tty_flip.h 1.6 KB

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