NAME

       pmtimevalNow, pmtimevalInc, pmtimevalDec, pmtimevalAdd, pmtimevalSub, pmtimevalToReal, pmtimevalFromReal,
       pmtimevalTotimespec, pmtimevalPrint - helper routines for time stored as a struct timeval

C SYNOPSIS

       #include <pcp/pmapi.h>

       void pmtimevalNow(struct timeval *tv);
       void pmtimevalInc(struct timeval *ap, const struct timeval *bp);
       void pmtimevalDec(struct timeval *ap, const struct timeval *bp);
       double pmtimevalAdd(const struct timeval *ap, const struct timeval *bp);
       double pmtimevalSub(const struct timeval *ap, const struct timeval *bp);
       double pmtimevalToReal(const struct timeval *val);
       void pmtimevalFromReal(double secs, struct timeval *val);
       void pmtimevalTotimespec(struct timeval *tvp, struct timespec *tsp);
       void pmtimevalPrint(FILE *f, const struct timeval *tp);

       cc ... -lpcp

DESCRIPTION

       pmtimevalNow is a platform-independent method that returns the current system time since the Epoch in tv.

       pmtimevalInc  adds  the time in ap to the time in bp and stores the result in ap.  Similarly pmtimevalDec
       subtracts the time in bp from the time in ap and stores the result in ap.

       pmtimevalAdd (and pmtimevalSub) add (and subtract) times and return the result as a  double  value.   The
       time in the ap argument is not changed.

       pmtimevalToReal  converts  the  time in tp to an equivalent double value.  pmtimevalFromReal provides the
       reverse conversion, taking the time in secs and returning the equivalent time in val.

       pmtimevalTotimespec converts the struct timeval tvp into an equivalent struct timespec tsp (modulo round‐
       ing microseconds up to nanoseconds).

       pmtimevalPrint prints the timestamp from tp on the stream f in the local time (as  returned  by  pmLocal‐
       time(3)) in the format HH:MM:SS.XXX.

NOTES

       For  variants of these interfaces using nanosecond precision and the timespec structure, refer to pmtime‐
       specNow(3).

COMPATIBILITY

       Prior to PCP 7.0 the routine pmtimevalPrint was called pmPrintStamp.  To support  PMAPI  transition,  the
       old routine can still be used if applications are recompiled with -DPMAPI_VERSION=2.

       pmPrintStamp is now deprecated and compile-time support for this routine name will be removed in a future
       release.

SEE ALSO

       gettimeofday(2), time(2), PMAPI(3), pmLocaltime(3) and pmtimespecNow(3).

Performance Co-Pilot                                   PCP                                       PMTIMEVALNOW(3)