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/*
* Functions to add multithreaded compression support to the ewftools
*
* Copyright (c) 2013-2014, Bernhard Zach <bernhard.zach@justbits.at>
*
* Refer to AUTHORS for acknowledgements.
*
* This software 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 3 of the License, or
* (at your option) any later version.
*
* This software 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 General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this software. If not, see <http://www.gnu.org/licenses/>.
*/
#if !defined( _THREADING_H )
#define _THREADING_H
#ifdef __cplusplus
#include <list>
#include <thread>
#endif
#include "fifo_queue.hpp"
#include "imaging_handle.h"
typedef struct threading_support_data threading_support_data_t;
#ifdef __cplusplus
// contains the data for multithread support
struct threading_support_data
{
fifo_queue *reader_to_compressor_queue;
fifo_queue *compressor_to_writer_queue;
std::list<std::thread*> compressor_threads;
std::thread *writer_thread;
};
#endif
#ifdef __cplusplus
extern "C" {
#endif
// just for ewffifotest
int start_threads_testing();
/* created the queues and initializes the compressor- and writer- threads
* returns -1 on error
*/
int init_threading_data_and_start_threads(
imaging_handle_t *imaging_handle,
size_t storage_media_buffer_size,
threading_support_data_t **threading_data,
libcerror_error_t **error );
/* returns -1 on error
*/
int join_threads_and_cleanup_threading_data(
threading_support_data_t *threading_data,
libcerror_error_t **error );
void terminate_threads_and_cleanup_threading_data(
threading_support_data_t **threading_data,
libcerror_error_t **error );
/* Adding a buffer with data to the queue -> the compressing threads will fetch them -> the writer threads writes them to the disk
* Returns the resulting chunk size or -1 on error (to be compatible with the function imaging_handle_prepare_write_buffer())
*/
ssize_t add_buffer_to_queue(
storage_media_buffer_t *storage_media_buffer,
threading_support_data_t *threading_data,
libcerror_error_t **error );
#ifdef __cplusplus
}
#endif
#endif /* _THREADING_H */
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