1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 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.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 * SPDX-License-Identifier: curl
22 *
23 ***************************************************************************/
24 /* <DESC>
25 * Connection cache shared between easy handles with the share interface
26 * </DESC>
27 */
28 #include <stdio.h>
29 #include <curl/curl.h>
30
my_lock(CURL * handle,curl_lock_data data,curl_lock_access laccess,void * useptr)31 static void my_lock(CURL *handle, curl_lock_data data,
32 curl_lock_access laccess, void *useptr)
33 {
34 (void)handle;
35 (void)data;
36 (void)laccess;
37 (void)useptr;
38 fprintf(stderr, "-> Mutex lock\n");
39 }
40
my_unlock(CURL * handle,curl_lock_data data,void * useptr)41 static void my_unlock(CURL *handle, curl_lock_data data, void *useptr)
42 {
43 (void)handle;
44 (void)data;
45 (void)useptr;
46 fprintf(stderr, "<- Mutex unlock\n");
47 }
48
main(void)49 int main(void)
50 {
51 CURLSH *share;
52 int i;
53
54 share = curl_share_init();
55 curl_share_setopt(share, CURLSHOPT_SHARE, CURL_LOCK_DATA_CONNECT);
56
57 curl_share_setopt(share, CURLSHOPT_LOCKFUNC, my_lock);
58 curl_share_setopt(share, CURLSHOPT_UNLOCKFUNC, my_unlock);
59
60 /* Loop the transfer and cleanup the handle properly every lap. This still
61 reuses connections since the pool is in the shared object! */
62
63 for(i = 0; i < 3; i++) {
64 CURL *curl = curl_easy_init();
65 if(curl) {
66 CURLcode res;
67
68 curl_easy_setopt(curl, CURLOPT_URL, "https://curl.se/");
69
70 /* use the share object */
71 curl_easy_setopt(curl, CURLOPT_SHARE, share);
72
73 /* Perform the request, res gets the return code */
74 res = curl_easy_perform(curl);
75 /* Check for errors */
76 if(res != CURLE_OK)
77 fprintf(stderr, "curl_easy_perform() failed: %s\n",
78 curl_easy_strerror(res));
79
80 /* always cleanup */
81 curl_easy_cleanup(curl);
82 }
83 }
84
85 curl_share_cleanup(share);
86 return 0;
87 }
88
