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, 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.

EXAMPLE

       struct timeval timeout;
       long timeo;

       curl_multi_timeout(multi_handle, &timeo);
       if(timeo < 0)
         /* no set timeout, use a default */
         timeo = 980;

       timeout.tv_sec = timeo / 1000;
       timeout.tv_usec = (timeo % 1000) * 1000;

       /* wait for activities no longer than the set timeout */
       select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);

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)