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use crate::loom::sync::atomic::{AtomicBool, Ordering};
use crate::loom::sync::{Barrier, Mutex};
use crate::runtime::dump::Dump;
use crate::runtime::scheduler::multi_thread_alt::Handle;
use crate::sync::notify::Notify;
/// Tracing status of the worker.
pub(super) struct TraceStatus {
pub(super) trace_requested: AtomicBool,
pub(super) trace_start: Barrier,
pub(super) trace_end: Barrier,
pub(super) result_ready: Notify,
pub(super) trace_result: Mutex<Option<Dump>>,
}
impl TraceStatus {
pub(super) fn new(remotes_len: usize) -> Self {
Self {
trace_requested: AtomicBool::new(false),
trace_start: Barrier::new(remotes_len),
trace_end: Barrier::new(remotes_len),
result_ready: Notify::new(),
trace_result: Mutex::new(None),
}
}
pub(super) fn trace_requested(&self) -> bool {
self.trace_requested.load(Ordering::Relaxed)
}
pub(super) async fn start_trace_request(&self, handle: &Handle) {
while self
.trace_requested
.compare_exchange(false, true, Ordering::Acquire, Ordering::Relaxed)
.is_err()
{
handle.notify_all();
crate::task::yield_now().await;
}
}
pub(super) fn stash_result(&self, dump: Dump) {
let _ = self.trace_result.lock().insert(dump);
self.result_ready.notify_one();
}
pub(super) fn take_result(&self) -> Option<Dump> {
self.trace_result.lock().take()
}
pub(super) async fn end_trace_request(&self, handle: &Handle) {
while self
.trace_requested
.compare_exchange(true, false, Ordering::Acquire, Ordering::Relaxed)
.is_err()
{
handle.notify_all();
crate::task::yield_now().await;
}
}
}
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