mirror of
https://github.com/FairRootGroup/FairMQ.git
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a8c76accdc
This change is needed to share the functionality between the core library and the SDK library. We want to support building/installing just the SDK without having a dependency on the core library which adds additional dependencies.
110 lines
2.9 KiB
C++
110 lines
2.9 KiB
C++
/********************************************************************************
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* Copyright (C) 2014 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH *
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* *
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* This software is distributed under the terms of the *
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* GNU Lesser General Public Licence (LGPL) version 3, *
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* copied verbatim in the file "LICENSE" *
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********************************************************************************/
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#ifndef FAIRMQSTATEMACHINE_H_
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#define FAIRMQSTATEMACHINE_H_
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#include <fairlogger/Logger.h>
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#include <string>
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#include <memory>
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#include <functional>
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#include <condition_variable>
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#include <ostream>
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#include <queue>
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#include <mutex>
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#include <stdexcept>
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namespace fair
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{
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namespace mq
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{
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enum class State : int
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{
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Ok,
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Error,
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Idle,
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InitializingDevice,
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Initialized,
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Binding,
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Bound,
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Connecting,
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DeviceReady,
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InitializingTask,
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Ready,
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Running,
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ResettingTask,
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ResettingDevice,
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Exiting
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};
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enum class Transition : int
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{
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Auto,
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InitDevice,
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CompleteInit,
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Bind,
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Connect,
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InitTask,
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Run,
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Stop,
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ResetTask,
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ResetDevice,
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End,
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ErrorFound
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};
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class StateMachine
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{
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public:
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StateMachine();
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virtual ~StateMachine();
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bool ChangeState(const Transition transition);
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bool ChangeState(const std::string& transition) { return ChangeState(GetTransition(transition)); }
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void SubscribeToStateChange(const std::string& key, std::function<void(const State)> callback);
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void UnsubscribeFromStateChange(const std::string& key);
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void HandleStates(std::function<void(const State)> callback);
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void StopHandlingStates();
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void SubscribeToNewTransition(const std::string& key, std::function<void(const Transition)> callback);
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void UnsubscribeFromNewTransition(const std::string& key);
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bool NewStatePending() const;
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void WaitForPendingState() const;
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bool WaitForPendingStateFor(const int durationInMs) const;
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State GetCurrentState() const;
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std::string GetCurrentStateName() const;
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void Start();
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void ProcessWork();
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static std::string GetStateName(const State);
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static std::string GetTransitionName(const Transition);
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static State GetState(const std::string& state);
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static Transition GetTransition(const std::string& transition);
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struct ErrorStateException : std::runtime_error { using std::runtime_error::runtime_error; };
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private:
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std::shared_ptr<void> fFsm;
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};
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inline std::ostream& operator<<(std::ostream& os, const State& state) { return os << StateMachine::GetStateName(state); }
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inline std::ostream& operator<<(std::ostream& os, const Transition& transition) { return os << StateMachine::GetTransitionName(transition); }
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} // namespace mq
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} // namespace fair
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#endif /* FAIRMQSTATEMACHINE_H_ */
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