1/*
2 * Copyright (c) 1997 - 2001, 2003, 2006 Kungliga Tekniska Högskolan
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 "gsskrb5_locl.h"
35
36static HEIMDAL_MUTEX context_mutex = HEIMDAL_MUTEX_INITIALIZER;
37static int created_key;
38static HEIMDAL_thread_key context_key;
39
40static void
41destroy_context(void *ptr)
42{
43    krb5_context context = ptr;
44
45    if (context == NULL)
46	return;
47    krb5_free_context(context);
48}
49
50krb5_error_code
51_gsskrb5_init (krb5_context *context)
52{
53    krb5_error_code ret = 0;
54
55    HEIMDAL_MUTEX_lock(&context_mutex);
56
57    if (!created_key) {
58	HEIMDAL_key_create(&context_key, destroy_context, ret);
59	if (ret) {
60	    HEIMDAL_MUTEX_unlock(&context_mutex);
61	    return ret;
62	}
63	created_key = 1;
64    }
65    HEIMDAL_MUTEX_unlock(&context_mutex);
66
67    *context = HEIMDAL_getspecific(context_key);
68    if (*context == NULL) {
69
70	ret = krb5_init_context(context);
71	if (ret == 0) {
72	    HEIMDAL_setspecific(context_key, *context, ret);
73	    if (ret) {
74		krb5_free_context(*context);
75		*context = NULL;
76	    }
77	}
78    }
79
80    return ret;
81}
82