crypto/threads_none.c

   1 /* ====================================================================
   2  * Copyright (c) 2016 The OpenSSL Project.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  *
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in
  13  *    the documentation and/or other materials provided with the
  14  *    distribution.
  15  *
  16  * 3. All advertising materials mentioning features or use of this
  17  *    software must display the following acknowledgment:
  18  *    "This product includes software developed by the OpenSSL Project
  19  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  20  *
  21  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  22  *    endorse or promote products derived from this software without
  23  *    prior written permission. For written permission, please contact
  24  *    openssl-core@openssl.org.
  25  *
  26  * 5. Products derived from this software may not be called "OpenSSL"
  27  *    nor may "OpenSSL" appear in their names without prior written
  28  *    permission of the OpenSSL Project.
  29  *
  30  * 6. Redistributions of any form whatsoever must retain the following
  31  *    acknowledgment:
  32  *    "This product includes software developed by the OpenSSL Project
  33  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  34  *
  35  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  36  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  37  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  38  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  39  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  40  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  41  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  42  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  43  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  44  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  45  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  46  * OF THE POSSIBILITY OF SUCH DAMAGE.
  47  * ====================================================================
  48  */
  49
  50 #include <openssl/crypto.h>
  51 #include "internal/threads.h"
  52
  53 #if !defined(OPENSSL_THREADS) || defined(CRYPTO_TDEBUG)
  54
  55 CRYPTO_RWLOCK *CRYPTO_THREAD_lock_new(void)
  56 {
  57     CRYPTO_RWLOCK *lock = OPENSSL_zalloc(sizeof(unsigned int));
  58     if (lock == NULL)
  59         return NULL;
  60
  61     *(unsigned int *)lock = 1;
  62
  63     return lock;
  64 }
  65
  66 int CRYPTO_THREAD_read_lock(CRYPTO_RWLOCK *lock)
  67 {
  68     OPENSSL_assert(*(unsigned int *)lock == 1);
  69     return 1;
  70 }
  71
  72 int CRYPTO_THREAD_write_lock(CRYPTO_RWLOCK *lock)
  73 {
  74     OPENSSL_assert(*(unsigned int *)lock == 1);
  75     return 1;
  76 }
  77
  78 int CRYPTO_THREAD_unlock(CRYPTO_RWLOCK *lock)
  79 {
  80     OPENSSL_assert(*(unsigned int *)lock == 1);
  81     return 1;
  82 }
  83
  84 void CRYPTO_THREAD_lock_free(CRYPTO_RWLOCK *lock) {
  85     if (lock == NULL)
  86         return;
  87
  88     *(unsigned int *)lock = 0;
  89     OPENSSL_free(lock);
  90
  91     return;
  92 }
  93
  94 int CRYPTO_THREAD_run_once(CRYPTO_ONCE *once, void (*init)(void))
  95 {
  96     if (*once != 0)
  97         return 1;
  98
  99     init();
 100     *once = 1;
 101
 102     return 1;
 103 }
 104
 105 #define OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX 256
 106
 107 static void *thread_local_storage[OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX];
 108
 109 int CRYPTO_THREAD_init_local(CRYPTO_THREAD_LOCAL *key, void (*cleanup)(void *))
 110 {
 111     static unsigned int thread_local_key = 0;
 112
 113     if (thread_local_key >= OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX)
 114         return 0;
 115
 116     *key = thread_local_key++;
 117
 118     thread_local_storage[*key] = NULL;
 119
 120     return 1;
 121 }
 122
 123 void *CRYPTO_THREAD_get_local(CRYPTO_THREAD_LOCAL *key)
 124 {
 125     if (*key >= OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX)
 126         return NULL;
 127
 128     return thread_local_storage[*key];
 129 }
 130
 131 int CRYPTO_THREAD_set_local(CRYPTO_THREAD_LOCAL *key, void *val)
 132 {
 133     if (*key >= OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX)
 134         return 0;
 135
 136     thread_local_storage[*key] = val;
 137
 138     return 1;
 139 }
 140
 141 int CRYPTO_THREAD_cleanup_local(CRYPTO_THREAD_LOCAL *key)
 142 {
 143     *key = OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX + 1;
 144     return 1;
 145 }
 146
 147 CRYPTO_THREAD_ID CRYPTO_THREAD_get_current_id(void)
 148 {
 149     return 0;
 150 }
 151
 152 int CRYPTO_THREAD_compare_id(CRYPTO_THREAD_ID a, CRYPTO_THREAD_ID b)
 153 {
 154     return (a == b);
 155 }
 156
 157 int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock)
 158 {
 159     *val += amount;
 160     *ret  = *val;
 161
 162     return 1;
 163 }
 164
 165 #endif