druntime redesign

[Jacob Carlborg]

On 2020-05-02 22:24, IGotD- wrote:

> Some OSes don't support everything like memory mapped files and we 
> should support this possibility as well.

Yes, I noticed this the hard way when I added support for iOS. It was 
assumed to be Posix compatible but there are a couple of edge cases 
where some system calls are not available.

> We should also try to isolate the OS independent functionality more. 
> Convenience functions that doesn't need an OS should be broken out, or 
> at least with switches be compiled isolated from the OS dependent code.

I agree. Everything that is platform specific should be in its own 
package, with one sub-package for each platform. I managed to do this 
when I added support for macOS to Mecca [1], turned out quite nice. The 
only remaining version blocks outside the platform package was to select 
the correct platform specific import.

[1] https://github.com/weka-io/mecca/pull/12

-- 
/Jacob Carlborg