//Create Multi handle
auto multi_handle = curl_multi_init();
curl_multi_setopt(multi_handle, CURLMOPT_PIPELINING, CURLPIPE_MULTIPLEX);
curl_multi_setopt(multi_handle, CURLMOPT_MAX_TOTAL_CONNECTIONS, 0);

//Create easy handle and add it to multi
auto easy_handle = curl_easy_init();
curl_multi_add_handle(multi_handle, easy_handle);

//Configure easy handle
curl_easy_setopt(m_handle, CURLOPT_URL, "http://www.example.org");
curl_easy_setopt(m_handle, CURLOPT_PRIVATE, some_handler_ptr);
curl_easy_setopt(m_handle, CURLOPT_WRITEFUNCTION, curl_write_cb);
curl_easy_setopt(m_handle, CURLOPT_TIMEOUT_MS, 12500);
m_input_buffer->reserve(EXPECTED_BODY_SIZE); //std::unique_ptr<std::vector<char>>
curl_easy_setopt(m_handle, CURLOPT_WRITEDATA, m_input_buffer.get());

//Process requests
int running_handles;
auto result = curl_multi_perform(multi_handle, &running_handles);
while(running_handles > 0)
{
    result = curl_multi_wait(multi_handle, nullptr, 0, m_timeout_milliseconds, nullptr);
    int left_performers;
    CURLMsg* performer = nullptr;
    while((performer = curl_multi_info_read(multi_handle, &left_performers)) != nullptr)
    {
        if(performer->msg == CURLMSG_DONE)
        {
            auto easy_handle = performer->easy_handle;
            //Here handler object is extracted from private data
            if(performer->data.result == CURLE_OK)
            {
                //extracted handler object is called here to process the receive buffer
                curl_multi_remove_handle(multi_handle, easy_handle);
                curl_easy_cleanup(easy_handle);
            }
            else
            {
                //Failed request needs to be retried
                curl_multi_remove_handle(multi_handle, easy_handle);
                curl_easy_cleanup(easy_handle);
                auto easy_handle = curl_easy_init();
                curl_multi_add_handle(multi_handle, easy_handle);
                curl_easy_setopt(m_handle, CURLOPT_URL, "http://www.example.org");
                curl_easy_setopt(m_handle, CURLOPT_PRIVATE, some_handler_ptr);
                curl_easy_setopt(m_handle, CURLOPT_WRITEFUNCTION, curl_write_cb);
                curl_easy_setopt(m_handle, CURLOPT_TIMEOUT_MS, 12500);
                m_input_buffer->reserve(EXPECTED_BODY_SIZE); //std::unique_ptr<std::vector<char>>
                curl_easy_setopt(m_handle, CURLOPT_WRITEDATA, m_input_buffer.get());
            }
        }
        curl_multi_perform(multi_handle, &running_handles);
    }
}