Hi Andreas,
> Le 14 mai 2020 à 00:07, Andreas Kloeckner <li...@informa.tiker.net> a écrit :
>
> Vincent Favre-Nicolin <fa...@esrf.fr> writes:
>> 1) if there is a way to have an element-wise kernel with
>> no_extern_c=True - but I don’t know how to resolve the name mangling
>> issue to access the kernel function ?
>>
>> 2) add a ‘cpp_preamble’ option to SourceModule and ElementwiseKernel
>> (and others) to add a preamble before the ‘extern “C”’
>
> 1) would be the preferred option from my perspective. Simply sticking an
> "extern "C" in front of the kernel declaration would likely
> suffice. There is a backward compatibility concern here for other
> potentially mangled names in the preamble, but ElementwiseKernel doesn't
> really expose the SourceModule, so it's IMO unlikely that someone tried
> to get those symbols.
OK, so if I understand this would mean calling SourceModule with
no_extern_c=True, and inserting the extern "C" as:
"""
#include <pycuda-complex.hpp>
%(preamble)s
extern “C"
__global__ void %(name)s(%(arguments)s)
{
(…)
%(operation)s;
(…)
}
“””
Ok, That’s indeed much simpler - I see that’s how the reduction kernel
works, I had not seen that.
I have submitted a PR.
Thanks !
Vincent
—
Vincent Favre-Nicolin
Co-editor, J. Synchrotron Radiation http://journals.iucr.org/s/
<http://journals.iucr.org/s/>
Director, HERCULES school http://hercules-school.eu
<http://hercules-school.eu/>
ESRF-The European Synchrotron http://www.esrf.eu <http://www.esrf.eu/>
71, Avenue des Martyrs
Grenoble, France
X-Ray NanoProbe (XNP) group
Tel: +33 4 76 88 28 11
On leave from Univ. Grenoble Alpes
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