aptr(l) is an atomic pointer. I believe you can cast between prl(l) and
aptr(l) though my C is not particularly good.
And thanks! I'll have a look :)
On 09/03/2018 09:09 PM, Hongwei Xi wrote:
> What is aptr(l)?
>
> Here is some code that may be helpful:
>
> extern
> fun
> {a:vt0p}
>
If you just want to pass a value via call-by-reference, you can do
fun{a:vt@ype}
foo(x: a): ... = let
var x = x
// now the name 'x' refers to a variable, which is a form of left-value
// that can be passed via call-by-reference
... ...
On Mon, Sep 3, 2018 at 10:09 PM Hongwei Xi wrote:
What is aptr(l)?
Here is some code that may be helpful:
extern
fun
{a:vt0p}
ptr_alloc((*void*))
:<> [l:agz] (a? @ l, mfree_gc_v(l) | ptr(l))
// end of [ptr_alloc]
extern
fn
{a:vt@ype}
as_view(a):
[l:addr | l > null]
(a @ l, mfree_gc_v(l) | ptr(l))
implement
{a}
as_view(x) = let
val
Is there any way to implement
extern
fn {a:vt@ype} as_view (a) : [ l : addr | l > null ] (a @ l | aptr(l))
extern
fn {a:vt@ype} as_value {l:addr} ((a @ l | aptr(l))) : a
?
I've tried using view@ and addr@ but it seems they're for stack
allocations. I suppose I could write my own view in place
