95 lines
2.8 KiB
Rust
95 lines
2.8 KiB
Rust
//@ run-pass
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#![allow(dead_code)]
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#![allow(unused_assignments)]
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#![allow(unused_variables)]
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//@ ignore-emscripten no threads support
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//@ needs-unwind
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use std::thread;
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use std::sync::mpsc::{channel, Sender};
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#[derive(PartialEq, Debug)]
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enum Message {
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Dropped,
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DestructorRan
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}
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struct SendOnDrop {
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sender: Sender<Message>
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}
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impl Drop for SendOnDrop {
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fn drop(&mut self) {
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self.sender.send(Message::Dropped).unwrap();
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}
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}
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enum Foo {
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SimpleVariant(Sender<Message>),
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NestedVariant(Box<usize>, SendOnDrop, Sender<Message>),
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FailingVariant { on_drop: SendOnDrop }
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}
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impl Drop for Foo {
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fn drop(&mut self) {
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match self {
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&mut Foo::SimpleVariant(ref mut sender) => {
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sender.send(Message::DestructorRan).unwrap();
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}
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&mut Foo::NestedVariant(_, _, ref mut sender) => {
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sender.send(Message::DestructorRan).unwrap();
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}
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&mut Foo::FailingVariant { .. } => {
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panic!("Failed");
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}
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}
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}
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}
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pub fn main() {
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let (sender, receiver) = channel();
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{
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let v = Foo::SimpleVariant(sender);
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}
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assert_eq!(receiver.recv().unwrap(), Message::DestructorRan);
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assert_eq!(receiver.recv().ok(), None);
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let (sender, receiver) = channel();
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{
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let v = Foo::NestedVariant(Box::new(42), SendOnDrop { sender: sender.clone() }, sender);
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}
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assert_eq!(receiver.recv().unwrap(), Message::DestructorRan);
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assert_eq!(receiver.recv().unwrap(), Message::Dropped);
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assert_eq!(receiver.recv().ok(), None);
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let (sender, receiver) = channel();
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let t = thread::spawn(move|| {
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let v = Foo::FailingVariant { on_drop: SendOnDrop { sender: sender } };
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});
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assert_eq!(receiver.recv().unwrap(), Message::Dropped);
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assert_eq!(receiver.recv().ok(), None);
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drop(t.join());
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let (sender, receiver) = channel();
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let t = {
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thread::spawn(move|| {
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let mut v = Foo::NestedVariant(Box::new(42), SendOnDrop {
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sender: sender.clone()
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}, sender.clone());
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v = Foo::NestedVariant(Box::new(42),
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SendOnDrop { sender: sender.clone() },
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sender.clone());
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v = Foo::SimpleVariant(sender.clone());
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v = Foo::FailingVariant { on_drop: SendOnDrop { sender: sender } };
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})
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};
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assert_eq!(receiver.recv().unwrap(), Message::DestructorRan);
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assert_eq!(receiver.recv().unwrap(), Message::Dropped);
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assert_eq!(receiver.recv().unwrap(), Message::DestructorRan);
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assert_eq!(receiver.recv().unwrap(), Message::Dropped);
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assert_eq!(receiver.recv().unwrap(), Message::DestructorRan);
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assert_eq!(receiver.recv().unwrap(), Message::Dropped);
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assert_eq!(receiver.recv().ok(), None);
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drop(t.join());
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}
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