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