Re: [AD] Undocumented number of timer functions

[Peter Wang <tjaden@xxxxxxxxxx>]

Grzegorz Adam Hankiewicz wrote:

> The documentation doesn't say explicitly how many timer functions
> a user can register.  A small test under linux gives me about
> 1000 timers before install_int returns different than zero.

I think your test is wrong.

> What
> about other platform restrictions? Even if possible, should the
> documentation recommend to not install more than X timers for
> performance issues or portability?
>  

Timer drivers can implement their own install_int, etc. methods but I 
don't think any of them do.  In that case they fall back on the default 
implementation in timer.c, which can only hold 16 timers (see MAX_TIMERS 
in aintern.h).  Moreover, Allegro can use some of these itself (a quick 
look: mouse cursor drawing, keyboard rate handling, MIDI playing, the 
digital sound sweep effect and FLIC playing can all use timer interrupts).

Peter