[PD] trouble with t_signal **

[Miller Puckette]

Hi all --

both the array of t_signal pointers and the t_signals themselves are 
temporarily constructed to last just for the duration of the dsp() call 
and then the space is re-used.

The only thing you see from dsp() that will still be there afterward is
the array of t_samples pointed to in the t_signal structures.

This ought to be documented somewhere :)

cheers
Miller
On Sat, Jul 31, 2010 at 03:25:38PM -0400, Mathieu Bouchard wrote:
> 
> why is it even possible that in three calls to the 'dsp' method in three 
> different objects, two of them receive the same t_signal pointer pointer ?
> 
> static void dsp (BFObject *bself, t_signal **sp) {
>   post("dsp bself=%p signal**=%p",bself,sp);
> }
> 
> gives me :
> 
>   dsp bself=0x8cc4dd8 signal**=0x8cdb288
>   dsp bself=0x8cc4130 signal**=0x8cdb288
>   dsp bself=0x8cd4868 signal**=0x8cda8a0
> 
> and as you see, two signal** are identical.
> 
> why ? I don't get it.
> 
>  _ _ __ ___ _____ ________ _____________ _____________________ ...
> | Mathieu Bouchard, Montr?al, Qu?bec. t?l?phone: +1.514.383.3801

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