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Add assertions to LayoutDataRef accessors.

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This commit is contained in:
Ms2ger 2015-06-21 11:49:58 +02:00
parent ebd0a62eec
commit a217ffb00a
1 changed files with 8 additions and 3 deletions
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11
components/script/dom/node.rs
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@ -53,6 +53,7 @@ use script_traits::UntrustedNodeAddress;
use util::geometry::Au;
use util::namespace;
use util::str::DOMString;
use util::task_state;
use selectors::parser::{Selector, AttrSelector, NamespaceConstraint};
use selectors::parser::parse_author_origin_selector_list_from_str;
use selectors::matching::matches;
@ -222,7 +223,7 @@ pub struct LayoutData {
unsafe impl Send for LayoutData {}
pub struct LayoutDataRef {
pub data_cell: RefCell<Option<LayoutData>>,
data_cell: RefCell<Option<LayoutData>>,
}
no_jsmanaged_fields!(LayoutDataRef);
@ -236,7 +237,8 @@ impl LayoutDataRef {
/// Sends layout data, if any, back to the layout task to be destroyed.
pub fn dispose(&self) {
if let Some(mut layout_data) = mem::replace(&mut *self.borrow_mut(), None) {
debug_assert!(task_state::get().is_script());
if let Some(mut layout_data) = mem::replace(&mut *self.data_cell.borrow_mut(), None) {
let layout_chan = layout_data.chan.take();
match layout_chan {
None => {}
@ -248,18 +250,20 @@ impl LayoutDataRef {
}
}
/// Borrows the layout data immutably, *asserting that there are no mutators*. Bad things will
/// Borrows the layout data immutably, *assuming that there are no mutators*. Bad things will
/// happen if you try to mutate the layout data while this is held. This is the only thread-
/// safe layout data accessor.
#[inline]
#[allow(unsafe_code)]
pub unsafe fn borrow_unchecked(&self) -> *const Option<LayoutData> {
debug_assert!(task_state::get().is_layout());
self.data_cell.as_unsafe_cell().get() as *const _
}
/// Borrows the layout data immutably. This function is *not* thread-safe.
#[inline]
pub fn borrow<'a>(&'a self) -> Ref<'a,Option<LayoutData>> {
debug_assert!(task_state::get().is_layout());
self.data_cell.borrow()
}
@ -270,6 +274,7 @@ impl LayoutDataRef {
/// on it. This has already resulted in one bug!
#[inline]
pub fn borrow_mut<'a>(&'a self) -> RefMut<'a,Option<LayoutData>> {
debug_assert!(task_state::get().is_layout());
self.data_cell.borrow_mut()
}
}