opensslthreadlock.c
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上传日期:2018-10-23
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- /*****************************************************************************
- * _ _ ____ _
- * Project ___| | | | _ | |
- * / __| | | | |_) | |
- * | (__| |_| | _ <| |___
- * ___|___/|_| ______|
- *
- * $Id: opensslthreadlock.c,v 1.3 2008-09-06 05:29:05 yangtse Exp $
- *
- * Example source code to show one way to set the necessary OpenSSL locking
- * callbacks if you want to do multi-threaded transfers with HTTPS/FTPS with
- * libcurl built to use OpenSSL.
- *
- * This is not a complete stand-alone example.
- *
- * Author: Jeremy Brown
- */
- #include <stdio.h>
- #include <pthread.h>
- #include <openssl/err.h>
- #define MUTEX_TYPE pthread_mutex_t
- #define MUTEX_SETUP(x) pthread_mutex_init(&(x), NULL)
- #define MUTEX_CLEANUP(x) pthread_mutex_destroy(&(x))
- #define MUTEX_LOCK(x) pthread_mutex_lock(&(x))
- #define MUTEX_UNLOCK(x) pthread_mutex_unlock(&(x))
- #define THREAD_ID pthread_self( )
- void handle_error(const char *file, int lineno, const char *msg){
- fprintf(stderr, "** %s:%d %sn", file, lineno, msg);
- ERR_print_errors_fp(stderr);
- /* exit(-1); */
- }
- /* This array will store all of the mutexes available to OpenSSL. */
- static MUTEX_TYPE *mutex_buf= NULL;
- static void locking_function(int mode, int n, const char * file, int line)
- {
- if (mode & CRYPTO_LOCK)
- MUTEX_LOCK(mutex_buf[n]);
- else
- MUTEX_UNLOCK(mutex_buf[n]);
- }
- static unsigned long id_function(void)
- {
- return ((unsigned long)THREAD_ID);
- }
- int thread_setup(void)
- {
- int i;
- mutex_buf = malloc(CRYPTO_num_locks( ) * sizeof(MUTEX_TYPE));
- if (!mutex_buf)
- return 0;
- for (i = 0; i < CRYPTO_num_locks( ); i++)
- MUTEX_SETUP(mutex_buf[i]);
- CRYPTO_set_id_callback(id_function);
- CRYPTO_set_locking_callback(locking_function);
- return 1;
- }
- int thread_cleanup(void)
- {
- int i;
- if (!mutex_buf)
- return 0;
- CRYPTO_set_id_callback(NULL);
- CRYPTO_set_locking_callback(NULL);
- for (i = 0; i < CRYPTO_num_locks( ); i++)
- MUTEX_CLEANUP(mutex_buf[i]);
- free(mutex_buf);
- mutex_buf = NULL;
- return 1;
- }