1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_TTY_FLIP_H
3 #define _LINUX_TTY_FLIP_H
7 extern int tty_buffer_set_limit(struct tty_port *port, int limit);
8 extern unsigned int tty_buffer_space_avail(struct tty_port *port);
9 extern int tty_buffer_request_room(struct tty_port *port, size_t size);
10 extern int tty_insert_flip_string_flags(struct tty_port *port,
11 const unsigned char *chars, const char *flags, size_t size);
12 extern int tty_insert_flip_string_fixed_flag(struct tty_port *port,
13 const unsigned char *chars, char flag, size_t size);
14 extern int tty_prepare_flip_string(struct tty_port *port,
15 unsigned char **chars, size_t size);
16 extern void tty_flip_buffer_push(struct tty_port *port);
17 void tty_schedule_flip(struct tty_port *port);
18 int __tty_insert_flip_char(struct tty_port *port, unsigned char ch, char flag);
20 static inline int tty_insert_flip_char(struct tty_port *port,
21 unsigned char ch, char flag)
23 struct tty_buffer *tb = port->buf.tail;
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;
33 return __tty_insert_flip_char(port, ch, flag);
36 static inline int tty_insert_flip_string(struct tty_port *port,
37 const unsigned char *chars, size_t size)
39 return tty_insert_flip_string_fixed_flag(port, chars, TTY_NORMAL, size);
42 extern void tty_buffer_lock_exclusive(struct tty_port *port);
43 extern void tty_buffer_unlock_exclusive(struct tty_port *port);
45 #endif /* _LINUX_TTY_FLIP_H */