diff --git a/lib/rb/ext/macros.h b/lib/rb/ext/macros.h
new file mode 100644
index 0000000..2072cb5
--- /dev/null
+++ b/lib/rb/ext/macros.h
@@ -0,0 +1,7 @@
+
+#define GET_TRANSPORT(obj) rb_ivar_get(obj, transport_ivar_id)
+#define GET_STRICT_READ(obj) rb_ivar_get(obj, strict_read_ivar_id)
+#define GET_STRICT_WRITE(obj) rb_ivar_get(obj, strict_write_ivar_id)
+#define WRITE(obj, data, length) rb_funcall(obj, write_method_id, 1, rb_str_new(data, length))
+#define CHECK_NIL(obj) if (NIL_P(obj)) { rb_raise(rb_eStandardError, "nil argument not allowed!");}
+#define READ(obj, length) rb_funcall(GET_TRANSPORT(obj), read_method_id, 1, INT2FIX(length)) 
\ No newline at end of file