Waiting on file descriptor/socket *AND* thread messages

[Steven Schveighoffer]

On 6/29/20 5:14 AM, ichneumwn wrote:
> Dear all,
> 
> Is there some facility in D for a single statement/function call that 
> will wait on both file descriptors, like Socket.select(), and will also 
> wake up when there is something to be receive()'d?

Not in the standard library. Such things require an event framework, 
because there is no OS-agnostic provided mechanism to sleep on all these 
things at once.

I recommend looking through code.dlang.org. I found these:

https://code.dlang.org/packages/libasync
https://code.dlang.org/packages/eventcore
https://code.dlang.org/packages/mecca (this seems very underdocumented, 
but I know it provides such a system)

> 
> One solution would be to have my main thread use receive() and a helper 
> thread that does the select() call and sends a message to the main 
> thread. That seems a bit of overkill however.

I don't know the correct way to solve this, I've done it in the past by 
creating a file descriptor that can be waited on to wake up the target 
along with any other file descriptors being waited on.

-Steve