/* 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_STRUCT_H
#define TTY_STRUCT_H

#include "tty_queue_struct.h"

#include <alarm_struct.h>
#include <mutex_struct.h>
#include <consts.h>

struct tty_struct;

struct winsize_struct {
  unsigned short height;
  unsigned short width;
};

struct tty_vtbl_struct {
  void (*do_output)(struct tty_struct *tty, struct tty_queue_struct *tty_queue);
  void (*do_stop)(struct tty_struct *tty);
  void (*do_start)(struct tty_struct *tty);
  int (*do_ioctl)(struct tty_struct *tty, int request, void *fs_arg);
};

struct tty_struct {
  const struct tty_vtbl_struct *vptr;

  /* parametres */
  unsigned long iflags;                   /* modes d'entree */
  unsigned long oflags;                   /* modes de sortie */
  unsigned long lflags;                   /* modes locaux */
  unsigned char cc[NCCS];                 /* caracteres de controle */

  int pgid;                               /* groupe d'avant-plan */
  unsigned stopped : 1;
  unsigned int output_column;
  unsigned int read_lines;                /* nombre de lignes entieres
                                             disponibles dans la file de
                                             lecture */
  unsigned read_new_line : 1;             /* ligne courante vierge */
  unsigned int read_current_start;        /* position du debut de la ligne
                                             courante dans la file de lecture
                                          */
  unsigned read_timeout : 1;
  unsigned int echo_current_first_column; /* premiere colonne de l'echo de la
                                             ligne courante */

  struct alarm_struct read_alarm;

  struct condition_struct started_condition;
  struct condition_struct read_condition; /* condition d'attente pour la
                                             lecture */

  struct mutex_struct read_mutex;
  struct mutex_struct write_mutex;

  struct tty_queue_struct input_queue;
  struct tty_queue_struct read_queue;
  struct tty_queue_struct output_queue;
};

#endif