runtime/InitializeThreading.cpp

   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