Howard Chen | 4904f96 | 2017-12-08 18:11:05 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 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 | #ifndef ANDROID_HARDWARD_HIDLMEMORY_CACHE_H |
| 17 | #define ANDROID_HARDWARD_HIDLMEMORY_CACHE_H |
| 18 | |
| 19 | #include <android/hidl/memory/block/1.0/types.h> |
| 20 | #include <android/hidl/memory/token/1.0/IMemoryToken.h> |
| 21 | #include <hidl/HidlBinderSupport.h> |
| 22 | #include <hwbinder/IBinder.h> |
| 23 | #include <utils/RefBase.h> |
| 24 | #include "HidlCache.h" |
| 25 | |
| 26 | namespace android { |
| 27 | namespace hardware { |
| 28 | |
| 29 | struct IMemoryTokenCompare { |
| 30 | using IMemoryToken = ::android::hidl::memory::token::V1_0::IMemoryToken; |
| 31 | bool operator()(const sp<IMemoryToken>& lhs, const sp<IMemoryToken>& rhs) const { |
| 32 | sp<IBinder> lb = toBinder<IMemoryToken>(lhs); |
| 33 | sp<IBinder> rb = toBinder<IMemoryToken>(rhs); |
| 34 | return lb < rb; |
| 35 | } |
| 36 | }; |
| 37 | |
| 38 | // The HidlMemoryCache is a singleton class to provides cache for |
| 39 | // IMemoryToken => ::android::hidl::memory::V1_0::IMemory |
| 40 | // It's an abstraction layer on top of the IMapper and supports, but is |
| 41 | // not limited to, the Ashmem type HidlMemory. |
| 42 | class HidlMemoryCache |
| 43 | : public virtual HidlCache<sp<::android::hidl::memory::token::V1_0::IMemoryToken>, |
| 44 | ::android::hidl::memory::V1_0::IMemory, IMemoryTokenCompare> { |
| 45 | using IMemoryToken = ::android::hidl::memory::token::V1_0::IMemoryToken; |
| 46 | using IMemory = ::android::hidl::memory::V1_0::IMemory; |
| 47 | using MemoryBlock = ::android::hidl::memory::block::V1_0::MemoryBlock; |
| 48 | |
| 49 | public: |
| 50 | virtual sp<IMemory> map(const MemoryBlock& block); |
| 51 | // get the singleton |
| 52 | static sp<HidlMemoryCache> getInstance(); |
| 53 | |
| 54 | protected: |
| 55 | HidlMemoryCache() {} |
| 56 | virtual sp<IMemory> fillLocked(const sp<IMemoryToken>& key) override; |
| 57 | }; |
| 58 | |
| 59 | } // namespace hardware |
| 60 | } // namespace android |
| 61 | |
| 62 | #endif |