diff options
author | Alessandro Ghedini <alessandro@ghedini.me> | 2015-10-25 17:43:55 +0100 |
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committer | Matt Caswell <matt@openssl.org> | 2016-02-26 10:00:36 +0000 |
commit | 71a04cfca03bf6d5a93ad3ffd23e0fb9e0da2919 (patch) | |
tree | f0c49fffc439de585b85ad95f94ebfd50fafce90 /crypto/threads_win.c | |
parent | bdcd83e1272c84f3de576f793ba03fdc2c21a557 (diff) |
Implement new multi-threading API
Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
Diffstat (limited to 'crypto/threads_win.c')
-rw-r--r-- | crypto/threads_win.c | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/crypto/threads_win.c b/crypto/threads_win.c new file mode 100644 index 0000000000..bee628ff81 --- /dev/null +++ b/crypto/threads_win.c @@ -0,0 +1,190 @@ +/* ==================================================================== + * Copyright (c) 2016 The OpenSSL Project. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * openssl-core@openssl.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.openssl.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * ==================================================================== + */ + +#include <openssl/crypto.h> +#include "internal/threads.h" + +#if defined(OPENSSL_THREADS) && !defined(CRYPTO_TDEBUG) && defined(OPENSSL_SYS_WINDOWS) + +CRYPTO_RWLOCK *CRYPTO_THREAD_lock_new(void) +{ + CRYPTO_RWLOCK *lock = OPENSSL_zalloc(sizeof(CRITICAL_SECTION)); + if (lock == NULL) + return NULL; + + /* 0x400 is the spin count value suggested in the documentation */ + if (!InitializeCriticalSectionAndSpinCount(lock, 0x400)) + return NULL; + + return lock; +} + +int CRYPTO_THREAD_read_lock(CRYPTO_RWLOCK *lock) +{ + EnterCriticalSection(lock); + return 1; +} + +int CRYPTO_THREAD_write_lock(CRYPTO_RWLOCK *lock) +{ + EnterCriticalSection(lock); + return 1; +} + +int CRYPTO_THREAD_unlock(CRYPTO_RWLOCK *lock) +{ + LeaveCriticalSection(lock); + return 1; +} + +void CRYPTO_THREAD_lock_free(CRYPTO_RWLOCK *lock) +{ + if (lock == NULL) + return; + + DeleteCriticalSection(lock); + OPENSSL_free(lock); + + return; +} + +# if _WIN32_WINNT < 0x0600 + +# define ONCE_UNINITED 0 +# define ONCE_ININIT 1 +# define ONCE_DONE 2 + +int CRYPTO_THREAD_run_once(CRYPTO_ONCE *once, void (*init)(void)) +{ + LONG volatile *lock = (LONG *)once; + LONG result; + + if (*lock == ONCE_DONE) + return 1; + + do { + result = InterlockedCompareExchange(lock, ONCE_ININIT, ONCE_UNINITED); + if (result == ONCE_UNINITED) { + init(); + *lock = ONCE_DONE; + return 1; + } + } while (result == ONCE_ININIT); + + return (*lock == ONCE_DONE); +} + +# else + +BOOL CALLBACK once_cb(PINIT_ONCE once, PVOID p, PVOID *pp) +{ + void (*init)(void) = p; + + init(); + + return TRUE; +} + +void CRYPTO_THREAD_run_once(CRYPTO_ONCE *once, void (*init)(void)) +{ + if (InitOnceExecuteOnce(once, once_cb, init, NULL)) + return 0; + + return 1; +} + +# endif + +int CRYPTO_THREAD_init_local(CRYPTO_THREAD_LOCAL *key, void (*cleanup)(void *)) +{ + *key = TlsAlloc(); + if (*key == TLS_OUT_OF_INDEXES) + return 0; + + return 1; +} + +void *CRYPTO_THREAD_get_local(CRYPTO_THREAD_LOCAL *key) +{ + return TlsGetValue(*key); +} + +int CRYPTO_THREAD_set_local(CRYPTO_THREAD_LOCAL *key, void *val) +{ + if (TlsSetValue(*key, val) == 0) + return 0; + + return 1; +} + +int CRYPTO_THREAD_cleanup_local(CRYPTO_THREAD_LOCAL *key) +{ + if (TlsFree(*key) == 0) + return 0; + + return 1; +} + +CRYPTO_THREAD_ID CRYPTO_THREAD_get_current_id(void) +{ + return GetCurrentThreadId(); +} + +int CRYPTO_THREAD_compare_id(CRYPTO_THREAD_ID a, CRYPTO_THREAD_ID b) +{ + return (a == b); +} + +int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock) +{ + *ret = InterlockedExchangeAdd(val, amount) + amount; + return 1; +} + +#endif |