| Value | Meaning |
|---|---|
| call_multi_perform-1 | please call curl_multi_perform() or curl_multi_socket*() soon |
| ok | |
| bad_handle | the passed-in handle is not a valid CURLM handle |
| bad_easy_handle | an easy handle was not good/valid |
| out_of_memory | if you ever get this, you're in deep sh*t |
| internal_error | this is a libcurl bug |
| bad_socket | the passed in socket argument did not match |
| unknown_option | curl_multi_setopt() with unsupported option |
| last |