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use std::cell::{Cell, RefCell};
use std::sync::{Arc, Mutex};
use std::thread;
use std::time::Duration;
#[test]
#[cfg_attr(any(target_os = "emscripten", target_os = "wasi"), ignore)] // no threads
#[cfg_attr(miri, ignore)] // Miri does not like the thread leak
fn sleep_very_long() {
let finished = Arc::new(Mutex::new(false));
let t_finished = finished.clone();
thread::spawn(move || {
thread::sleep(Duration::new(u64::MAX, 0));
*t_finished.lock().unwrap() = true;
});
thread::sleep(Duration::from_millis(100));
assert_eq!(*finished.lock().unwrap(), false);
}
#[test]
fn thread_local_containing_const_statements() {
// This exercises the `const $init:block` cases of the thread_local macro.
// Despite overlapping with expression syntax, the `const { ... }` is not
// parsed as `$init:expr`.
thread_local! {
static CELL: Cell<u32> = const {
let value = 1;
Cell::new(value)
};
static REFCELL: RefCell<u32> = const {
let value = 1;
RefCell::new(value)
};
}
assert_eq!(CELL.get(), 1);
assert_eq!(REFCELL.take(), 1);
}
#[test]
fn thread_local_hygeiene() {
// Previously `thread_local_inner!` had use imports for `LocalKey`, `Storage`, `EagerStorage`
// and `LazyStorage`. The use imports will shadow a user-provided type or type alias if the
// user-provided type or type alias has the same name. Make sure that this does not happen. See
// <https://github.com/rust-lang/rust/issues/131863>.
//
// NOTE: if the internal implementation details change (i.e. get renamed), this test should be
// updated.
#![allow(dead_code)]
type LocalKey = ();
type Storage = ();
type LazyStorage = ();
type EagerStorage = ();
thread_local! {
static A: LocalKey = const { () };
static B: Storage = const { () };
static C: LazyStorage = const { () };
static D: EagerStorage = const { () };
}
}
#[test]
// Include an ignore list on purpose, so that new platforms don't miss it
#[cfg_attr(
any(
target_os = "redox",
target_os = "l4re",
target_env = "sgx",
target_os = "solid_asp3",
target_os = "teeos",
target_os = "wasi"
),
should_panic
)]
fn available_parallelism() {
// check that std::thread::available_parallelism() returns a valid value
assert!(thread::available_parallelism().is_ok());
}
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