* - http://cellperformance.beyond3d.com/articles/2006/05/demystifying-the-restrict-keyword.html
*/
#ifndef restrict
-# if (__STDC_VERSION__ >= 199901L)
+# if (__STDC_VERSION__ >= 199901L) && !defined(__cplusplus)
/* C99 */
# elif defined(__GNUC__)
# define restrict __restrict__