According to my understanding, PIPE is also a mem object.
clGetMemObjectInfo can be used to query all kinds of mem object.
clGetPipeInfo just query additional PIPE info.
According to CL spec, it just says query CL_MEM_HOST_PTR return
the host ptr if image/buffer created by CL_MEM_USE_HOST_PTR is specified,
otherwise, return NULL.
So, as a PIPE, I think it just retuns NULL and it that correct?
On Tue, Dec 20, 2016 at 09:05:41AM +0100, Simon Richter wrote:
> Date: Tue, 20 Dec 2016 09:05:41 +0100
> From: Simon Richter <simon.rich...@hogyros.de>
> To: beignet@lists.freedesktop.org
> Subject: Re: [Beignet] [PATCH] Refine mem.h and improve the related macro
> defination.
>
> Hi,
>
> On 20.12.2016 04:23, He Junyan wrote:
>
> >>> + if (!CL_OBJECT_IS_BUFFER(memobj)) {
>
> >> That would match pipes as well, is that intended?
>
> > Already redefine CL_OBJECT_IS_BUFFER to just match buffer and subbuffer.
>
> > +#define CL_OBJECT_IS_BUFFER(mem) ((mem &&
> > \
> > + ((cl_base_object)mem)->magic ==
> > CL_OBJECT_MEM_MAGIC && \
> > + CL_OBJECT_GET_REF(mem) >= 1 &&
> > \
> > + ((cl_mem)mem)->type <=
> > CL_MEM_SUBBUFFER_TYPE))
>
> Exactly my point. A pipe object would not match CL_OBJECT_IS_BUFFER(),
> so the negated test would return true, and the code would look at
> memobj->host_ptr in a pipe object, which is wrong.
>
> Simon
>
>
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