LockGuard.h

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#ifndef LOCK_GUARD_H
#define LOCK_GUARD_H

#include <memory>
class SerialPortHandler;

class LockGuard {
public:
    // CTOR, DTOR, and initializer
    LockGuard();
    ~LockGuard();
    void Init(std::shared_ptr<SerialPortHandler> a_SerialPortHandler);
    
    // Influende the serial port, obtain and release locks, called by a ClientHandler
    void AcquireLock();
    void ReleaseLock();
    
    // Update the effective state of a serial port
    bool UpdateSerialPortState(size_t a_LockHolders);
    
    
    bool IsLocked() const { return (m_bLockedBySelf || m_bLockedByOthers); }
    
    bool IsLockedBySelf() const { return m_bLockedBySelf; }
    
    bool IsLockedByOthers() const { return m_bLockedByOthers; }

private:
    // Members
    std::shared_ptr<SerialPortHandler> m_SerialPortHandler; 
    bool m_bLockedBySelf;       
    bool m_bLockedByOthers;     
    bool m_bLastLockedBySelf;   
    bool m_bLastLockedByOthers; 
};

#endif // LOCK_GUARD_H