Linux 下串口驱动头文件之tty_flip.h

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linux-2.6.29/include/linux下tty_flip.h

#ifndef _LINUX_TTY_FLIP_H
#define _LINUX_TTY_FLIP_H

extern int tty_buffer_request_room(struct tty_struct *tty, size_t size);
extern int tty_insert_flip_string(struct tty_struct *tty, const unsigned char *chars, size_t size);
extern int tty_insert_flip_string_flags(struct tty_struct *tty, const unsigned char *chars, const char *flags, size_t size);
extern int tty_prepare_flip_string(struct tty_struct *tty, unsigned char **chars, size_t size);
extern int tty_prepare_flip_string_flags(struct tty_struct *tty, unsigned char **chars, char **flags, size_t size);
void tty_schedule_flip(struct tty_struct *tty);

static inline int tty_insert_flip_char(struct tty_struct *tty,
     unsigned char ch, char flag)
{
struct tty_buffer *tb = tty->buf.tail;
if (tb && tb->used < tb->size) {
  tb->flag_buf_ptr[tb->used] = flag;
  tb->char_buf_ptr[tb->used++] = ch;
  return 1;
}
return tty_insert_flip_string_flags(tty, &ch, &flag, 1);
}

#endif /* _LINUX_TTY_FLIP_H */