/** Node type: Wrapper around RSCAD CBuilder model
 *
 * @file
 * @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
 * @copyright 2018, Steffen Vogel
 * @license GNU General Public License (version 3)
 *
 * VILLASnode
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * any later version.
 *
 * This program 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 General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *********************************************************************************/

/**
 * @addtogroup cbuilder RTDS CBuilder model node
 * @ingroup node
 * @{
 */

#pragma once

#include <pthread.h>

#include <villas/list.h>

/* Forward declaration */
struct cbuilder;

struct cbuilder_model {
	void (*code)();
	void (*ram)();

	int (*init)(struct cbuilder *cb);
	int (*read)(float inputs[], int len);
	int (*write)(float outputs[], int len);
};

struct cbuilder {
	unsigned long step, read;
	double timestep;

	struct cbuilder_model *model;

	float *params;
	int paramlen;

	/* This mutex and cv are used to protect model parameters, input & outputs
	 *
	 * The cbuilder_read() function will wait for the completion of a simulation step
	 * before returning.
	 * The simulation step is triggerd by a call to cbuilder_write().
	 */
	pthread_mutex_t mtx;

	int eventfd; /**< Eventfd for synchronizing cbuilder_read() / cbuilder_write() access. */
};

/** @} */