| /* |
| * Copyright 2019 The Android Open Source Project |
| * |
| * 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. |
| */ |
| |
| #pragma once |
| |
| #include <android-base/thread_annotations.h> |
| #include <binder/IBinder.h> |
| #include <gui/LayerState.h> |
| #include <ui/GraphicBuffer.h> |
| #include <utils/RefBase.h> |
| #include <utils/Singleton.h> |
| |
| #include <map> |
| #include <mutex> |
| #include <set> |
| #include <unordered_map> |
| |
| #define BUFFER_CACHE_MAX_SIZE 64 |
| |
| namespace android { |
| |
| class ClientCache : public Singleton<ClientCache> { |
| public: |
| ClientCache(); |
| |
| bool add(const client_cache_t& cacheId, const sp<GraphicBuffer>& buffer); |
| void erase(const client_cache_t& cacheId); |
| |
| sp<GraphicBuffer> get(const client_cache_t& cacheId); |
| |
| void removeProcess(const wp<IBinder>& processToken); |
| |
| class ErasedRecipient : public virtual RefBase { |
| public: |
| virtual void bufferErased(const client_cache_t& clientCacheId) = 0; |
| }; |
| |
| bool registerErasedRecipient(const client_cache_t& cacheId, |
| const wp<ErasedRecipient>& recipient); |
| void unregisterErasedRecipient(const client_cache_t& cacheId, |
| const wp<ErasedRecipient>& recipient); |
| |
| private: |
| std::mutex mMutex; |
| |
| struct ClientCacheBuffer { |
| sp<GraphicBuffer> buffer; |
| std::set<wp<ErasedRecipient>> recipients; |
| }; |
| std::map<wp<IBinder> /*caching process*/, |
| std::pair<sp<IBinder> /*strong ref to caching process*/, |
| std::unordered_map<uint64_t /*cache id*/, ClientCacheBuffer>>> |
| mBuffers GUARDED_BY(mMutex); |
| |
| class CacheDeathRecipient : public IBinder::DeathRecipient { |
| public: |
| void binderDied(const wp<IBinder>& who) override; |
| }; |
| |
| sp<CacheDeathRecipient> mDeathRecipient; |
| |
| bool getBuffer(const client_cache_t& cacheId, ClientCacheBuffer** outClientCacheBuffer) |
| REQUIRES(mMutex); |
| }; |
| |
| }; // namespace android |