On Fri, 10 Jan 2014, Mark Morgan Lloyd wrote:
Michael Van Canneyt wrote:
On Fri, 10 Jan 2014, Mark Morgan Lloyd wrote:
What's the most efficient and portable way of getting a millisecond
timestamp, relative to any ancient epoch? I find
TimeStampToMSecs(DateTimeToTimeStamp(Now))
hard to swallow since Now() is hardly efficient and the resulting Comp is
marked as non-potable in the documentation.
Where does it say that ?
http://www.freepascal.org/docs-html/prog/progsu157.html#x200-2050008.2.5 "On
other processors, the comp type is not supported."
And why do you think now returns a comp ? It returns a double.
http://lazarus-ccr.sourceforge.net/docs/rtl/sysutils/timestamptomsecs.html
returns comp.
Yes, my bad, I was referring to "Now".
And I hardly see the point of converting something coming from the hardware
and/or a kernel counter to a double and then back to a quadword.
Nevertheless, Now() is the only portable construct available.
Multiply it with msecsperday and round to int64 if you need an integer value.
Michael.
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