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Annotation of embedaddon/curl/docs/examples/shared-connection-cache.c, revision 1.1.1.1

1.1       misho       1: /***************************************************************************
                      2:  *                                  _   _ ____  _
                      3:  *  Project                     ___| | | |  _ \| |
                      4:  *                             / __| | | | |_) | |
                      5:  *                            | (__| |_| |  _ <| |___
                      6:  *                             \___|\___/|_| \_\_____|
                      7:  *
                      8:  * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
                      9:  *
                     10:  * This software is licensed as described in the file COPYING, which
                     11:  * you should have received as part of this distribution. The terms
                     12:  * are also available at https://curl.haxx.se/docs/copyright.html.
                     13:  *
                     14:  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
                     15:  * copies of the Software, and permit persons to whom the Software is
                     16:  * furnished to do so, under the terms of the COPYING file.
                     17:  *
                     18:  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
                     19:  * KIND, either express or implied.
                     20:  *
                     21:  ***************************************************************************/
                     22: /* <DESC>
                     23:  * Connection cache shared between easy handles with the share interface
                     24:  * </DESC>
                     25:  */
                     26: #include <stdio.h>
                     27: #include <curl/curl.h>
                     28: 
                     29: static void my_lock(CURL *handle, curl_lock_data data,
                     30:                     curl_lock_access laccess, void *useptr)
                     31: {
                     32:   (void)handle;
                     33:   (void)data;
                     34:   (void)laccess;
                     35:   (void)useptr;
                     36:   fprintf(stderr, "-> Mutex lock\n");
                     37: }
                     38: 
                     39: static void my_unlock(CURL *handle, curl_lock_data data, void *useptr)
                     40: {
                     41:   (void)handle;
                     42:   (void)data;
                     43:   (void)useptr;
                     44:   fprintf(stderr, "<- Mutex unlock\n");
                     45: }
                     46: 
                     47: int main(void)
                     48: {
                     49:   CURLSH *share;
                     50:   int i;
                     51: 
                     52:   share = curl_share_init();
                     53:   curl_share_setopt(share, CURLSHOPT_SHARE, CURL_LOCK_DATA_CONNECT);
                     54: 
                     55:   curl_share_setopt(share, CURLSHOPT_LOCKFUNC, my_lock);
                     56:   curl_share_setopt(share, CURLSHOPT_UNLOCKFUNC, my_unlock);
                     57: 
                     58:   /* Loop the transfer and cleanup the handle properly every lap. This will
                     59:      still reuse connections since the pool is in the shared object! */
                     60: 
                     61:   for(i = 0; i < 3; i++) {
                     62:     CURL *curl = curl_easy_init();
                     63:     if(curl) {
                     64:       CURLcode res;
                     65: 
                     66:       curl_easy_setopt(curl, CURLOPT_URL, "https://curl.haxx.se/");
                     67: 
                     68:       /* use the share object */
                     69:       curl_easy_setopt(curl, CURLOPT_SHARE, share);
                     70: 
                     71:       /* Perform the request, res will get the return code */
                     72:       res = curl_easy_perform(curl);
                     73:       /* Check for errors */
                     74:       if(res != CURLE_OK)
                     75:         fprintf(stderr, "curl_easy_perform() failed: %s\n",
                     76:                 curl_easy_strerror(res));
                     77: 
                     78:       /* always cleanup */
                     79:       curl_easy_cleanup(curl);
                     80:     }
                     81:   }
                     82: 
                     83:   curl_share_cleanup(share);
                     84:   return 0;
                     85: }