Re: [Qemu-devel] What's IOMMUMemoryRegion's super?

[Paolo Bonzini]

On 03/07/19 07:05, Markus Armbruster wrote:
>     static const TypeInfo iommu_memory_region_info = {
>         .parent             = TYPE_MEMORY_REGION,
>         .name               = TYPE_IOMMU_MEMORY_REGION,
>         .class_size         = sizeof(IOMMUMemoryRegionClass),
>         .instance_size      = sizeof(IOMMUMemoryRegion),
>         .instance_init      = iommu_memory_region_initfn,
>         .abstract           = true,
>     };
> 
>     typedef struct IOMMUMemoryRegionClass {
>         /* private */
> --->    struct DeviceClass parent_class;
>         [...]
>     };
> 
>     struct IOMMUMemoryRegion {
>         MemoryRegion parent_obj;
>         [...]
>     };
> 
> The parent is TYPE_MEMORY_REGION, and the instance struct's first member is
> TYPE_MEMORY_REGION's instance struct as I expect, but the class struct's
> first member is something else entirely.

Cut-and-paste error.  MemoryRegion adds no methods so that could be
either ObjectClass or better

    typedef struct MemoryRegionClass {
        /* private */
        ObjectClass parent_class;
    } ObjectClass;

Paolo