70 lines
1.7 KiB
Rust
70 lines
1.7 KiB
Rust
// xfail-test
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// A port of task-killjoin to use a resource to manage
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// the join.
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use std;
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import task;
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fn joinable(f: fn()) -> (task::task, comm::port<bool>) {
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resource notify(data: (comm::chan<bool>,
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@mutable bool)) {
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let (c, v) = data;
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#error["notify: task=%d v=%x unwinding=%b b=%b",
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task::get_task(),
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ptr::addr_of(*v) as uint,
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task::currently_unwinding(),
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*v];
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comm::send(c, *v);
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}
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fn wrapper(pair: (comm::chan<bool>, fn())) {
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let (c, f) = pair;
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let b = @mutable false;
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#error["wrapper: task=%d allocated v=%x",
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task::get_task(),
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ptr::addr_of(*b) as uint];
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let _r = notify((c, b));
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f();
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*b = true;
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}
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let p = comm::port();
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let c = comm::chan(p);
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let t = task::spawn {|| wrapper((c, f)) };
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ret (t, p);
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}
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fn join(pair: (task::task, comm::port<bool>)) -> bool {
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let (_, port) = pair;
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comm::recv(port)
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}
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fn supervised() {
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// Yield to make sure the supervisor joins before we
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// fail. This is currently not needed because the supervisor
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// runs first, but I can imagine that changing.
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#error["supervised task=%d", task::get_task()];
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task::yield();
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fail;
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}
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fn supervisor() {
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// Unsupervise this task so the process doesn't return a failure status as
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// a result of the main task being killed.
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task::unsupervise();
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#error["supervisor task=%d", task::get_task()];
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let t = joinable(supervised);
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join(t);
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}
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fn main() {
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join(joinable(supervisor));
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}
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// Local Variables:
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// mode: rust;
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// fill-column: 78;
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// indent-tabs-mode: nil
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// c-basic-offset: 4
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// buffer-file-coding-system: utf-8-unix
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// End:
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