Re: [FreeDOS-32-dev] Event management in OSLib

[Salvo I. <sa...@em...>]

Hi,

On Monday 28 February 2005 15:09, Luca Abeni wrote:
> oslib has to store timeouts in a linked list containing absolute times
> anyway (for various reasons: for example, to avoid accumulating errors,
> to simplify event insertion/deletion...). So, changing the interface
> would simply move a gettime from the caller to oslib... I do not see
> many advantages.

On Monday 28 February 2005 12:56, Nils Labugt wrote:
> I don't think (IMHO) this is a good idea. If I understand you correctly,
> that you want to store the event in the list in this form, it would mean
> that you would have to subtract form every event in the list for each
> timer tick, witch would be slower if there is many events waiting. Now
> only a single comparison is sufficient (usually).

Thanks for the clarification.

On Monday 28 February 2005 15:09, Luca Abeni wrote:
> It can (and should) of course be changed to use QWORDS, but I do not
> want to change that until the code is stable and runs fine... Otherwise,
> we risk to add mess to the mess :)

OK. I was just asking.
IAC, I suppose the interface in dr-env would stay the same (but see below).

On Monday 28 February 2005 15:17, Luca Abeni wrote:
> I think a resolution of 1us should be sufficient too... But it was
> pointed out that even with a 1ns resolution the system would have many
> years of lifetime (assuming a 64bit variable for storing system time).
> So, the 1ns resolution was chosen. I have no preferences about it...

Something like 585 years... I suppose it is enough for us :-)
Hence, I suggest to use a nanosecond parameter also in the event_post of 
dr-env. In this case we would probably need to make this parameter a QWORD, in 
order to support delta-times longer than 4 s.
Please advise so that I can also change the parameters passed in the 
floppy driver if needed.

Bye,
   Salvo
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