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