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#375: M1351303
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parent
aa6b13c599
commit
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@ -1197,10 +1197,10 @@ Element::SetAttribute(const nsAString& aName,
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if (IsHTMLElement() && IsInHTMLDocument()) {
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nsAutoString lower;
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nsContentUtils::ASCIIToLower(aName, lower);
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nameAtom = do_GetAtom(lower);
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nameAtom = NS_AtomizeMainThread(lower);
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}
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else {
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nameAtom = do_GetAtom(aName);
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nameAtom = NS_AtomizeMainThread(aName);
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}
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if (!nameAtom) {
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aError.Throw(NS_ERROR_OUT_OF_MEMORY);
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@ -1282,7 +1282,7 @@ Element::GetAttributeNS(const nsAString& aNamespaceURI,
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return;
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}
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nsCOMPtr<nsIAtom> name = do_GetAtom(aLocalName);
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nsCOMPtr<nsIAtom> name = NS_AtomizeMainThread(aLocalName);
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bool hasAttr = GetAttr(nsid, name, aReturn);
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if (!hasAttr) {
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SetDOMStringToNull(aReturn);
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@ -1314,7 +1314,7 @@ Element::RemoveAttributeNS(const nsAString& aNamespaceURI,
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const nsAString& aLocalName,
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ErrorResult& aError)
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{
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nsCOMPtr<nsIAtom> name = do_GetAtom(aLocalName);
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nsCOMPtr<nsIAtom> name = NS_AtomizeMainThread(aLocalName);
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int32_t nsid =
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nsContentUtils::NameSpaceManager()->GetNameSpaceID(aNamespaceURI);
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@ -1400,7 +1400,7 @@ Element::HasAttributeNS(const nsAString& aNamespaceURI,
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return false;
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}
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nsCOMPtr<nsIAtom> name = do_GetAtom(aLocalName);
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nsCOMPtr<nsIAtom> name = NS_AtomizeMainThread(aLocalName);
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return HasAttr(nsid, name);
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}
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@ -735,7 +735,7 @@ nsAttrValue::GetAsAtom() const
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{
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switch (Type()) {
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case eString:
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return do_GetAtom(GetStringValue());
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return NS_AtomizeMainThread(GetStringValue());
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case eAtom:
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{
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@ -747,7 +747,7 @@ nsAttrValue::GetAsAtom() const
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{
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nsAutoString val;
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ToString(val);
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return do_GetAtom(val);
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return NS_AtomizeMainThread(val);
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}
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}
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}
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@ -1260,7 +1260,7 @@ nsAttrValue::ParseAtomArray(const nsAString& aValue)
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++iter;
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} while (iter != end && !nsContentUtils::IsHTMLWhitespace(*iter));
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nsCOMPtr<nsIAtom> classAtom = do_GetAtom(Substring(start, iter));
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nsCOMPtr<nsIAtom> classAtom = NS_AtomizeMainThread(Substring(start, iter));
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if (!classAtom) {
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Reset();
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return;
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@ -1301,7 +1301,7 @@ nsAttrValue::ParseAtomArray(const nsAString& aValue)
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++iter;
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} while (iter != end && !nsContentUtils::IsHTMLWhitespace(*iter));
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classAtom = do_GetAtom(Substring(start, iter));
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classAtom = NS_AtomizeMainThread(Substring(start, iter));
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if (!array->AppendElement(classAtom)) {
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Reset();
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@ -1718,7 +1718,7 @@ nsAttrValue::SetMiscAtomOrString(const nsAString* aValue)
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"Empty string?");
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MiscContainer* cont = GetMiscContainer();
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if (len <= NS_ATTRVALUE_MAX_STRINGLENGTH_ATOM) {
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nsCOMPtr<nsIAtom> atom = NS_NewAtom(*aValue);
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nsCOMPtr<nsIAtom> atom = NS_AtomizeMainThread(*aValue);
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if (atom) {
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cont->mStringBits =
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reinterpret_cast<uintptr_t>(atom.forget().take()) | eAtomBase;
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@ -2850,11 +2850,11 @@ nsContentUtils::SplitQName(const nsIContent* aNamespaceResolver,
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if (*aNamespace == kNameSpaceID_Unknown)
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return NS_ERROR_FAILURE;
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*aLocalName = NS_NewAtom(Substring(colon + 1, end)).take();
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*aLocalName = NS_AtomizeMainThread(Substring(colon + 1, end)).take();
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}
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else {
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*aNamespace = kNameSpaceID_None;
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*aLocalName = NS_NewAtom(aQName).take();
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*aLocalName = NS_AtomizeMainThread(aQName).take();
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}
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NS_ENSURE_TRUE(aLocalName, NS_ERROR_OUT_OF_MEMORY);
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return NS_OK;
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@ -2879,7 +2879,7 @@ nsContentUtils::GetNodeInfoFromQName(const nsAString& aNamespaceURI,
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const char16_t* end;
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qName.EndReading(end);
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nsCOMPtr<nsIAtom> prefix = do_GetAtom(Substring(qName.get(), colon));
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nsCOMPtr<nsIAtom> prefix = NS_AtomizeMainThread(Substring(qName.get(), colon));
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rv = aNodeInfoManager->GetNodeInfo(Substring(colon + 1, end), prefix,
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nsID, aNodeType, aNodeInfo);
