first commit

1 files changed, 34 insertions, 0 deletions

diff --git a/include/linux/tty_flip.h b/include/linux/tty_flip.h
new file mode 100644
index 000000000..e0f252633
--- /dev/null
+++ b/include/linux/tty_flip.h
@@ -0,0 +1,34 @@
+#ifndef _LINUX_TTY_FLIP_H
+#define _LINUX_TTY_FLIP_H
+
+extern int tty_buffer_request_room(struct tty_port *port, size_t size);
+extern int tty_insert_flip_string_flags(struct tty_port *port,
+		const unsigned char *chars, const char *flags, size_t size);
+extern int tty_insert_flip_string_fixed_flag(struct tty_port *port,
+		const unsigned char *chars, char flag, size_t size);
+extern int tty_prepare_flip_string(struct tty_port *port,
+		unsigned char **chars, size_t size);
+extern int tty_prepare_flip_string_flags(struct tty_port *port,
+		unsigned char **chars, char **flags, size_t size);
+extern void tty_flip_buffer_push(struct tty_port *port);
+void tty_schedule_flip(struct tty_port *port);
+
+static inline int tty_insert_flip_char(struct tty_port *port,
+					unsigned char ch, char flag)
+{
+	struct tty_buffer *tb = port->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(port, &ch, &flag, 1);
+}
+
+static inline int tty_insert_flip_string(struct tty_port *port,
+		const unsigned char *chars, size_t size)
+{
+	return tty_insert_flip_string_fixed_flag(port, chars, TTY_NORMAL, size);
+}
+
+#endif /* _LINUX_TTY_FLIP_H */