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 #include "internal/cryptlib.h"
  12
  13 #if !defined(OPENSSL_THREADS) || defined(CRYPTO_TDEBUG)
  14
  15 CRYPTO_RWLOCK *CRYPTO_THREAD_lock_new(void)
  16 {
  17     CRYPTO_RWLOCK *lock = OPENSSL_zalloc(sizeof(unsigned int));
  18     if (lock == NULL)
  19         return NULL;
  20
  21     *(unsigned int *)lock = 1;
  22
  23     return lock;
  24 }
  25
  26 int CRYPTO_THREAD_read_lock(CRYPTO_RWLOCK *lock)
  27 {
  28     if (!ossl_assert(*(unsigned int *)lock == 1))
  29         return 0;
  30     return 1;
  31 }
  32
  33 int CRYPTO_THREAD_write_lock(CRYPTO_RWLOCK *lock)
  34 {
  35     if (!ossl_assert(*(unsigned int *)lock == 1))
  36         return 0;
  37     return 1;
  38 }
  39
  40 int CRYPTO_THREAD_unlock(CRYPTO_RWLOCK *lock)
  41 {
  42     if (!ossl_assert(*(unsigned int *)lock == 1))
  43         return 0;
  44     return 1;
  45 }
  46
  47 void CRYPTO_THREAD_lock_free(CRYPTO_RWLOCK *lock) {
  48     if (lock == NULL)
  49         return;
  50
  51     *(unsigned int *)lock = 0;
  52     OPENSSL_free(lock);
  53
  54     return;
  55 }
  56
  57 int CRYPTO_THREAD_run_once(CRYPTO_ONCE *once, void (*init)(void))
  58 {
  59     if (*once != 0)
  60         return 1;
  61
  62     init();
  63     *once = 1;
  64
  65     return 1;
  66 }
  67
  68 #define OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX 256
  69
  70 static void *thread_local_storage[OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX];
  71
  72 int CRYPTO_THREAD_init_local(CRYPTO_THREAD_LOCAL *key, void (*cleanup)(void *))
  73 {
  74     static unsigned int thread_local_key = 0;
  75
  76     if (thread_local_key >= OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX)
  77         return 0;
  78
  79     *key = thread_local_key++;
  80
  81     thread_local_storage[*key] = NULL;
  82
  83     return 1;
  84 }
  85
  86 void *CRYPTO_THREAD_get_local(CRYPTO_THREAD_LOCAL *key)
  87 {
  88     if (*key >= OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX)
  89         return NULL;
  90
  91     return thread_local_storage[*key];
  92 }
  93
  94 int CRYPTO_THREAD_set_local(CRYPTO_THREAD_LOCAL *key, void *val)
  95 {
  96     if (*key >= OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX)
  97         return 0;
  98
  99     thread_local_storage[*key] = val;
 100
 101     return 1;
 102 }
 103
 104 int CRYPTO_THREAD_cleanup_local(CRYPTO_THREAD_LOCAL *key)
 105 {
 106     *key = OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX + 1;
 107     return 1;
 108 }
 109
 110 CRYPTO_THREAD_ID CRYPTO_THREAD_get_current_id(void)
 111 {
 112     return 0;
 113 }
 114
 115 int CRYPTO_THREAD_compare_id(CRYPTO_THREAD_ID a, CRYPTO_THREAD_ID b)
 116 {
 117     return (a == b);
 118 }
 119
 120 int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock)
 121 {
 122     *val += amount;
 123     *ret  = *val;
 124
 125     return 1;
 126 }
 127
 128 int openssl_init_fork_handlers(void)
 129 {
 130     return 0;
 131 }
 132
 133 #endif