mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-18 10:35:55 +00:00
88 lines
2.4 KiB
C
88 lines
2.4 KiB
C
/*-
|
|
* Copyright (c) 2006 The FreeBSD Project. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <netinet/in.h>
|
|
#include <arpa/nameser.h>
|
|
#include <resolv.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "namespace.h"
|
|
#include "reentrant.h"
|
|
#include "un-namespace.h"
|
|
|
|
#undef _res
|
|
|
|
struct __res_state _res;
|
|
|
|
static thread_key_t res_key;
|
|
static once_t res_init_once = ONCE_INITIALIZER;
|
|
static int res_thr_keycreated = 0;
|
|
|
|
static void
|
|
free_res(void *ptr)
|
|
{
|
|
res_state statp = ptr;
|
|
|
|
if (statp->_u._ext.ext != NULL)
|
|
res_ndestroy(statp);
|
|
free(statp);
|
|
}
|
|
|
|
static void
|
|
res_keycreate(void)
|
|
{
|
|
res_thr_keycreated = thr_keycreate(&res_key, free_res) == 0;
|
|
}
|
|
|
|
res_state
|
|
__res_state(void)
|
|
{
|
|
res_state statp;
|
|
|
|
if (thr_main() != 0)
|
|
return (&_res);
|
|
|
|
if (thr_once(&res_init_once, res_keycreate) != 0 ||
|
|
!res_thr_keycreated)
|
|
return (&_res);
|
|
|
|
statp = thr_getspecific(res_key);
|
|
if (statp != NULL)
|
|
return (statp);
|
|
statp = calloc(1, sizeof(*statp));
|
|
if (statp == NULL)
|
|
return (&_res);
|
|
#ifdef __BIND_RES_TEXT
|
|
statp->options = RES_TIMEOUT; /* Motorola, et al. */
|
|
#endif
|
|
if (thr_setspecific(res_key, statp) == 0)
|
|
return (statp);
|
|
free(statp);
|
|
return (&_res);
|
|
}
|