AFAIK no need to flatten. Since Isaiah didn't advertise it himself, I'll mention his Clang.jl package, which I've found to be a big help in such situations. It's just possible you may not need any C glue code.
--Tim On Sunday, November 16, 2014 12:15:50 PM Erik Schnetter wrote: > Thanks for the pointers on immutable types. > > Is it possible to access structs inside structs this way? That a > struct inside a struct, not a pointer inside a struct. Is an immutable > type again a bits type? Or do I need to flatten the structs to make > this work? > > -erik > > On Sun, Nov 16, 2014 at 11:16 AM, Isaiah Norton <[email protected]> wrote: > >> The library defines some C structs that are part of the API. My > >> current approach uses wrapper C functions to access struct elements. > >> Is there a better way? > > > > It depends how complicated are the structs. Structs can often be reflected > > as Julia types, as long as isbits(TypeName) == true, and accessed with > > unsafe_load (see for example PyCall's definitions of PyObject_*). Some > > tricky spots include fixed-size arrays and unions (strictly speaking you > > can make an aggregate element having the maximal size in the union, and > > then do bitshifts manually. but there is no automatic support). > > > > There is also the StrPack.jl package, which calculates the appropriate > > memory layout for a given struct and provides > > serialization/deserialization.> > >> I thus I need to build this wrapper file as well. I created a > >> SimpleBuild rule for this. However, I need to know the path where > >> BinDeps installed (or found) the header files so that I can compile > >> this file. How do I access this information? > > > > This is going to be package-manager and build-tool specific, and I don't > > know if there is any abstraction/helper for includes in BinDeps yet. > > > > On Sun, Nov 16, 2014 at 10:09 AM, Erik Schnetter <[email protected]> > > > > wrote: > >> I want to wrap a library (hwloc) for Julia. This is working fine. > >> > >> The library defines some C structs that are part of the API. My > >> current approach uses wrapper C functions to access struct elements. > >> Is there a better way? > >> > >> I thus I need to build this wrapper file as well. I created a > >> SimpleBuild rule for this. However, I need to know the path where > >> BinDeps installed (or found) the header files so that I can compile > >> this file. How do I access this information? > >> > >> -erik > >> > >> -- > >> Erik Schnetter <[email protected]> > >> http://www.perimeterinstitute.ca/personal/eschnetter/
