1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2011, 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 http://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 /* A multi-threaded example that uses pthreads extensively to fetch
23 * X remote files at once */
24
25 #include <stdio.h>
26 #include <pthread.h>
27 #include <curl/curl.h>
28
29 #define NUMT 4
30
31 /*
32 List of URLs to fetch.
33
34 If you intend to use a SSL-based protocol here you MUST setup the OpenSSL
35 callback functions as described here:
36
37 http://www.openssl.org/docs/crypto/threads.html#DESCRIPTION
38
39 */
40 const char * const urls[NUMT]= {
41 "http://curl.haxx.se/",
42 "ftp://cool.haxx.se/",
43 "http://www.contactor.se/",
44 "www.haxx.se"
45 };
46
pull_one_url(void * url)47 static void *pull_one_url(void *url)
48 {
49 CURL *curl;
50
51 curl = curl_easy_init();
52 curl_easy_setopt(curl, CURLOPT_URL, url);
53 curl_easy_perform(curl); /* ignores error */
54 curl_easy_cleanup(curl);
55
56 return NULL;
57 }
58
59
60 /*
61 int pthread_create(pthread_t *new_thread_ID,
62 const pthread_attr_t *attr,
63 void * (*start_func)(void *), void *arg);
64 */
65
main(int argc,char ** argv)66 int main(int argc, char **argv)
67 {
68 pthread_t tid[NUMT];
69 int i;
70 int error;
71
72 /* Must initialize libcurl before any threads are started */
73 curl_global_init(CURL_GLOBAL_ALL);
74
75 for(i=0; i< NUMT; i++) {
76 error = pthread_create(&tid[i],
77 NULL, /* default attributes please */
78 pull_one_url,
79 (void *)urls[i]);
80 if(0 != error)
81 fprintf(stderr, "Couldn't run thread number %d, errno %d\n", i, error);
82 else
83 fprintf(stderr, "Thread %d, gets %s\n", i, urls[i]);
84 }
85
86 /* now wait for all threads to terminate */
87 for(i=0; i< NUMT; i++) {
88 error = pthread_join(tid[i], NULL);
89 fprintf(stderr, "Thread %d terminated\n", i);
90 }
91
92 return 0;
93 }
94