46d9306383
may be built into libc (`static NSS modules') or dynamically loaded via dlopen (`dynamic NSS modules'). Modules are loaded/initialized at configuration time (i.e. when nsdispatch is called and nsswitch.conf is read or re-read). = Make the nsdispatch(3) core thread-safe. = New status code for nsdispatch(3) `NS_RETURN', currently used to signal ERANGE-type issues. = syslog(3) problems, don't warn/err/abort. = Try harder to avoid namespace pollution. = Implement some shims to assist in porting NSS modules written for the GNU C Library nsswitch interface. Sponsored by: DARPA, Network Associates Laboratories
81 lines
2.9 KiB
C
81 lines
2.9 KiB
C
/*-
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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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* $FreeBSD$
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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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typedef int _##name##_bmVjdGFy
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#endif /* _NSS_TLS_H_ */
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