| /* |
| * Copyright (c) 2018, Intel Corporation |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included |
| * in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| |
| #ifndef _CM_EXTENSION_CREATOR_H_ |
| #define _CM_EXTENSION_CREATOR_H_ |
| |
| static const int priorityNum = 4; |
| |
| template <class T> |
| class CmExtensionCreator |
| { |
| typedef T* (*Creator)(); |
| |
| public: |
| template <class C> |
| static bool RegisterClass(int priority = 0) |
| { |
| if (priority >= priorityNum) |
| { |
| return false; |
| } |
| Creator *c = GetCreators(); |
| c[priority] = Create<C>; |
| return true; |
| } |
| |
| static T* CreateClass() |
| { |
| Creator *c = GetCreators(); |
| for (int i = priorityNum - 1; i >= 0; i--) |
| { |
| if (c[i] != nullptr) |
| { |
| return c[i](); |
| } |
| } |
| return nullptr; |
| } |
| |
| private: |
| static Creator* GetCreators() |
| { |
| static Creator m_creators[priorityNum]; |
| return m_creators; |
| } |
| |
| template <class C> |
| static T* Create() |
| { |
| return new C; |
| } |
| }; |
| #endif |