diff options
Diffstat (limited to 'src/test/ui/threads-sendsync/tls-init-on-init.rs')
-rw-r--r-- | src/test/ui/threads-sendsync/tls-init-on-init.rs | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/test/ui/threads-sendsync/tls-init-on-init.rs b/src/test/ui/threads-sendsync/tls-init-on-init.rs new file mode 100644 index 000000000..193c18151 --- /dev/null +++ b/src/test/ui/threads-sendsync/tls-init-on-init.rs @@ -0,0 +1,44 @@ +// run-pass +#![allow(stable_features)] + +// ignore-emscripten no threads support + +#![feature(thread_local_try_with)] + +use std::thread; +use std::sync::atomic::{AtomicUsize, Ordering}; + +struct Foo { cnt: usize } + +thread_local!(static FOO: Foo = Foo::init()); + +static CNT: AtomicUsize = AtomicUsize::new(0); + +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(); +} |