CentOS 7.0 - man page for curl_multi_timeout (centos section 3)

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 fig-
       ure 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  any-
       thing. If it returns -1, there's no timeout at all set.

       An  application	that  uses  the multi_socket API SHOULD not use this function, but SHOULD
       instead use curl_multi_setopt(3) and its  CURLMOPT_TIMERFUNCTION  option  for  proper  and
       desired behavior.

       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_fdset(3), curl_multi_info_read(3), curl_multi_socket(3), curl_multi_setopt(3)

libcurl 7.16.0				    2 Jan 2006			    curl_multi_timeout(3)