| // Copyright 2015 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. |
| |
| // ignore-emscripten no threads support |
| |
| #![feature(thread_local_state)] |
| |
| use std::thread::{self, LocalKeyState}; |
| use std::sync::atomic::{AtomicUsize, Ordering, ATOMIC_USIZE_INIT}; |
| |
| struct Foo { cnt: usize } |
| |
| thread_local!(static FOO: Foo = Foo::init()); |
| |
| static CNT: AtomicUsize = ATOMIC_USIZE_INIT; |
| |
| impl Foo { |
| fn init() -> Foo { |
| let cnt = CNT.fetch_add(1, Ordering::SeqCst); |
| if cnt == 0 { |
| FOO.with(|_| {}); |
| } |
| Foo { cnt: cnt } |
| } |
| } |
| |
| impl Drop for Foo { |
| fn drop(&mut self) { |
| if self.cnt == 1 { |
| FOO.with(|foo| assert_eq!(foo.cnt, 0)); |
| } else { |
| assert_eq!(self.cnt, 0); |
| match FOO.state() { |
| LocalKeyState::Valid => panic!("should not be in valid state"), |
| LocalKeyState::Uninitialized | |
| LocalKeyState::Destroyed => {} |
| } |
| } |
| } |
| } |
| |
| fn main() { |
| thread::spawn(|| { |
| FOO.with(|_| {}); |
| }).join().unwrap(); |
| } |