include/linux/tty_flip.h

   1 #ifndef _LINUX_TTY_FLIP_H
   2 #define _LINUX_TTY_FLIP_H
   3
   4 extern int tty_buffer_request_room(struct tty_struct *tty, size_t size);
   5 extern int tty_insert_flip_string(struct tty_struct *tty, unsigned char *chars, size_t size);
   6 extern int tty_insert_flip_string_flags(struct tty_struct *tty, unsigned char *chars, char *flags, size_t size);
   7 extern int tty_prepare_flip_string(struct tty_struct *tty, unsigned char **chars, size_t size);
   8 extern int tty_prepare_flip_string_flags(struct tty_struct *tty, unsigned char **chars, char **flags, size_t size);
   9
  10 static inline int tty_insert_flip_char(struct tty_struct *tty,
  11                                        unsigned char ch, char flag)
  12 {
  13         struct tty_buffer *tb = tty->buf.tail;
  14         if (tb && tb->active && tb->used < tb->size) {
  15                 tb->flag_buf_ptr[tb->used] = flag;
  16                 tb->char_buf_ptr[tb->used++] = ch;
  17                 return 1;
  18         }
  19         return tty_insert_flip_string_flags(tty, &ch, &flag, 1);
  20 }
  21
  22 static inline void tty_schedule_flip(struct tty_struct *tty)
  23 {
  24         unsigned long flags;
  25         spin_lock_irqsave(&tty->buf.lock, flags);
  26         if (tty->buf.tail != NULL) {
  27                 tty->buf.tail->active = 0;
  28                 tty->buf.tail->commit = tty->buf.tail->used;
  29         }
  30         spin_unlock_irqrestore(&tty->buf.lock, flags);
  31         schedule_delayed_work(&tty->buf.work, 1);
  32 }
  33
  34 #undef _INLINE_
  35
  36
  37 #endif /* _LINUX_TTY_FLIP_H */
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