scoutos / prex-0.9.0 / bsp / drv / include / tty.h @ 03e9c04a
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1 | 03e9c04a | Brad Neuman | /*-
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2 | * Copyright (c) 1982, 1986, 1993
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3 | * The Regents of the University of California. All rights reserved.
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4 | * (c) UNIX System Laboratories, Inc.
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5 | * All or some portions of this file are derived from material licensed
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6 | * to the University of California by American Telephone and Telegraph
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7 | * Co. or Unix System Laboratories, Inc. and are reproduced herein with
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8 | * the permission of UNIX System Laboratories, Inc.
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9 | *
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10 | * Redistribution and use in source and binary forms, with or without
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11 | * modification, are permitted provided that the following conditions
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12 | * are met:
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13 | * 1. Redistributions of source code must retain the above copyright
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14 | * notice, this list of conditions and the following disclaimer.
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15 | * 2. Redistributions in binary form must reproduce the above copyright
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16 | * notice, this list of conditions and the following disclaimer in the
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17 | * documentation and/or other materials provided with the distribution.
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18 | * 3. Neither the name of the University nor the names of its contributors
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19 | * may be used to endorse or promote products derived from this software
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20 | * without specific prior written permission.
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21 | *
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22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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32 | * SUCH DAMAGE.
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33 | *
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34 | * @(#)tty.h 8.7 (Berkeley) 1/9/95
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35 | */
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36 | |||
37 | #ifndef _SYS_TTY_H_
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38 | #define _SYS_TTY_H_
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39 | |||
40 | #include <sys/cdefs.h> |
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41 | #include <sys/termios.h> |
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42 | #include <sys/syslimits.h> |
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43 | |||
44 | #define TTYQ_SIZE MAX_INPUT
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45 | #define TTYQ_HIWAT (TTYQ_SIZE - 10) |
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46 | |||
47 | struct tty_queue {
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48 | char tq_buf[TTYQ_SIZE];
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49 | int tq_head;
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50 | int tq_tail;
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51 | int tq_count;
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52 | }; |
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53 | |||
54 | /*
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55 | * Per-tty structure.
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56 | */
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57 | struct tty {
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58 | struct tty_queue t_rawq; /* raw input queue */ |
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59 | struct tty_queue t_canq; /* canonical queue */ |
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60 | struct tty_queue t_outq; /* ouput queue */ |
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61 | struct termios t_termios; /* termios state */ |
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62 | struct winsize t_winsize; /* window size */ |
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63 | struct event t_input; /* event for input data ready */ |
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64 | struct event t_output; /* event for output completion */ |
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65 | void (*t_oproc)(struct tty *); /* routine to start output */ |
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66 | device_t t_dev; /* device */
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67 | int t_state; /* driver state */ |
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68 | int t_column; /* tty output column */ |
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69 | pid_t t_pgid; /* foreground process group. */
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70 | task_t t_sigtask; /* task to dispatch the tty signal */
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71 | int t_signo; /* pending signal# */ |
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72 | struct dpc t_dpc; /* dpc for tty */ |
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73 | }; |
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74 | |||
75 | #define t_iflag t_termios.c_iflag
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76 | #define t_oflag t_termios.c_oflag
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77 | #define t_cflag t_termios.c_cflag
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78 | #define t_lflag t_termios.c_lflag
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79 | #define t_cc t_termios.c_cc
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80 | #define t_ispeed t_termios.c_ispeed
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81 | #define t_ospeed t_termios.c_ospeed
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82 | |||
83 | /* These flags are kept in t_state. */
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84 | #define TS_ASLEEP 0x00001 /* Process waiting for tty. */ |
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85 | #define TS_BUSY 0x00004 /* Draining output. */ |
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86 | #define TS_TIMEOUT 0x00100 /* Wait for output char processing. */ |
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87 | #define TS_TTSTOP 0x00200 /* Output paused. */ |
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88 | #define TS_ISIG 0x00400 /* Input is interrupted by signal. */ |
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89 | |||
90 | __BEGIN_DECLS |
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91 | int tty_read(struct tty *, char *, size_t *); |
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92 | int tty_write(struct tty *, char *, size_t *); |
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93 | int tty_ioctl(struct tty *, u_long, void *); |
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94 | void tty_input(int, struct tty *); |
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95 | int tty_getc(struct tty_queue *); |
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96 | void tty_done(struct tty *); |
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97 | void tty_attach(struct tty *); |
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98 | __END_DECLS |
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99 | |||
100 | #endif /* !_SYS_TTY_H_ */ |