/***************************************************************************
 *   Copyright (C) 11/2014 by Olaf Rempel                                  *
 *   razzor@kopf-tisch.de                                                  *
 *                                                                         *
 *   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; version 2 of the License,               *
 *                                                                         *
 *   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, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/
#include <avr/io.h>

#include "event.h"

/* *********************************************************************** */

#define EVENT_COUNT         16

static struct event_entry events[EVENT_COUNT];
static volatile uint8_t event_in_idx;
static volatile uint8_t event_out_idx;


/* *********************************************************************** */

void event_queue(uint8_t type, uint8_t num, uint16_t value)
{
    uint8_t idx                 = event_in_idx;
    struct event_entry *event   = &events[idx++];

    if (event->type == EVENT_TYPE_EMPTY)
    {
        event->type     = type;
        event->num      = num;
        event->value    = value;
        event_in_idx    = idx % EVENT_COUNT;
    }
} /* event_queue */


struct event_entry * event_get(void)
{
    return &events[event_out_idx];
} /* event_get */


void event_clear(void)
{
    uint8_t idx         = event_out_idx;
    events[idx++].type  = EVENT_TYPE_EMPTY;
    event_out_idx       = idx % EVENT_COUNT;
} /* event_clear */