C callbacks getting a value of 0! Bug in D?

[Johnson Jones via Digitalmars-d-learn]

On Tuesday, 29 August 2017 at 01:56:43 UTC, Moritz Maxeiner wrote:
> On Tuesday, 29 August 2017 at 01:34:40 UTC, Johnson Jones wrote:
>> [...]
>>
>>
>> produces 4 on both x86 and x64. So, I'm not sure how you are 
>> getting 8.
>
> There are different 64bit data models [1] and it seems your 
> platform uses LLP64, which uses 32bit longs. Am I correct in 
> assuming you're on Windows (as they are the only major modern 
> platform that I'm aware of that made this choice)?
>
> [1] 
> https://en.wikipedia.org/wiki/64-bit_computing#64-bit_data_models

Yes.

I found this, which gives a map for all the types: 
https://dlang.org/spec/interfaceToC.html

Seems only long and ulong are issues.