You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: lib.rs
    path of file: ./repos/wasmtime/crates/jit-icache-coherence/src
    
    the code of the file until where you have to start completion: //! This crate provides utilities for inst
    
//! # fn main() -> io::Result<()> {
//! #
//! # let run_code = || {};
//! # let code = vec![0u8; 64];
//! # let newly_written_pages = vec![Page {
//! #    addr: &code[0] as *const u8 as *const c_void,
//! #    len: code.len(),
//! # }];
//! # unsafe {
//! // Invalidate the cache for all the newly written pages where we wrote our new code.
//! for page in newly_written_pages {
//!     clear_cache(page.addr, page.len)?;
//! }
//!
//! // Once those are invalidated we also need to flush the pipeline
//! pipeline_flush_mt()?;
//!
//! // We can now safely execute our new code.
//! run_code();
//! # }
//! # Ok(())
//! # }