1 /* $NetBSD: init.c,v 1.1.1.1 2011/04/13 18:14:45 elric Exp $ */ 2 3 /* 4 * Copyright (c) 1997 - 2001, 2003, 2006 Kungliga Tekniska Högskolan 5 * (Royal Institute of Technology, Stockholm, Sweden). 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * 3. Neither the name of the Institute nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include "gsskrb5_locl.h" 37 38 static HEIMDAL_MUTEX context_mutex = HEIMDAL_MUTEX_INITIALIZER; 39 static int created_key; 40 static HEIMDAL_thread_key context_key; 41 42 static void 43 destroy_context(void *ptr) 44 { 45 krb5_context context = ptr; 46 47 if (context == NULL) 48 return; 49 krb5_free_context(context); 50 } 51 52 krb5_error_code 53 _gsskrb5_init (krb5_context *context) 54 { 55 krb5_error_code ret = 0; 56 57 HEIMDAL_MUTEX_lock(&context_mutex); 58 59 if (!created_key) { 60 HEIMDAL_key_create(&context_key, destroy_context, ret); 61 if (ret) { 62 HEIMDAL_MUTEX_unlock(&context_mutex); 63 return ret; 64 } 65 created_key = 1; 66 } 67 HEIMDAL_MUTEX_unlock(&context_mutex); 68 69 *context = HEIMDAL_getspecific(context_key); 70 if (*context == NULL) { 71 72 ret = krb5_init_context(context); 73 if (ret == 0) { 74 HEIMDAL_setspecific(context_key, *context, ret); 75 if (ret) { 76 krb5_free_context(*context); 77 *context = NULL; 78 } 79 } 80 } 81 82 return ret; 83 } 84