text: /***************************************************************************
   *                                  _   _ ____  _
   *  Project                     ___| | | |  _ \| |
   *                             / __| | | | |_) | |
   *                            | (__| |_| |  _ <| |___
   *                             \___|\___/|_| \_\_____|
   *
   * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
   *
   * This software is licensed as described in the file COPYING, which
   * you should have received as part of this distribution. The terms
   * are also available at https://curl.haxx.se/docs/copyright.html.
   *
   * You may opt to use, copy, modify, merge, publish, distribute and/or sell
   * copies of the Software, and permit persons to whom the Software is
   * furnished to do so, under the terms of the COPYING file.
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
   * KIND, either express or implied.
   *
   ***************************************************************************/
  #include "test.h"
  #include "memdebug.h"
  
  static void my_lock(CURL *handle, curl_lock_data data,
                      curl_lock_access laccess, void *useptr)
  {
    (void)handle;
    (void)data;
    (void)laccess;
    (void)useptr;
    printf("-> Mutex lock\n");
  }
  
  static void my_unlock(CURL *handle, curl_lock_data data, void *useptr)
  {
    (void)handle;
    (void)data;
    (void)useptr;
    printf("<- Mutex unlock\n");
  }
  
  /* test function */
  int test(char *URL)
  {
    CURLcode res = CURLE_OK;
    CURLSH *share;
    int i;
  
    global_init(CURL_GLOBAL_ALL);
  
    share = curl_share_init();
    if(!share) {
      fprintf(stderr, "curl_share_init() failed\n");
      curl_global_cleanup();
      return TEST_ERR_MAJOR_BAD;
    }
  
    curl_share_setopt(share, CURLSHOPT_SHARE, CURL_LOCK_DATA_CONNECT);
    curl_share_setopt(share, CURLSHOPT_LOCKFUNC, my_lock);
    curl_share_setopt(share, CURLSHOPT_UNLOCKFUNC, my_unlock);
  
    /* Loop the transfer and cleanup the handle properly every lap. This will
       still reuse connections since the pool is in the shared object! */
  
    for(i = 0; i < 3; i++) {
      CURL *curl = curl_easy_init();
      if(curl) {
        curl_easy_setopt(curl, CURLOPT_URL, URL);
  
        /* use the share object */
        curl_easy_setopt(curl, CURLOPT_SHARE, share);
  
        /* Perform the request, res will get the return code */
        res = curl_easy_perform(curl);
        /* Check for errors */
        if(res != CURLE_OK)
          fprintf(stderr, "curl_easy_perform() failed: %s\n",
                  curl_easy_strerror(res));
  
        /* always cleanup */
        curl_easy_cleanup(curl);
      }
    }
  
    curl_share_cleanup(share);
    curl_global_cleanup();
  
    return 0;
  }
  