crypto/threads_none.c

   1 /*
   2  * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <openssl/crypto.h>
  11
  12 #if !defined(OPENSSL_THREADS) || defined(CRYPTO_TDEBUG)
  13
  14 CRYPTO_RWLOCK *CRYPTO_THREAD_lock_new(void)
  15 {
  16     CRYPTO_RWLOCK *lock = OPENSSL_zalloc(sizeof(unsigned int));
  17     if (lock == NULL)
  18         return NULL;
  19
  20     *(unsigned int *)lock = 1;
  21
  22     return lock;
  23 }
  24
  25 int CRYPTO_THREAD_read_lock(CRYPTO_RWLOCK *lock)
  26 {
  27     OPENSSL_assert(*(unsigned int *)lock == 1);
  28     return 1;
  29 }
  30
  31 int CRYPTO_THREAD_write_lock(CRYPTO_RWLOCK *lock)
  32 {
  33     OPENSSL_assert(*(unsigned int *)lock == 1);
  34     return 1;
  35 }
  36
  37 int CRYPTO_THREAD_unlock(CRYPTO_RWLOCK *lock)
  38 {
  39     OPENSSL_assert(*(unsigned int *)lock == 1);
  40     return 1;
  41 }
  42
  43 void CRYPTO_THREAD_lock_free(CRYPTO_RWLOCK *lock) {
  44     if (lock == NULL)
  45         return;
  46
  47     *(unsigned int *)lock = 0;
  48     OPENSSL_free(lock);
  49
  50     return;
  51 }
  52
  53 int CRYPTO_THREAD_run_once(CRYPTO_ONCE *once, void (*init)(void))
  54 {
  55     if (*once != 0)
  56         return 1;
  57
  58     init();
  59     *once = 1;
  60
  61     return 1;
  62 }
  63
  64 #define OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX 256
  65
  66 static void *thread_local_storage[OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX];
  67
  68 int CRYPTO_THREAD_init_local(CRYPTO_THREAD_LOCAL *key, void (*cleanup)(void *))
  69 {
  70     static unsigned int thread_local_key = 0;
  71
  72     if (thread_local_key >= OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX)
  73         return 0;
  74
  75     *key = thread_local_key++;
  76
  77     thread_local_storage[*key] = NULL;
  78
  79     return 1;
  80 }
  81
  82 void *CRYPTO_THREAD_get_local(CRYPTO_THREAD_LOCAL *key)
  83 {
  84     if (*key >= OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX)
  85         return NULL;
  86
  87     return thread_local_storage[*key];
  88 }
  89
  90 int CRYPTO_THREAD_set_local(CRYPTO_THREAD_LOCAL *key, void *val)
  91 {
  92     if (*key >= OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX)
  93         return 0;
  94
  95     thread_local_storage[*key] = val;
  96
  97     return 1;
  98 }
  99
 100 int CRYPTO_THREAD_cleanup_local(CRYPTO_THREAD_LOCAL *key)
 101 {
 102     *key = OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX + 1;
 103     return 1;
 104 }
 105
 106 CRYPTO_THREAD_ID CRYPTO_THREAD_get_current_id(void)
 107 {
 108     return 0;
 109 }
 110
 111 int CRYPTO_THREAD_compare_id(CRYPTO_THREAD_ID a, CRYPTO_THREAD_ID b)
 112 {
 113     return (a == b);
 114 }
 115
 116 int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock)
 117 {
 118     *val += amount;
 119     *ret  = *val;
 120
 121     return 1;
 122 }
 123
 124 #endif