[PD-dev] Passing creation arguments to newmethod

[Claude Heiland-Allen]

Hi,

On 05/08/2021 22:32, Christof Ressi wrote:
> Fun fact: pd_typedmess() often calls function pointers with more 
> arguments than the original functions - which is undefined behavior. 
> It just happens to work because in the default calling convention 
> ("cdecl") the caller cleans up the stack. With other calling 
> conventions where the *callee* has to clean up the stack, e. g. 
> "stdcall", this would lead to stack corruption and crash horribly :-)

I had to fix this in my patches to compile for web with Emscripten, 
where function pointers must be called at their exact type (or the 
Emscripten runtime stops hard).

https://github.com/pure-data/pure-data/pull/688

May need a little care and attention before merging, sorry I haven't 
been more proactive on this one.

I think something similar might have been integrated into Purr-data already?


Claude

-- 

https://mathr.co.uk