Re: [Chicken-users] do byte-vectors move arround ?

[felix winkelmann]

On 10/8/06, John Janecek <address@hidden> wrote:
> (define bv (string->byte-vector "some sort of string"))
> I then have to pass bv to a C function
>
> The C function just reads the data.
> But it requires that the data does not move
>
> Does byte-vector payload move ?
> or do I need to use static-byte-vector ?

Yes, when a garbage collection occurs, the string contents
may move to a different address. GC's only occur
during callbacks to Scheme, or when you store (Scheme) strings
in C globals and access them during separate invocations of C
code.

A static byte vector would indeed be a solution, the contents do not
move, but you have to release them manually, of course.


cheers,
felix


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