Hi!

Why in std.file toStringz used without store a pointer in
function body to prevent GC collection?

https://github.com/D-Programming-Language/phobos/blob/master/std/file.d

Best Regards,
Ilya

On Wednesday, 29 January 2014 at 08:27:14 UTC, Ilya Yaroshenko wrote:
> Hi!
>
> Why in std.file toStringz used without store a pointer in
> function body to prevent GC collection?
>
> https://github.com/D-Programming-Language/phobos/blob/master/std/file.d
>
> Best Regards,
> Ilya

It is assumed that the pointer is not moved to the C heap where the GC can't see it. The stack is the stack; it doesn't matter if it's a D or C function, the GC sees it anyway.

On Wednesday, 29 January 2014 at 08:29:42 UTC, Jakob Ovrum wrote:
> On Wednesday, 29 January 2014 at 08:27:14 UTC, Ilya Yaroshenko wrote:
>> Hi!
>>
>> Why in std.file toStringz used without store a pointer in
>> function body to prevent GC collection?
>>
>> https://github.com/D-Programming-Language/phobos/blob/master/std/file.d
>>
>> Best Regards,
>> Ilya
>
> It is assumed that the pointer is not moved to the C heap where the GC can't see it. The stack is the stack; it doesn't matter if it's a D or C function, the GC sees it anyway.

Thanks!