Use TLS storage for thread ids in wtf/ThreadingPThreads

third_party/WebKit/Source/wtf/ThreadingWin.cpp

 /*
  * Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile, 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
@@ skipping 109 matching lines @@
 typedef struct tagTHREADNAME_INFO {
   DWORD dwType;      // must be 0x1000
   LPCSTR szName;     // pointer to name (in user addr space)
   DWORD dwThreadID;  // thread ID (-1=caller thread)
   DWORD dwFlags;     // reserved for future use, must be zero
 } THREADNAME_INFO;
 #pragma pack(pop)
 
 static Mutex* atomicallyInitializedStaticMutex;
 
+namespace internal {
+
+ThreadIdentifier currentThreadSyscall() {
+  return static_cast<ThreadIdentifier>(GetCurrentThreadId());
+}
+
+}  // namespace internal
+
 void lockAtomicallyInitializedStaticMutex() {
   DCHECK(atomicallyInitializedStaticMutex);
   atomicallyInitializedStaticMutex->lock();
 }
 
 void unlockAtomicallyInitializedStaticMutex() {
   atomicallyInitializedStaticMutex->unlock();
 }
 
 void initializeThreading() {
   // This should only be called once.
   DCHECK(!atomicallyInitializedStaticMutex);
 
   // StringImpl::empty() does not construct its static string in a threadsafe
   // fashion, so ensure it has been initialized from here.
   StringImpl::empty();
   StringImpl::empty16Bit();
   atomicallyInitializedStaticMutex = new Mutex;
   wtfThreadData();
   initializeDates();
   // Force initialization of static DoubleToStringConverter converter variable
   // inside EcmaScriptConverter function while we are in single thread mode.
   double_conversion::DoubleToStringConverter::EcmaScriptConverter();
 }
 
 ThreadIdentifier currentThread() {
-  return static_cast<ThreadIdentifier>(GetCurrentThreadId());
+  return internal::currentThreadSyscall();
 }
 
 MutexBase::MutexBase(bool recursive) {
   m_mutex.m_recursionCount = 0;
   InitializeCriticalSection(&m_mutex.m_internalMutex);
 }
 
 MutexBase::~MutexBase() {
   DeleteCriticalSection(&m_mutex.m_internalMutex);
 }
@@ skipping 235 matching lines @@
 }
 
 void willCreateThread() {
   s_threadCreated = true;
 }
 #endif
 
 }  // namespace WTF
 
 #endif  // OS(WIN)