diff --git a/aos/common/macros.h b/aos/common/macros.h
new file mode 100644
index 0000000..88fc52e
--- /dev/null
+++ b/aos/common/macros.h
@@ -0,0 +1,25 @@
+#ifndef _AOS_COMMON_MACROS_H_
+#define _AOS_COMMON_MACROS_H_
+
+// This file has some common macros etc.
+
+// A macro to disallow the copy constructor and operator= functions
+// This should be used in the private: declarations for a class
+#define DISALLOW_COPY_AND_ASSIGN(TypeName) \
+  TypeName(const TypeName&);               \
+  void operator=(const TypeName&)
+// A macro to wrap arguments to macros that contain commas.
+// Useful for DISALLOW_COPY_AND_ASSIGNing templated types with multiple template
+// arguments.
+#define MACRO_ARG(...) __VA_ARGS__
+// Double-wraps macro arguments.
+// Necessary to use commas in gtest predicate arguments.
+#define MACRO_DARG(...) (__VA_ARGS__)
+
+#ifdef __GNUC__
+#define UNUSED_VARIABLE __attribute__ ((unused))
+#else
+#define UNUSED_VARIABLE
+#endif
+
+#endif  // _AOS_COMMON_MACROS_H_