/*

 * This file is part of the SSH Library

 *

 * Copyright (c) 2010 by Aris Adamantiadis

 *

 * The SSH Library is free software; you can redistribute it and/or modify

 * it under the terms of the GNU Lesser General Public License as published by

 * the Free Software Foundation; either version 2.1 of the License, or (at your

 * option) any later version.

 *

 * The SSH Library is distributed in the hope that it will be useful, but

 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY

 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public

 * License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public License

 * along with the SSH Library; see the file COPYING.  If not, write to

 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,

 * MA 02111-1307, USA.

 */

/**

 * @defgroup libssh_threads The SSH threading functions.

 * @ingroup libssh

 *

 * Threading with libssh

 * @{

 */

#include "config.h"

#include "libssh/priv.h"

#include "libssh/crypto.h"

#include "libssh/threads.h"

static struct ssh_threads_callbacks_struct *user_callbacks = NULL;

/** @internal

 * @brief inits the threading with the backend cryptographic libraries

 */

int ssh_threads_init(void)

{

    static int threads_initialized = 0;

    int rc;

    if (threads_initialized) {

        return SSH_OK;

    }

    /* first initialize the user_callbacks with our default handlers if not

     * already the case

     */

    if (user_callbacks == NULL){

        user_callbacks = ssh_threads_get_default();

    }

    /* Then initialize the crypto libraries threading callbacks */

    rc = crypto_thread_init(user_callbacks);

    if (rc == SSH_OK) {

        threads_initialized = 1;

    }

    return rc;

}

void ssh_threads_finalize(void)

{

    crypto_thread_finalize();

}

int ssh_threads_set_callbacks(struct ssh_threads_callbacks_struct *cb)

{

    int rc;

    if (user_callbacks != NULL) {

        crypto_thread_finalize();

    }

    user_callbacks = cb;

    rc = crypto_thread_init(user_callbacks);

    return rc;

}

const char *ssh_threads_get_type(void)

{

    if (user_callbacks != NULL) {

        return user_callbacks->type;

    }

    return NULL;

}

/**

 * @}

 */