Hi,

I have a struct in a separate thread and want to pass it's address back to the main thread. This is how I think it should work:

import std.concurrency;

struct Env {}

void run ()
{
	shared Env env;
	ownerTid.send (&env);
	for (;;) {}
}

void main ()
{
	spawn (&run);
	auto e = receiveOnly!(shared Env*);
}

but I'm getting an error when main tries to receive the pointer. The error message says:

std.concurrency.MessageMismatch@std/concurrency.d(237): Unexpected message type: expected 'shared(Env*)', got 'shared(test.Env)*'

Now, how can I pass that pointer back to main?

On Sunday, 6 September 2020 at 09:58:54 UTC, Johann Lermer wrote:
> pointer. The error message says:
>
> std.concurrency.MessageMismatch@std/concurrency.d(237): Unexpected message type: expected 'shared(Env*)', got 'shared(test.Env)*'

The error message gives you all the information you need - notice the position of the asterisk inside the parens on one, outside on the other? The pointer itself is not shared, only the pointee - the data pointed to. This works:

    auto e = receiveOnly!(shared(Env)*);

--
  Simen

On Sunday, 6 September 2020 at 11:10:14 UTC, Simen Kjærås wrote:
>     auto e = receiveOnly!(shared(Env)*);

Oh, thanks. Seems, that I just missed that bit with the pranetheses.