Re: about named address space

[Ian Lance Taylor <iant at google dot com>]

Rony Paul <ronypaul77@gmail.com> writes:

> and in my program if I write code like,
>  __ea int * p = malloc_ea(sizeof(int));
>    int * v;
>    p=v;
>
> this returns error message  "assignment from pointer to non-enclosed
> address space"
> so, this checking for pointer of the different address space is done
> for pointer. now if I want to add this check for data variable also,
> what should I do. I cant understand, would you please help me?
>
> ie. I want to write code like
>
> extern  int __ea x;
> int y;
>
> and it should give error message like
> "assignment from variable to non-enclosed address space"

I'm not aware of any support in current gcc for anything like that.  In
effect you are asking not for named address spaces, but for a brand new
type.  You want to permit pointers to your new type, but you don't want
to permit assignments between values of your new type and the old types.
I suspect that the most straightforward way to handle this would be to
do it entirely in the frontend, which is where types are handled.  I
suppose you could tie it into named address spaces to the extent that
you want values of your new type to be aggregated into specific areas in
memory.

In short I don't know of any easy way to do what you want.

Ian