// Copyright (c) Advanced Micro Devices, Inc., or its affiliates.
//
// SPDX-License-Identifier: MIT

// [sphinx-start]
#include <hip/hip_runtime.h>

#include <cstring>
#include <iostream>

#define HIP_CHECK(expression)                  \
{                                              \
    const hipError_t status = expression;      \
    if(status != hipSuccess)                   \
    {                                          \
        std::cerr << "HIP error "              \
                  << status << ": "            \
                  << hipGetErrorString(status) \
                  << " at " << __FILE__ << ":" \
                  << __LINE__ << std::endl;    \
    }                                          \
}

int main()
{
    const int element_number = 100;

    int *host_input, *host_output;
    // Host allocation
    HIP_CHECK(hipHostMalloc(&host_input, element_number * sizeof(int)));
    HIP_CHECK(hipHostMalloc(&host_output, element_number * sizeof(int)));

    // Host data preparation
    for (int i = 0; i < element_number; i++)
    {
        host_input[i] = i;
    }
    std::memset(host_output, 0, element_number * sizeof(int));

    int *device_input, *device_output;

    // Device allocation
    HIP_CHECK(hipMalloc(&device_input,  element_number * sizeof(int)));
    HIP_CHECK(hipMalloc(&device_output, element_number * sizeof(int)));

    // Device data preparation
    HIP_CHECK(hipMemcpy(device_input, host_input, element_number * sizeof(int), hipMemcpyHostToDevice));
    HIP_CHECK(hipMemset(device_output, 0, element_number * sizeof(int)));

    // Run the kernel
    // ...

    HIP_CHECK(hipMemcpy(device_input, host_input, element_number * sizeof(int), hipMemcpyHostToDevice));

    // Free host memory
    HIP_CHECK(hipFreeHost(host_input));
    HIP_CHECK(hipFreeHost(host_output));

    // Free device memory
    HIP_CHECK(hipFree(device_input));
    HIP_CHECK(hipFree(device_output));
}
// [sphinx-end]
