3a6563d668
All plain C examples now (mostly) adhere to the curl code style. While they are only examples, they had diverted so much and contained all sorts of different mixed code styles by now. Having them use a unified style helps users and readability. Also, as they get copy-and-pasted widely by users, making sure they're clean and nice is a good idea. 573 checksrc warnings were addressed.
96 lines
2.7 KiB
C
96 lines
2.7 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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/* <DESC>
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* one way to set the necessary OpenSSL locking callbacks if you want to do
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* multi-threaded transfers with HTTPS/FTPS with libcurl built to use OpenSSL.
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* </DESC>
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*/
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/*
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* This is not a complete stand-alone example.
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*
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* Author: Jeremy Brown
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*/
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#include <stdio.h>
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#include <pthread.h>
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#include <openssl/err.h>
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#define MUTEX_TYPE pthread_mutex_t
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#define MUTEX_SETUP(x) pthread_mutex_init(&(x), NULL)
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#define MUTEX_CLEANUP(x) pthread_mutex_destroy(&(x))
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#define MUTEX_LOCK(x) pthread_mutex_lock(&(x))
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#define MUTEX_UNLOCK(x) pthread_mutex_unlock(&(x))
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#define THREAD_ID pthread_self( )
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void handle_error(const char *file, int lineno, const char *msg)
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{
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fprintf(stderr, "** %s:%d %s\n", file, lineno, msg);
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ERR_print_errors_fp(stderr);
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/* exit(-1); */
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}
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/* This array will store all of the mutexes available to OpenSSL. */
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static MUTEX_TYPE *mutex_buf= NULL;
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static void locking_function(int mode, int n, const char * file, int line)
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{
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if(mode & CRYPTO_LOCK)
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MUTEX_LOCK(mutex_buf[n]);
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else
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MUTEX_UNLOCK(mutex_buf[n]);
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}
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static unsigned long id_function(void)
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{
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return ((unsigned long)THREAD_ID);
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}
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int thread_setup(void)
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{
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int i;
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mutex_buf = malloc(CRYPTO_num_locks( ) * sizeof(MUTEX_TYPE));
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if(!mutex_buf)
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return 0;
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for(i = 0; i < CRYPTO_num_locks( ); i++)
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MUTEX_SETUP(mutex_buf[i]);
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CRYPTO_set_id_callback(id_function);
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CRYPTO_set_locking_callback(locking_function);
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return 1;
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}
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int thread_cleanup(void)
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{
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int i;
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if(!mutex_buf)
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return 0;
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CRYPTO_set_id_callback(NULL);
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CRYPTO_set_locking_callback(NULL);
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for(i = 0; i < CRYPTO_num_locks( ); i++)
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MUTEX_CLEANUP(mutex_buf[i]);
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free(mutex_buf);
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mutex_buf = NULL;
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return 1;
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}
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