• Johann Lermer (23/23) Sep 06 2020 Hi,
• Simen =?UTF-8?B?S2rDpnLDpXM=?= (8/12) Sep 06 2020 The error message gives you all the information you need - notice
• Johann Lermer (3/4) Sep 06 2020 Oh, thanks. Seems, that I just missed that bit with the

Johann Lermer <johann.lermer elvin.eu> writes:

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?

Simen =?UTF-8?B?S2rDpnLDpXM=?= <simen.kjaras gmail.com> writes:

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

Johann Lermer <johann.lermer elvin.eu> writes:

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.