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Terminate timer scheduler thread during shutdown

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This commit is contained in:
Fernando Jiménez Moreno 2017-03-29 20:34:37 +02:00
parent 6a795f4795
commit fb878f33d1
8 changed files with 47 additions and 23 deletions
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17
components/constellation/timer_scheduler.rs
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@ -3,7 +3,7 @@
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use ipc_channel::ipc::{self, IpcSender};
use script_traits::{TimerEvent, TimerEventRequest};
use script_traits::{TimerEvent, TimerEventRequest, TimerSchedulerMsg};
use std::cmp::{self, Ord};
use std::collections::BinaryHeap;
use std::sync::mpsc;
@ -38,7 +38,7 @@ impl PartialEq for ScheduledEvent {
}
impl TimerScheduler {
pub fn start() -> IpcSender<TimerEventRequest> {
pub fn start() -> IpcSender<TimerSchedulerMsg> {
let (req_ipc_sender, req_ipc_receiver) = ipc::channel().expect("Channel creation failed.");
let (req_sender, req_receiver) = mpsc::sync_channel(1);
@ -72,7 +72,7 @@ impl TimerScheduler {
// Look to see if there are any incoming events
match req_receiver.try_recv() {
// If there is an event, add it to the priority queue
Ok(req) => {
Ok(TimerSchedulerMsg::Request(req)) => {
let TimerEventRequest(_, _, _, delay) = req;
let schedule = Instant::now() + Duration::from_millis(delay.get());
let event = ScheduledEvent { request: req, for_time: schedule };
@ -85,7 +85,8 @@ impl TimerScheduler {
None => thread::park(),
Some(event) => thread::park_timeout(event.for_time - now),
},
// If the channel is closed, we are done.
// If the channel is closed or we are shutting down, we are done.
Ok(TimerSchedulerMsg::Exit) |
Err(Disconnected) => break,
}
}
@ -105,8 +106,16 @@ impl TimerScheduler {
.name(String::from("TimerProxy"))
.spawn(move || {
while let Ok(req) = req_ipc_receiver.recv() {
let mut shutting_down = false;
match req {
TimerSchedulerMsg::Exit => shutting_down = true,
_ => {}
}
let _ = req_sender.send(req);
timeout_thread.unpark();
if shutting_down {
break;
}
}
// This thread can terminate if the req_ipc_sender is dropped.
warn!("TimerProxy thread terminated.");