Function package_init 

pub unsafe fn package_init(dll: *mut DllInfo, pkg_name: &CStr)

Initialize a miniextendr R package.

This performs all initialization steps in the correct order:

1. Install panic hook for better error messages
2. Record main thread ID (and optionally spawn worker thread)
3. Assert UTF-8 locale
4. Set ALTREP package name
5. Register mx_abi C-callables for cross-package trait dispatch
6. Register all #[miniextendr] routines and ALTREP classes
7. Lock down dynamic symbols

Safety

Must be called from R’s main thread during R_init_*. dll must be a valid pointer provided by R. pkg_name must be a valid null-terminated C string that lives for the duration of the R session (typically a string literal).