Using std.stdio.File in a class

[Steven Schveighoffer]

On Tue, 08 Apr 2014 11:54:45 -0400, Spacen Jasset  
<spacenjasset at mailrazer.com> wrote:

> On Tuesday, 8 April 2014 at 15:18:20 UTC, Steven Schveighoffer wrote:
>> Just a word of caution, I don't think the RAII semantics of File work  
>> properly in multithreaded code when the File is destroyed by the GC.
>
> What do you mean by don't work? I can see that it won't be RAII anymore  
> since there is no stack scope. However, I expect it to get closed  
> properly - as and when the containing object is collected, or when you  
> use the scope keyword with a class object.
>
> Is this not so?

The reference count inc/dec is not thread-safe, so if the GC collects your  
object in a thread that is not the original thread, it may be racing with  
your thread that's simultaneously inc/dec the reference count.

What can you do?

1. Single threaded program.
2. destroy the class deterministically with destroy(x);
3. Ensure the file reference is unique, do not share it with any other  
objects.

-Steve