From d1c89a828dabf0719fc3061b60bc4b48752c5b98 Mon Sep 17 00:00:00 2001
From: Daniel Franklin <daniel@danielzfranklin.org>
Date: Thu, 25 Mar 2021 20:06:24 +0000
Subject: [PATCH] Update src/send-and-sync.md

Co-authored-by: Daniel Henry-Mantilla <daniel.henry.mantilla@gmail.com>
---
 src/send-and-sync.md | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/src/send-and-sync.md b/src/send-and-sync.md
index 97e8b24..1e2bb04 100644
--- a/src/send-and-sync.md
+++ b/src/send-and-sync.md
@@ -84,10 +84,16 @@ implement Send and Sync. Let's call it a `Carton`.
 We start by writing code to take a value allocated on the stack and transfer it
 to the heap.
 
-```rust,ignore
-use std::mem::size_of;
-use std::ptr;
-
+```rust
+# mod libc {
+#     pub use ::std::os::raw::{c_int, c_void, size_t};
+#     extern "C" { pub fn posix_memalign(memptr: *mut *mut c_void, align: size_t, size: size_t) -> c_int; }
+# }
+use std::{
+    mem::{align_of, size_of},
+    ptr,
+};
+use libc::c_void;
 struct Carton<T>(ptr::NonNull<T>);
 
 impl<T> Carton<T> {