Define CURL_MULTIEASY when building this, to use my new curl_easy_perform()

that uses the multi interface to run the request. It is a great testbed for
the multi interface and I believe we shall do it this way for real in the
future when we have a successor to curl_multi_fdset().

lib/easy.c

@@ -355,6 +355,89 @@ CURLcode curl_easy_setopt(CURL *curl, CURLoption tag, ...)
   return ret;
 }
 
+#ifdef CURL_MULTIEASY
+/***************************************************************************
+ * This function is still only for testing purposes. It makes a great way
+ * to run the full test suite on the multi interface instead of the easy one.
+ ***************************************************************************
+ *
+ * The *new* curl_easy_perform() is the external interface that performs a
+ * transfer previously setup.
+ *
+ * Wrapper-function that: creates a multi handle, adds the easy handle to it,
+ * runs curl_multi_perform() until the transfer is done, then detaches the
+ * easy handle, destroys the multi handle and returns the easy handle's return
+ * code. This will make everything internally use and assume multi interface.
+ */
+CURLcode curl_easy_perform(CURL *easy)
+{
+  CURLM *multi;
+  CURLMcode mcode;
+  CURLcode code = CURLE_OK;
+  int still_running;
+  struct timeval timeout;
+  int rc;
+  CURLMsg *msg;
+  fd_set fdread;
+  fd_set fdwrite;
+  fd_set fdexcep;
+  int maxfd;
+
+  if(!easy)
+    return CURLE_BAD_FUNCTION_ARGUMENT;
+
+  multi = curl_multi_init();
+  if(!multi)
+    return CURLE_OUT_OF_MEMORY;
+
+  mcode = curl_multi_add_handle(multi, easy);
+  if(mcode) {
+    curl_multi_cleanup(multi);
+    return CURLE_FAILED_INIT;
+  }
+
+  /* we start some action by calling perform right away */
+
+  do {
+    while(CURLM_CALL_MULTI_PERFORM ==
+          curl_multi_perform(multi, &still_running));
+
+    if(!still_running)
+      break;
+
+    FD_ZERO(&fdread);
+    FD_ZERO(&fdwrite);
+    FD_ZERO(&fdexcep);
+
+    /* timeout once per second */
+    timeout.tv_sec = 1;
+    timeout.tv_usec = 0;
+
+    /* get file descriptors from the transfers */
+    curl_multi_fdset(multi, &fdread, &fdwrite, &fdexcep, &maxfd);
+
+    rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
+
+    if(rc == -1)
+      /* select error */
+      break;
+
+    /* timeout or data to send/receive => loop! */
+  } while(still_running);
+
+  msg = curl_multi_info_read(multi, &rc);
+  if(msg)
+    code = msg->data.result;
+
+  mcode = curl_multi_remove_handle(multi, easy);
+  /* what to do if it fails? */
+
+  mcode = curl_multi_cleanup(multi);
+  /* what to do if it fails? */
+
+  return code;
+}
+#else
 /*
  * curl_easy_perform() is the external interface that performs a transfer
  * previously setup.
@@ -389,6 +472,7 @@ CURLcode curl_easy_perform(CURL *curl)
 
   return Curl_perform(data);
 }
+#endif
 
 /*
  * curl_easy_cleanup() is the external interface to cleaning/freeing the given