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