-#define is_signed(type) (((type) (-1)) < 0)
-
-/*
- * Align value to the next multiple of align. Returns val if it already is a
- * multiple of align. Align must be a power of two.
- */
-#define ALIGN_TO(value, align) ((value + (align - 1)) & ~(align - 1))
-
-/*
- * LTTNG_HIDDEN: set the hidden attribute for internal functions
- * On Windows, symbols are local unless explicitly exported,
- * see https://gcc.gnu.org/wiki/Visibility
- */
-#if defined(_WIN32) || defined(__CYGWIN__)
-#define LTTNG_HIDDEN
-#else
-#define LTTNG_HIDDEN __attribute__((visibility("hidden")))
-#endif