1 files changed, 27 insertions, 0 deletions
diff --git a/third_party/rust/tokio/src/runtime/metrics/scheduler.rs b/third_party/rust/tokio/src/runtime/metrics/scheduler.rs
new file mode 100644
index 0000000000..d1ba3b6442
--- /dev/null
+++ b/third_party/rust/tokio/src/runtime/metrics/scheduler.rs
@@ -0,0 +1,27 @@
+use crate::loom::sync::atomic::{AtomicU64, Ordering::Relaxed};
+
+/// Retrieves metrics from the Tokio runtime.
+///
+/// **Note**: This is an [unstable API][unstable]. The public API of this type
+/// may break in 1.x releases. See [the documentation on unstable
+/// features][unstable] for details.
+///
+/// [unstable]: crate#unstable-features
+#[derive(Debug)]
+pub(crate) struct SchedulerMetrics {
+    /// Number of tasks that are scheduled from outside the runtime.
+    pub(super) remote_schedule_count: AtomicU64,
+}
+
+impl SchedulerMetrics {
+    pub(crate) fn new() -> SchedulerMetrics {
+        SchedulerMetrics {
+            remote_schedule_count: AtomicU64::new(0),
+        }
+    }
+
+    /// Increment the number of tasks scheduled externally
+    pub(crate) fn inc_remote_schedule_count(&self) {
+        self.remote_schedule_count.fetch_add(1, Relaxed);
+    }
+}