+/** Align a value to a power of two */
+#define ALIGN_POT(x, pot_align) (((x) + (pot_align) - 1) & ~((pot_align) - 1))
+
+/**
+ * Macro for declaring an explicit conversion operator. Defaults to an
+ * implicit conversion if C++11 is not supported.
+ */
+#if __cplusplus >= 201103L
+#define EXPLICIT_CONVERSION explicit
+#elif defined(__cplusplus)
+#define EXPLICIT_CONVERSION
+#endif
+
+/** Set a single bit */
+#define BITFIELD_BIT(b) (1u << (b))
+/** Set all bits up to excluding bit b */
+#define BITFIELD_MASK(b) \
+ ((b) == 32 ? (~0u) : BITFIELD_BIT((b) % 32) - 1)
+/** Set count bits starting from bit b */
+#define BITFIELD_RANGE(b, count) \
+ (BITFIELD_MASK((b) + (count)) & ~BITFIELD_MASK(b))
+
+/** Set a single bit */
+#define BITFIELD64_BIT(b) (1ull << (b))
+/** Set all bits up to excluding bit b */
+#define BITFIELD64_MASK(b) \
+ ((b) == 64 ? (~0ull) : BITFIELD64_BIT(b) - 1)
+/** Set count bits starting from bit b */
+#define BITFIELD64_RANGE(b, count) \
+ (BITFIELD64_MASK((b) + (count)) & ~BITFIELD64_MASK(b))
+