// SPDX-FileCopyrightText: Copyright (c) 2011, Duane Merrill. All rights reserved.
// SPDX-FileCopyrightText: Copyright (c) 2011-2024, NVIDIA CORPORATION. All rights reserved.
// SPDX-License-Identifier: BSD-3

/******************************************************************************
 * Common C/C++ macro utilities
 ******************************************************************************/

#pragma once

#include <cuda/__cccl_config>

#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)
#  pragma GCC system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)
#  pragma clang system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)
#  pragma system_header
#endif // no system header

#include <cub/detail/detect_cuda_runtime.cuh> // IWYU pragma: export
#include <cub/util_namespace.cuh> // IWYU pragma: export

CUB_NAMESPACE_BEGIN

#ifdef _CCCL_DOXYGEN_INVOKED
#  define CUB_DISABLE_KERNEL_VISIBILITY_WARNING_SUPPRESSION
#endif

/**
 * @def CUB_DISABLE_KERNEL_VISIBILITY_WARNING_SUPPRESSION
 * If defined, the default suppression of kernel visibility attribute warning is disabled.
 */
#if !defined(CUB_DISABLE_KERNEL_VISIBILITY_WARNING_SUPPRESSION)
_CCCL_DIAG_SUPPRESS_GCC("-Wattributes")
_CCCL_DIAG_SUPPRESS_CLANG("-Wattributes")
#  if !_CCCL_CUDA_COMPILER(NVHPC)
_CCCL_DIAG_SUPPRESS_NVHPC(attribute_requires_external_linkage)
#  endif // !_CCCL_CUDA_COMPILER(NVHPC)
#endif // !CUB_DISABLE_KERNEL_VISIBILITY_WARNING_SUPPRESSION

#ifndef CUB_DEFINE_KERNEL_GETTER
#  define CUB_DEFINE_KERNEL_GETTER(name, ...)                                               \
    _CCCL_HIDE_FROM_ABI CUB_RUNTIME_FUNCTION static constexpr decltype(&__VA_ARGS__) name() \
    {                                                                                       \
      return &__VA_ARGS__;                                                                  \
    }
#endif

// TODO(bgruber): drop in CCCL 4.0 when we drop the public dispatchers
#ifndef CUB_DEFINE_SUB_POLICY_GETTER
#  define CUB_DEFINE_SUB_POLICY_GETTER(name)                            \
    _CCCL_HOST_DEVICE static constexpr auto name()                      \
    {                                                                   \
      return MakePolicyWrapper(typename StaticPolicyT::name##Policy()); \
    }
#endif

#if defined(CUB_DEFINE_RUNTIME_POLICIES)
#  define CUB_DETAIL_STATIC_ISH_ASSERT(expr, msg) _CCCL_ASSERT(expr, msg)
#  define CUB_DETAIL_CONSTEXPR_ISH
#else // ^^^ CUB_DEFINE_RUNTIME_POLICIES ^^^ / vvv !CUB_DEFINE_RUNTIME_POLICIES vvv
#  define CUB_DETAIL_STATIC_ISH_ASSERT(expr, msg) static_assert(expr, msg);
#  define CUB_DETAIL_CONSTEXPR_ISH                constexpr
#endif // !(CUB_DEFINE_RUNTIME_POLICIES)

CUB_NAMESPACE_END