[dmd-concurrency] Shutdown protocol

[Andrei Alexandrescu]

Steve Schveighoffer wrote:
> ----- Original Message ----
> 
>> From: Andrei Alexandrescu <andrei at erdani.com>
>> Steve Schveighoffer wrote:
>>>   foreach(tid; tids) {tid.join();}
>> Oh btw that shouldn't be coded like that, it's slow. Must be something like:
>>
>> joinAll(tids);
>>
>> so joining is initiated in parallel.
>>
> 
> What does joinAll do?  I admit I am not too familiar with your proposed API.

The idea is to join on all threads in parallel. Otherwise, if you have N 
threads, the Nth will become aware you plan to shutdown only after all 
others have already finished.

> And are we talking slow as in several milliseconds slower or several seconds slower? :)

The differences could be eminently measurable.


Andrei