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Throw an error before using at-cfunction with closures on unsupported platforms. #170

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Oct 30, 2019
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Throw an error before using at-cfunction with closures on unsupported platforms. #170

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4 changes: 3 additions & 1 deletion src/occupancy.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -50,10 +50,12 @@ function launch_configuration(fun::CuFunction; shmem=0, max_threads::Integer=0)
threads_ref = Ref{Cint}()
if isa(shmem, Integer)
cuOccupancyMaxPotentialBlockSize(blocks_ref, threads_ref, fun, C_NULL, shmem, max_threads)
else
elseif Sys.ARCH == :x86 || Sys.ARCH == :x86_64
shmem_cint = threads -> Cint(shmem(threads))
cb = @cfunction($shmem_cint, Cint, (Cint,))
cuOccupancyMaxPotentialBlockSize(blocks_ref, threads_ref, fun, cb, 0, max_threads)
else
error("launch_configuration with a shmem callback is not supported on your architecture")
end
return (blocks=blocks_ref[], threads=threads_ref[])
end