Hmm, that sorta figures.
I've got lots of t_atom * arrays and I'm getting some values from four separate
arrays, setting them in another array and outputting the final array as a list.
When I put the post() message in after the outlet_list() message it works, but
when I don't it just outputs a list of 0's, regardless of the values I got.
I'll try to run it with gdb and a simple test patch later on - I'm curious to
know what the cause is as it's happened to me a few times.
Cheers,
Ed
(simplified) code extract, if you're curious:
#define ELEMENTS 4
njsequence_float(t_njsequence *x, t_floatarg fin) {
int inPos = (int)fin;
x->offset_1 = atom_getfloatarg(inPos, MAXENTRIES, x->x_tracks.offset_1);
x->offset_2 = atom_getfloatarg(inPos, MAXENTRIES, x->x_tracks.offset_2);
x->offset_3 = atom_getfloatarg(inPos, MAXENTRIES, x->x_tracks.offset_3);
x->offset_4 = atom_getfloatarg(inPos, MAXENTRIES, x->x_tracks.offset_4);
SETFLOAT(&x->x_tracks.offsetList[0],x->offset_1);
SETFLOAT(&x->x_tracks.offsetList[1],x->offset_2);
SETFLOAT(&x->x_tracks.offsetList[2],x->offset_3);
SETFLOAT(&x->x_tracks.offsetList[3],x->offset_4);
outlet_list(x->offsets, gensym("list"), ELEMENTS, x->x_tracks.offsetList);
post("normal! OFFSETS:::: %d, %d, %d,
%d",(int)x->offset_1,(int)x->offset_2,(int)x->offset_3,(int)x->offset_4);
}
I could post the whole thing, but you probably have better things to do than
sift through >1300 lines of code
Ninja Jamm - a revolutionary new music remix app from Ninja Tune and Seeper,
for iPhone and iPad
http://www.ninjajamm.com/
Gemnotes-0.2: Live music notation for Pure Data, now with dynamics!
http://sharktracks.co.uk/
On Friday, 12 September 2014, 2:46, Miller Puckette <[email protected]> wrote:
>
>
>This has happened to me occasionally in the past. I think it's usually
>that some routine that is getting called after post() is accessing an
>automatic variable (on the stack) without having set it earlier. The
>post() call is simply changing the behavior by using the stack
>itself.
>
>If you can't catch it with gdb (which might allow you to avoid adding printout)
>another strategy is to try moving the post() line further down in the code -
>if by moving it below some other line you make it fail again, some function
>call in that line might be doing the bad access.
>
>cheers
>M
>
>
>On Fri, Sep 12, 2014 at 01:27:53AM +0100, Ed Kelly wrote:
>> Hi devs,
>>
>> I've recently, and a number of times in the past had a problem with writing
>> externals which is this:
>> An external is supposed to output something (such as a list) from an
>> internally stored array, and it does not work.
>> When I add a
>> post("This is this %d",x->theValue);
>> It starts working.
>> This has happened to my code more than once, both in Pd under Linux and in
>> libPd in iOS. It's happened not just recently, but over a number of years.
>> I wonder if there is a relationship between Pd and the use of internal
>> arrays that has to be cemented in some way before it can work, and if there
>> is some problem in the Pd code (or I might be stupid about something).
>> I'll try to find a simple way of demonstrating this - the current extern is
>> about 1800 lines of C, but maybe I can cook up a test if I have time.
>>
>> Has anyone else had this problem?
>> Ed
>>
>> Ninja Jamm - a revolutionary new music remix app from Ninja Tune and Seeper,
>> for iPhone and iPad
>> http://www.ninjajamm.com/
>>
>>
>> Gemnotes-0.2: Live music notation for Pure Data, now with dynamics!
>> http://sharktracks.co.uk/
>
>> _______________________________________________
>> Pd-dev mailing list
>> [email protected]
>> http://lists.puredata.info/listinfo/pd-dev
>
>
>
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