nss_tls.h revision 331722 
1/*-
2 * Copyright (c) 2003 Networks Associates Technology, Inc.
3 * All rights reserved.
4 *
5 * This software was developed for the FreeBSD Project by
6 * Jacques A. Vidrine, Safeport Network Services, and Network
7 * Associates Laboratories, the Security Research Division of Network
8 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
9 * ("CBOSS"), as part of the DARPA CHATS research program.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * $FreeBSD: stable/11/lib/libc/include/nss_tls.h 331722 2018-03-29 02:50:57Z eadler $
33 *
34 * Macros which generate thread local storage handling code in NSS modules.
35 */
36#ifndef _NSS_TLS_H_
37#define _NSS_TLS_H_
38
39#define NSS_TLS_HANDLING(name)					\
40static pthread_key_t name##_state_key;				\
41static	void	 name##_keyinit(void);				\
42static	int	 name##_getstate(struct name##_state **);	\
43\
44static void								\
45name##_keyinit(void)							\
46{									\
47	(void)_pthread_key_create(&name##_state_key, name##_endstate);	\
48}									\
49\
50static int							\
51name##_getstate(struct name##_state **p)			\
52{								\
53	static struct name##_state st;				\
54	static pthread_once_t	keyinit = PTHREAD_ONCE_INIT;	\
55	int			rv;				\
56								\
57	if (!__isthreaded || _pthread_main_np() != 0) {		\
58		*p = &st;					\
59		return (0);					\
60	}							\
61	rv = _pthread_once(&keyinit, name##_keyinit);		\
62	if (rv != 0)						\
63		return (rv);					\
64	*p = _pthread_getspecific(name##_state_key);		\
65	if (*p != NULL)						\
66		return (0);					\
67	*p = calloc(1, sizeof(**p));				\
68	if (*p == NULL)						\
69		return (ENOMEM);				\
70	rv = _pthread_setspecific(name##_state_key, *p);	\
71	if (rv != 0) {						\
72		free(*p);					\
73		*p = NULL;					\
74	}							\
75	return (rv);						\
76}								\
77/* allow the macro invocation to end with a semicolon */	\
78struct _clashproof_bmVjdGFy
79
80#endif /* _NSS_TLS_H_ */
81