include/linux/tty_flip.h

   1 #ifndef _LINUX_TTY_FLIP_H
   2 #define _LINUX_TTY_FLIP_H
   3
   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
  17 static inline int tty_insert_flip_char(struct tty_port *port,
  18                                         unsigned char ch, char flag)
  19 {
  20         struct tty_buffer *tb = port->buf.tail;
  21         int change;
  22
  23         change = (tb->flags & TTYB_NORMAL) && (flag != TTY_NORMAL);
  24         if (!change && tb->used < tb->size) {
  25                 if (~tb->flags & TTYB_NORMAL)
  26                         *flag_buf_ptr(tb, tb->used) = flag;
  27                 *char_buf_ptr(tb, tb->used++) = ch;
  28                 return 1;
  29         }
  30         return __tty_insert_flip_char(port, ch, flag);
  31 }
  32
  33 static inline int tty_insert_flip_string(struct tty_port *port,
  34                 const unsigned char *chars, size_t size)
  35 {
  36         return tty_insert_flip_string_fixed_flag(port, chars, TTY_NORMAL, size);
  37 }
  38
  39 extern void tty_buffer_lock_exclusive(struct tty_port *port);
  40 extern void tty_buffer_unlock_exclusive(struct tty_port *port);
  41
  42 #endif /* _LINUX_TTY_FLIP_H */