1 /* 2 * Copyright 2019 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <android-base/thread_annotations.h> 20 #include <binder/IBinder.h> 21 #include <gui/LayerState.h> 22 #include <ui/GraphicBuffer.h> 23 #include <utils/RefBase.h> 24 #include <utils/Singleton.h> 25 26 #include <map> 27 #include <mutex> 28 #include <set> 29 #include <unordered_map> 30 31 #define BUFFER_CACHE_MAX_SIZE 64 32 33 namespace android { 34 35 class ClientCache : public Singleton<ClientCache> { 36 public: 37 ClientCache(); 38 39 void add(const client_cache_t& cacheId, const sp<GraphicBuffer>& buffer); 40 void erase(const client_cache_t& cacheId); 41 42 sp<GraphicBuffer> get(const client_cache_t& cacheId); 43 44 void removeProcess(const wp<IBinder>& processToken); 45 46 class ErasedRecipient : public virtual RefBase { 47 public: 48 virtual void bufferErased(const client_cache_t& clientCacheId) = 0; 49 }; 50 51 void registerErasedRecipient(const client_cache_t& cacheId, 52 const wp<ErasedRecipient>& recipient); 53 void unregisterErasedRecipient(const client_cache_t& cacheId, 54 const wp<ErasedRecipient>& recipient); 55 56 private: 57 std::mutex mMutex; 58 59 struct ClientCacheBuffer { 60 sp<GraphicBuffer> buffer; 61 std::set<wp<ErasedRecipient>> recipients; 62 }; 63 std::map<wp<IBinder> /*caching process*/, 64 std::unordered_map<uint64_t /*cache id*/, ClientCacheBuffer>> 65 mBuffers GUARDED_BY(mMutex); 66 67 class CacheDeathRecipient : public IBinder::DeathRecipient { 68 public: 69 void binderDied(const wp<IBinder>& who) override; 70 }; 71 72 sp<CacheDeathRecipient> mDeathRecipient; 73 74 bool getBuffer(const client_cache_t& cacheId, ClientCacheBuffer** outClientCacheBuffer) 75 REQUIRES(mMutex); 76 }; 77 78 }; // namespace android 79
