win64 DLL stdout printing after main process completes

[cc]

On Monday, 19 April 2021 at 16:04:28 UTC, Mike Parker wrote:
> On Monday, 19 April 2021 at 14:55:03 UTC, cc wrote:
>
>>
>> And upon running, the output I receive is:
>> ```
>> [Main] Start
>> [Main] x: 5
>> [Main] Finished
>> [Main] END
>> [dll] DLL_PROCESS_ATTACH
>> [dll] static this for mydll
>> [dll] MyDLL_Test
>> [dll] DLL_PROCESS_DETACH
>> [dll] static ~this for mydll
>> ```
>>
>> I would expect the first three lines of dll output to precede 
>> the "[Main] x:" line at least.  Is there something I'm doing 
>> wrong?  Do I need to somehow pass a reference to the main 
>> stdio to the DLL's D runtime similar to how the GC can be 
>> shared?
>
> It's probably just due to buffering. Insert a fflush(stdout) 
> after the calls to printf in your DLL and see what happens.

This seems to work if I flush after every printf or write in both 
main and the dll.  I was under the impression they were supposed 
to share the same IO buffers though, is this not the case?