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- /* Copyright (C) 1993-2019 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by David Mosberger (davidm@azstarnet.com).
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
- #ifndef _RES_HCONF_H_
- #define _RES_HCONF_H_
- #include <netdb.h>
- #define TRIMDOMAINS_MAX 4
- struct hconf
- {
- /* We keep the INITIALIZED member only for backwards compatibility. New
- code should just call _res_hconf_init unconditionally. For this field
- to be used safely, users must ensure that either (1) a call to
- _res_hconf_init happens-before any load from INITIALIZED, or (2) an
- assignment of zero to INITIALIZED happens-before any load from it, and
- these loads use acquire MO if the intent is to skip calling
- _res_hconf_init if the load returns a nonzero value. Such acquire MO
- loads will then synchronize with the release MO store to INITIALIZED
- in do_init in res_hconf.c; see pthread_once for more detail. */
- int initialized;
- int unused1;
- int unused2[4];
- int num_trimdomains;
- const char *trimdomain[TRIMDOMAINS_MAX];
- unsigned int flags;
- # define HCONF_FLAG_INITED (1 << 0) /* initialized? */
- # define HCONF_FLAG_REORDER (1 << 3) /* list best address first */
- # define HCONF_FLAG_MULTI (1 << 4) /* see comments for gethtbyname() */
- };
- extern struct hconf _res_hconf;
- extern void _res_hconf_init (void) attribute_hidden;
- extern void _res_hconf_trim_domain (char *domain);
- extern void _res_hconf_trim_domains (struct hostent *hp);
- extern void _res_hconf_reorder_addrs (struct hostent *hp);
- #endif /* _RES_HCONF_H_ */
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