Viewing file:  tty_flip.h (1.69 KB) -rw-r--r--
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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_TTY_FLIP_H
#define _LINUX_TTY_FLIP_H
#include <linux/tty_buffer.h>
#include <linux/tty_port.h>
struct tty_ldisc;
extern int tty_buffer_set_limit(struct tty_port *port, int limit);
extern unsigned int tty_buffer_space_avail(struct tty_port *port);
extern int tty_buffer_request_room(struct tty_port *port, size_t size);
extern int tty_insert_flip_string_flags(struct tty_port *port,
const unsigned char *chars, const char *flags, size_t size);
extern int tty_insert_flip_string_fixed_flag(struct tty_port *port,
const unsigned char *chars, char flag, size_t size);
extern int tty_prepare_flip_string(struct tty_port *port,
unsigned char **chars, size_t size);
extern void tty_flip_buffer_push(struct tty_port *port);
int __tty_insert_flip_char(struct tty_port *port, unsigned char ch, char flag);
static inline int tty_insert_flip_char(struct tty_port *port,
unsigned char ch, char flag)
{
struct tty_buffer *tb = port->buf.tail;
int change;
change = (tb->flags & TTYB_NORMAL) && (flag != TTY_NORMAL);
if (!change && tb->used < tb->size) {
if (~tb->flags & TTYB_NORMAL)
*flag_buf_ptr(tb, tb->used) = flag;
*char_buf_ptr(tb, tb->used++) = ch;
return 1;
}
return __tty_insert_flip_char(port, ch, flag);
}
static inline int tty_insert_flip_string(struct tty_port *port,
const unsigned char *chars, size_t size)
{
return tty_insert_flip_string_fixed_flag(port, chars, TTY_NORMAL, size);
}
int tty_ldisc_receive_buf(struct tty_ldisc *ld, const unsigned char *p,
const char *f, int count);
extern void tty_buffer_lock_exclusive(struct tty_port *port);
extern void tty_buffer_unlock_exclusive(struct tty_port *port);
#endif /* _LINUX_TTY_FLIP_H */
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