[331] | 1 | /*
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| 2 | * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <openssl/crypto.h>
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| 11 |
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| 12 | #if defined(OPENSSL_THREADS) && !defined(CRYPTO_TDEBUG) && !defined(OPENSSL_SYS_WINDOWS)
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| 13 |
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| 14 | # ifdef PTHREAD_RWLOCK_INITIALIZER
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| 15 | # define USE_RWLOCK
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| 16 | # endif
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| 17 |
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| 18 | CRYPTO_RWLOCK *CRYPTO_THREAD_lock_new(void)
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| 19 | {
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| 20 | # ifdef USE_RWLOCK
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| 21 | CRYPTO_RWLOCK *lock = OPENSSL_zalloc(sizeof(pthread_rwlock_t));
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| 22 | if (lock == NULL)
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| 23 | return NULL;
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| 24 |
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| 25 | if (pthread_rwlock_init(lock, NULL) != 0) {
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| 26 | OPENSSL_free(lock);
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| 27 | return NULL;
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| 28 | }
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| 29 | # else
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| 30 | pthread_mutexattr_t attr;
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| 31 | CRYPTO_RWLOCK *lock = OPENSSL_zalloc(sizeof(pthread_mutex_t));
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| 32 | if (lock == NULL)
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| 33 | return NULL;
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| 34 |
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| 35 | pthread_mutexattr_init(&attr);
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| 36 | pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
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| 37 |
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| 38 | if (pthread_mutex_init(lock, &attr) != 0) {
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| 39 | pthread_mutexattr_destroy(&attr);
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| 40 | OPENSSL_free(lock);
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| 41 | return NULL;
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| 42 | }
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| 43 |
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| 44 | pthread_mutexattr_destroy(&attr);
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| 45 | # endif
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| 46 |
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| 47 | return lock;
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| 48 | }
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| 49 |
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| 50 | int CRYPTO_THREAD_read_lock(CRYPTO_RWLOCK *lock)
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| 51 | {
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| 52 | # ifdef USE_RWLOCK
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| 53 | if (pthread_rwlock_rdlock(lock) != 0)
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| 54 | return 0;
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| 55 | # else
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| 56 | if (pthread_mutex_lock(lock) != 0)
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| 57 | return 0;
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| 58 | # endif
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| 59 |
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| 60 | return 1;
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| 61 | }
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| 62 |
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| 63 | int CRYPTO_THREAD_write_lock(CRYPTO_RWLOCK *lock)
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| 64 | {
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| 65 | # ifdef USE_RWLOCK
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| 66 | if (pthread_rwlock_wrlock(lock) != 0)
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| 67 | return 0;
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| 68 | # else
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| 69 | if (pthread_mutex_lock(lock) != 0)
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| 70 | return 0;
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| 71 | # endif
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| 72 |
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| 73 | return 1;
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| 74 | }
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| 75 |
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| 76 | int CRYPTO_THREAD_unlock(CRYPTO_RWLOCK *lock)
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| 77 | {
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| 78 | # ifdef USE_RWLOCK
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| 79 | if (pthread_rwlock_unlock(lock) != 0)
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| 80 | return 0;
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| 81 | # else
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| 82 | if (pthread_mutex_unlock(lock) != 0)
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| 83 | return 0;
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| 84 | # endif
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| 85 |
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| 86 | return 1;
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| 87 | }
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| 88 |
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| 89 | void CRYPTO_THREAD_lock_free(CRYPTO_RWLOCK *lock)
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| 90 | {
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| 91 | if (lock == NULL)
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| 92 | return;
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| 93 |
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| 94 | # ifdef USE_RWLOCK
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| 95 | pthread_rwlock_destroy(lock);
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| 96 | # else
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| 97 | pthread_mutex_destroy(lock);
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| 98 | # endif
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| 99 | OPENSSL_free(lock);
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| 100 |
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| 101 | return;
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| 102 | }
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| 103 |
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| 104 | int CRYPTO_THREAD_run_once(CRYPTO_ONCE *once, void (*init)(void))
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| 105 | {
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| 106 | if (pthread_once(once, init) != 0)
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| 107 | return 0;
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| 108 |
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| 109 | return 1;
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| 110 | }
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| 111 |
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| 112 | int CRYPTO_THREAD_init_local(CRYPTO_THREAD_LOCAL *key, void (*cleanup)(void *))
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| 113 | {
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| 114 | if (pthread_key_create(key, cleanup) != 0)
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| 115 | return 0;
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| 116 |
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| 117 | return 1;
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| 118 | }
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| 119 |
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| 120 | void *CRYPTO_THREAD_get_local(CRYPTO_THREAD_LOCAL *key)
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| 121 | {
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| 122 | return pthread_getspecific(*key);
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| 123 | }
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| 124 |
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| 125 | int CRYPTO_THREAD_set_local(CRYPTO_THREAD_LOCAL *key, void *val)
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| 126 | {
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| 127 | if (pthread_setspecific(*key, val) != 0)
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| 128 | return 0;
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| 129 |
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| 130 | return 1;
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| 131 | }
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| 132 |
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| 133 | int CRYPTO_THREAD_cleanup_local(CRYPTO_THREAD_LOCAL *key)
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| 134 | {
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| 135 | if (pthread_key_delete(*key) != 0)
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| 136 | return 0;
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| 137 |
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| 138 | return 1;
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| 139 | }
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| 140 |
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| 141 | CRYPTO_THREAD_ID CRYPTO_THREAD_get_current_id(void)
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| 142 | {
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| 143 | return pthread_self();
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| 144 | }
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| 145 |
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| 146 | int CRYPTO_THREAD_compare_id(CRYPTO_THREAD_ID a, CRYPTO_THREAD_ID b)
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| 147 | {
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| 148 | return pthread_equal(a, b);
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| 149 | }
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| 150 |
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| 151 | int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock)
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| 152 | {
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| 153 | # if defined(__GNUC__) && defined(__ATOMIC_ACQ_REL)
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| 154 | if (__atomic_is_lock_free(sizeof(*val), val)) {
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| 155 | *ret = __atomic_add_fetch(val, amount, __ATOMIC_ACQ_REL);
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| 156 | return 1;
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| 157 | }
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| 158 | # endif
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| 159 | if (!CRYPTO_THREAD_write_lock(lock))
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| 160 | return 0;
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| 161 |
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| 162 | *val += amount;
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| 163 | *ret = *val;
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| 164 |
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| 165 | if (!CRYPTO_THREAD_unlock(lock))
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| 166 | return 0;
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| 167 |
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| 168 | return 1;
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| 169 | }
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| 170 |
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| 171 | #endif
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