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: memory_creator.rs
    path of file: ./repos/wasmtime/tests/all
    
    the code of the file until where you have to start completion: #[cfg(all(not(target_os = "windows"), not(miri)))]
mod not_for_windows {
    use wasmtime::*;
    use wasmtime_environ::{WASM32_MAX_PAGES, WASM_PAGE_SIZE};

    use rustix::mm::{mmap_anonymous, mpr
    
    fn host_memory_grow() -> anyhow::Result<()> {
        let (mut store, mem_creator) = config();
        let module = Module::new(
            store.engine(),
            r#"
            (module
                (func $f (drop (memory.grow (i32.const 1))))
                (memory (export "memory") 1 2)
                (start $f)
            )
        "#,
        )?;

        Instance::new(&mut store, &module, &[])?;
        let instance2 = Instance::new(&mut store, &module, &[])?;

        assert_eq!(*mem_creator.num_created_memories.lock().unwrap(), 2);

        assert_eq!(
            instance2
                .get_memory(&mut store, "memory")
                .unwrap()
                .size(&store),
            2
        );

        // we take the lock outside the assert, so it won't get poisoned on assert failure
        let tot_pages = *mem_creator.num_total_bytes.lock().unwrap();
        assert_eq!(tot_pages, (4 * WASM_PAGE_SIZE) as usize);

        drop(store);
        let tot_pages = *mem_creator.num_total_bytes.lock().unwrap();
        assert_eq!(tot_pages, 0);

        Ok(())
    }