is d-runtime non-gc safe?

[Norbert Nemec]

On 05.12.2011 21:40, Tobias Pankrath wrote:
>> Right - thanks for the hint!
>>
>> That would leave the following rules for real-time audio code in D:
>>
>> [snip]
>
> What's about message passing? Is message passing hard real time ready?

The issue actually came up for me a few weeks ago.

In principle, all you need are non-blocking queues to send messages to, 
from or even between RT threads. With the atomic operations in D, such a 
queue is fairly straightforward to implement.

Unfortunately, I could not find any OS support for non-blocking message 
passing. More specifically, there does not seem to be any way to wake a 
sleeping thread by sending a message from a RT thread. The only option 
is periodically querying the message queue. Not optimal, but probably 
sufficient for most purposes.