ComLightInterop

> The details involved in interoperating with C++ are so intricate and involved. Yes in general, but you can pick a subset useful enough in practice. Take a look: https://github.com/Const-me/ComLightInterop

> It removes "managed code tax" for calling into dynamically loaded OpenGL/Vulkan methods Interesting, never heard of that. Do you have a source? I haven’t noticed much overhead when I measured, take a look: https://github.com/Const-me/ComLightInterop#how-it-works That library compiles and runs with .NET Core 2.1. Update: also there https://docs.microsoft.com/en-us/cpp/dotnet/calling-native-f... they wrote “PInvoke has an overhead of between 10 and 30 x86 instructions per call” It roughly corresponds to my observation, and I find it fast enough for all practical applications, including GLES rendering on ARM Linux: https://github.com/Const-me/Vrmac/

Looks way too complicated. I think the reason is rust is not good at OOP. Compare with my C# to C++ interop library, it can easily pass arbitrary complicated types both ways: https://github.com/Const-me/ComLightInterop

> This is no longer a trade-off you need to make with Rust I don’t need to make that trade-off either. In the software I’m working on, I often use C# for less performance-critical parts where I want memory safety, and calling C++ DLLs for code which needs to be unsafe for some good reasons. Apparently, Java had a design goal to force people to code their entire software in Java. C# didn’t, it was designed for native interop from the very beginning, hence value types, real stack, DllImport, unsafe, pointer arithmetic, delegates compatible with C function pointers, HRESULT status codes of exceptions, and so on. At some point I have even made COM interop for Linux: https://github.com/Const-me/ComLightInterop It’s a small project with less than 5k lines of code, because all the heavy lifting was already in the .NET runtime.

COM is not windows specific, and it doesn’t require any language extensions. You can implement and consume these objects with GCC on ARM Linux just fine: https://github.com/Const-me/ComLightInterop