125 lines
4.7 KiB
C++
125 lines
4.7 KiB
C++
/*
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* Copyright (C) 2016 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 <set>
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#include <android/hidl/manager/1.2/IServiceManager.h>
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#include <hidl/Status.h>
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#include <hidl/MQDescriptor.h>
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namespace android {
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namespace hidl {
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namespace manager {
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namespace implementation {
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using ::android::hardware::hidl_vec;
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using ::android::hardware::hidl_string;
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using ::android::hardware::Return;
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using ::android::hardware::Void;
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using ::android::hidl::base::V1_0::IBase;
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using ::android::hidl::manager::V1_0::IServiceNotification;
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using ::android::hidl::manager::V1_1::IServiceManager;
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using ::android::hidl::manager::V1_2::IClientCallback;
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using ::android::sp;
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struct HidlService {
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HidlService(const std::string &interfaceName,
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const std::string &instanceName,
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const sp<IBase> &service,
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const pid_t pid);
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HidlService(const std::string &interfaceName,
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const std::string &instanceName)
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: HidlService(
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interfaceName,
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instanceName,
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nullptr,
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static_cast<pid_t>(IServiceManager::PidConstant::NO_PID))
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{}
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virtual ~HidlService() {}
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/**
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* Note, getService() can be nullptr. This is because you can have a HidlService
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* with registered IServiceNotification objects but no service registered yet.
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*/
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sp<IBase> getService() const;
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void setService(sp<IBase> service, pid_t pid);
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pid_t getDebugPid() const;
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const std::string &getInterfaceName() const;
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const std::string &getInstanceName() const;
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void addListener(const sp<IServiceNotification> &listener);
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bool removeListener(const wp<IBase> &listener);
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void registerPassthroughClient(pid_t pid);
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// also sends onClients(true) if we have clients
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// knownClientCount, see forceHandleClientCallbacks
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void addClientCallback(const sp<IClientCallback>& callback, size_t knownClientCount);
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bool removeClientCallback(const sp<IClientCallback>& callback);
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// return is if we are guaranteed to have a client
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// knownClientCount, see forceHandleClientCallbacks
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bool handleClientCallbacks(bool isCalledOnInterval, size_t knownClientCount);
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// Updates client callbacks (even if mClientCallbacks is emtpy)
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// see handleClientCallbacks
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//
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// knownClientCount - this is the number of clients that is currently
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// expected to be in use by known actors. This number of clients must be
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// exceeded in order to consider the service to have clients.
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//
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// returns whether or not this service has clients
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bool forceHandleClientCallbacks(bool isCalledOnInterval, size_t knownClientCount);
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// when giving out a handle to a client, but the kernel might not know this yet
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void guaranteeClient();
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std::string string() const; // e.x. "android.hidl.manager@1.0::IServiceManager/manager"
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const std::set<pid_t> &getPassthroughClients() const;
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protected:
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// mockable number of clients including hwservicemanager. -1 if not implemented or unavailable.
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virtual ssize_t getNodeStrongRefCount();
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private:
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void sendRegistrationNotifications();
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// Also updates mHasClients (of what the last callback was)
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void sendClientCallbackNotifications(bool hasClients);
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// Only sends notification
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void sendClientCallbackNotification(const sp<IClientCallback>& callback, bool hasClients);
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const std::string mInterfaceName; // e.x. "android.hidl.manager@1.0::IServiceManager"
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const std::string mInstanceName; // e.x. "manager"
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sp<IBase> mService;
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std::vector<sp<IServiceNotification>> mListeners{};
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std::set<pid_t> mPassthroughClients{};
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pid_t mPid = static_cast<pid_t>(IServiceManager::PidConstant::NO_PID);
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std::vector<sp<IClientCallback>> mClientCallbacks{};
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bool mHasClients = false; // notifications sent on true -> false.
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bool mGuaranteeClient = false; // whenever a client is handed out
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size_t mNoClientsCounter = 0;
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};
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} // namespace implementation
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} // namespace manager
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} // namespace hidl
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} // namespace android
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