ares_timeout.txt

来自「RTL-lwIP is the porting of the lwIP TCP/」· 文本 代码 · 共 37 行

ARES_TIMEOUT(3)                                                ARES_TIMEOUT(3)



NAME
       ares_fds - Get file descriptors to select on for name service

SYNOPSIS
       #include <ares.h>

       struct timeval *ares_timeout(ares_channel channel,
       struct timeval *maxtv, struct timeval *tvbuf)

DESCRIPTION
       The  ares_timeout  function  determines  the maximum time for which the
       caller should wait before invoking ares_process(3) to process timeouts.
       The  parameter  maxtv  specifies a existing maximum timeout, or NULL if
       the caller does not wish to apply a  maximum  timeout.   The  parameter
       tvbuf  must  point  to a writable buffer of type struct timeval.  It is
       valid for maxtv and tvbuf to have the same value.

       If no queries have timeouts pending sooner than the given maximum time-
       out,  ares_timeout  returns  the value of maxtv; otherwise ares_timeout
       stores the appropriate timeout value into  the  buffer  pointed  to  by
       tvbuf and returns the value of tvbuf.

SEE ALSO
       ares_fds(3), ares_process(3)

AUTHOR
       Greg Hudson, MIT Information Systems
       Copyright 1998 by the Massachusetts Institute of Technology.



                                 25 July 1998                  ARES_TIMEOUT(3)