Comparing addresses of function pointers is brittle.
Functions may be duplicated resulting in function pointers to the same function to compare !=.
Functions may be merged/de-duplicated resulting in function pointers to different function to compare ==.
The later shouldn't be relevant here as the function differ in behavior, but mentioning it for completeness.
With it when using multiple Machine in one process only the first would store the pre-allocated error.
Instead Heap.resource_err_loc is now Option<NonZero<usize>> instead of usize using None for uninitialized.
The cell at index 0 should alredy be used by a runtime reserved interstitial cell that is allocated prior. So requiring the offset to be non zero should be fine.
- reserve the complete required length at the beginning to reduce reallocations
- use u8 instead of char so that we can re-use the allocation for the string
deref register to access stack variable for `directory_exists/1`
deref register to access stack variable for `directory_files/2`
deref register to access stack variable for `delete_directory/1`
deref register to access stack variable for `delete_file/1`
deref registers to access stack variable for `file_copy/2`
deref register to access stack variable for `file_exists/1`
deref register to access stack variable for `file_size/2`
deref register to access stack variable from `file_time` function
deref register to access stack variable for `make_directory/1`
deref register to access stack variable for `make_directory_path/1`
deref register to access stack variable for `path_canonical/2`
deref registers to access stack variables for `rename_file/2`
Signed-off-by: Thierry Marianne <thierry@marianne.io>
