CUDAUtils.h

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// -                        Open3D: www.open3d.org                            -
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// The MIT License (MIT)
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// Copyright (c) 2018 www.open3d.org
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#pragma once

#include "open3d/utility/Console.h"

#ifdef BUILD_CUDA_MODULE

#include <cuda.h>
#include <cuda_runtime.h>

#define OPEN3D_HOST_DEVICE __host__ __device__
#define OPEN3D_DEVICE __device__
#define OPEN3D_ASSERT_HOST_DEVICE_LAMBDA(type)                            \
    static_assert(__nv_is_extended_host_device_lambda_closure_type(type), \
                  #type " must be a __host__ __device__ lambda")
#define OPEN3D_CUDA_CHECK(err) \
    open3d::core::__OPEN3D_CUDA_CHECK(err, __FILE__, __LINE__)
#define OPEN3D_GET_LAST_CUDA_ERROR(message) \
    __OPEN3D_GET_LAST_CUDA_ERROR(message, __FILE__, __LINE__)

#define CUDA_CALL(cuda_function, ...) cuda_function(__VA_ARGS__);

#else  // #ifdef BUILD_CUDA_MODULE

#define OPEN3D_HOST_DEVICE
#define OPEN3D_DEVICE
#define OPEN3D_ASSERT_HOST_DEVICE_LAMBDA(type)
#define OPEN3D_CUDA_CHECK(err)
#define OPEN3D_GET_LAST_CUDA_ERROR(message)
#define CUDA_CALL(cuda_function, ...) \
    utility::LogError("Not built with CUDA, cannot call " #cuda_function);

#endif  // #ifdef BUILD_CUDA_MODULE

namespace open3d {
namespace core {

#ifdef BUILD_CUDA_MODULE
inline void __OPEN3D_CUDA_CHECK(cudaError_t err,
                                const char* file,
                                const int line) {
    if (err != cudaSuccess) {
        utility::LogError("{}:{} CUDA runtime error: {}", file, line,
                          cudaGetErrorString(err));
    }
}

inline void __OPEN3D_GET_LAST_CUDA_ERROR(const char* message,
                                         const char* file,
                                         const int line) {
    cudaError_t err = cudaGetLastError();
    if (err != cudaSuccess) {
        utility::LogError("{}:{} {}: OPEN3D_GET_LAST_CUDA_ERROR(): {}", file,
                          line, message, cudaGetErrorString(err));
    }
}

inline int GetCUDACurrentDeviceTextureAlignment() {
    int device = 0;
    cudaError_t err = cudaGetDevice(&device);
    if (err != cudaSuccess) {
        utility::LogError(
                "GetCUDACurrentDeviceTextureAlignment(): cudaGetDevice failed "
                "with {}",
                cudaGetErrorString(err));
    }

    int value = 0;
    err = cudaDeviceGetAttribute(&value, cudaDevAttrTextureAlignment, device);
    if (err != cudaSuccess) {
        utility::LogError(
                "GetCUDACurrentDeviceTextureAlignment(): "
                "cudaDeviceGetAttribute failed with {}",
                cudaGetErrorString(err));
    }
    return value;
}
#endif

namespace cuda {

int DeviceCount();
bool IsAvailable();
void ReleaseCache();

}  // namespace cuda
}  // namespace core
}  // namespace open3d