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 13 namespace ui { 14 namespace 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. 27 static 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
