1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 #![allow(dead_code)] // stack_guard isn't used right now on all platforms
17 stack_guard: Option<usize>,
21 thread_local! { static THREAD_INFO: RefCell<Option<ThreadInfo>> = RefCell::new(None) }
24 fn with<R, F>(f: F) -> Option<R> where F: FnOnce(&mut ThreadInfo) -> R {
25 THREAD_INFO.try_with(move |c| {
26 if c.borrow().is_none() {
27 *c.borrow_mut() = Some(ThreadInfo {
29 thread: Thread::new(None),
32 f(c.borrow_mut().as_mut().unwrap())
37 pub fn current_thread() -> Option<Thread> {
38 ThreadInfo::with(|info| info.thread.clone())
41 pub fn stack_guard() -> Option<usize> {
42 ThreadInfo::with(|info| info.stack_guard).and_then(|o| o)
45 pub fn set(stack_guard: Option<usize>, thread: Thread) {
46 THREAD_INFO.with(|c| assert!(c.borrow().is_none()));
47 THREAD_INFO.with(move |c| *c.borrow_mut() = Some(ThreadInfo{
48 stack_guard: stack_guard,