32 lines
900 B
Rust
32 lines
900 B
Rust
#![feature(const_fn)]
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#![feature(thread_local)]
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#![feature(cfg_target_thread_local, thread_local_internals)]
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type Foo = std::cell::RefCell<String>;
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#[cfg(target_thread_local)]
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#[thread_local]
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static __KEY: std::thread::__FastLocalKeyInner<Foo> =
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std::thread::__FastLocalKeyInner::new();
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#[cfg(not(target_thread_local))]
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static __KEY: std::thread::__OsLocalKeyInner<Foo> =
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std::thread::__OsLocalKeyInner::new();
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fn __getit() -> std::option::Option<&'static Foo>
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{
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__KEY.get(Default::default) //~ ERROR call to unsafe function is unsafe
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}
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static FOO: std::thread::LocalKey<Foo> =
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std::thread::LocalKey::new(__getit);
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//~^ ERROR call to unsafe function is unsafe
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fn main() {
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FOO.with(|foo| println!("{}", foo.borrow()));
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std::thread::spawn(|| {
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FOO.with(|foo| *foo.borrow_mut() += "foo");
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}).join().unwrap();
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FOO.with(|foo| println!("{}", foo.borrow()));
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}
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