1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2003 Networks Associates Technology, Inc. 5 * All rights reserved. 6 * 7 * This software was developed for the FreeBSD Project by 8 * Jacques A. Vidrine, Safeport Network Services, and Network 9 * Associates Laboratories, the Security Research Division of Network 10 * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 11 * ("CBOSS"), as part of the DARPA CHATS research program. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * $FreeBSD$ 35 * 36 * Macros which generate thread local storage handling code in NSS modules. 37 */ 38 #ifndef _NSS_TLS_H_ 39 #define _NSS_TLS_H_ 40 41 #define NSS_TLS_HANDLING(name) \ 42 static pthread_key_t name##_state_key; \ 43 static void name##_keyinit(void); \ 44 static int name##_getstate(struct name##_state **); \ 45 \ 46 static void \ 47 name##_keyinit(void) \ 48 { \ 49 (void)_pthread_key_create(&name##_state_key, name##_endstate); \ 50 } \ 51 \ 52 static int \ 53 name##_getstate(struct name##_state **p) \ 54 { \ 55 static struct name##_state st; \ 56 static pthread_once_t keyinit = PTHREAD_ONCE_INIT; \ 57 int rv; \ 58 \ 59 if (!__isthreaded || _pthread_main_np() != 0) { \ 60 *p = &st; \ 61 return (0); \ 62 } \ 63 rv = _pthread_once(&keyinit, name##_keyinit); \ 64 if (rv != 0) \ 65 return (rv); \ 66 *p = _pthread_getspecific(name##_state_key); \ 67 if (*p != NULL) \ 68 return (0); \ 69 *p = calloc(1, sizeof(**p)); \ 70 if (*p == NULL) \ 71 return (ENOMEM); \ 72 rv = _pthread_setspecific(name##_state_key, *p); \ 73 if (rv != 0) { \ 74 free(*p); \ 75 *p = NULL; \ 76 } \ 77 return (rv); \ 78 } \ 79 /* allow the macro invocation to end with a semicolon */ \ 80 struct _clashproof_bmVjdGFy 81 82 #endif /* _NSS_TLS_H_ */ 83