Hi, I’m using ccall on a C library that returns a pointer to some data that was malloced in the library and requires a separate API call to close the resource that the data came from. The dataset could be quite large (a couple of GB) so I’d rather use unsafe_wrap in julia, but I’m not familiar with …

Example of registering a finalizer for unsafe_wrapped data from ccall

fatteneder November 11, 2024, 3:14pm 2

Should be

return finalizer(dataRef) do ref
   closefunc()
end

Topic		Replies	Views
Properly using `finalizer`, `ccall`, `cconvert` and `unsafe_convert` General Usage question , ccall	13	3316	October 3, 2017
Finalizer only works with mutable structs? General Usage	74	3723	December 21, 2019
RAII and wrapping a C library General Usage ccall , memory-allocation	2	1213	December 26, 2017
Garbage collector and memory management New to Julia	2	1010	February 12, 2019
Finalizer and atexit for C library wrappers General Usage question , atexit	4	1146	January 21, 2017