Source/WebCore/platform/CommonAtomStrings.cpp

/*
 * Copyright (C) 2022 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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 */

#include "config.h"
#include "CommonAtomStrings.h"

namespace WebCore {

#define DEFINE_COMMON_ATOM(atomName, atomValue) \
    MainThreadLazyNeverDestroyed<const AtomString> atomName ## AtomData;
#define INITIALIZE_COMMON_ATOM(atomName, atomValue) \
    atomName ## AtomData.constructWithoutAccessCheck(atomValue ## _s);

WEBCORE_COMMON_ATOM_STRINGS_FOR_EACH_KEYWORD(DEFINE_COMMON_ATOM)

void initializeCommonAtomStrings()
{
    // Initialization is not thread safe, so this function must be called from the main thread first.
    ASSERT(isUIThread());

    static std::once_flag initializeKey;
    std::call_once(initializeKey, [] {
        WEBCORE_COMMON_ATOM_STRINGS_FOR_EACH_KEYWORD(INITIALIZE_COMMON_ATOM)
    });
}

#undef DEFINE_COMMON_ATOM
#undef INITIALIZE_COMMON_ATOM

} // namespace WebCore