extern const struct __clockid _CLOCK_MONOTONIC;
#define CLOCK_MONOTONIC (&_CLOCK_MONOTONIC)
-extern const struct __clockid _CLOCK_PROCESS_CPUTIME_ID;
-#define CLOCK_PROCESS_CPUTIME_ID (&_CLOCK_PROCESS_CPUTIME_ID)
extern const struct __clockid _CLOCK_REALTIME;
#define CLOCK_REALTIME (&_CLOCK_REALTIME)
-extern const struct __clockid _CLOCK_THREAD_CPUTIME_ID;
-#define CLOCK_THREAD_CPUTIME_ID (&_CLOCK_THREAD_CPUTIME_ID)
/*
* TIME_UTC is the only standardized time base value.