1 //! Package up unwind recovery. Note that if you are in some sensitive
2 //! place, you can use the `AbortIfPanic` helper to protect against
3 //! accidental panics in the rayon code itself.
4 
5 use std::any::Any;
6 use std::panic::{self, AssertUnwindSafe};
7 use std::thread;
8 
9 /// Executes `f` and captures any panic, translating that panic into a
10 /// `Err` result. The assumption is that any panic will be propagated
11 /// later with `resume_unwinding`, and hence `f` can be treated as
12 /// exception safe.
halt_unwinding<F, R>(func: F) -> thread::Result<R> where F: FnOnce() -> R,13 pub(super) fn halt_unwinding<F, R>(func: F) -> thread::Result<R>
14 where
15     F: FnOnce() -> R,
16 {
17     panic::catch_unwind(AssertUnwindSafe(func))
18 }
19 
resume_unwinding(payload: Box<dyn Any + Send>) -> !20 pub(super) fn resume_unwinding(payload: Box<dyn Any + Send>) -> ! {
21     panic::resume_unwind(payload)
22 }
23 
24 pub(super) struct AbortIfPanic;
25 
26 impl Drop for AbortIfPanic {
drop(&mut self)27     fn drop(&mut self) {
28         eprintln!("Rayon: detected unexpected panic; aborting");
29         ::std::process::abort();
30     }
31 }
32