PICCA Frederic-Emmanuel
Hello, I need to call a c method which take a const char *
something like
void hkl_holder_add_axis(const struct holder *holder, const char *name);
during all the life of this object, the const char* should be accessible.
So from haskell I need to create a CString which will not be affected by the garbage collection. The memory should be release only when the given object is freed. or when the program stop.
when I use alloca, the memory is releases and the code segfault.
I think that I could use malloc, but in that case I have a memory leak. (this is not that important in my case, since I create less than 10 of these objects).
Maybe a ForeignPtr can help here: it allows to attach a finalizer, which you can use to free the CString once the object is GCed in Haskell. https://hackage.haskell.org/package/base-4.18.0.0/docs/Foreign-ForeignPtr.ht... -- Albert Krewinkel GPG: 8eed e3e2 e8c5 6f18 81fe e836 388d c0b2 1f63 1124