/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_HARDWARD_HIDLMEMORY_CACHE_H
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#define ANDROID_HARDWARD_HIDLMEMORY_CACHE_H
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#include <android/hidl/memory/block/1.0/types.h>
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#include <android/hidl/memory/token/1.0/IMemoryToken.h>
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#include <hidl/HidlBinderSupport.h>
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#include <hwbinder/IBinder.h>
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#include <utils/RefBase.h>
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#include "HidlCache.h"
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namespace android {
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namespace hardware {
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struct IMemoryTokenCompare {
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using IMemoryToken = ::android::hidl::memory::token::V1_0::IMemoryToken;
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bool operator()(const sp<IMemoryToken>& lhs, const sp<IMemoryToken>& rhs) const {
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sp<IBinder> lb = toBinder<IMemoryToken>(lhs);
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sp<IBinder> rb = toBinder<IMemoryToken>(rhs);
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return lb < rb;
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}
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};
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// The HidlMemoryCache is a singleton class to provides cache for
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// IMemoryToken => ::android::hidl::memory::V1_0::IMemory
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// It's an abstraction layer on top of the IMapper and supports, but is
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// not limited to, the Ashmem type HidlMemory.
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class HidlMemoryCache
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: public virtual HidlCache<sp<::android::hidl::memory::token::V1_0::IMemoryToken>,
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::android::hidl::memory::V1_0::IMemory, IMemoryTokenCompare> {
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using IMemoryToken = ::android::hidl::memory::token::V1_0::IMemoryToken;
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using IMemory = ::android::hidl::memory::V1_0::IMemory;
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using MemoryBlock = ::android::hidl::memory::block::V1_0::MemoryBlock;
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public:
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virtual sp<IMemory> map(const MemoryBlock& block);
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// get the singleton
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static sp<HidlMemoryCache> getInstance();
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protected:
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HidlMemoryCache() {}
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virtual sp<IMemory> fillLocked(const sp<IMemoryToken>& key) override;
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};
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} // namespace hardware
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} // namespace android
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#endif
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