1 files changed, 29 insertions, 0 deletions
diff --git a/third_party/rust/interrupt-support/src/interruptee.rs b/third_party/rust/interrupt-support/src/interruptee.rs
new file mode 100644
index 0000000000..3ee6eadfe6
--- /dev/null
+++ b/third_party/rust/interrupt-support/src/interruptee.rs
@@ -0,0 +1,29 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+License, v. 2.0. If a copy of the MPL was not distributed with this
+* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use crate::Interrupted;
+
+/// Represents the state of something that may be interrupted. Decoupled from
+/// the interrupt mechanics so that things which want to check if they have been
+/// interrupted are simpler.
+pub trait Interruptee {
+    fn was_interrupted(&self) -> bool;
+
+    fn err_if_interrupted(&self) -> Result<(), Interrupted> {
+        if self.was_interrupted() {
+            return Err(Interrupted);
+        }
+        Ok(())
+    }
+}
+
+/// A convenience implementation, should only be used in tests.
+pub struct NeverInterrupts;
+
+impl Interruptee for NeverInterrupts {
+    #[inline]
+    fn was_interrupted(&self) -> bool {
+        false
+    }
+}