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/*
* Copyright 2008-2018 NVIDIA Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <thrust/detail/config/cpp_dialect.h>
#include <cstddef>
#ifndef __has_cpp_attribute
# define __has_cpp_attribute(X) 0
#endif
// Trailing return types seem to confuse Doxygen, and cause it to interpret
// parts of the function's body as new function signatures.
#if defined(THRUST_DOXYGEN)
# define THRUST_TRAILING_RETURN(...)
#else
# define THRUST_TRAILING_RETURN(...) -> __VA_ARGS__
#endif
#if THRUST_CPP_DIALECT >= 2014 && __has_cpp_attribute(nodiscard)
# define THRUST_NODISCARD [[nodiscard]]
#else
# define THRUST_NODISCARD
#endif
#if THRUST_CPP_DIALECT >= 2017 && __cpp_if_constexpr
# define THRUST_IF_CONSTEXPR if constexpr
#else
# define THRUST_IF_CONSTEXPR if
#endif
// FIXME: Combine THRUST_INLINE_CONSTANT and
// THRUST_INLINE_INTEGRAL_MEMBER_CONSTANT into one macro when NVCC properly
// supports `constexpr` globals in host and device code.
#if defined(__CUDA_ARCH__) || defined(_NVHPC_CUDA)
// FIXME: Add this when NVCC supports inline variables.
//# if THRUST_CPP_DIALECT >= 2017
//# define THRUST_INLINE_CONSTANT inline constexpr
//# define THRUST_INLINE_INTEGRAL_MEMBER_CONSTANT inline constexpr
# if THRUST_CPP_DIALECT >= 2011
# define THRUST_INLINE_CONSTANT static const __device__
# define THRUST_INLINE_INTEGRAL_MEMBER_CONSTANT static constexpr
# else
# define THRUST_INLINE_CONSTANT static const __device__
# define THRUST_INLINE_INTEGRAL_MEMBER_CONSTANT static const
# endif
#else
// FIXME: Add this when NVCC supports inline variables.
//# if THRUST_CPP_DIALECT >= 2017
//# define THRUST_INLINE_CONSTANT inline constexpr
//# define THRUST_INLINE_INTEGRAL_MEMBER_CONSTANT inline constexpr
# if THRUST_CPP_DIALECT >= 2011
# define THRUST_INLINE_CONSTANT static constexpr
# define THRUST_INLINE_INTEGRAL_MEMBER_CONSTANT static constexpr
# else
# define THRUST_INLINE_CONSTANT static const
# define THRUST_INLINE_INTEGRAL_MEMBER_CONSTANT static const
# endif
#endif
#if defined(_NVHPC_CUDA)
# define THRUST_IS_DEVICE_CODE __builtin_is_device_code()
# define THRUST_IS_HOST_CODE (!__builtin_is_device_code())
# define THRUST_INCLUDE_DEVICE_CODE 1
# define THRUST_INCLUDE_HOST_CODE 1
#elif defined(__CUDA_ARCH__)
# define THRUST_IS_DEVICE_CODE 1
# define THRUST_IS_HOST_CODE 0
# define THRUST_INCLUDE_DEVICE_CODE 1
# define THRUST_INCLUDE_HOST_CODE 0
#else
# define THRUST_IS_DEVICE_CODE 0
# define THRUST_IS_HOST_CODE 1
# define THRUST_INCLUDE_DEVICE_CODE 0
# define THRUST_INCLUDE_HOST_CODE 1
#endif
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