mirror of
https://github.com/moparisthebest/curl
synced 2024-12-23 08:38:49 -05:00
82 lines
2.4 KiB
C
82 lines
2.4 KiB
C
/* $Id$ */
|
|
|
|
/* 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 "ares_setup.h"
|
|
|
|
#ifdef HAVE_SYS_TIME_H
|
|
#include <sys/time.h>
|
|
#endif
|
|
|
|
#include <time.h>
|
|
|
|
#include "ares.h"
|
|
#include "ares_private.h"
|
|
|
|
/* WARNING: Beware that this is linear in the number of outstanding
|
|
* requests! You are probably far better off just calling ares_process()
|
|
* once per second, rather than calling ares_timeout() to figure out
|
|
* when to next call ares_process().
|
|
*/
|
|
struct timeval *ares_timeout(ares_channel channel, struct timeval *maxtv,
|
|
struct timeval *tvbuf)
|
|
{
|
|
struct query *query;
|
|
struct list_node* list_head;
|
|
struct list_node* list_node;
|
|
struct timeval now;
|
|
struct timeval nextstop;
|
|
long offset, min_offset;
|
|
|
|
/* No queries, no timeout (and no fetch of the current time). */
|
|
if (ares__is_list_empty(&(channel->all_queries)))
|
|
return maxtv;
|
|
|
|
/* Find the minimum timeout for the current set of queries. */
|
|
now = ares__tvnow();
|
|
min_offset = -1;
|
|
|
|
list_head = &(channel->all_queries);
|
|
for (list_node = list_head->next; list_node != list_head;
|
|
list_node = list_node->next)
|
|
{
|
|
query = list_node->data;
|
|
if (query->timeout.tv_sec == 0)
|
|
continue;
|
|
offset = ares__timeoffset(&now, &query->timeout);
|
|
if (offset < 0)
|
|
offset = 0;
|
|
if (min_offset == -1 || offset < min_offset)
|
|
min_offset = offset;
|
|
}
|
|
|
|
if(min_offset != -1) {
|
|
nextstop.tv_sec = min_offset/1000;
|
|
nextstop.tv_usec = (min_offset%1000)*1000;
|
|
}
|
|
|
|
/* 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 || ares__timedout(maxtv, &nextstop)))
|
|
{
|
|
*tvbuf = nextstop;
|
|
return tvbuf;
|
|
}
|
|
else
|
|
return maxtv;
|
|
}
|