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@ -2939,7 +2939,7 @@ nsContentUtils::SplitExpatName(const char16_t *aExpatName, nsIAtom **aPrefix,
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nameStart = (uriEnd + 1);
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if (nameEnd) {
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const char16_t *prefixStart = nameEnd + 1;
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*aPrefix = NS_NewAtom(Substring(prefixStart, pos)).take();
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*aPrefix = NS_AtomizeMainThread(Substring(prefixStart, pos)).take();
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}
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else {
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nameEnd = pos;
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@ -2952,7 +2952,7 @@ nsContentUtils::SplitExpatName(const char16_t *aExpatName, nsIAtom **aPrefix,
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nameEnd = pos;
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*aPrefix = nullptr;
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}
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*aLocalName = NS_NewAtom(Substring(nameStart, nameEnd)).take();
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*aLocalName = NS_AtomizeMainThread(Substring(nameStart, nameEnd)).take();
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}
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// static
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@ -3708,7 +3708,7 @@ nsContentUtils::GetEventMessageAndAtom(const nsAString& aName,
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}
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*aEventMessage = eUnidentifiedEvent;
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nsCOMPtr<nsIAtom> atom = do_GetAtom(NS_LITERAL_STRING("on") + aName);
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nsCOMPtr<nsIAtom> atom = NS_AtomizeMainThread(NS_LITERAL_STRING("on") + aName);
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sUserDefinedEvents->AppendObject(atom);
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mapping.mAtom = atom;
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mapping.mMessage = eUnidentifiedEvent;
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@ -110,7 +110,7 @@ class nsHtml5TreeOperation {
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}
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nsAutoString str;
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aAtom->ToString(str);
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return do_GetAtom(str);
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return NS_AtomizeMainThread(str);
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}
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static nsresult AppendTextToTextNode(const char16_t* aBuffer,
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@ -298,6 +298,9 @@ static const PLDHashTableOps AtomTableOps = {
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AtomTableInitEntry
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};
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#define RECENTLY_USED_MAIN_THREAD_ATOM_CACHE_SIZE 31
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static nsIAtom*
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sRecentlyUsedMainThreadAtoms[RECENTLY_USED_MAIN_THREAD_ATOM_CACHE_SIZE] = {};
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static inline
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void
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@ -651,6 +654,8 @@ NS_NewAtom(const char16_t* aUTF16String)
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return NS_NewAtom(nsDependentString(aUTF16String));
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}
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// Equivalent to current NS_Atomize and called by NS_AtomizeMainThread.
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// Left as such for legacy callers in our older 45-era codebase.
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already_AddRefed<nsIAtom>
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NS_NewAtom(const nsAString& aUTF16String)
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{
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@ -671,6 +676,43 @@ NS_NewAtom(const nsAString& aUTF16String)
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return atom.forget();
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}
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// From bug 1351303, modified for Mozilla 45.
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already_AddRefed<nsIAtom>
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NS_AtomizeMainThread(const nsAString& aUTF16String)
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{
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MOZ_ASSERT(NS_IsMainThread());
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nsCOMPtr<nsIAtom> retVal;
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uint32_t hash;
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AtomTableKey key(aUTF16String.Data(), aUTF16String.Length(), &hash);
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uint32_t index = hash % RECENTLY_USED_MAIN_THREAD_ATOM_CACHE_SIZE;
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nsIAtom* atom = sRecentlyUsedMainThreadAtoms[index];
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if (atom) {
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// This isn't ideal, but covers for the collision case, I guess.
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// The atom names shouldn't be very long in any event.
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uint32_t length = atom->GetLength();
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if (length == key.mLength &&
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(memcmp(atom->GetUTF16String(),
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key.mUTF16String, length * sizeof(char16_t)) == 0)) {
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retVal = atom;
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return retVal.forget();
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}
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}
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// Inline relevant parts of GetAtomHashEntry.
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AtomTableEntry* he = static_cast<AtomTableEntry*>(gAtomTable->Add(&key));
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if (he->mAtom) {
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retVal = he->mAtom;
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} else {
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RefPtr<AtomImpl> atom = new AtomImpl(aUTF16String, hash);
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he->mAtom = atom;
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retVal = he->mAtom; // XXX?
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}
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sRecentlyUsedMainThreadAtoms[index] = retVal;
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return retVal.forget();
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}
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nsIAtom*
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NS_NewPermanentAtom(const nsAString& aUTF16String)
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{
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@ -127,6 +127,11 @@ extern nsIAtom* NS_NewPermanentAtom(const nsAString& aUTF16String);
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inline already_AddRefed<nsIAtom> do_GetAtom(const nsAString& aUTF16String)
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{ return NS_NewAtom(aUTF16String); }
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/**
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* An optimized version of the method above for the main thread (bug 1351303).
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*/
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extern already_AddRefed<nsIAtom> NS_AtomizeMainThread(const nsAString& aUTF16String);
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/**
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* Return a count of the total number of atoms currently
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* alive in the system.
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