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/*
* 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
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