/* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* * nsHtml5AtomTable provides an atom cache for nsHtml5Parser and * nsHtml5StreamParser. * * An instance of nsHtml5AtomTable that belongs to an nsHtml5Parser is only * accessed from the main thread. An instance of nsHtml5AtomTable that belongs * to an nsHtml5StreamParser is accessed both from the main thread and from the * thread that executes the runnables of the nsHtml5StreamParser instance. * However, the threads never access the nsHtml5AtomTable instance concurrently * in the nsHtml5StreamParser case. * * Methods on the atoms obtained from nsHtml5AtomTable may be called on any * thread, although they only need to be called on the main thread or on the * thread working for the nsHtml5StreamParser when nsHtml5AtomTable belongs to * an nsHtml5StreamParser. * * Atoms cached by nsHtml5AtomTable are released when Clear() is called or when * the nsHtml5AtomTable itself is destructed, which happens when the owner * nsHtml5Parser or nsHtml5StreamParser is destructed.
*/ class nsHtml5AtomTable { public:
nsHtml5AtomTable();
~nsHtml5AtomTable();
// NOTE: We rely on mRecentlyUsedParserAtoms keeping alive the returned atom, // but the caller is responsible to take a reference before calling GetAtom // again.
nsAtom* GetAtom(const nsAString& aKey);
/** * Empties the table.
*/ void Clear() { for (uint32_t i = 0; i < RECENTLY_USED_PARSER_ATOMS_SIZE; ++i) {
mRecentlyUsedParserAtoms[i] = nullptr;
}
}
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