On Thu, Mar 30, 2017 at 3:15 PM, Gabriel Becker
wrote:
> technically possible
So the garbage collector knows the buffer length independently of the
SEXPREC length field? Then, yes, its doable, but as you say not advisable.
THK
http://www.keittlab.org/
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On Thu, Mar 30, 2017 at 11:52 AM, Tim Keitt wrote:
>
> On Wed, Mar 29, 2017 at 4:56 PM, Gabriel Becker
> wrote:
>
>> The concept of having a vector which is a "window" into another vector
>> without duplication ( which I suspect is at least related to your use-case,
>> though I could be wrong) i
On Wed, Mar 29, 2017 at 4:56 PM, Gabriel Becker
wrote:
> The concept of having a vector which is a "window" into another vector
> without duplication ( which I suspect is at least related to your use-case,
> though I could be wrong) is a special case of one of alt-representations I
> have implem
Tim,
What you're describing is a special case of the ALTREP framework/API that
Luke Tierney, Tomas Kalibera, and I are working on putting into R. See my
initial proposal to the DSC here:
https://www.r-project.org/dsc/2016/slides/customvectors.html and the
subsequent branch here: https://svn.r-proj
http://www.keittlab.org/
On Wed, Mar 29, 2017 at 1:04 PM, Hervé Pagès wrote:
> Hi Tim,
>
> On 03/29/2017 08:24 AM, Tim Keitt wrote:
>
>> I have a use case where I would like to create an SEXP around an existing
>> buffer that is managed by R, thus avoiding a copy operation.
>>
>
> What to you me
On 03/29/2017 11:04 AM, Hervé Pagès wrote:
Hi Tim,
On 03/29/2017 08:24 AM, Tim Keitt wrote:
I have a use case where I would like to create an SEXP around an existing
buffer that is managed by R, thus avoiding a copy operation.
What to you mean exactly by "an existing buffer managed by R"?
I
Hi Tim,
On 03/29/2017 08:24 AM, Tim Keitt wrote:
I have a use case where I would like to create an SEXP around an existing
buffer that is managed by R, thus avoiding a copy operation.
What to you mean exactly by "an existing buffer managed by R"?
If I have
something like:
void *p = (void*)
I have a use case where I would like to create an SEXP around an existing
buffer that is managed by R, thus avoiding a copy operation. If I have
something like:
void *p = (void*) RAW(PROTECT(Rf_allocVector(RAWSXP, n)));
... additional maniupulation ...
SEXP x = somefunc(SXPTYPE, n, p); //
I
