Concurrency message passing

[Steven Schveighoffer]

On 8/17/21 7:05 AM, JG wrote:
> Hi
> 
> I have a program with two threads. One thread produces data that is put 
> in a queue
> and then consumed by the other thread. I initially built a custom queue 
> to do this, but thought this should have some standard solution in D? I 
> looked at std.concurrency and thought that message passing could be 
> used. However, the problem is that I get the following error.
> 
> Error: static assert:  "Aliases to mutable thread-local data not allowed."
> 
> I am not sure how to solve this.  Maybe message parsing isn't the 
> correct solution?
> Is there some standard solution to this in D?

Data with references needs to be marked either immutable or shared in 
order to be passed using std.concurrency. D is strict about not sharing 
thread-local data, because then you can use the type system to prove 
lock-free code is valid.

However, data that has no references (aliases) should be passable 
regardless of mutability, because you are passing a copy.

-Steve