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
       timespec

C SYNOPSIS         top

       #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

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
       HH:MM:SS.XXXXXXXXX.

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

       This page is part of the PCP (Performance Co-Pilot) project.
       Information about the project can be found at 
       ⟨http://www.pcp.io/⟩.  If you have a bug report for this manual
       page, send it to [email protected].  This page was obtained from the
       project's upstream Git repository
       ⟨https://github.com/performancecopilot/pcp.git⟩ on 2024-06-14.
       (At that time, the date of the most recent commit that was found
       in the repository was 2024-06-14.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       [email protected]

Performance Co-Pilot               PCP                  PMTIMESPECNOW(3)

Pages that refer to this page: pmtimeval(3)

HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH.