Hello,

Is there a way to specify custom alignment for structures and variables, something like __declspec(align(<alignment>)) ?

Thanks.

Alexander wrote:
> Is there a way to specify custom alignment for structures and variables, something like __declspec(align(<alignment>)) ?

http://www.digitalmars.com/ctg/pragmas.html#pack

As far as I understood the documentation this pragma sets alignment for members only, but not instances of that struct or class. For example, how would I declare an int variable, which would appear at 128 byte aligned address ?

Thanks.

Walter Bright wrote:
> Alexander wrote:
>> Is there a way to specify custom alignment for structures and variables, something like __declspec(align(<alignment>)) ?
> 
> http://www.digitalmars.com/ctg/pragmas.html#pack

Sergey wrote:
> As far as I understood the documentation this pragma sets alignment for members only, but not instances of that struct or class. For example, how would I declare an int variable, which would appear at 128 byte aligned address ?

There's currently no way to do it statically, as segments themselves are aligned on 16 byte boundaries. You could do it dynamically by allocating a chunk of memory and picking a 128 byte aligned piece of it.

Walter Bright wrote:
> Sergey wrote:
>> As far as I understood the documentation this pragma sets alignment for members only, but not instances of that struct or class. For example, how would I declare an int variable, which would appear at 128 byte aligned address ?
> 
> There's currently no way to do it statically, as segments themselves are aligned on 16 byte boundaries. You could do it dynamically by allocating a chunk of memory and picking a 128 byte aligned piece of it.


Is it in the plans to get that fixed ?

Thanks,
Sergey.

Sergey escreveu:
> Walter Bright wrote:
>> Sergey wrote:
>>> As far as I understood the documentation this pragma sets alignment for members only, but not instances of that struct or class. For example, how would I declare an int variable, which would appear at 128 byte aligned address ?
>>
>> There's currently no way to do it statically, as segments themselves are aligned on 16 byte boundaries. You could do it dynamically by allocating a chunk of memory and picking a 128 byte aligned piece of it.
> 
> 
> Is it in the plans to get that fixed ?
> 
> Thanks,
> Sergey.
Just for a better grasp on the issue: why is there any need to "fix" such a thing?

IMNHO this is not a fault or defect of the compiler, or is it?

> IMNHO this is not a fault or defect of the compiler, or is it?
Well, yes, sorry for putting it wrong,

Anyway,

Is this feature going to be implemented any time soon ?

Thanks.

Cesar Rabak wrote:
> Sergey escreveu:
>> Walter Bright wrote:
>>> Sergey wrote:
>>>> As far as I understood the documentation this pragma sets alignment for members only, but not instances of that struct or class. For example, how would I declare an int variable, which would appear at 128 byte aligned address ?
>>>
>>> There's currently no way to do it statically, as segments themselves are aligned on 16 byte boundaries. You could do it dynamically by allocating a chunk of memory and picking a 128 byte aligned piece of it.
>>
>>
>> Is it in the plans to get that fixed ?
>>
>> Thanks,
>> Sergey.
> Just for a better grasp on the issue: why is there any need to "fix" such a thing?
> 
> IMNHO this is not a fault or defect of the compiler, or is it?

Sergey wrote:
> Is this feature going to be implemented any time soon ?

Not in the near future.