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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/lib/libc/include/nss_tls.h
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/*-

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 * SPDX-License-Identifier: BSD-2-Clause

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 *

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 * Copyright (c) 2003 Networks Associates Technology, Inc.

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 * All rights reserved.

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 *

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 * This software was developed for the FreeBSD Project by

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 * Jacques A. Vidrine, Safeport Network Services, and Network

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 * Associates Laboratories, the Security Research Division of Network

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 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035

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 * ("CBOSS"), as part of the DARPA CHATS research program.

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 *

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 * Redistribution and use in source and binary forms, with or without

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 * modification, are permitted provided that the following conditions

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 * are met:

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 * 1. Redistributions of source code must retain the above copyright

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 *    notice, this list of conditions and the following disclaimer.

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 * 2. Redistributions in binary form must reproduce the above copyright

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 *    notice, this list of conditions and the following disclaimer in the

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 *    documentation and/or other materials provided with the distribution.

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 *

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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

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 * SUCH DAMAGE.

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 *

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 * Macros which generate thread local storage handling code in NSS modules.

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 */

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#ifndef _NSS_TLS_H_

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#define _NSS_TLS_H_

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#define NSS_TLS_HANDLING(name)					\

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static pthread_key_t name##_state_key;				\

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static	void	 name##_keyinit(void);				\

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static	int	 name##_getstate(struct name##_state **);	\

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\

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static void								\

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name##_keyinit(void)							\

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{									\

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	(void)_pthread_key_create(&name##_state_key, name##_endstate);	\

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}									\

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\

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static int							\

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name##_getstate(struct name##_state **p)			\

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{								\

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	static struct name##_state st;				\

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	static pthread_once_t	keyinit = PTHREAD_ONCE_INIT;	\

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	int			rv;				\

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								\

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	if (!__isthreaded || _pthread_main_np() != 0) {		\

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		*p = &st;					\

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		return (0);					\

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	}							\

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	rv = _pthread_once(&keyinit, name##_keyinit);		\

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	if (rv != 0)						\

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		return (rv);					\

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	*p = _pthread_getspecific(name##_state_key);		\

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	if (*p != NULL)						\

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		return (0);					\

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	*p = calloc(1, sizeof(**p));				\

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	if (*p == NULL)						\

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		return (ENOMEM);				\

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	rv = _pthread_setspecific(name##_state_key, *p);	\

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	if (rv != 0) {						\

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		free(*p);					\

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		*p = NULL;					\

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	}							\

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	return (rv);						\

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}								\

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/* allow the macro invocation to end with a semicolon */	\

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struct _clashproof_bmVjdGFy

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#endif /* _NSS_TLS_H_ */

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