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Avoid multiple hashtable lookups in DisplayItemData destructor

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UXP has:

MOZ_RELEASE_ASSERT(sAliveDisplayItemDatas && sAliveDisplayItemDatas >Contains(this));
  sAliveDisplayItemDatas->RemoveEntry(this);

and this gets hit during frame destruction.

Combine these checks.
This commit is contained in:
win7-7 2019-07-07 20:02:35 +03:00 • committed by Roy Tam
commit 22d77a3d80
1 changed files with 7 additions and 2 deletions
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9
layout/base/FrameLayerBuilder.cpp
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@ -272,8 +272,13 @@ FrameLayerBuilder::DisplayItemData::~DisplayItemData()
array->RemoveElement(this);
}
MOZ_RELEASE_ASSERT(sAliveDisplayItemDatas && sAliveDisplayItemDatas->Contains(this));
sAliveDisplayItemDatas->RemoveEntry(this);
MOZ_RELEASE_ASSERT(sAliveDisplayItemDatas);
nsPtrHashKey<mozilla::FrameLayerBuilder::DisplayItemData>* entry
= sAliveDisplayItemDatas->GetEntry(this);
MOZ_RELEASE_ASSERT(entry);
sAliveDisplayItemDatas->RemoveEntry(entry);
if (sAliveDisplayItemDatas->Count() == 0) {
delete sAliveDisplayItemDatas;
sAliveDisplayItemDatas = nullptr;