. All rights reserved.
+
+#ifndef NV_FLEX_DEVICE_H
+#define NV_FLEX_DEVICE_H
+
+//! \cond HIDDEN_SYMBOLS
+#ifndef NV_FLEX_API
+#if _WIN32
+#define NV_FLEX_API __declspec(dllexport)
+#else
+#define NV_FLEX_API
+#endif
+#endif
+//! \endcond
+
+/** \file 
+ * NvFlexDevice is an optional helper library that performs some
+ * initialization tasks related to GPU device management.
+ * The library can be used to query the NVIDIA PhysX control panel for
+ * the selected "PhysX" GPU, and to create an optimized CUDA context.
+ * Currently the library is a closed source component but is purely optional.
+ * See the FlexDemo for an example of how to use the device API.
+ */
+
+/**
+ * Returns the CUDA ordinal of the GPU selected as "PhysX" in the NVIDIA control panel.
+ * Returns -1 if there is no NVIDIA CUDA device available.
+ *
+ * @note The returned ordinal is a CUDA ordinal and does not correspond to the DXGI
+ * ordinal. D3D users should use their own device selection method and pass the appropriate
+ * DXGI device index or custom D3D devices to NvFlexInit().
+ */
+NV_FLEX_API int NvFlexDeviceGetSuggestedOrdinal();
+
+/**
+ * Creates a CUDA context optimized for Flex, returns true on success and sets the context 
+ * as current on the calling thread. If using this method to initialize CUDA then you should 
+ * ensure that no prior CUDA calls are made prior to avoid creating multiple contexts.
+ *
+ * @param[in] ordinal The CUDA ordinal of the GPU to create the context on, this can be the suggested ordinal (see flexDeviceGetSuggestedOrdinal()), or a manually selected ordinal.
+ */
+NV_FLEX_API bool NvFlexDeviceCreateCudaContext(int ordinal);
+
+/**
+ * Destroy the context associated with the current thread, can be used to destroy the CUDA context created by flexDeviceCreateCudaContext().
+ */
+NV_FLEX_API void NvFlexDeviceDestroyCudaContext();
+
+
+#endif // NV_FLEX_DEVICE_H
+\ No newline at end of file