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1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_TTY_FLIP_H
3 #define _LINUX_TTY_FLIP_H
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
);
18 static inline int tty_insert_flip_char(struct tty_port
*port
,
19 unsigned char ch
, char flag
)
21 struct tty_buffer
*tb
= port
->buf
.tail
;
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
;
31 return __tty_insert_flip_char(port
, ch
, flag
);
34 static inline int tty_insert_flip_string(struct tty_port
*port
,
35 const unsigned char *chars
, size_t size
)
37 return tty_insert_flip_string_fixed_flag(port
, chars
, TTY_NORMAL
, size
);
40 extern void tty_buffer_lock_exclusive(struct tty_port
*port
);
41 extern void tty_buffer_unlock_exclusive(struct tty_port
*port
);
43 #endif /* _LINUX_TTY_FLIP_H */