+#define TLS_READ_OFFSET(x) ((x)->read_buffer.base + (x)->read_buffer_offset)
+#define TLS_READ_IS_LEFT(x) ((x)->read_buffer.off != 0 && (x)->read_buffer.off != (x)->read_buffer_offset)
+#define TLS_READ_LEFT_LEN(x) ((x)->read_buffer.off - (x)->read_buffer_offset)
+