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#![allow(dead_code)] // stack_guard isn't used right now on all platforms
#![allow(unused_unsafe)] // thread_local with `const {}` triggers this liny
use crate::cell::RefCell;
use crate::sys::thread::guard::Guard;
use crate::thread::Thread;
struct ThreadInfo {
stack_guard: Option<Guard>,
thread: Thread,
}
thread_local! { static THREAD_INFO: RefCell<Option<ThreadInfo>> = const { RefCell::new(None) } }
impl ThreadInfo {
fn with<R, F>(f: F) -> Option<R>
where
F: FnOnce(&mut ThreadInfo) -> R,
{
THREAD_INFO
.try_with(move |thread_info| {
let mut thread_info = thread_info.borrow_mut();
let thread_info = thread_info.get_or_insert_with(|| ThreadInfo {
stack_guard: None,
thread: Thread::new(None),
});
f(thread_info)
})
.ok()
}
}
pub fn current_thread() -> Option<Thread> {
ThreadInfo::with(|info| info.thread.clone())
}
pub fn stack_guard() -> Option<Guard> {
ThreadInfo::with(|info| info.stack_guard.clone()).and_then(|o| o)
}
pub fn set(stack_guard: Option<Guard>, thread: Thread) {
THREAD_INFO.with(move |thread_info| {
let mut thread_info = thread_info.borrow_mut();
rtassert!(thread_info.is_none());
*thread_info = Some(ThreadInfo { stack_guard, thread });
});
}
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