| /* |
| * Copyright (C) 2021 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. |
| */ |
| |
| #ifndef ANDROID_HARDWARE_INTERFACES_NEURALNETWORKS_AIDL_UTILS_BURST_H |
| #define ANDROID_HARDWARE_INTERFACES_NEURALNETWORKS_AIDL_UTILS_BURST_H |
| |
| #include <aidl/android/hardware/neuralnetworks/IBurst.h> |
| #include <android-base/scopeguard.h> |
| #include <android-base/thread_annotations.h> |
| #include <nnapi/IBurst.h> |
| #include <nnapi/Result.h> |
| #include <nnapi/Types.h> |
| #include <nnapi/hal/CommonUtils.h> |
| |
| #include <atomic> |
| #include <memory> |
| #include <mutex> |
| #include <optional> |
| #include <unordered_map> |
| #include <utility> |
| |
| // See hardware/interfaces/neuralnetworks/utils/README.md for more information on AIDL interface |
| // lifetimes across processes and for protecting asynchronous calls across AIDL. |
| |
| namespace aidl::android::hardware::neuralnetworks::utils { |
| |
| // Class that adapts aidl_hal::IBurst to nn::IBurst. |
| class Burst final : public nn::IBurst, public std::enable_shared_from_this<Burst> { |
| struct PrivateConstructorTag {}; |
| |
| public: |
| /** |
| * Thread-safe, self-cleaning cache that relates an nn::Memory object to a unique int64_t |
| * identifier. |
| */ |
| class MemoryCache : public std::enable_shared_from_this<MemoryCache> { |
| public: |
| using Task = std::function<void()>; |
| using Cleanup = ::android::base::ScopeGuard<Task>; |
| using SharedCleanup = std::shared_ptr<const Cleanup>; |
| using WeakCleanup = std::weak_ptr<const Cleanup>; |
| |
| explicit MemoryCache(std::shared_ptr<aidl_hal::IBurst> burst); |
| |
| /** |
| * Get or cache a memory object in the MemoryCache object. |
| * |
| * @param memory Memory object to be cached while the returned `SharedCleanup` is alive. |
| * @return A pair of (1) a unique identifier for the cache entry and (2) a ref-counted |
| * "hold" object which preserves the cache as long as the hold object is alive. |
| */ |
| std::pair<int64_t, SharedCleanup> getOrCacheMemory(const nn::SharedMemory& memory); |
| |
| /** |
| * Get a cached memory object in the MemoryCache object if it exists, otherwise |
| * std::nullopt. |
| * |
| * @param memory Memory object to be cached while the returned `SharedCleanup` is alive. |
| * @return A pair of (1) a unique identifier for the cache entry and (2) a ref-counted |
| * "hold" object which preserves the cache as long as the hold object is alive. IF the |
| * cache entry is not present, std::nullopt is returned instead. |
| */ |
| std::optional<std::pair<int64_t, SharedCleanup>> getMemoryIfAvailable( |
| const nn::SharedMemory& memory); |
| |
| private: |
| void tryFreeMemory(const nn::SharedMemory& memory, int64_t identifier); |
| |
| const std::shared_ptr<aidl_hal::IBurst> kBurst; |
| std::mutex mMutex; |
| int64_t mUnusedIdentifier GUARDED_BY(mMutex) = 0; |
| std::unordered_map<nn::SharedMemory, std::pair<int64_t, WeakCleanup>> mCache |
| GUARDED_BY(mMutex); |
| }; |
| |
| static nn::GeneralResult<std::shared_ptr<const Burst>> create( |
| std::shared_ptr<aidl_hal::IBurst> burst); |
| |
| Burst(PrivateConstructorTag tag, std::shared_ptr<aidl_hal::IBurst> burst); |
| |
| // See IBurst::cacheMemory for information. |
| OptionalCacheHold cacheMemory(const nn::SharedMemory& memory) const override; |
| |
| // See IBurst::execute for information. |
| nn::ExecutionResult<std::pair<std::vector<nn::OutputShape>, nn::Timing>> execute( |
| const nn::Request& request, nn::MeasureTiming measure, |
| const nn::OptionalTimePoint& deadline, |
| const nn::OptionalDuration& loopTimeoutDuration) const override; |
| |
| // See IBurst::createReusableExecution for information. |
| nn::GeneralResult<nn::SharedExecution> createReusableExecution( |
| const nn::Request& request, nn::MeasureTiming measure, |
| const nn::OptionalDuration& loopTimeoutDuration) const override; |
| |
| nn::ExecutionResult<std::pair<std::vector<nn::OutputShape>, nn::Timing>> executeInternal( |
| const aidl_hal::Request& request, const std::vector<int64_t>& memoryIdentifierTokens, |
| bool measure, int64_t deadline, int64_t loopTimeoutDuration, |
| const hal::utils::RequestRelocation& relocation) const; |
| |
| private: |
| mutable std::atomic_flag mExecutionInFlight = ATOMIC_FLAG_INIT; |
| const std::shared_ptr<aidl_hal::IBurst> kBurst; |
| const std::shared_ptr<MemoryCache> kMemoryCache; |
| }; |
| |
| } // namespace aidl::android::hardware::neuralnetworks::utils |
| |
| #endif // ANDROID_HARDWARE_INTERFACES_NEURALNETWORKS_AIDL_UTILS_BURST_H |