Major Description
such macro defines in proxy/api/ts/experimental.h:
#define TS_HRTIME_FOREVER HRTIME_FOREVER
#define TS_HRTIME_DECADE HRTIME_DECADE
#define TS_HRTIME_YEAR HRTIME_YEAR
#define TS_HRTIME_WEEK HRTIME_WEEK
#define TS_HRTIME_DAY HRTIME_DAY
#define TS_HRTIME_HOUR HRTIME_HOUR
#define TS_HRTIME_MINUTE HRTIME_MINUTE
#define TS_HRTIME_SECOND HRTIME_SECOND
#define TS_HRTIME_MSECOND HRTIME_MSECOND
#define TS_HRTIME_USECOND HRTIME_USECOND
#define TS_HRTIME_NSECOND HRTIME_NSECOND
...
The macros of HRTIME_xxx (such as HRTIME_SECOND) in lib/ts/ink_hrtime.h。
Because the TS plugins SHOULD not include the header file ink_hrtime.h, so they can't use above macros like TS_HRTIME_xxx。