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      1 /*
      2  * Copyright (C) 2008 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *
      8  * 1.  Redistributions of source code must retain the above copyright
      9  *     notice, this list of conditions and the following disclaimer.
     10  * 2.  Redistributions in binary form must reproduce the above copyright
     11  *     notice, this list of conditions and the following disclaimer in the
     12  *     documentation and/or other materials provided with the distribution.
     13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     14  *     its contributors may be used to endorse or promote products derived
     15  *     from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include "config.h"
     30 #include "InitializeThreading.h"
     31 
     32 #include "Heap.h"
     33 #include "dtoa.h"
     34 #include "Identifier.h"
     35 #include "JSGlobalObject.h"
     36 #include "UString.h"
     37 #include <wtf/DateMath.h>
     38 #include <wtf/Threading.h>
     39 #include <wtf/WTFThreadData.h>
     40 
     41 using namespace WTF;
     42 
     43 namespace JSC {
     44 
     45 #if OS(DARWIN) && ENABLE(JSC_MULTIPLE_THREADS)
     46 static pthread_once_t initializeThreadingKeyOnce = PTHREAD_ONCE_INIT;
     47 #endif
     48 
     49 static void initializeThreadingOnce()
     50 {
     51     // StringImpl::empty() does not construct its static string in a threadsafe fashion,
     52     // so ensure it has been initialized from here.
     53     StringImpl::empty();
     54 
     55     WTF::initializeThreading();
     56     wtfThreadData();
     57     JSGlobalData::storeVPtrs();
     58 #if ENABLE(JSC_MULTIPLE_THREADS)
     59     s_dtoaP5Mutex = new Mutex;
     60     initializeDates();
     61     RegisterFile::initializeThreading();
     62 #endif
     63 }
     64 
     65 void initializeThreading()
     66 {
     67 #if OS(DARWIN) && ENABLE(JSC_MULTIPLE_THREADS)
     68     pthread_once(&initializeThreadingKeyOnce, initializeThreadingOnce);
     69 #else
     70     static bool initializedThreading = false;
     71     if (!initializedThreading) {
     72         initializeThreadingOnce();
     73         initializedThreading = true;
     74     }
     75 #endif
     76 }
     77 
     78 } // namespace JSC
     79