Passing C++ class to DLL for callbacks from D (Steam)

[evilrat]

On Sunday, 10 June 2018 at 01:35:40 UTC, cc wrote:
> On Saturday, 9 June 2018 at 14:11:13 UTC, evilrat wrote:
>> However steam devs decided to shield actual pointer and return 
>> pointer sized integer when C API is used(or they just screw 
>> up?). Anyway, the pointers for subsystems returned by context 
>> calls on C++ API and mirrored C API calls are different, but 
>> they also have some mechanism for filtering this stuff, that 
>> way both integer handle and pointer calls the same underlying 
>> implementation, but C API call again is shielded so setting up 
>> CallResult and CCallback are ignored.
>>
>>
>> So my solution was just to make simple wrapper around C++ 
>> context calls and pass that real pointer to D side.
>
> I see, thank you for checking it out.  Is it only the functions 
> that return the interface pointers e.g. ISteamUserStats that 
> need to be wrapped to use the class-based versions instead of 
> the steam_api_flat versions?  Or does the entire callback 
> system need to be handled through the wrapper?

Only subsystems getters like SteamUser() or SteamInventory() 
requires wrapping.

I really can't understand why they ever choose to silently ignore 
registering callbacks received with C API systems handles...