writefds 170 ext/curl/multi.c fd_set writefds; writefds 185 ext/curl/multi.c FD_ZERO(&writefds); writefds 188 ext/curl/multi.c curl_multi_fdset(mh->multi, &readfds, &writefds, &exceptfds, &maxfd); writefds 192 ext/curl/multi.c RETURN_LONG(select(maxfd + 1, &readfds, &writefds, &exceptfds, &to));