Returns an external pointer that can be passed to compiled C code
as user data for trampolines. Keep this handle (and the original
tcc_callback) alive for as long as C may call back.
The pointer handle keeps the underlying token alive until it is garbage
collected, even if the original callback is closed.
Details
Pointer arguments and return values are treated as external pointers.
Use tcc_read_bytes(), tcc_read_u8(), or tcc_read_f64()
to inspect pointed data when needed.