crypto/threads_none.c

   1 /*
   2  * Copyright 2016-2021 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 # if defined(OPENSSL_SYS_UNIX)
  16 #  include <sys/types.h>
  17 #  include <unistd.h>
  18 # endif
  19
  20 CRYPTO_RWLOCK *CRYPTO_THREAD_lock_new(void)
  21 {
  22     CRYPTO_RWLOCK *lock;
  23
  24     if ((lock = OPENSSL_zalloc(sizeof(unsigned int))) == NULL) {
  25         /* Don't set error, to avoid recursion blowup. */
  26         return NULL;
  27     }
  28
  29     *(unsigned int *)lock = 1;
  30
  31     return lock;
  32 }
  33
  34 __owur int CRYPTO_THREAD_read_lock(CRYPTO_RWLOCK *lock)
  35 {
  36     if (!ossl_assert(*(unsigned int *)lock == 1))
  37         return 0;
  38     return 1;
  39 }
  40
  41 __owur int CRYPTO_THREAD_write_lock(CRYPTO_RWLOCK *lock)
  42 {
  43     if (!ossl_assert(*(unsigned int *)lock == 1))
  44         return 0;
  45     return 1;
  46 }
  47
  48 int CRYPTO_THREAD_unlock(CRYPTO_RWLOCK *lock)
  49 {
  50     if (!ossl_assert(*(unsigned int *)lock == 1))
  51         return 0;
  52     return 1;
  53 }
  54
  55 void CRYPTO_THREAD_lock_free(CRYPTO_RWLOCK *lock) {
  56     if (lock == NULL)
  57         return;
  58
  59     *(unsigned int *)lock = 0;
  60     OPENSSL_free(lock);
  61
  62     return;
  63 }
  64
  65 int CRYPTO_THREAD_run_once(CRYPTO_ONCE *once, void (*init)(void))
  66 {
  67     if (*once != 0)
  68         return 1;
  69
  70     init();
  71     *once = 1;
  72
  73     return 1;
  74 }
  75
  76 #define OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX 256
  77
  78 static void *thread_local_storage[OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX];
  79
  80 int CRYPTO_THREAD_init_local(CRYPTO_THREAD_LOCAL *key, void (*cleanup)(void *))
  81 {
  82     static unsigned int thread_local_key = 0;
  83
  84     if (thread_local_key >= OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX)
  85         return 0;
  86
  87     *key = thread_local_key++;
  88
  89     thread_local_storage[*key] = NULL;
  90
  91     return 1;
  92 }
  93
  94 void *CRYPTO_THREAD_get_local(CRYPTO_THREAD_LOCAL *key)
  95 {
  96     if (*key >= OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX)
  97         return NULL;
  98
  99     return thread_local_storage[*key];
 100 }
 101
 102 int CRYPTO_THREAD_set_local(CRYPTO_THREAD_LOCAL *key, void *val)
 103 {
 104     if (*key >= OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX)
 105         return 0;
 106
 107     thread_local_storage[*key] = val;
 108
 109     return 1;
 110 }
 111
 112 int CRYPTO_THREAD_cleanup_local(CRYPTO_THREAD_LOCAL *key)
 113 {
 114     *key = OPENSSL_CRYPTO_THREAD_LOCAL_KEY_MAX + 1;
 115     return 1;
 116 }
 117
 118 CRYPTO_THREAD_ID CRYPTO_THREAD_get_current_id(void)
 119 {
 120     return 0;
 121 }
 122
 123 int CRYPTO_THREAD_compare_id(CRYPTO_THREAD_ID a, CRYPTO_THREAD_ID b)
 124 {
 125     return (a == b);
 126 }
 127
 128 int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock)
 129 {
 130     *val += amount;
 131     *ret  = *val;
 132
 133     return 1;
 134 }
 135
 136 int CRYPTO_atomic_or(uint64_t *val, uint64_t op, uint64_t *ret,
 137                      CRYPTO_RWLOCK *lock)
 138 {
 139     *val |= op;
 140     *ret  = *val;
 141
 142     return 1;
 143 }
 144
 145 int CRYPTO_atomic_load(uint64_t *val, uint64_t *ret, CRYPTO_RWLOCK *lock)
 146 {
 147     *ret  = *val;
 148
 149     return 1;
 150 }
 151
 152 int openssl_init_fork_handlers(void)
 153 {
 154     return 0;
 155 }
 156
 157 int openssl_get_fork_id(void)
 158 {
 159 # if defined(OPENSSL_SYS_UNIX)
 160     return getpid();
 161 # else
 162     return 0;
 163 # endif
 164 }
 165 #endif