curl_multi_select Wait for activity on any curl_multi connection &reftitle.description; intcurl_multi_select CurlMultiHandlemulti_handle floattimeout1.0 Blocks until there is activity on any of the curl_multi connections. &reftitle.parameters; &curl.mh.description; timeout Time, in seconds, to wait for a response. &reftitle.returnvalues; On success, returns the number of descriptors contained in the descriptor sets. This may be 0 if there was no activity on any of the descriptors. On failure, this function will return -1 on a select failure (from the underlying select system call). &reftitle.changelog; &Version; &Description; &curl.changelog.multi-handle-param; &reftitle.seealso; curl_multi_init