1// Copyright (c) 2011 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#ifndef UI_BASE_WIN_ATL_MODULE_H_ 6#define UI_BASE_WIN_ATL_MODULE_H_ 7 8#include <atlbase.h> 9#include <atlcom.h> 10 11#include "base/basictypes.h" 12 13namespace ui { 14namespace win { 15 16// Ensure that we have exactly one ATL module registered. It's safe to 17// call this more than once. ATL functions will crash if there's no 18// ATL module registered, or if you try to register two of them, so 19// dynamically registering one if needed makes it much easier for us 20// to support different build configurations like multi-dll without 21// worrying about which side of a module boundary each ATL module object 22// belongs on. 23// 24// This function must be implemented in this header file rather than a 25// source file so that it's inlined into the module where it's included, 26// rather than in the "ui" module. 27static void CreateATLModuleIfNeeded() { 28 if (_pAtlModule == NULL) { 29 // This creates the module and automatically updates _pAtlModule. 30 CR_DEFINE_STATIC_LOCAL(CComModule, module, ()); 31 } 32} 33 34} // namespace win 35} // namespace ui 36 37#endif // UI_BASE_WIN_ATL_MODULE_H_ 38