On Tuesday, August 2, 2016 at 7:39:16 AM UTC-4, [email protected] wrote:
>
> Hi All,
> I am trying to bind a fortran library for optimization (
> http://napsu.karmitsa.fi/lmbm/) to Julia.
> To do so, I would like to get a pointer to function written in Julia,
> which I try to do as
>
> function fOpt(x::Array{Float64,1},g::Array{Float64,1})
> fill!(g,1.0);
> convert(Cdouble,sum(x))::Cdouble
> end
> const fOptPtr = cfunction(fOpt, Cdouble, (Ptr{Cdouble}, Ptr{Cdouble}))
>
>
An Array{T} is not the same thing as a Ptr{T}.
You need to declare fOpt to take Ptr{Cdouble} arguments. You can use the
pointer_to_array function to convert pointers to Arrays. (However, you
need to know the length of the array; I'm surprised that the length is not
passed as an argument — are you supposed to use a global?)
