| // Copyright 2012 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| #![crate_name="externcallback"] |
| #![crate_type = "lib"] |
| #![feature(libc)] |
| |
| extern crate libc; |
| |
| pub mod rustrt { |
| extern crate libc; |
| |
| #[link(name = "rust_test_helpers", kind = "static")] |
| extern { |
| pub fn rust_dbg_call(cb: extern "C" fn(libc::uintptr_t) -> libc::uintptr_t, |
| data: libc::uintptr_t) |
| -> libc::uintptr_t; |
| } |
| } |
| |
| pub fn fact(n: libc::uintptr_t) -> libc::uintptr_t { |
| unsafe { |
| println!("n = {}", n); |
| rustrt::rust_dbg_call(cb, n) |
| } |
| } |
| |
| pub extern fn cb(data: libc::uintptr_t) -> libc::uintptr_t { |
| if data == 1 { |
| data |
| } else { |
| fact(data - 1) * data |
| } |
| } |
