chromuim thread1

chromiumthread1.cpp

DWORD __stdcall ThreadFunc(void* params) {
  ThreadParams* thread_params = static_cast<ThreadParams*>(params);
  PlatformThread::Delegate* delegate = thread_params->delegate;
  if (!thread_params->joinable)
    base::ThreadRestrictions::SetSingletonAllowed(false);
  delete thread_params;
  delegate->ThreadMain();
  return NULL;
}

// CreateThreadInternal() matches PlatformThread::Create(), except that
// |out_thread_handle| may be NULL, in which case a non-joinable thread is
// created.
bool CreateThreadInternal(size_t stack_size,
                          PlatformThread::Delegate* delegate,
                          PlatformThreadHandle* out_thread_handle) {
  PlatformThreadHandle thread_handle;
  unsigned int flags = 0;
  if (stack_size > 0 && base::win::GetVersion() >= base::win::VERSION_XP) {
    flags = STACK_SIZE_PARAM_IS_A_RESERVATION;
  } else {
    stack_size = 0;
  }

  ThreadParams* params = new ThreadParams;
  params->delegate = delegate;
  params->joinable = out_thread_handle != NULL;

  // Using CreateThread here vs _beginthreadex makes thread creation a bit
  // faster and doesn't require the loader lock to be available.  Our code will
  // have to work running on CreateThread() threads anyway, since we run code
  // on the Windows thread pool, etc.  For some background on the difference:
  //   http://www.microsoft.com/msj/1099/win32/win321099.aspx
  thread_handle = CreateThread(
      NULL, stack_size, ThreadFunc, params, flags, NULL);
  if (!thread_handle) {
    delete params;
    return false;
  }

  if (out_thread_handle)
    *out_thread_handle = thread_handle;
  else
    CloseHandle(thread_handle);
  return true;
}