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Use parking_lot::RwLock instead of DOMRefCell for PropertyDeclarationBlock

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This commit is contained in:
Simon Sapin 2016-09-27 16:02:36 +02:00
parent d986fd2d2f
commit 89a29a7f12
24 changed files with 121 additions and 106 deletions
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31
components/script/dom/element.rs
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@ -70,6 +70,7 @@ use html5ever::serialize::SerializeOpts;
use html5ever::serialize::TraversalScope;
use html5ever::serialize::TraversalScope::{ChildrenOnly, IncludeNode};
use html5ever::tree_builder::{LimitedQuirks, NoQuirks, Quirks};
use parking_lot::RwLock;
use selectors::matching::{ElementFlags, MatchingReason, matches};
use selectors::matching::{HAS_EDGE_CHILD_SELECTOR, HAS_SLOW_SELECTOR, HAS_SLOW_SELECTOR_LATER_SIBLINGS};
use selectors::parser::{AttrSelector, NamespaceConstraint, parse_author_origin_selector_list_from_str};
@ -110,7 +111,7 @@ pub struct Element {
attrs: DOMRefCell<Vec<JS<Attr>>>,
id_attribute: DOMRefCell<Option<Atom>>,
#[ignore_heap_size_of = "Arc"]
style_attribute: DOMRefCell<Option<Arc<DOMRefCell<PropertyDeclarationBlock>>>>,
style_attribute: DOMRefCell<Option<Arc<RwLock<PropertyDeclarationBlock>>>>,
attr_list: MutNullableHeap<JS<NamedNodeMap>>,
class_list: MutNullableHeap<JS<DOMTokenList>>,
state: Cell<ElementState>,
@ -298,7 +299,7 @@ pub trait LayoutElementHelpers {
#[allow(unsafe_code)]
unsafe fn html_element_in_html_document_for_layout(&self) -> bool;
fn id_attribute(&self) -> *const Option<Atom>;
fn style_attribute(&self) -> *const Option<Arc<DOMRefCell<PropertyDeclarationBlock>>>;
fn style_attribute(&self) -> *const Option<Arc<RwLock<PropertyDeclarationBlock>>>;
fn local_name(&self) -> &Atom;
fn namespace(&self) -> &Namespace;
fn get_checked_state_for_layout(&self) -> bool;
@ -330,7 +331,7 @@ impl LayoutElementHelpers for LayoutJS<Element> {
#[inline]
fn from_declaration(rule: PropertyDeclaration) -> ApplicableDeclarationBlock {
ApplicableDeclarationBlock::from_declarations(
Arc::new(DOMRefCell::new(PropertyDeclarationBlock {
Arc::new(RwLock::new(PropertyDeclarationBlock {
declarations: vec![(rule, Importance::Normal)],
important_count: 0,
})),
@ -619,7 +620,7 @@ impl LayoutElementHelpers for LayoutJS<Element> {
}
#[allow(unsafe_code)]
fn style_attribute(&self) -> *const Option<Arc<DOMRefCell<PropertyDeclarationBlock>>> {
fn style_attribute(&self) -> *const Option<Arc<RwLock<PropertyDeclarationBlock>>> {
unsafe {
(*self.unsafe_get()).style_attribute.borrow_for_layout()
}
@ -708,7 +709,7 @@ impl Element {
self.attrs.borrow()
}
pub fn style_attribute(&self) -> &DOMRefCell<Option<Arc<DOMRefCell<PropertyDeclarationBlock>>>> {
pub fn style_attribute(&self) -> &DOMRefCell<Option<Arc<RwLock<PropertyDeclarationBlock>>>> {
&self.style_attribute
}
@ -738,7 +739,7 @@ impl Element {
// therefore, it should not trigger subsequent mutation events
pub fn sync_property_with_attrs_style(&self) {
let style_str = if let &Some(ref declarations) = &*self.style_attribute().borrow() {
declarations.borrow().to_css_string()
declarations.read().to_css_string()
} else {
String::new()
};
@ -770,7 +771,7 @@ impl Element {
let mut inline_declarations = element.style_attribute.borrow_mut();
if let &mut Some(ref mut declarations) = &mut *inline_declarations {
let mut importance = None;
let index = declarations.borrow().declarations.iter().position(|&(ref decl, i)| {
let index = declarations.read().declarations.iter().position(|&(ref decl, i)| {
let matching = decl.matches(property);
if matching {
importance = Some(i)
@ -778,7 +779,7 @@ impl Element {
matching
});
if let Some(index) = index {
let mut declarations = Arc::make_mut(declarations).borrow_mut();
let mut declarations = declarations.write();
declarations.declarations.remove(index);
if importance.unwrap().important() {
declarations.important_count -= 1;
@ -799,9 +800,7 @@ impl Element {
let mut inline_declarations = element.style_attribute().borrow_mut();
if let &mut Some(ref mut declaration_block) = &mut *inline_declarations {
{
// Usually, the reference count will be 1 here. But transitions could make it greater
// than that.
let mut declaration_block = Arc::make_mut(declaration_block).borrow_mut();
let mut declaration_block = declaration_block.write();
let declaration_block = &mut *declaration_block;
let existing_declarations = &mut declaration_block.declarations;
@ -836,7 +835,7 @@ impl Element {
0
};
*inline_declarations = Some(Arc::new(DOMRefCell::new(PropertyDeclarationBlock {
*inline_declarations = Some(Arc::new(RwLock::new(PropertyDeclarationBlock {
declarations: declarations.into_iter().map(|d| (d, importance)).collect(),
important_count: important_count,
})));
@ -852,9 +851,7 @@ impl Element {
{
let mut inline_declarations = self.style_attribute().borrow_mut();
if let &mut Some(ref mut block) = &mut *inline_declarations {
// Usually, the reference counts of `from` and `to` will be 1 here. But transitions
// could make them greater than that.
let mut block = Arc::make_mut(block).borrow_mut();
let mut block = block.write();
let block = &mut *block;
let declarations = &mut block.declarations;
for &mut (ref declaration, ref mut importance) in declarations {
@ -881,7 +878,7 @@ impl Element {
where F: FnOnce(Option<&(PropertyDeclaration, Importance)>) -> R {
let style_attr = self.style_attribute.borrow();
if let Some(ref block) = *style_attr {
let block = block.borrow();
let block = block.read();
f(block.get(property))
} else {
f(None)
@ -2131,7 +2128,7 @@ impl VirtualMethods for Element {
*self.style_attribute.borrow_mut() =
mutation.new_value(attr).map(|value| {
let win = window_from_node(self);
Arc::new(DOMRefCell::new(parse_style_attribute(
Arc::new(RwLock::new(parse_style_attribute(
&value,
&doc.base_url(),
win.css_error_reporter(),