forked from mirrors/gecko-dev
8ad99dd7fa
It's a sub-class of nsAtom, useful for cases where you know you are dealing exclusively with static atoms. The nice thing about it is that you can use raw nsStaticAtom pointers instead of RefPtr<>. (In fact, the AddRef/Release implementations ensure that we'll crash if we use RefPtr<nsStaticAtom>.) MozReview-Commit-ID: 4Q6QHX5h44V --HG-- extra : rebase_source : e4237f85b4821b684db0ef84d1f9c5e17cdee428
65 lines
1.5 KiB
C++
65 lines
1.5 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsHtml5AtomTable.h"
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#include "nsThreadUtils.h"
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nsHtml5AtomEntry::nsHtml5AtomEntry(KeyTypePointer aStr)
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: nsStringHashKey(aStr)
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, mAtom(new nsAtom(nsAtom::AtomKind::HTML5Atom, *aStr, 0))
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{
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}
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nsHtml5AtomEntry::nsHtml5AtomEntry(const nsHtml5AtomEntry& aOther)
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: nsStringHashKey(aOther)
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, mAtom(nullptr)
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{
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NS_NOTREACHED("nsHtml5AtomTable is broken and tried to copy an entry");
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}
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nsHtml5AtomEntry::~nsHtml5AtomEntry()
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{
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delete mAtom;
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}
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nsHtml5AtomTable::nsHtml5AtomTable()
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: mRecentlyUsedParserAtoms{}
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{
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#ifdef DEBUG
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mPermittedLookupEventTarget = mozilla::GetCurrentThreadSerialEventTarget();
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#endif
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}
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nsHtml5AtomTable::~nsHtml5AtomTable()
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{
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}
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nsAtom*
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nsHtml5AtomTable::GetAtom(const nsAString& aKey)
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{
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#ifdef DEBUG
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{
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MOZ_ASSERT(mPermittedLookupEventTarget->IsOnCurrentThread());
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}
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#endif
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uint32_t index = mozilla::HashString(aKey) % RECENTLY_USED_PARSER_ATOMS_SIZE;
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nsAtom* cachedAtom = mRecentlyUsedParserAtoms[index];
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if (cachedAtom && cachedAtom->Equals(aKey)) {
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return cachedAtom;
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}
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nsStaticAtom* atom = NS_GetStaticAtom(aKey);
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if (atom) {
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mRecentlyUsedParserAtoms[index] = atom;
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return atom;
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}
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nsHtml5AtomEntry* entry = mTable.PutEntry(aKey);
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if (!entry) {
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return nullptr;
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}
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mRecentlyUsedParserAtoms[index] = entry->GetAtom();
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return entry->GetAtom();
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}
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