Source/JavaScriptCore/runtime/InitializeThreading.cpp

/*
 * Copyright (C) 2008, 2015 Apple Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
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 *     notice, this list of conditions and the following disclaimer. 
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 *     notice, this list of conditions and the following disclaimer in the
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 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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#include "config.h"
#include "InitializeThreading.h"

#include "ExecutableAllocator.h"
#include "Heap.h"
#include "HeapStatistics.h"
#include "Options.h"
#include "Identifier.h"
#include "JSDateMath.h"
#include "JSGlobalObject.h"
#include "JSLock.h"
#include "LLIntData.h"
#include "StructureIDTable.h"
#include "WriteBarrier.h"
#include <mutex>
#include <wtf/dtoa.h>
#include <wtf/Threading.h>
#include <wtf/dtoa/cached-powers.h>

using namespace WTF;

namespace JSC {

void initializeThreading()
{
    static std::once_flag initializeThreadingOnceFlag;

    std::call_once(initializeThreadingOnceFlag, []{
        WTF::double_conversion::initialize();
        WTF::initializeThreading();
        Options::initialize();
        if (Options::recordGCPauseTimes())
            HeapStatistics::initialize();
#if ENABLE(WRITE_BARRIER_PROFILING)
        WriteBarrierCounters::initialize();
#endif
#if ENABLE(ASSEMBLER)
        ExecutableAllocator::initializeAllocator();
#endif
        LLInt::initialize();
#ifndef NDEBUG
        DisallowGC::initialize();
#endif
        WTFThreadData& threadData = wtfThreadData();
        threadData.setSavedLastStackTop(threadData.stack().origin());
    });
}

} // namespace JSC