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fix intermittent Option::unwrap in timers

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not allow to fire timers installed during another timer call
This commit is contained in:
Aleksandr Likhanov 2015-12-02 02:09:50 +05:00
parent a8cbc28643
commit d891e75d9d
4 changed files with 55 additions and 8 deletions
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22
components/script/timers.rs
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@ -23,7 +23,7 @@ use std::rc::Rc;
use util::mem::HeapSizeOf;
use util::str::DOMString;
#[derive(JSTraceable, PartialEq, Eq, Copy, Clone, HeapSizeOf, Hash, PartialOrd, Ord)]
#[derive(JSTraceable, PartialEq, Eq, Copy, Clone, HeapSizeOf, Hash, PartialOrd, Ord, Debug)]
pub struct TimerHandle(i32);
#[derive(JSTraceable, HeapSizeOf)]
@ -253,16 +253,22 @@ impl ActiveTimers {
// Since the event id was the expected one, at least one timer should be due.
assert!(base_time >= self.timers.borrow().last().unwrap().next_call);
// select timers to run to prevent firing timers
// that were installed during fire of another timer
let mut timers_to_run: Vec<Timer> = Vec::new();
loop {
let timer = {
let mut timers = self.timers.borrow_mut();
let mut timers = self.timers.borrow_mut();
if timers.is_empty() || timers.last().unwrap().next_call > base_time {
break;
}
if timers.is_empty() || timers.last().unwrap().next_call > base_time {
break;
}
timers_to_run.push(timers.pop().unwrap());
}
for timer in timers_to_run {
timers.pop().unwrap()
};
let callback = timer.callback.clone();
// prep for step 6 in nested set_timeout_or_interval calls