Function RHASH_EMPTY_P 

pub unsafe fn RHASH_EMPTY_P(obj: VALUE) -> bool

Check if hash is empty (akin to RHASH_EMPTY_P).

@param[in] obj A Ruby Hash object. @retval true The hash has no entries. @retval false The hash has at least one entry.

Safety

This function is unsafe because it dereferences a raw pointer to access underlying Ruby data. The caller must ensure the VALUE is a valid Hash.