| // Copyright 2019 The Dawn Authors |
| // |
| // 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 DAWNNATIVE_CACHED_OBJECT_H_ |
| #define DAWNNATIVE_CACHED_OBJECT_H_ |
| |
| #include <cstddef> |
| |
| namespace dawn::native { |
| |
| // Some objects are cached so that instead of creating new duplicate objects, |
| // we increase the refcount of an existing object. |
| // When an object is successfully created, the device should call |
| // SetIsCachedReference() and insert the object into the cache. |
| class CachedObject { |
| public: |
| bool IsCachedReference() const; |
| |
| // Functor necessary for the unordered_set<CachedObject*>-based cache. |
| struct HashFunc { |
| size_t operator()(const CachedObject* obj) const; |
| }; |
| |
| size_t GetContentHash() const; |
| void SetContentHash(size_t contentHash); |
| |
| private: |
| friend class DeviceBase; |
| void SetIsCachedReference(); |
| |
| bool mIsCachedReference = false; |
| |
| // Called by ObjectContentHasher upon creation to record the object. |
| virtual size_t ComputeContentHash() = 0; |
| |
| size_t mContentHash = 0; |
| bool mIsContentHashInitialized = false; |
| }; |
| |
| } // namespace dawn::native |
| |
| #endif // DAWNNATIVE_CACHED_OBJECT_H_ |