Move crypto/threads to demo/threads

 Changes between 1.0.2 and 1.1.0  [xx XXX xxxx]

  *) The demo files in crypto/threads were moved to demo/threads.

     [Rich Salz]

  *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron and sureware.

     [Matt Caswell]

This shows how to set up the OpenSSL callbacks for use in

multi-threaded programs.

Two implementations, one for Win32 native and one for pthreads, are provided

in th-lock.c  A test program is in mttest.c

Build scripts are in pthread.sh and win32.bat

#!/bin/sh

#

# build using pthreads where it's already built into the system

#

/bin/rm -f mttest

gcc -DPTHREADS -I../../include -g mttest.c -o mttest -L../.. -lssl -lcrypto -lpthread -ldl

/* 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 */