NAME

       pmtimevalNow, pmtimevalInc, pmtimevalDec, pmtimevalAdd, pmtimevalSub, pmtimevalToReal, pmtimevalFromReal,
       pmPrintStamp - 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 pmPrintStamp(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.

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

NOTES

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

SEE ALSO

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

Performance Co-Pilot                                   PCP                                       PMTIMEVALNOW(3)