PMTIMESPECNOW(3) Library Functions Manual PMTIMESPECNOW(3)
pmtimespecNow, pmtimespecInc, pmtimespecDec, pmtimespecAdd, pmtimespecSub, pmtimespecToReal, pmtimespecFromReal, pmPrintHighResStamp - helper routines for time stored as a struct timespec
#include <pcp/pmapi.h> void pmtimespecNow(struct timespec *tp); void pmtimespecInc(struct timespec *ap, const struct timespec *bp); void pmtimespecDec(struct timespec *ap, const struct timespec *bp); double pmtimespecAdd(const struct timespec *ap, const struct timespec *bp); double pmtimespecSub(const struct timespec *ap, const struct timespec *bp); double pmtimespecToReal(const struct timespec *tp); void pmtimespecFromReal(double secs, struct timespec *tp); void pmPrintHighResStamp(FILE *f, const struct timespec *tp); cc ... -lpcp
pmtimespecNow is a platform-independent method that returns the current system time since the Epoch in tp. pmtimespecInc adds the time in ap to the time in bp and stores the result in ap. Similarly pmtimespecDec subtracts the time in bp from the time in ap and stores the result in ap. pmtimespecAdd (and pmtimespecSub) add (and subtract) times and return the result as a double value. The time in the ap argument is not changed. pmtimespecToReal converts the time in tp to an equivalent double value. pmtimespecFromReal provides the reverse conversion, taking the time in secs and returning the equivalent time in tp. pmPrintHighResStamp prints the timestamp from tp on the stream f in the local time (as returned by pmLocaltime(3)) in the format HH:MM:SS.XXXXXXXXX.
For variants of these interfaces using microsecond precision and the timeval structure, refer to pmtimevalNow(3).
PMAPI(3), pmLocaltime(3) and pmtimevalNow(3).
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Pages that refer to this page: pmtimeval(3)