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* Copyright (C) 2019 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
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
#pragma once
#include <android/os/BnServiceManager.h>
#include <android/os/IClientCallback.h>
#include <android/os/IServiceCallback.h>
#include "Access.h"
namespace android {
using os::IClientCallback;
using os::IServiceCallback;
class ServiceManager : public os::BnServiceManager, public IBinder::DeathRecipient {
ServiceManager(std::unique_ptr<Access>&& access);
// getService will try to start any services it cannot find
binder::Status getService(const std::string& name, sp<IBinder>* outBinder) override;
binder::Status checkService(const std::string& name, sp<IBinder>* outBinder) override;
binder::Status addService(const std::string& name, const sp<IBinder>& binder,
bool allowIsolated, int32_t dumpPriority) override;
binder::Status listServices(int32_t dumpPriority, std::vector<std::string>* outList) override;
binder::Status registerForNotifications(const std::string& name,
const sp<IServiceCallback>& callback) override;
binder::Status unregisterForNotifications(const std::string& name,
const sp<IServiceCallback>& callback) override;
binder::Status isDeclared(const std::string& name, bool* outReturn) override;
binder::Status registerClientCallback(const std::string& name, const sp<IBinder>& service,
const sp<IClientCallback>& cb) override;
binder::Status tryUnregisterService(const std::string& name, const sp<IBinder>& binder) override;
void binderDied(const wp<IBinder>& who) override;
void handleClientCallbacks();
virtual void tryStartService(const std::string& name);
struct Service {
sp<IBinder> binder; // not null
bool allowIsolated;
int32_t dumpPriority;
bool hasClients = false; // notifications sent on true -> false.
bool guaranteeClient = false; // forces the client check to true
pid_t debugPid = 0; // the process in which this service runs
// the number of clients of the service, including servicemanager itself
ssize_t getNodeStrongRefCount();
using ServiceCallbackMap = std::map<std::string, std::vector<sp<IServiceCallback>>>;
using ClientCallbackMap = std::map<std::string, std::vector<sp<IClientCallback>>>;
using ServiceMap = std::map<std::string, Service>;
// removes a callback from mNameToRegistrationCallback, removing it if the vector is empty
// this updates iterator to the next location
void removeRegistrationCallback(const wp<IBinder>& who,
ServiceCallbackMap::iterator* it,
bool* found);
ssize_t handleServiceClientCallback(const std::string& serviceName, bool isCalledOnInterval);
// Also updates mHasClients (of what the last callback was)
void sendClientCallbackNotifications(const std::string& serviceName, bool hasClients);
// removes a callback from mNameToClientCallback, deleting the entry if the vector is empty
// this updates the iterator to the next location
void removeClientCallback(const wp<IBinder>& who, ClientCallbackMap::iterator* it);
sp<IBinder> tryGetService(const std::string& name, bool startIfNotFound);
ServiceMap mNameToService;
ServiceCallbackMap mNameToRegistrationCallback;
ClientCallbackMap mNameToClientCallback;
std::unique_ptr<Access> mAccess;
} // namespace android