| // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef UI_BASE_WIN_ATL_MODULE_H_ |
| #define UI_BASE_WIN_ATL_MODULE_H_ |
| |
| #include "base/compiler_specific.h" |
| #include "base/macros.h" |
| #include "base/win/atl.h" |
| |
| namespace ui { |
| namespace win { |
| |
| // Ensure that we have exactly one ATL module registered. It's safe to |
| // call this more than once. ATL functions will crash if there's no |
| // ATL module registered, or if you try to register two of them, so |
| // dynamically registering one if needed makes it much easier for us |
| // to support different build configurations like multi-dll without |
| // worrying about which side of a module boundary each ATL module object |
| // belongs on. |
| // |
| // This function must be implemented in this header file rather than a |
| // source file so that it's inlined into the module where it's included, |
| // rather than in the "ui" module. |
| inline void CreateATLModuleIfNeeded() { |
| if (_pAtlModule == NULL) { |
| // This creates the module and automatically updates _pAtlModule. |
| new CComModule; |
| } |
| } |
| |
| } // namespace win |
| } // namespace ui |
| |
| #endif // UI_BASE_WIN_ATL_MODULE_H_ |