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38 lines
588 B
Rust
38 lines
588 B
Rust
//@ run-pass
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//@ needs-threads
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use std::cell::Cell;
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use std::thread;
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#[derive(Default)]
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struct Foo {
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ptr: Cell<*const Foo>,
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}
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impl Foo {
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fn touch(&self) {
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if self.ptr.get().is_null() {
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self.ptr.set(self);
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} else {
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assert!(self.ptr.get() == self);
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}
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}
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}
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impl Drop for Foo {
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fn drop(&mut self) {
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self.touch();
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}
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}
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thread_local!(static FOO: Foo = Foo::default());
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fn main() {
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thread::spawn(|| {
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FOO.with(|foo| foo.touch());
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FOO.with(|foo| foo.touch());
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})
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.join()
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.unwrap();
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}
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