1 /* 2 * Copyright (c) 1997 - 2001, 2003, 2006 Kungliga Tekniska H�gskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include "krb5/gsskrb5_locl.h" 35 36 RCSID("$Id: init.c 19031 2006-11-13 18:02:57Z lha $"); 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