port.h

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#ifndef VSERIAL_PORT_H
#define VSERIAL_PORT_H

#include <poll.h>

class Port {
protected:
    const char* m_conn_string;
    struct pollfd* m_pollfd_ptr;
    Port(const char* conn_string, struct pollfd* pollfd_ptr);

public:
    virtual ~Port();
    static Port* create(const char *conn_string, struct pollfd* pollfd_ptr);
  
    virtual ssize_t read(void *buf, size_t count) = 0; 
    virtual ssize_t write(void *buf, size_t count) = 0; 

    short poll_revents(); 
};

class PtyPort: public Port {
private:
    const char* m_path;
    int         m_slavefd;

    void _create_pty();
    void _respawn_pty();

public:
    PtyPort(const char *path, struct pollfd* pollfd_ptr);
    virtual ssize_t read(void *buf, size_t count); 
    virtual ssize_t write(void *buf, size_t count); 

    virtual ~PtyPort();
};

class SerialPort: public Port {
public:
    SerialPort(const char *conn_string, pollfd* pollfd_ptr);
    virtual ssize_t read(void *buf, size_t count); 
    virtual ssize_t write(void *buf, size_t count); 

    virtual ~SerialPort();
};

class PortException {
public:
    const char* conn_str;
    const char* message;
    PortException(const char* con, const char* msg);
};

#endif // VSERIAL_PORT_H