crypto/threads_none.c

   1 /*
   2  * Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (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;
  18
  19     if ((lock = OPENSSL_zalloc(sizeof(unsigned int))) == NULL) {
  20         /* Don't set error, to avoid recursion blowup. */
  21         return NULL;
  22     }
  23
  24     *(unsigned int *)lock = 1;
  25
  26     return lock;
  27 }
  28
  29 int CRYPTO_THREAD_read_lock(CRYPTO_RWLOCK *lock)
  30 {
  31     if (!ossl_assert(*(unsigned int *)lock == 1))
  32         return 0;
  33     return 1;
  34 }
  35
  36 int CRYPTO_THREAD_write_lock(CRYPTO_RWLOCK *lock)
  37 {
  38     if (!ossl_assert(*(unsigned int *)lock == 1))
  39         return 0;
  40     return 1;
  41 }
  42
  43 int CRYPTO_THREAD_unlock(CRYPTO_RWLOCK *lock)
  44 {
  45     if (!ossl_assert(*(unsigned int *)lock == 1))
  46         return 0;
  47     return 1;
  48 }
  49
  50 void CRYPTO_THREAD_lock_free(CRYPTO_RWLOCK *lock) {
  51     if (lock == NULL)
  52         return;
  53
  54     *(unsigned int *)lock = 0;
  55     OPENSSL_free(lock);
  56
  57     return;
  58 }
  59
  60 int CRYPTO_THREAD_run_once(CRYPTO_ONCE *once, void (*init)(void))
  61 {
  62     if (*once != 0)
  63         return 1;
  64
  65     init();
  66     *once = 1;
  67
  68     return 1;
  69 }
  70
  71 #define OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX 256
  72
  73 static void *thread_local_storage[OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX];
  74
  75 int CRYPTO_THREAD_init_local(CRYPTO_THREAD_LOCAL *key, void (*cleanup)(void *))
  76 {
  77     static unsigned int thread_local_key = 0;
  78
  79     if (thread_local_key >= OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX)
  80         return 0;
  81
  82     *key = thread_local_key++;
  83
  84     thread_local_storage[*key] = NULL;
  85
  86     return 1;
  87 }
  88
  89 void *CRYPTO_THREAD_get_local(CRYPTO_THREAD_LOCAL *key)
  90 {
  91     if (*key >= OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX)
  92         return NULL;
  93
  94     return thread_local_storage[*key];
  95 }
  96
  97 int CRYPTO_THREAD_set_local(CRYPTO_THREAD_LOCAL *key, void *val)
  98 {
  99     if (*key >= OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX)
 100         return 0;
 101
 102     thread_local_storage[*key] = val;
 103
 104     return 1;
 105 }
 106
 107 int CRYPTO_THREAD_cleanup_local(CRYPTO_THREAD_LOCAL *key)
 108 {
 109     *key = OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX + 1;
 110     return 1;
 111 }
 112
 113 CRYPTO_THREAD_ID CRYPTO_THREAD_get_current_id(void)
 114 {
 115     return 0;
 116 }
 117
 118 int CRYPTO_THREAD_compare_id(CRYPTO_THREAD_ID a, CRYPTO_THREAD_ID b)
 119 {
 120     return (a == b);
 121 }
 122
 123 int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock)
 124 {
 125     *val += amount;
 126     *ret  = *val;
 127
 128     return 1;
 129 }
 130
 131 int openssl_init_fork_handlers(void)
 132 {
 133     return 0;
 134 }
 135
 136 #endif