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if ExtendedDOMSlots are used before slots, use FatSlots to have fewer allocations.

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Bug: 1419661
This commit is contained in:
Olli Pettay 2018-06-30 01:30:37 +03:00 • committed by Emilio Cobos Álvarez
parent 8488875a56
commit 6483a89848
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1 changed files with 4 additions and 1 deletions
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5
components/style/gecko/wrapper.rs
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@ -651,7 +651,10 @@ impl<'le> GeckoElement<'le> {
#[inline]
fn extended_slots(&self) -> Option<&structs::FragmentOrElement_nsExtendedDOMSlots> {
self.dom_slots().and_then(|s| unsafe {
(s._base.mExtendedSlots.mPtr as *const structs::FragmentOrElement_nsExtendedDOMSlots)
// For the bit usage, see nsContentSlots::GetExtendedSlots.
let e_slots = s._base.mExtendedSlots &
!structs::nsIContent_nsContentSlots_sNonOwningExtendedSlotsFlag;
(e_slots as *const structs::FragmentOrElement_nsExtendedDOMSlots)
.as_ref()
})
}