182 lines
7.1 KiB
C++
182 lines
7.1 KiB
C++
/* Copyright (c) 2015-2017, 2020 The Linux Foundation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of The Linux Foundation, nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef __SYSTEM_STATUS_OSOBSERVER__
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#define __SYSTEM_STATUS_OSOBSERVER__
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#include <cinttypes>
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#include <string>
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#include <list>
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#include <map>
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#include <new>
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#include <vector>
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#include <MsgTask.h>
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#include <DataItemId.h>
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#include <IOsObserver.h>
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#include <loc_pla.h>
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#include <log_util.h>
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#include <LocUnorderedSetMap.h>
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namespace loc_core
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{
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/******************************************************************************
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SystemStatusOsObserver
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******************************************************************************/
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using namespace std;
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using namespace loc_util;
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// Forward Declarations
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class IDataItemCore;
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class SystemStatus;
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class SystemStatusOsObserver;
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typedef map<IDataItemObserver*, list<DataItemId>> ObserverReqCache;
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typedef LocUnorderedSetMap<IDataItemObserver*, DataItemId> ClientToDataItems;
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typedef LocUnorderedSetMap<DataItemId, IDataItemObserver*> DataItemToClients;
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typedef unordered_map<DataItemId, IDataItemCore*> DataItemIdToCore;
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typedef unordered_map<DataItemId, int> DataItemIdToInt;
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#ifdef USE_GLIB
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// Cache details of backhaul client requests
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typedef unordered_set<string> ClientBackhaulReqCache;
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#endif
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struct ObserverContext {
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IDataItemSubscription* mSubscriptionObj;
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IFrameworkActionReq* mFrameworkActionReqObj;
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const MsgTask* mMsgTask;
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SystemStatusOsObserver* mSSObserver;
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inline ObserverContext(const MsgTask* msgTask, SystemStatusOsObserver* observer) :
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mSubscriptionObj(NULL), mFrameworkActionReqObj(NULL),
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mMsgTask(msgTask), mSSObserver(observer) {}
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};
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// Clients wanting to get data from OS/Framework would need to
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// subscribe with OSObserver using IDataItemSubscription interface.
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// Such clients would need to implement IDataItemObserver interface
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// to receive data when it becomes available.
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class SystemStatusOsObserver : public IOsObserver {
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public:
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// ctor
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inline SystemStatusOsObserver(SystemStatus* systemstatus, const MsgTask* msgTask) :
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mSystemStatus(systemstatus), mContext(msgTask, this),
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mAddress("SystemStatusOsObserver"),
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mClientToDataItems(MAX_DATA_ITEM_ID), mDataItemToClients(MAX_DATA_ITEM_ID) {}
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// dtor
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~SystemStatusOsObserver();
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template <typename CINT, typename COUT>
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static COUT containerTransfer(CINT& s);
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template <typename CINT, typename COUT>
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inline static COUT containerTransfer(CINT&& s) {
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return containerTransfer<CINT, COUT>(s);
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}
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// To set the subscription object
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virtual void setSubscriptionObj(IDataItemSubscription* subscriptionObj);
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// To set the framework action request object
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inline void setFrameworkActionReqObj(IFrameworkActionReq* frameworkActionReqObj) {
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mContext.mFrameworkActionReqObj = frameworkActionReqObj;
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#ifdef USE_GLIB
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uint32_t numBackHaulClients = mBackHaulConnReqCache.size();
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if (numBackHaulClients > 0) {
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// For each client, invoke connectbackhaul.
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for (auto clientName : mBackHaulConnReqCache) {
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LOC_LOGd("Invoke connectBackhaul for client: %s", clientName.c_str());
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connectBackhaul(clientName);
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}
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// Clear the set
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mBackHaulConnReqCache.clear();
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}
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#endif
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}
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// IDataItemSubscription Overrides
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inline virtual void subscribe(const list<DataItemId>& l, IDataItemObserver* client) override {
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subscribe(l, client, false);
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}
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virtual void updateSubscription(const list<DataItemId>& l, IDataItemObserver* client) override;
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inline virtual void requestData(const list<DataItemId>& l, IDataItemObserver* client) override {
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subscribe(l, client, true);
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}
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virtual void unsubscribe(const list<DataItemId>& l, IDataItemObserver* client) override;
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virtual void unsubscribeAll(IDataItemObserver* client) override;
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// IDataItemObserver Overrides
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virtual void notify(const list<IDataItemCore*>& dlist) override;
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inline virtual void getName(string& name) override {
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name = mAddress;
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}
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// IFrameworkActionReq Overrides
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virtual void turnOn(DataItemId dit, int timeOut = 0) override;
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virtual void turnOff(DataItemId dit) override;
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#ifdef USE_GLIB
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virtual bool connectBackhaul(const string& clientName) override;
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virtual bool disconnectBackhaul(const string& clientName) override;
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#endif
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private:
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SystemStatus* mSystemStatus;
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ObserverContext mContext;
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const string mAddress;
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ClientToDataItems mClientToDataItems;
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DataItemToClients mDataItemToClients;
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DataItemIdToCore mDataItemCache;
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DataItemIdToInt mActiveRequestCount;
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// Cache the subscribe and requestData till subscription obj is obtained
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void cacheObserverRequest(ObserverReqCache& reqCache,
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const list<DataItemId>& l, IDataItemObserver* client);
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#ifdef USE_GLIB
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// Cache the framework action request for connect/disconnect
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ClientBackhaulReqCache mBackHaulConnReqCache;
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#endif
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void subscribe(const list<DataItemId>& l, IDataItemObserver* client, bool toRequestData);
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// Helpers
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void sendCachedDataItems(const unordered_set<DataItemId>& s, IDataItemObserver* to);
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bool updateCache(IDataItemCore* d);
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inline void logMe(const unordered_set<DataItemId>& l) {
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IF_LOC_LOGD {
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for (auto id : l) {
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LOC_LOGD("DataItem %d", id);
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}
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}
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}
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};
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} // namespace loc_core
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#endif //__SYSTEM_STATUS__
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