116 lines
5.1 KiB
C++
116 lines
5.1 KiB
C++
/*
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* Copyright (C) 2019 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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#pragma once
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#include <android/os/BnServiceManager.h>
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#include <android/os/IClientCallback.h>
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#include <android/os/IServiceCallback.h>
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#include "Access.h"
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namespace android {
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using os::ConnectionInfo;
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using os::IClientCallback;
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using os::IServiceCallback;
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using os::ServiceDebugInfo;
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class ServiceManager : public os::BnServiceManager, public IBinder::DeathRecipient {
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public:
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ServiceManager(std::unique_ptr<Access>&& access);
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~ServiceManager();
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// getService will try to start any services it cannot find
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binder::Status getService(const std::string& name, sp<IBinder>* outBinder) override;
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binder::Status checkService(const std::string& name, sp<IBinder>* outBinder) override;
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binder::Status addService(const std::string& name, const sp<IBinder>& binder,
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bool allowIsolated, int32_t dumpPriority) override;
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binder::Status listServices(int32_t dumpPriority, std::vector<std::string>* outList) override;
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binder::Status registerForNotifications(const std::string& name,
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const sp<IServiceCallback>& callback) override;
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binder::Status unregisterForNotifications(const std::string& name,
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const sp<IServiceCallback>& callback) override;
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binder::Status isDeclared(const std::string& name, bool* outReturn) override;
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binder::Status getDeclaredInstances(const std::string& interface, std::vector<std::string>* outReturn) override;
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binder::Status updatableViaApex(const std::string& name,
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std::optional<std::string>* outReturn) override;
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binder::Status getUpdatableNames(const std::string& apexName,
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std::vector<std::string>* outReturn) override;
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binder::Status getConnectionInfo(const std::string& name,
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std::optional<ConnectionInfo>* outReturn) override;
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binder::Status registerClientCallback(const std::string& name, const sp<IBinder>& service,
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const sp<IClientCallback>& cb) override;
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binder::Status tryUnregisterService(const std::string& name, const sp<IBinder>& binder) override;
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binder::Status getServiceDebugInfo(std::vector<ServiceDebugInfo>* outReturn) override;
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void binderDied(const wp<IBinder>& who) override;
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void handleClientCallbacks();
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/**
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* This API is added for debug purposes. It clears members which hold service and callback
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* information.
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*/
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void clear();
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protected:
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virtual void tryStartService(const std::string& name);
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private:
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struct Service {
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sp<IBinder> binder; // not null
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bool allowIsolated;
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int32_t dumpPriority;
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bool hasClients = false; // notifications sent on true -> false.
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bool guaranteeClient = false; // forces the client check to true
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Access::CallingContext ctx; // process that originally registers this
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// the number of clients of the service, including servicemanager itself
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ssize_t getNodeStrongRefCount();
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~Service();
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};
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using ServiceCallbackMap = std::map<std::string, std::vector<sp<IServiceCallback>>>;
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using ClientCallbackMap = std::map<std::string, std::vector<sp<IClientCallback>>>;
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using ServiceMap = std::map<std::string, Service>;
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// removes a callback from mNameToRegistrationCallback, removing it if the vector is empty
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// this updates iterator to the next location
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void removeRegistrationCallback(const wp<IBinder>& who,
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ServiceCallbackMap::iterator* it,
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bool* found);
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// returns whether there are known clients in addition to the count provided
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bool handleServiceClientCallback(size_t knownClients, const std::string& serviceName,
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bool isCalledOnInterval);
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// Also updates mHasClients (of what the last callback was)
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void sendClientCallbackNotifications(const std::string& serviceName, bool hasClients,
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const char* context);
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// removes a callback from mNameToClientCallback, deleting the entry if the vector is empty
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// this updates the iterator to the next location
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void removeClientCallback(const wp<IBinder>& who, ClientCallbackMap::iterator* it);
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sp<IBinder> tryGetService(const std::string& name, bool startIfNotFound);
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ServiceMap mNameToService;
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ServiceCallbackMap mNameToRegistrationCallback;
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ClientCallbackMap mNameToClientCallback;
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std::unique_ptr<Access> mAccess;
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};
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} // namespace android
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