unsynchronized access to primitive variables

[Dejan Lekic]

On Saturday, 19 May 2012 at 08:16:39 UTC, luka8088 wrote:
> Hello to all,
>
> I would like to know if D guarantees that access to primitive 
> variable is atomic ?
>
> I was looking for any source of information that says anything 
> about unsynchronized access to primitive variables. What I want 
> to know is if it is possible (in any way and any OS / hardware) 
> for the following code to output anything other then 1 or 2:
>
> import std.stdio;
> import core.thread;
>
> void main () {
>   int value = 1;
>   (new Thread({ value = 2; })).start();
>   writeln(value);
> }
>
> Thanks !

This proggy will always print "1" because writeln() prints the 
value from the main thread. Spawned thread will have own value. 
Remember TLS is the default storage.