StateMachineProfiler.h

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#pragma once
 
#include <QtCore/QElapsedTimer>
#include <QtCore/QHash>
#include <QtCore/QJsonObject>
#include <QtCore/QObject>
#include <QtCore/QString>
 
class QAbstractState;
class QGCStateMachine;
 
class StateMachineProfiler : public QObject
{
    Q_OBJECT
 
public:
    struct StateProfile {
        QString name;
        int entryCount = 0;
        qint64 totalTimeMs = 0;
        qint64 minTimeMs = std::numeric_limits<qint64>::max();
        qint64 maxTimeMs = 0;
        qint64 lastEntryTime = 0;
 
        double averageTimeMs() const {
            return entryCount > 0 ? static_cast<double>(totalTimeMs) / entryCount : 0.0;
        }
    };
 
    explicit StateMachineProfiler(QGCStateMachine* machine);
    ~StateMachineProfiler() override = default;
 
    void setEnabled(bool enabled);
    bool isEnabled() const { return _enabled; }
 
    void reset();
 
    StateProfile profile(const QString& stateName) const;
 
    QHash<QString, StateProfile> allProfiles() const { return _profiles; }
 
    qint64 totalRuntimeMs() const { return _totalRuntimeMs; }
 
    int transitionCount() const { return _transitionCount; }
 
    QString summary() const;
 
    QJsonObject toJson() const;
 
    void logProfile() const;
 
private slots:
    void _onMachineStarted();
    void _onMachineStopped();
    void _onStateEntered();
    void _onStateExited();
 
private:
    QGCStateMachine* _machine = nullptr;
    bool _enabled = false;
 
    QHash<QString, StateProfile> _profiles;
    QElapsedTimer _machineTimer;
    QElapsedTimer _stateTimer;
    qint64 _totalRuntimeMs = 0;
    int _transitionCount = 0;
 
    QString _currentStateName;
    QList<QMetaObject::Connection> _stateConnections;
};