mirror of
https://github.com/moparisthebest/curl
synced 2024-12-22 16:18:48 -05:00
66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
|
/* Copyright 1998 by the Massachusetts Institute of Technology.
|
||
|
|
*
|
||
|
|
* Permission to use, copy, modify, and distribute this
|
||
|
|
* software and its documentation for any purpose and without
|
||
|
|
* fee is hereby granted, provided that the above copyright
|
||
|
|
* notice appear in all copies and that both that copyright
|
||
|
|
* notice and this permission notice appear in supporting
|
||
|
|
* documentation, and that the name of M.I.T. not be used in
|
||
|
|
* advertising or publicity pertaining to distribution of the
|
||
|
|
* software without specific, written prior permission.
|
||
|
|
* M.I.T. makes no representations about the suitability of
|
||
|
|
* this software for any purpose. It is provided "as is"
|
||
|
|
* without express or implied warranty.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <sys/types.h>
|
||
|
|
|
||
|
|
#ifdef WIN32
|
||
|
|
|
||
|
|
#else
|
||
|
|
#include <sys/time.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include <time.h>
|
||
|
|
#include "ares.h"
|
||
|
|
#include "ares_private.h"
|
||
|
|
|
||
|
|
struct timeval *ares_timeout(ares_channel channel, struct timeval *maxtv,
|
||
|
|
struct timeval *tvbuf)
|
||
|
|
{
|
||
|
|
struct query *query;
|
||
|
|
time_t now;
|
||
|
|
int offset, min_offset;
|
||
|
|
|
||
|
|
/* No queries, no timeout (and no fetch of the current time). */
|
||
|
|
if (!channel->queries)
|
||
|
|
return maxtv;
|
||
|
|
|
||
|
|
/* Find the minimum timeout for the current set of queries. */
|
||
|
|
time(&now);
|
||
|
|
min_offset = -1;
|
||
|
|
for (query = channel->queries; query; query = query->next)
|
||
|
|
{
|
||
|
|
if (query->timeout == 0)
|
||
|
|
continue;
|
||
|
|
offset = query->timeout - now;
|
||
|
|
if (offset < 0)
|
||
|
|
offset = 0;
|
||
|
|
if (min_offset == -1 || offset < min_offset)
|
||
|
|
min_offset = offset;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* If we found a minimum timeout and it's sooner than the one
|
||
|
|
* specified in maxtv (if any), return it. Otherwise go with
|
||
|
|
* maxtv.
|
||
|
|
*/
|
||
|
|
if (min_offset != -1 && (!maxtv || min_offset <= maxtv->tv_sec))
|
||
|
|
{
|
||
|
|
tvbuf->tv_sec = min_offset;
|
||
|
|
tvbuf->tv_usec = 0;
|
||
|
|
return tvbuf;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
return maxtv;
|
||
|
|
}
|