curl_multi_timeout(3) libcurl Manual curl_multi_timeout(3)
NAME curl_multi_timeout - how long to wait for action before proceeding
SYNOPSIS #include <curl/curl.h>
CURLMcode curl_multi_timeout(CURLM *multi_handle, long *timeout);
DESCRIPTION An application using the libcurl multi interface should call curl_multi_timeout(3) to figure out how long it should wait for socket actions - at most - before proceeding.
Proceeding means either doing the socket-style timeout action: call the curl_multi_socket_action(3) function with the sockfd argument set to CURL_SOCKET_TIMEOUT, or call curl_multi_perform(3) if you re using the simpler and older multi interface approach.
The timeout value returned in the long timeout points to, is in number of milliseconds at this very moment. If 0, it means you should proceed immediately without waiting for anything. If it returns -1, theres no timeout at all set.
Note: if libcurl returns a -1 timeout here, it just means that libcurl currently has no stored timeout value. You must not wait too long (more than a few seconds perhaps) before you call curl_multi_perform() again.
RETURN VALUE The standard CURLMcode for multi interface error codes.
TYPICAL USAGE Call curl_multi_timeout(3), then wait for action on the sockets. You figure out which sockets to wait for by calling curl_multi_fdset(3) or by a previous call to curl_multi_socket(3).
AVAILABILITY This function was added in libcurl 7.15.4.
SEE ALSO curl_multi_cleanup(3), curl_multi_init(3), curl_multi_fdset(3), curl_multi_info_read(3), curl_multi_socket(3)
libcurl 7.16.0 2 Jan 2006 curl_multi_timeout(3)