blob: 90ccc589b4ea7378667a788541a1285349209a00 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
// Copyright 2017 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.
#![feature(const_fn)]
#![feature(thread_local)]
#![feature(cfg_target_thread_local, thread_local_internals)]
type Foo = std::cell::RefCell<String>;
#[cfg(target_thread_local)]
#[thread_local]
static __KEY: std::thread::__FastLocalKeyInner<Foo> =
std::thread::__FastLocalKeyInner::new();
#[cfg(not(target_thread_local))]
static __KEY: std::thread::__OsLocalKeyInner<Foo> =
std::thread::__OsLocalKeyInner::new();
fn __getit() -> std::option::Option<
&'static std::cell::UnsafeCell<
std::option::Option<Foo>>>
{
__KEY.get() //~ ERROR call to unsafe function requires unsafe
}
static FOO: std::thread::LocalKey<Foo> =
std::thread::LocalKey::new(__getit, Default::default);
//~^ ERROR call to unsafe function requires unsafe
fn main() {
FOO.with(|foo| println!("{}", foo.borrow()));
std::thread::spawn(|| {
FOO.with(|foo| *foo.borrow_mut() += "foo");
}).join().unwrap();
FOO.with(|foo| println!("{}", foo.borrow()));
}
|
