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/***************************************************************************** |
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* |
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* Copyright 2010 Richard Hacker (lerichi at gmx dot net) |
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* |
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* This file is part of the pdserv library. |
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* |
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* The pdserv library is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser General Public License as published |
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* by the Free Software Foundation, either version 3 of the License, or (at |
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* your option) any later version. |
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* |
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* The pdserv library is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
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* License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with the pdserv library. If not, see <http://www.gnu.org/licenses/>. |
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* |
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****************************************************************************/ |
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#ifndef SUBSCRIPTIONMANAGER_H |
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#define SUBSCRIPTIONMANAGER_H |
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#include "../SessionTask.h" |
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#include <set> |
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#include <map> |
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#include <memory> |
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namespace PdServ { |
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class Task; |
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struct TaskStatistics; |
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} |
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namespace MsrProto { |
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class Channel; |
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class Subscription; |
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class Session; |
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class SubscriptionManager: public PdServ::SessionTask { |
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public: |
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SubscriptionManager(Session *session, const PdServ::Task*); |
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~SubscriptionManager(); |
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Session * const session; |
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void rxPdo(bool quiet); |
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void clear(); |
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void unsubscribe(const Channel *s, size_t group); |
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void subscribe(const Channel *s, size_t group, |
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size_t decimation, size_t blocksize, |
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bool base64, std::streamsize precision); |
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void sync(); |
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const struct timespec *taskTime; |
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const PdServ::TaskStatistics *taskStatistics; |
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private: |
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static struct timespec dummyTime; |
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static PdServ::TaskStatistics dummyTaskStatistics; |
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// Here is a map of all subscribed channels. Organization: |
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// signalSubscriptionMap |
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// -> [signal] |
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// -> [channel] |
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// -> [group] |
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// -> subscription |
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typedef std::map<size_t, Subscription*> SubscriptionGroup; |
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typedef std::map<const Channel*, SubscriptionGroup> |
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ChannelSubscriptionMap; |
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typedef std::map<const PdServ::Signal*, ChannelSubscriptionMap> |
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SignalSubscriptionMap; |
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SignalSubscriptionMap signalSubscriptionMap; |
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// Here is a template class that implements a decimation counter |
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template <class T> |
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struct DecimationCounter: std::map<size_t, T> { |
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DecimationCounter(): counter(0) {} |
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bool busy(size_t start) { |
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if (!counter) |
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counter = start; |
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return --counter; |
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} |
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size_t counter; |
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}; |
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// Here are the active signals, those that are transferred via shmem. |
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// Organization: activeSignals |
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// -> [group] |
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// -> [decimation] |
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// -> [blocksize] |
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// -> subscriptionSet |
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// -> subscription |
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struct SubscriptionSet: std::set<Subscription*> { |
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std::unique_ptr<uint64_t[]> time; |
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uint64_t *timePtr; |
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}; |
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typedef DecimationCounter<SubscriptionSet> BlocksizeGroup; |
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typedef std::map<size_t, BlocksizeGroup> DecimationGroup; |
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typedef std::map<size_t, DecimationGroup> ActiveSignals; |
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ActiveSignals activeSignals; |
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std::set<const PdServ::Signal*> activeSignalSet; |
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void remove(Subscription *s, size_t group); |
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// Reimplemented from PdServ::SessionTask |
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void newSignal( const PdServ::Signal *); |
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}; |
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} |
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#endif //SUBSCRIPTIONMANAGER_H |
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