/* Copyright (C) 2008  Emmanuel Varoquaux

   This file is part of XOS.

   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
   (at your option) 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/>. */

#ifndef TTY_QUEUE_H
#define TTY_QUEUE_H

struct tty_queue_struct;

void tty_queue_init(struct tty_queue_struct *tty_queue);

unsigned int tty_queue_get_end(const struct tty_queue_struct *tty_queue);
int tty_queue_is_empty(const struct tty_queue_struct *tty_queue);
int tty_queue_is_full(const struct tty_queue_struct *tty_queue);
int tty_queue_get_last(const struct tty_queue_struct *tty_queue, char *c);
int tty_queue_get(const struct tty_queue_struct *tty_queue, unsigned int *pos, char *c);

int tty_queue_push(struct tty_queue_struct *tty_queue, char c);
int tty_queue_pop(struct tty_queue_struct *tty_queue, char *c);
void tty_queue_del(struct tty_queue_struct *tty_queue);
void tty_queue_clear(struct tty_queue_struct *tty_queue);

#endif