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#![allow(dead_code)]
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>> = RefCell::new(None) }
impl ThreadInfo {
fn with<R, F>(f: F) -> Option<R> where F: FnOnce(&mut ThreadInfo) -> R {
THREAD_INFO.try_with(move |c| {
if c.borrow().is_none() {
*c.borrow_mut() = Some(ThreadInfo {
stack_guard: None,
thread: Thread::new(None),
})
}
f(c.borrow_mut().as_mut().unwrap())
}).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(|c| assert!(c.borrow().is_none()));
THREAD_INFO.with(move |c| *c.borrow_mut() = Some(ThreadInfo{
stack_guard,
thread,
}));
}
pub fn reset_guard(stack_guard: Option<Guard>) {
THREAD_INFO.with(move |c| c.borrow_mut().as_mut().unwrap().stack_guard = stack_guard);
}