pmtimespec(3) — Linux manual page


PMTIMESPECNOW(3)        Library Functions Manual        PMTIMESPECNOW(3)

NAME         top

       pmtimespecNow, pmtimespecInc, pmtimespecDec, pmtimespecAdd,
       pmtimespecSub, pmtimespecToReal, pmtimespecFromReal,
       pmPrintHighResStamp - helper routines for time stored as a struct

C SYNOPSIS         top

       #include <pcp/pmapi.h>

       void pmtimespecNow(struct timespec *tp);
       void pmtimespecInc(struct timespec *ap, const struct timespec
       void pmtimespecDec(struct timespec *ap, const struct timespec
       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

DESCRIPTION         top

       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

NOTES         top

       For variants of these interfaces using microsecond precision and
       the timeval structure, refer to pmtimevalNow(3).

SEE ALSO         top

       PMAPI(3), pmLocaltime(3) and pmtimevalNow(3).

COLOPHON         top

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Performance Co-Pilot               PCP                  PMTIMESPECNOW(3)

Pages that refer to this page: pmtimeval(3)