LXR linux/include/linux/tty

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