Linux kernel mirror (for testing)
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_TTY_FLIP_H
3#define _LINUX_TTY_FLIP_H
4
5#include <linux/tty.h>
6
7extern int tty_buffer_set_limit(struct tty_port *port, int limit);
8extern unsigned int tty_buffer_space_avail(struct tty_port *port);
9extern int tty_buffer_request_room(struct tty_port *port, size_t size);
10extern int tty_insert_flip_string_flags(struct tty_port *port,
11 const unsigned char *chars, const char *flags, size_t size);
12extern int tty_insert_flip_string_fixed_flag(struct tty_port *port,
13 const unsigned char *chars, char flag, size_t size);
14extern int tty_prepare_flip_string(struct tty_port *port,
15 unsigned char **chars, size_t size);
16extern void tty_flip_buffer_push(struct tty_port *port);
17void tty_schedule_flip(struct tty_port *port);
18int __tty_insert_flip_char(struct tty_port *port, unsigned char ch, char flag);
19
20static inline int tty_insert_flip_char(struct tty_port *port,
21 unsigned char ch, char flag)
22{
23 struct tty_buffer *tb = port->buf.tail;
24 int change;
25
26 change = (tb->flags & TTYB_NORMAL) && (flag != TTY_NORMAL);
27 if (!change && tb->used < tb->size) {
28 if (~tb->flags & TTYB_NORMAL)
29 *flag_buf_ptr(tb, tb->used) = flag;
30 *char_buf_ptr(tb, tb->used++) = ch;
31 return 1;
32 }
33 return __tty_insert_flip_char(port, ch, flag);
34}
35
36static inline int tty_insert_flip_string(struct tty_port *port,
37 const unsigned char *chars, size_t size)
38{
39 return tty_insert_flip_string_fixed_flag(port, chars, TTY_NORMAL, size);
40}
41
42extern void tty_buffer_lock_exclusive(struct tty_port *port);
43extern void tty_buffer_unlock_exclusive(struct tty_port *port);
44
45#endif /* _LINUX_TTY_FLIP_H */