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introduce layout query timestamp

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This commit is contained in:
csmoe 2018-03-17 00:40:13 +08:00
parent df6b64181b
commit 98fe118be4
9 changed files with 50 additions and 8 deletions
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20
components/layout_thread/lib.rs
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@ -46,6 +46,7 @@ extern crate servo_geometry;
extern crate servo_url;
extern crate style;
extern crate style_traits;
extern crate time as std_time;
extern crate webrender_api;
mod dom_wrapper;
@ -260,6 +261,9 @@ pub struct LayoutThread {
/// Paint time metrics.
paint_time_metrics: PaintTimeMetrics,
/// The time a layout query has waited before serviced by layout thread.
layout_query_timestamp: u64,
}
impl LayoutThreadFactory for LayoutThread {
@ -332,6 +336,12 @@ impl Deref for ScriptReflowResult {
}
}
impl DerefMut for ScriptReflowResult {
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.script_reflow
}
}
impl ScriptReflowResult {
fn new(script_reflow: ScriptReflow) -> ScriptReflowResult {
ScriptReflowResult {
@ -541,6 +551,7 @@ impl LayoutThread {
},
layout_threads: layout_threads,
paint_time_metrics: paint_time_metrics,
layout_query_timestamp: 0u64,
}
}
@ -858,6 +869,9 @@ impl LayoutThread {
// Drop the root flow explicitly to avoid holding style data, such as
// rule nodes. The `Stylist` checks when it is dropped that all rule
// nodes have been GCed, so we want drop anyone who holds them first.
let now = std_time::precise_time_ns();
let waiting_time = now - self.layout_query_timestamp;
debug!("layout: query has been waited: {}", waiting_time);
self.root_flow.borrow_mut().take();
// Drop the rayon threadpool if present.
let _ = self.parallel_traversal.take();
@ -1066,6 +1080,9 @@ impl LayoutThread {
fn handle_reflow<'a, 'b>(&mut self,
data: &mut ScriptReflowResult,
possibly_locked_rw_data: &mut RwData<'a, 'b>) {
// Set layout query timestamp
data.reflow_goal.set_timestamp();
let document = unsafe { ServoLayoutNode::new(&data.document) };
let document = document.as_document().unwrap();
@ -1080,10 +1097,11 @@ impl LayoutThread {
let element = match document.root_element() {
None => {
self.layout_query_timestamp = data.reflow_goal.timestamp().expect("Not a QueryMsg");
// Since we cannot compute anything, give spec-required placeholders.
debug!("layout: No root node: bailing");
match data.reflow_goal {
ReflowGoal::LayoutQuery(ref quermsg, _) => match quermsg {
ReflowGoal::LayoutQuery(ref query_msg, _) => match query_msg {
&QueryMsg::ContentBoxQuery(_) => {
rw_data.content_box_response = None;
},