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96 lines
3.5 KiB
96 lines
3.5 KiB
4 months ago
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/**
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*
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* Copyright 2020, 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_MEDIA_RESOURCE_OBSERVER_SERVICE_H
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#define ANDROID_MEDIA_RESOURCE_OBSERVER_SERVICE_H
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#include <map>
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#include <aidl/android/media/BnResourceObserverService.h>
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#include "ResourceManagerService.h"
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namespace android {
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using Status = ::ndk::ScopedAStatus;
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using ::aidl::android::media::BnResourceObserverService;
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using ::aidl::android::media::IResourceObserver;
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using ::aidl::android::media::MediaObservableFilter;
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using ::aidl::android::media::MediaObservableParcel;
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using ::aidl::android::media::MediaObservableType;
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using ::aidl::android::media::MediaObservableEvent;
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class ResourceObserverService : public BnResourceObserverService {
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public:
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static char const *getServiceName() { return "media.resource_observer"; }
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static std::shared_ptr<ResourceObserverService> instantiate();
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virtual inline binder_status_t dump(
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int /*fd*/, const char** /*args*/, uint32_t /*numArgs*/);
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ResourceObserverService();
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virtual ~ResourceObserverService() {}
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// IResourceObserverService interface
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Status registerObserver(const std::shared_ptr<IResourceObserver>& in_observer,
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const std::vector<MediaObservableFilter>& in_filters) override;
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Status unregisterObserver(const std::shared_ptr<IResourceObserver>& in_observer) override;
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// ~IResourceObserverService interface
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// Called by ResourceManagerService when resources are added.
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void onResourceAdded(int uid, int pid, const ResourceList &resources);
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// Called by ResourceManagerService when resources are removed.
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void onResourceRemoved(int uid, int pid, const ResourceList &resources);
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private:
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struct ObserverInfo {
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::ndk::SpAIBinder binder;
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std::shared_ptr<IResourceObserver> observer;
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std::vector<MediaObservableFilter> filters;
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};
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struct DeathRecipient;
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// Below maps are all keyed on the observer's binder ptr value.
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using ObserverInfoMap = std::map<uintptr_t, ObserverInfo>;
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using SubscriberMap = std::map<uintptr_t, std::shared_ptr<IResourceObserver>>;
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std::mutex mObserverLock;
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// Binder->ObserverInfo
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ObserverInfoMap mObserverInfoMap GUARDED_BY(mObserverLock);
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// Observable(<type,event>)->Subscribers
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std::map<MediaObservableFilter, SubscriberMap> mObservableToSubscribersMap
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GUARDED_BY(mObserverLock);
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::ndk::ScopedAIBinder_DeathRecipient mDeathRecipient;
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// Binder death handling.
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static std::mutex sDeathRecipientLock;
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static std::map<uintptr_t, std::shared_ptr<DeathRecipient>> sDeathRecipientMap
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GUARDED_BY(sDeathRecipientLock);
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static void BinderDiedCallback(void* cookie);
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void notifyObservers(MediaObservableEvent event,
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int uid, int pid, const ResourceList &resources);
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};
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// ----------------------------------------------------------------------------
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} // namespace android
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#endif // ANDROID_MEDIA_RESOURCE_OBSERVER_SERVICE_H
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