opl_serial_port: Fixed the polymorphism

3 files changed, 9 insertions, 8 deletions

diff --git a/src/chips/opl_serial_misc.h b/src/chips/opl_serial_misc.h
index 84711c3..6972a1e 100644
--- a/src/chips/opl_serial_misc.h
+++ b/src/chips/opl_serial_misc.h
@@ -43,19 +43,19 @@ public:
     ChipSerialPortBase() {}
     virtual ~ChipSerialPortBase() {}
 
-    bool isOpen()
+    virtual bool isOpen()
     {
         return false;
     }
 
-    void close() {}
+    virtual void close() {}
 
-    bool open(const std::string &/*portName*/, unsigned /*baudRate*/)
+    virtual bool open(const std::string &/*portName*/, unsigned /*baudRate*/)
     {
         return false;
     }
 
-    int write(uint8_t */*data*/, size_t /*size*/)
+    virtual int write(uint8_t * /*data*/, size_t /*size*/)
     {
         return 0;
     }
@@ -112,7 +112,8 @@ class ChipSerialPort : public ChipSerialPortBase
     }
 
 public:
-    ChipSerialPort() : ChipSerialPortBase()
+    ChipSerialPort() :
+        ChipSerialPortBase()
     {
         m_port = 0;
         std::memset(&m_portSetup, 0, sizeof(struct termios));
diff --git a/src/chips/opl_serial_port.cpp b/src/chips/opl_serial_port.cpp
index 0d2e58d..1607d8c 100644
--- a/src/chips/opl_serial_port.cpp
+++ b/src/chips/opl_serial_port.cpp
@@ -97,7 +97,7 @@ bool OPL_SerialPort::connectPort(const std::string& name, unsigned baudRate, uns
 void OPL_SerialPort::writeReg(uint16_t addr, uint8_t data)
 {
     uint8_t sendBuffer[16];
-    ChipSerialPort *port = m_port;
+    ChipSerialPortBase *port = m_port;
 
     if(!port || !port->isOpen())
         return;
diff --git a/src/chips/opl_serial_port.h b/src/chips/opl_serial_port.h
index ec7bc39..346c68e 100644
--- a/src/chips/opl_serial_port.h
+++ b/src/chips/opl_serial_port.h
@@ -27,7 +27,7 @@
 #include <string>
 #include "opl_chip_base.h"
 
-class ChipSerialPort;
+class ChipSerialPortBase;
 
 class OPL_SerialPort : public OPLChipBaseT<OPL_SerialPort>
 {
@@ -56,7 +56,7 @@ public:
     ChipType chipType() override;
 
 private:
-    ChipSerialPort *m_port;
+    ChipSerialPortBase *m_port;
     int m_protocol;
 };