dispatcher

[Psychological Cleanup via Digitalmars-d-learn]

On Wednesday, 6 September 2017 at 09:47:34 UTC, user1234 wrote:
> On Wednesday, 6 September 2017 at 05:57:18 UTC, Psychological 
> Cleanup wrote:
>> I have a C callback that must call some functions declared in 
>> D. I can't call them off the C thread because it will result 
>> in a violation. What is a good way to dispatch the call to the 
>> main D program?
>>
>> I'm thinking that I might have to create an extra thread that 
>> monitors for when a call needs to occur and does so. Doesn't 
>> seem very effective though? Does anyone know how C# does it?
>
> 1/ mark the D function as "extern(C)".
> 2/ take care to how things are passed to the D functions, 
> especially arrays.
> 3/ take care not to mutate memory created from the D side...i.e 
> copy after the call.

This wont work. The callback must be relatively performant and 
must access the D code on the D side normally.