[fpc-pascal] Efficient millisecond timestamp

[Mark Morgan Lloyd]

Michael Van Canneyt wrote:
> On Fri, 10 Jan 2014, Mark Morgan Lloyd wrote:
> 
>> Michael Van Canneyt wrote:
>>
>>>> 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.
>>
>> What about non-portable, e.g. unix-only? I don't see anything obvious 
>> in the BaseUnix documentation.
> 
> That's because there is nothing. Most platforms support get_clock() but 
> in FPC this is linux-only, as far as I know.

Thanks, I'll investigate.

>> I'm sure there's something in EpikTimer I could use, but I'm trying to 
>> keep things fairly lean.
> 
> Last time I looked, EpikTimer used Now() on Unixes, definitely if you 
> were not on intel platforms. But maybe the situation has improved 
> meanwhile, you would need to check the code.

OK, I'll look at that presently. My recollection is that it ran OK on 
Linux SPARC etc. (although I didn't check /how/ it ran IYSWIM) but not 
on Solaris SPARC.

-- 
Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk

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