source: rtems-libbsd/freebsd/lib/libc/resolv/res_state.c @ f41a394

55-freebsd-126-freebsd-12freebsd-9.3
Last change on this file since f41a394 was 3d1e767, checked in by Sebastian Huber <sebastian.huber@…>, on Apr 27, 2016 at 8:25:22 AM

Directly use <sys/types.h> provided by Newlib

  • Property mode set to 100644
File size: 2.5 KB
Line 
1#include <machine/rtems-bsd-user-space.h>
2
3/*-
4 * Copyright (c) 2006 The FreeBSD Project. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD$
28 */
29
30#include <sys/types.h>
31#include <netinet/in.h>
32#include <arpa/nameser.h>
33#include <resolv.h>
34#include <stdlib.h>
35
36#include "namespace.h"
37#include "reentrant.h"
38#include "un-namespace.h"
39
40#undef _res
41
42struct __res_state _res;
43
44static thread_key_t res_key;
45static once_t res_init_once = ONCE_INITIALIZER;
46static int res_thr_keycreated = 0;
47
48static void
49free_res(void *ptr)
50{
51        res_state statp = ptr;
52
53        if (statp->_u._ext.ext != NULL)
54                res_ndestroy(statp);
55        free(statp);
56}
57
58static void
59res_keycreate(void)
60{
61        res_thr_keycreated = thr_keycreate(&res_key, free_res) == 0;
62}
63
64res_state
65__res_state(void)
66{
67        res_state statp;
68
69#ifndef __rtems__
70        if (thr_main() != 0)
71                return (&_res);
72#endif /* __rtems__ */
73
74        if (thr_once(&res_init_once, res_keycreate) != 0 ||
75            !res_thr_keycreated)
76                return (&_res);
77
78        statp = thr_getspecific(res_key);
79        if (statp != NULL)
80                return (statp);
81        statp = calloc(1, sizeof(*statp));
82        if (statp == NULL)
83                return (&_res);
84#ifdef __BIND_RES_TEXT
85        statp->options = RES_TIMEOUT;                   /* Motorola, et al. */
86#endif
87        if (thr_setspecific(res_key, statp) == 0)
88                return (statp);
89        free(statp);
90        return (&_res);
91}
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