Base code merged to SPIN 2.4

[platform/upstream/curl.git] / docs / examples / multi-double.c

diff --git a/docs/examples/multi-double.c b/docs/examples/multi-double.c
index 2b92d55..0d8d0de 100644 (file)
--- a/docs/examples/multi-double.c
+++ b/docs/examples/multi-double.c
@@ -1,15 +1,24 @@
-/*****************************************************************************
- *                                  _   _ ____  _     
- *  Project                     ___| | | |  _ \| |    
- *                             / __| | | | |_) | |    
- *                            | (__| |_| |  _ <| |___ 
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * $Id$
+ * Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
- * This is a very simple example using the multi interface.
- */
-
+ * 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 http://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 <stdio.h>
 #include <string.h>
 
@@ -23,7 +32,7 @@
 /*
  * Simply download two HTTP files!
  */
-int main(int argc, char **argv)
+int main(void)
 {
   CURL *http_handle;
   CURL *http_handle2;
@@ -35,7 +44,7 @@ int main(int argc, char **argv)
   http_handle2 = curl_easy_init();
 
   /* set options */
-  curl_easy_setopt(http_handle, CURLOPT_URL, "http://www.haxx.se/");
+  curl_easy_setopt(http_handle, CURLOPT_URL, "http://www.example.com/");
 
   /* set options */
   curl_easy_setopt(http_handle2, CURLOPT_URL, "http://localhost/");
@@ -48,17 +57,19 @@ int main(int argc, char **argv)
   curl_multi_add_handle(multi_handle, http_handle2);
 
   /* we start some action by calling perform right away */
-  while(CURLM_CALL_MULTI_PERFORM ==
-        curl_multi_perform(multi_handle, &still_running));
+  curl_multi_perform(multi_handle, &still_running);
 
-  while(still_running) {
+  do {
     struct timeval timeout;
     int rc; /* select() return code */
+    CURLMcode mc; /* curl_multi_fdset() return code */
 
     fd_set fdread;
     fd_set fdwrite;
     fd_set fdexcep;
-    int maxfd;
+    int maxfd = -1;
+
+    long curl_timeo = -1;
 
     FD_ZERO(&fdread);
     FD_ZERO(&fdwrite);
@@ -68,10 +79,45 @@ int main(int argc, char **argv)
     timeout.tv_sec = 1;
     timeout.tv_usec = 0;
 
+    curl_multi_timeout(multi_handle, &curl_timeo);
+    if(curl_timeo >= 0) {
+      timeout.tv_sec = curl_timeo / 1000;
+      if(timeout.tv_sec > 1)
+        timeout.tv_sec = 1;
+      else
+        timeout.tv_usec = (curl_timeo % 1000) * 1000;
+    }
+
     /* get file descriptors from the transfers */
-    curl_multi_fdset(multi_handle, &fdread, &fdwrite, &fdexcep, &maxfd);
+    mc = curl_multi_fdset(multi_handle, &fdread, &fdwrite, &fdexcep, &maxfd);
+
+    if(mc != CURLM_OK)
+    {
+      fprintf(stderr, "curl_multi_fdset() failed, code %d.\n", mc);
+      break;
+    }
 
-    rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
+    /* On success the value of maxfd is guaranteed to be >= -1. We call
+       select(maxfd + 1, ...); specially in case of (maxfd == -1) there are
+       no fds ready yet so we call select(0, ...) --or Sleep() on Windows--
+       to sleep 100ms, which is the minimum suggested value in the
+       curl_multi_fdset() doc. */
+
+    if(maxfd == -1) {
+#ifdef _WIN32
+      Sleep(100);
+      rc = 0;
+#else
+      /* Portable sleep for platforms other than Windows. */
+      struct timeval wait = { 0, 100 * 1000 }; /* 100ms */
+      rc = select(0, NULL, NULL, NULL, &wait);
+#endif
+    }
+    else {
+      /* Note that on some platforms 'timeout' may be modified by select().
+         If you need access to the original value save a copy beforehand. */
+      rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
+    }
 
     switch(rc) {
     case -1:
@@ -83,7 +129,7 @@ int main(int argc, char **argv)
       curl_multi_perform(multi_handle, &still_running);
       break;
     }
-  }
+  } while(still_running);
 
   curl_multi_cleanup(multi_handle);