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
tty_insert_flip_char(struct tty_port * port,unsigned char ch,char flag)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
tty_insert_flip_string(struct tty_port * port,const unsigned char * chars,size_t size)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
