typedef struct _ffi_type { size_t size; unsigned short alignment; unsigned short type; struct _ffi_type **elements; } ffi_type;
enum which maps the ffi_abi enum
ffi_abi
See doc:
typedef enum { FFI_OK = 0, FFI_BAD_TYPEDEF, FFI_BAD_ABI, FFI_BAD_ARGTYPE } ffi_status;