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Diffstat (limited to 'demos/threads/th-lock.c')
| -rw-r--r-- | demos/threads/th-lock.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/demos/threads/th-lock.c b/demos/threads/th-lock.c new file mode 100644 index 0000000000..dc58cb2e09 --- /dev/null +++ b/demos/threads/th-lock.c @@ -0,0 +1,194 @@ +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) + * All rights reserved. + * + * This package is an SSL implementation written + * by Eric Young (eay@cryptsoft.com). + * The implementation was written so as to conform with Netscapes SSL. + * + * This library is free for commercial and non-commercial use as long as + * the following conditions are aheared to. The following conditions + * apply to all code found in this distribution, be it the RC4, RSA, + * lhash, DES, etc., code; not just the SSL code. The SSL documentation + * included with this distribution is covered by the same copyright terms + * except that the holder is Tim Hudson (tjh@cryptsoft.com). + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. + * If this package is used in a product, Eric Young should be given attribution + * as the author of the parts of the library used. + * This can be in the form of a textual message at program startup or + * in documentation (online or textual) provided with the package. + * + * 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 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 acknowledgement: + * "This product includes cryptographic software written by + * Eric Young (eay@cryptsoft.com)" + * The word 'cryptographic' can be left out if the rouines from the library + * being used are not cryptographic related :-). + * 4. If you include any Windows specific code (or a derivative thereof) from + * the apps directory (application code) you must include an acknowledgement: + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" + * + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND + * ANY EXPRESS 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 AUTHOR OR 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. + * + * The licence and distribution terms for any publically available version or + * derivative of this code cannot be changed. i.e. this code cannot simply be + * copied and put under another distribution licence + * [including the GNU Public Licence.] + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <errno.h> +#ifdef LINUX +# include <typedefs.h> +#endif +#ifdef OPENSSL_SYS_WIN32 +# include <windows.h> +#endif +#ifdef PTHREADS +# include <pthread.h> +#endif +#include <openssl/lhash.h> +#include <openssl/crypto.h> +#include <openssl/buffer.h> +#include "../../e_os.h" +#include <openssl/x509.h> +#include <openssl/ssl.h> +#include <openssl/err.h> + +void CRYPTO_thread_setup(void); +void CRYPTO_thread_cleanup(void); + +static void win32_locking_callback(int mode, int type, char *file, int line); +static void pthreads_locking_callback(int mode, int type, char *file, int line); +static unsigned long pthreads_thread_id(void); + +/*- + * usage: + * CRYPTO_thread_setup(); + * application code + * CRYPTO_thread_cleanup(); + */ + +#ifdef OPENSSL_SYS_WIN32 + +static HANDLE *lock_cs; + +void CRYPTO_thread_setup(void) +{ + int i; + + lock_cs = OPENSSL_malloc(CRYPTO_num_locks() * sizeof(HANDLE)); + if (!lock_cs) { + /* Nothing we can do about this...void function! */ + return; + } + for (i = 0; i < CRYPTO_num_locks(); i++) { + lock_cs[i] = CreateMutex(NULL, FALSE, NULL); + } + + CRYPTO_set_locking_callback((void (*)(int, int, char *, int)) + win32_locking_callback); + /* id callback defined */ + return (1); +} + +static void CRYPTO_thread_cleanup(void) +{ + int i; + + CRYPTO_set_locking_callback(NULL); + for (i = 0; i < CRYPTO_num_locks(); i++) + CloseHandle(lock_cs[i]); + OPENSSL_free(lock_cs); +} + +void win32_locking_callback(int mode, int type, char *file, int line) +{ + if (mode & CRYPTO_LOCK) { + WaitForSingleObject(lock_cs[type], INFINITE); + } else { + ReleaseMutex(lock_cs[type]); + } +} + +#endif /* OPENSSL_SYS_WIN32 */ + +/* Linux and a few others */ +#ifdef PTHREADS + +static pthread_mutex_t *lock_cs; +static long *lock_count; + +void CRYPTO_thread_setup(void) +{ + int i; + + lock_cs = OPENSSL_malloc(CRYPTO_num_locks() * sizeof(pthread_mutex_t)); + lock_count = OPENSSL_malloc(CRYPTO_num_locks() * sizeof(long)); + if (!lock_cs || !lock_count) { + /* Nothing we can do about this...void function! */ + OPENSSL_free(lock_cs); + OPENSSL_free(lock_count); + return; + } + for (i = 0; i < CRYPTO_num_locks(); i++) { + lock_count[i] = 0; + pthread_mutex_init(&(lock_cs[i]), NULL); + } + + CRYPTO_set_id_callback((unsigned long (*)())pthreads_thread_id); + CRYPTO_set_locking_callback((void (*)())pthreads_locking_callback); +} + +void thread_cleanup(void) +{ + int i; + + CRYPTO_set_locking_callback(NULL); + for (i = 0; i < CRYPTO_num_locks(); i++) { + pthread_mutex_destroy(&(lock_cs[i])); + } + OPENSSL_free(lock_cs); + OPENSSL_free(lock_count); +} + +void pthreads_locking_callback(int mode, int type, char *file, int line) +{ + if (mode & CRYPTO_LOCK) { + pthread_mutex_lock(&(lock_cs[type])); + lock_count[type]++; + } else { + pthread_mutex_unlock(&(lock_cs[type])); + } +} + +unsigned long pthreads_thread_id(void) +{ + unsigned long ret; + + ret = (unsigned long)pthread_self(); + return (ret); +} + +#endif /* PTHREADS */ |