extern void clean_ascii(unsigned char *buf, size_t len);
-// timer functions/macros
-#ifdef _WIN32
-# include <windows.h>
-# define sleep(n) Sleep(1000 *(n))
-# define msleep(n) Sleep((n))
-#else
-extern void msleep(uint32_t n); // sleep n milliseconds
-#endif // _WIN32
-
-extern uint64_t msclock(); // a milliseconds clock
+extern int num_CPUs(void); // number of logical CPUs
#endif // UTIL_H__