1 #ifndef hertz_h
2 #define hertz_h
3
4 #define HZ_WRONG 0 /* impossible clock frequency */
5
6 /*
7 * Discover the tick frequency of the machine if something goes wrong,
8 * we return HZ_WRONG, an impossible sampling frequency.
9 */
10
11 extern int hertz (void);
12
13 #endif /* hertz_h */
14