-/* Copyright (C) 1993, 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
+/* Copyright (C) 1993-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by David Mosberger (davidm@azstarnet.com).
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, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
#ifndef _RES_HCONF_H_
#define _RES_HCONF_H_
#define TRIMDOMAINS_MAX 4
-enum Name_Service
-{
- SERVICE_NONE = 0,
- SERVICE_BIND, SERVICE_HOSTS, SERVICE_NIS,
- SERVICE_MAX
-};
-
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 num_services;
- enum Name_Service service[SERVICE_MAX];
+ 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_SPOOF (1 << 1) /* refuse spoofed addresses */
-# define HCONF_FLAG_SPOOFALERT (1 << 2) /* syslog warning of spoofed */
# 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);
+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);