| // Copyright 2019 The SwiftShader Authors. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef VK_DEBUG_ID_HPP_ |
| #define VK_DEBUG_ID_HPP_ |
| |
| #include <functional> // std::hash |
| |
| namespace vk { |
| namespace dbg { |
| |
| // ID is a strongly-typed identifier backed by a int. |
| // The template parameter T is not actually used by the implementation of |
| // ID; instead it is used to prevent implicit casts between identifiers of |
| // different T types. |
| // IDs are typically used as a map key to value of type T. |
| template <typename T> |
| class ID |
| { |
| public: |
| inline ID() : |
| id(0) {} |
| inline ID(int id) : |
| id(id) {} |
| inline bool operator==(const ID<T>& rhs) const { return id == rhs.id; } |
| inline bool operator!=(const ID<T>& rhs) const { return id != rhs.id; } |
| inline bool operator<(const ID<T>& rhs) const { return id < rhs.id; } |
| inline ID operator++() { return ID(++id); } |
| inline ID operator++(int) { return ID(id++); } |
| |
| // value returns the numerical value of the identifier. |
| inline int value() const { return id; } |
| |
| private: |
| int id; |
| }; |
| |
| } // namespace dbg |
| } // namespace vk |
| |
| namespace std { |
| |
| // std::hash implementation for vk::dbg::ID<T> |
| template <typename T> |
| struct hash<vk::dbg::ID<T> > |
| { |
| std::size_t operator()(const vk::dbg::ID<T>& id) const noexcept |
| { |
| return std::hash<int>()(id.value()); |
| } |
| }; |
| |
| } // namespace std |
| |
| #endif // VK_DEBUG_ID_HPP_ |