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65 lines
2.2 KiB
Rust
65 lines
2.2 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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// XXX The spec says that the performance timeline task source should be
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// a low priority task and it should be processed during idle periods.
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// We are currently treating this task queue as a normal priority queue.
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use dom::bindings::refcounted::Trusted;
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use dom::globalscope::GlobalScope;
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use msg::constellation_msg::PipelineId;
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use script_runtime::{CommonScriptMsg, ScriptChan, ScriptThreadEventCategory};
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use std::fmt;
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use std::result::Result;
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use task::{TaskCanceller, TaskOnce};
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use task_source::{TaskSource, TaskSourceName};
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#[derive(JSTraceable)]
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pub struct PerformanceTimelineTaskSource(pub Box<ScriptChan + Send + 'static>, pub PipelineId);
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impl Clone for PerformanceTimelineTaskSource {
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fn clone(&self) -> PerformanceTimelineTaskSource {
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PerformanceTimelineTaskSource(self.0.clone(), self.1.clone())
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}
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}
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impl fmt::Debug for PerformanceTimelineTaskSource {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "PerformanceTimelineTaskSource(...)")
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}
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}
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impl TaskSource for PerformanceTimelineTaskSource {
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const NAME: TaskSourceName = TaskSourceName::PerformanceTimeline;
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fn queue_with_canceller<T>(
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&self,
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task: T,
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canceller: &TaskCanceller,
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) -> Result<(), ()>
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where
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T: TaskOnce + 'static,
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{
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let msg = CommonScriptMsg::Task(
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ScriptThreadEventCategory::PerformanceTimelineTask,
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Box::new(canceller.wrap_task(task)),
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Some(self.1),
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PerformanceTimelineTaskSource::NAME,
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);
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self.0.send(msg).map_err(|_| ())
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}
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}
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impl PerformanceTimelineTaskSource {
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pub fn queue_notification(&self, global: &GlobalScope) {
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let owner = Trusted::new(&*global.performance());
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// FIXME(nox): Why are errors silenced here?
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let _ = self.queue(
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task!(notify_performance_observers: move || {
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owner.root().notify_observers();
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}),
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global,
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);
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}
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}
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