Dynamic array as stack and GC.BlkAttr.APPENDABLE

[IgorStepanov via Digitalmars-d]

On Sunday, 16 November 2014 at 09:28:25 UTC, Rainer Schuetze 
wrote:
>
>
> On 15.11.2014 23:40, IgorStepanov wrote:
>> Do I any fundamental error in this code?
>> May be Bucket[] ret = new Bucket[len]; ret.ptr is not base 
>> pointer?
>
> Yes, for arrays larger than 2kB, the allocation length 
> information is placed before the actual data, and ret.ptr has 
> an offset of 16 bytes into the allocation block. As a 
> consequence, applying BlkAttr.NO_INTERIOR will very likely 
> cause the block to be collected. NO_INTERIOR has no effect for 
> smaller blocks.
>
> That's why the existing AA code explicitely uses GC.malloc 
> instead of new[].

Thank you very much. That explains a lot.