Source/JavaScriptCore/heap/ThreadLocalCacheLayout.cpp

/*
 * Copyright (C) 2018 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. ``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
 * 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 CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */

#include "config.h"
#include "ThreadLocalCacheLayout.h"

#include "BlockDirectory.h"

namespace JSC {

ThreadLocalCacheLayout::ThreadLocalCacheLayout()
{
}

ThreadLocalCacheLayout::~ThreadLocalCacheLayout()
{
}

void ThreadLocalCacheLayout::allocateOffset(BlockDirectory* directory)
{
    auto locker = holdLock(m_lock);
    directory->m_tlcOffset = m_size;
    m_size += sizeof(LocalAllocator);
    m_directories.append(directory);
}

ThreadLocalCacheLayout::Snapshot ThreadLocalCacheLayout::snapshot()
{
    auto locker = holdLock(m_lock);
    Snapshot result;
    result.size = m_size;
    result.directories = m_directories;
    return result;
}

BlockDirectory* ThreadLocalCacheLayout::directory(unsigned offset)
{
    auto locker = holdLock(m_lock);
    return m_directories[offset / sizeof(LocalAllocator)];
}

} // namespace JSC