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