[Development] Changing container privates again
Thiago Macieira
thiago.macieira at intel.com
Sat Jun 9 19:19:41 CEST 2012
On sábado, 9 de junho de 2012 19.15.09, Olivier Goffart wrote:
> I suggest re-ordering the offset in order to avoid padding.
It doesn't help.
> struct Q_CORE_EXPORT QArrayData
> {
> QtPrivate::RefCount ref;
> uint flags;
> qptrdiff offset; // in bytes from beginning of header
> int size; // ### move to the main class body?
> // 4 byte tail padding on 64 bits
>
> };
> // size is 16 / 24 bytes (but really 20 bytes as we could use the tail
> padding to put the payload already)
>
>
> struct QArrayAllocatedData : public QArrayData
> {
> uint alloc;
> };
> // size is 20 / 24 bytes (the tail padding bytes are used)
The size here is 20 / 32 bytes. The tail padding bytes are not used.
--
Thiago Macieira - thiago.macieira (AT) intel.com
Software Architect - Intel Open Source Technology Center
Intel Sweden AB - Registration Number: 556189-6027
Knarrarnäsgatan 15, 164 40 Kista, Stockholm, Sweden
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