docs/examples: do not wait when no transfers are running

Closes #2948

docs/examples/http2-download.c

@@ -189,7 +189,7 @@ int main(int argc, char **argv)
   CURL *easy[NUM_HANDLES];
   CURLM *multi_handle;
   int i;
-  int still_running; /* keep number of running handles */
+  int still_running = 0; /* keep number of running handles */
 
   if(argc > 1)
     /* if given a number, do that many transfers */
@@ -215,7 +215,7 @@ int main(int argc, char **argv)
   /* we start some action by calling perform right away */
   curl_multi_perform(multi_handle, &still_running);
 
-  do {
+  while(still_running) {
     struct timeval timeout;
     int rc; /* select() return code */
     CURLMcode mc; /* curl_multi_fdset() return code */
@@ -284,7 +284,7 @@ int main(int argc, char **argv)
       curl_multi_perform(multi_handle, &still_running);
       break;
     }
-  } while(still_running);
+  }
 
   curl_multi_cleanup(multi_handle);
 

docs/examples/http2-upload.c

@@ -245,7 +245,7 @@ int main(int argc, char **argv)
   CURL *easy[NUM_HANDLES];
   CURLM *multi_handle;
   int i;
-  int still_running; /* keep number of running handles */
+  int still_running = 0; /* keep number of running handles */
   const char *filename = "index.html";
 
   if(argc > 1)
@@ -279,7 +279,7 @@ int main(int argc, char **argv)
   /* we start some action by calling perform right away */
   curl_multi_perform(multi_handle, &still_running);
 
-  do {
+  while(still_running) {
     struct timeval timeout;
     int rc; /* select() return code */
     CURLMcode mc; /* curl_multi_fdset() return code */
@@ -348,7 +348,7 @@ int main(int argc, char **argv)
       curl_multi_perform(multi_handle, &still_running);
       break;
     }
-  } while(still_running);
+  }
 
   curl_multi_cleanup(multi_handle);
 

docs/examples/multi-app.c

@@ -48,7 +48,7 @@ int main(void)
   CURL *handles[HANDLECOUNT];
   CURLM *multi_handle;
 
-  int still_running; /* keep number of running handles */
+  int still_running = 0; /* keep number of running handles */
   int i;
 
   CURLMsg *msg; /* for picking up messages with the transfer status */
@@ -74,7 +74,7 @@ int main(void)
   /* we start some action by calling perform right away */
   curl_multi_perform(multi_handle, &still_running);
 
-  do {
+  while(still_running) {
     struct timeval timeout;
     int rc; /* select() return code */
     CURLMcode mc; /* curl_multi_fdset() return code */
@@ -142,7 +142,7 @@ int main(void)
       curl_multi_perform(multi_handle, &still_running);
       break;
     }
-  } while(still_running);
+  }
 
   /* See how the transfers went */
   while((msg = curl_multi_info_read(multi_handle, &msgs_left))) {

docs/examples/multi-debugcallback.c

@@ -131,7 +131,7 @@ int main(void)
   CURL *http_handle;
   CURLM *multi_handle;
 
-  int still_running; /* keep number of running handles */
+  int still_running = 0; /* keep number of running handles */
 
   http_handle = curl_easy_init();
 
@@ -150,7 +150,7 @@ int main(void)
   /* we start some action by calling perform right away */
   curl_multi_perform(multi_handle, &still_running);
 
-  do {
+  while(still_running) {
     struct timeval timeout;
     int rc; /* select() return code */
     CURLMcode mc; /* curl_multi_fdset() return code */
@@ -221,7 +221,7 @@ int main(void)
       curl_multi_perform(multi_handle, &still_running);
       break;
     }
-  } while(still_running);
+  }
 
   curl_multi_cleanup(multi_handle);
 

docs/examples/multi-double.c

@@ -42,7 +42,7 @@ int main(void)
   CURL *http_handle2;
   CURLM *multi_handle;
 
-  int still_running; /* keep number of running handles */
+  int still_running = 0; /* keep number of running handles */
 
   http_handle = curl_easy_init();
   http_handle2 = curl_easy_init();
@@ -63,7 +63,7 @@ int main(void)
   /* we start some action by calling perform right away */
   curl_multi_perform(multi_handle, &still_running);
 
-  do {
+  while(still_running) {
     struct timeval timeout;
     int rc; /* select() return code */
     CURLMcode mc; /* curl_multi_fdset() return code */
@@ -132,7 +132,7 @@ int main(void)
       curl_multi_perform(multi_handle, &still_running);
       break;
     }
-  } while(still_running);
+  }
 
   curl_multi_cleanup(multi_handle);
 

docs/examples/multi-formadd.c

@@ -35,7 +35,7 @@ int main(void)
   CURL *curl;
 
   CURLM *multi_handle;
-  int still_running;
+  int still_running = 0;
 
   struct curl_httppost *formpost = NULL;
   struct curl_httppost *lastptr = NULL;
@@ -83,7 +83,7 @@ int main(void)
 
     curl_multi_perform(multi_handle, &still_running);
 
-    do {
+    while(still_running) {
       struct timeval timeout;
       int rc; /* select() return code */
       CURLMcode mc; /* curl_multi_fdset() return code */
@@ -154,7 +154,7 @@ int main(void)
         printf("running: %d!\n", still_running);
         break;
       }
-    } while(still_running);
+    }
 
     curl_multi_cleanup(multi_handle);
 

docs/examples/multi-post.c

@@ -35,7 +35,7 @@ int main(void)
   CURL *curl;
 
   CURLM *multi_handle;
-  int still_running;
+  int still_running = 0;
 
   curl_mime *form = NULL;
   curl_mimepart *field = NULL;
@@ -79,7 +79,7 @@ int main(void)
 
     curl_multi_perform(multi_handle, &still_running);
 
-    do {
+    while(still_running) {
       struct timeval timeout;
       int rc; /* select() return code */
       CURLMcode mc; /* curl_multi_fdset() return code */
@@ -150,7 +150,7 @@ int main(void)
         printf("running: %d!\n", still_running);
         break;
       }
-    } while(still_running);
+    }
 
     curl_multi_cleanup(multi_handle);
 

docs/examples/multi-single.c

@@ -51,7 +51,7 @@ int main(void)
   CURL *http_handle;
   CURLM *multi_handle;
 
-  int still_running; /* keep number of running handles */
+  int still_running = 0; /* keep number of running handles */
   int repeats = 0;
 
   curl_global_init(CURL_GLOBAL_DEFAULT);
@@ -70,7 +70,7 @@ int main(void)
   /* we start some action by calling perform right away */
   curl_multi_perform(multi_handle, &still_running);
 
-  do {
+  while(still_running) {
     CURLMcode mc; /* curl_multi_wait() return code */
     int numfds;
 
@@ -97,7 +97,7 @@ int main(void)
       repeats = 0;
 
     curl_multi_perform(multi_handle, &still_running);
-  } while(still_running);
+  }
 
   curl_multi_remove_handle(multi_handle, http_handle);