#include <curl/curl.h>
#include <stdio.h>

int main(void) {
  CURL *parent = curl_easy_init();
  CURL *child  = curl_easy_init();

  if(!parent || !child) {
    fprintf(stderr, "init failed\n");
    return 1;
  }

  curl_easy_setopt(parent, CURLOPT_HTTP_VERSION, (long)CURL_HTTP_VERSION_2_0);
  curl_easy_setopt(child,  CURLOPT_HTTP_VERSION, (long)CURL_HTTP_VERSION_2_0);

  /* Set stream dependency of child on parent. */
  curl_easy_setopt(child, CURLOPT_STREAM_DEPENDS, parent);

  curl_easy_reset(child);
  curl_easy_cleanup(child);

  curl_easy_cleanup(parent);

  return 0;
}