xref: /external/chromium_org/third_party/WebKit/Source/wtf/WTF.cpp

/*
 * Copyright (C) 2013 Google 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:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * 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.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
 * OWNER 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 "WTF.h"

#include "wtf/DefaultAllocator.h"
#include "wtf/FastMalloc.h"

namespace WTF {

extern void initializeThreading();

bool s_initialized;
bool s_shutdown;
bool Partitions::s_initialized;
PartitionAllocatorGeneric Partitions::m_bufferAllocator;

void initialize(TimeFunction currentTimeFunction, TimeFunction monotonicallyIncreasingTimeFunction)
{
    // WTF, and Blink in general, cannot handle being re-initialized, even if shutdown first.
    // Make that explicit here.
    ASSERT(!s_initialized);
    ASSERT(!s_shutdown);
    s_initialized = true;
    Partitions::initialize();
    setCurrentTimeFunction(currentTimeFunction);
    setMonotonicallyIncreasingTimeFunction(monotonicallyIncreasingTimeFunction);
    initializeThreading();
}

void shutdown()
{
    ASSERT(s_initialized);
    ASSERT(!s_shutdown);
    s_shutdown = true;
    Partitions::shutdown();
}

bool isShutdown()
{
    return s_shutdown;
}

void Partitions::initialize()
{
    static int lock = 0;
    // Guard against two threads hitting here in parallel.
    spinLockLock(&lock);
    if (!s_initialized) {
        m_bufferAllocator.init();
        s_initialized = true;
    }
    spinLockUnlock(&lock);
}

void Partitions::shutdown()
{
    fastMallocShutdown();
    m_bufferAllocator.shutdown();
}

} // namespace WTF