1 files changed, 31 insertions, 0 deletions
diff --git a/vendor/rayon-core/src/unwind.rs b/vendor/rayon-core/src/unwind.rs
new file mode 100644
index 000000000..9671fa578
--- /dev/null
+++ b/vendor/rayon-core/src/unwind.rs
@@ -0,0 +1,31 @@
+//! Package up unwind recovery. Note that if you are in some sensitive
+//! place, you can use the `AbortIfPanic` helper to protect against
+//! accidental panics in the rayon code itself.
+
+use std::any::Any;
+use std::panic::{self, AssertUnwindSafe};
+use std::thread;
+
+/// Executes `f` and captures any panic, translating that panic into a
+/// `Err` result. The assumption is that any panic will be propagated
+/// later with `resume_unwinding`, and hence `f` can be treated as
+/// exception safe.
+pub(super) fn halt_unwinding<F, R>(func: F) -> thread::Result<R>
+where
+    F: FnOnce() -> R,
+{
+    panic::catch_unwind(AssertUnwindSafe(func))
+}
+
+pub(super) fn resume_unwinding(payload: Box<dyn Any + Send>) -> ! {
+    panic::resume_unwind(payload)
+}
+
+pub(super) struct AbortIfPanic;
+
+impl Drop for AbortIfPanic {
+    fn drop(&mut self) {
+        eprintln!("Rayon: detected unexpected panic; aborting");
+        ::std::process::abort();
+    }
+}