rust/src/test/run-pass/task-killjoin.rs

// xfail-win32

// Create a task that is supervised by another task, join the supervised task
// from the supervising task, then fail the supervised task. The supervised
// task will kill the supervising task, waking it up. The supervising task no
// longer needs to be wakened when the supervised task exits.

use std;
import task;

fn supervised() {
    // Yield to make sure the supervisor joins before we fail. This is
    // currently not needed because the supervisor runs first, but I can
    // imagine that changing.
    task::yield();
    fail;
}

fn supervisor() {
    // Unsupervise this task so the process doesn't return a failure status as
    // a result of the main task being killed.
    let f = supervised;
    task::try({|| supervised() });
}

fn main() {
    let builder = task::builder();
    task::unsupervise(builder);
    task::run(builder, {|| supervisor(); })
}

// Local Variables:
// mode: rust;
// fill-column: 78;
// indent-tabs-mode: nil
// c-basic-offset: 4
// buffer-file-coding-system: utf-8-unix
// End: