forked from rayon-rs/rayon
/
unwind.rs
35 lines (30 loc) · 1016 Bytes
/
unwind.rs
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//! 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 libc;
use std::any::Any;
use std::panic::{self, AssertUnwindSafe};
use std::io::stderr;
use std::io::prelude::*;
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 fn halt_unwinding<F, R>(func: F) -> thread::Result<R>
where F: FnOnce() -> R
{
panic::catch_unwind(AssertUnwindSafe(func))
}
pub fn resume_unwinding(payload: Box<Any + Send>) -> ! {
panic::resume_unwind(payload)
}
pub struct AbortIfPanic;
impl Drop for AbortIfPanic {
fn drop(&mut self) {
unsafe {
let _ = writeln!(&mut stderr(), "Rayon: detected unexpected panic; aborting");
libc::abort();
}
}
}