I've already linked to this GitHub discussion, see below ;-)
On 27.03.2020 17:43, Alexandre Torres Porres wrote:
I guess this is a parallel discussion, right?
https://github.com/pure-data/pure-data/pull/604
we've been discussing how to add an inlet to [receive] so it behaves
like [iem_receive]
Em qua., 25 de mar. de 2020 às 18:50, Christof Ressi
<[email protected] <mailto:[email protected]>> escreveu:
Haha, what I wanted to say is that if you're worried about the
danger of
using [iem_receive], then dynamically destroying [r] is not a
solution
because it is just as dangerous because the destructor of [r] will
unbind the symbol.
An easy way to avoid this problem on the user side is to always use a
clock for the message that is going to unbind the symbol. E.g. the
following is always safe:
... -> [del 0] -> [set foo( -> [iem_receive]
The reason is that [del 0] breaks the message passing chain and
executes
the messages downstream at the beginning of the next scheduler tick.
Same thing for dynamically deleting objects.
Don't worry too much. If you've been using [iem_receive] and
dynamically
deleted objects and didn't experience a crash, it probably means
you're
using it in more or less safe ways. It's just something to keep in
mind
for your next patch :-)
Christof
On 25.03.2020 22:16, oliver wrote:
> Christof Ressi wrote:
>> Check out the following discussion on GitHub:
>> https://github.com/pure-data/pure-data/pull/604
>>
>> TL;DR: if you unbind a symbol from a receiver while sending to the
>> symbol, Pd can crash because you modify the bind list while
iterating
>> over it.
>>
>> Personally, I've been using [iem_receive] in some projects and
didn't
>> run into problems, but only because I avoid the case described
above.
>
> Thanks Christof for the explanation !
>
> @IOhannes: i think this should be noted in the helpfile.
>
>
>> Dynamically destroying objects is even more dangerous ;-)
>
> Bummer ... another thing i do quite often ;-)
>
> Since i am not a programmer: how would i decode that twinkle
emoji in
> your sentence ?
>
> does it mean:
>
> a.) be happy that you survived so far, because you're really on
mined
> territory here ...
>
> b.) i know it's not encouraged, but as long as you don't tell
anybody ...
>
>
>
> sorry ... getting a little anxious these days ... ;-)
>
> best
>
> oliver
>
>
>
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