1 /* ====================================================================
2 * Copyright (c) 2016 The OpenSSL Project. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in
13 * the documentation and/or other materials provided with the
16 * 3. All advertising materials mentioning features or use of this
17 * software must display the following acknowledgment:
18 * "This product includes software developed by the OpenSSL Project
19 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
21 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
22 * endorse or promote products derived from this software without
23 * prior written permission. For written permission, please contact
24 * openssl-core@openssl.org.
26 * 5. Products derived from this software may not be called "OpenSSL"
27 * nor may "OpenSSL" appear in their names without prior written
28 * permission of the OpenSSL Project.
30 * 6. Redistributions of any form whatsoever must retain the following
32 * "This product includes software developed by the OpenSSL Project
33 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
35 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
36 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
37 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
38 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
41 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
42 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
44 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
45 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
46 * OF THE POSSIBILITY OF SUCH DAMAGE.
47 * ====================================================================
50 #include <openssl/crypto.h>
52 #if defined(OPENSSL_THREADS) && !defined(CRYPTO_TDEBUG) && defined(OPENSSL_SYS_WINDOWS)
54 CRYPTO_RWLOCK *CRYPTO_THREAD_lock_new(void)
56 CRYPTO_RWLOCK *lock = OPENSSL_zalloc(sizeof(CRITICAL_SECTION));
60 /* 0x400 is the spin count value suggested in the documentation */
61 if (!InitializeCriticalSectionAndSpinCount(lock, 0x400)) {
69 int CRYPTO_THREAD_read_lock(CRYPTO_RWLOCK *lock)
71 EnterCriticalSection(lock);
75 int CRYPTO_THREAD_write_lock(CRYPTO_RWLOCK *lock)
77 EnterCriticalSection(lock);
81 int CRYPTO_THREAD_unlock(CRYPTO_RWLOCK *lock)
83 LeaveCriticalSection(lock);
87 void CRYPTO_THREAD_lock_free(CRYPTO_RWLOCK *lock)
92 DeleteCriticalSection(lock);
98 # if _WIN32_WINNT < 0x0600
100 # define ONCE_UNINITED 0
101 # define ONCE_ININIT 1
104 int CRYPTO_THREAD_run_once(CRYPTO_ONCE *once, void (*init)(void))
106 LONG volatile *lock = (LONG *)once;
109 if (*lock == ONCE_DONE)
113 result = InterlockedCompareExchange(lock, ONCE_ININIT, ONCE_UNINITED);
114 if (result == ONCE_UNINITED) {
119 } while (result == ONCE_ININIT);
121 return (*lock == ONCE_DONE);
126 BOOL CALLBACK once_cb(PINIT_ONCE once, PVOID p, PVOID *pp)
128 void (*init)(void) = p;
135 int CRYPTO_THREAD_run_once(CRYPTO_ONCE *once, void (*init)(void))
137 if (InitOnceExecuteOnce(once, once_cb, init, NULL))
145 int CRYPTO_THREAD_init_local(CRYPTO_THREAD_LOCAL *key, void (*cleanup)(void *))
148 if (*key == TLS_OUT_OF_INDEXES)
154 void *CRYPTO_THREAD_get_local(CRYPTO_THREAD_LOCAL *key)
156 return TlsGetValue(*key);
159 int CRYPTO_THREAD_set_local(CRYPTO_THREAD_LOCAL *key, void *val)
161 if (TlsSetValue(*key, val) == 0)
167 int CRYPTO_THREAD_cleanup_local(CRYPTO_THREAD_LOCAL *key)
169 if (TlsFree(*key) == 0)
175 CRYPTO_THREAD_ID CRYPTO_THREAD_get_current_id(void)
177 return GetCurrentThreadId();
180 int CRYPTO_THREAD_compare_id(CRYPTO_THREAD_ID a, CRYPTO_THREAD_ID b)
185 int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock)
187 *ret = InterlockedExchangeAdd(val, amount) + amount;