diff options
Diffstat (limited to 'sys/sys/ttydisc.h')
| -rw-r--r-- | sys/sys/ttydisc.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/sys/sys/ttydisc.h b/sys/sys/ttydisc.h new file mode 100644 index 0000000..dd170e6 --- /dev/null +++ b/sys/sys/ttydisc.h @@ -0,0 +1,105 @@ +/*- + * Copyright (c) 2008 Ed Schouten <ed@FreeBSD.org> + * All rights reserved. + * + * Portions of this software were developed under sponsorship from Snow + * B.V., the Netherlands. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _SYS_TTYDISC_H_ +#define _SYS_TTYDISC_H_ + +#ifndef _SYS_TTY_H_ +#error "can only be included through <sys/tty.h>" +#endif /* !_SYS_TTY_H_ */ + +struct cv; +struct thread; +struct tty; +struct uio; + +/* Top half routines. */ +void ttydisc_open(struct tty *); +void ttydisc_close(struct tty *); +int ttydisc_read(struct tty *, struct uio *, int); +int ttydisc_write(struct tty *, struct uio *, int); +void ttydisc_optimize(struct tty *); + +/* Bottom half routines. */ +void ttydisc_modem(struct tty *, int); +#define ttydisc_can_bypass(tp) ((tp)->t_flags & TF_BYPASS) +int ttydisc_rint(struct tty *, char, int); +size_t ttydisc_rint_bypass(struct tty *, char *, size_t); +void ttydisc_rint_done(struct tty *); +size_t ttydisc_getc(struct tty *, void *buf, size_t); +int ttydisc_getc_uio(struct tty *, struct uio *); + +/* Error codes for ttydisc_rint(). */ +#define TRE_FRAMING 0x01 +#define TRE_PARITY 0x02 +#define TRE_OVERRUN 0x04 +#define TRE_BREAK 0x08 + +static __inline size_t +ttydisc_read_poll(struct tty *tp) +{ + + tty_lock_assert(tp, MA_OWNED); + + return ttyinq_bytescanonicalized(&tp->t_inq); +} + +static __inline size_t +ttydisc_write_poll(struct tty *tp) +{ + + tty_lock_assert(tp, MA_OWNED); + + return ttyoutq_bytesleft(&tp->t_outq); +} + +static __inline size_t +ttydisc_rint_poll(struct tty *tp) +{ + + tty_lock_assert(tp, MA_OWNED); + + return ttyinq_bytesleft(&tp->t_inq); +} + +static __inline size_t +ttydisc_getc_poll(struct tty *tp) +{ + + tty_lock_assert(tp, MA_OWNED); + + if (tp->t_flags & TF_STOPPED) + return (0); + + return ttyoutq_bytesused(&tp->t_outq); +} + +#endif /* !_SYS_TTYDISC_H_ */ |
