465f16fc67
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
66 lines
1.5 KiB
C++
66 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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