Does memcpy() affect alignment?

NTFSD
1

I need to use an aligned buffer in FltWriteFile api. So i am allocating an aligned buffer using the FltAllocatePoolAlignedWithTag API.

after that i use memcpy to copy a previous buffer( a char array of size 100) to the new buffer allocated by FltAllocateAlignedWithTag .

I want to know if doing this destroys the alignment ??

Thanks for any help.

Regards,
Aman.

2

> I want to know if doing this destroys the alignment ??

I am not sure that I understand your question.
You copy from one buffer to another, so the alignment is determined by the
buffer to which you copy data.

–
Slava Imameyev, xxxxx@hotmail.com

wrote in message news:xxxxx@ntfsd…
>I need to use an aligned buffer in FltWriteFile api. So i am allocating an
>aligned buffer using the FltAllocatePoolAlignedWithTag API.
>
> after that i use memcpy to copy a previous buffer( a char array of size
> 100) to the new buffer allocated by FltAllocateAlignedWithTag .
>
> I want to know if doing this destroys the alignment ??
>
> Thanks for any help.
>
> Regards,
> Aman.
>

3

Surely not so, since the pointer value is not affected by memcpy.

–
Maxim Shatskih, Windows DDK MVP
StorageCraft Corporation
xxxxx@storagecraft.com
http://www.storagecraft.com

wrote in message news:xxxxx@ntfsd…
> I need to use an aligned buffer in FltWriteFile api. So i am allocating an
aligned buffer using the FltAllocatePoolAlignedWithTag API.
>
> after that i use memcpy to copy a previous buffer( a char array of size 100)
to the new buffer allocated by FltAllocateAlignedWithTag .
>
> I want to know if doing this destroys the alignment ??
>
> Thanks for any help.
>
> Regards,
> Aman.
>