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// 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.
// run-pass
#![allow(stable_features)]
// ignore-emscripten no threads support
#![feature(thread_local_try_with)]
use std::thread;
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);
if FOO.try_with(|_| ()).is_ok() {
panic!("should not be in valid state");
}
}
}
}
fn main() {
thread::spawn(|| {
FOO.with(|_| {});
}).join().unwrap();
}
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