extern const std::string engine_info(bool to_uci = false);
extern int system_time();
extern int cpu_count();
-extern void timed_wait(WaitCondition*, Lock*, int);
+extern void timed_wait(WaitCondition&, Lock&, int);
extern void prefetch(char* addr);
extern void dbg_hit_on(bool b);
extern void dbg_hit_on_c(bool c, bool b);
-extern void dbg_before();
-extern void dbg_after();
extern void dbg_mean_of(int v);
-extern void dbg_print_hit_rate();
-extern void dbg_print_mean();
+extern void dbg_print();
class Position;
extern Move move_from_uci(const Position& pos, const std::string& str);