CppMSG/Lobby

Hi,
I want to write a C Wrapper for C++.
the serial library is in C++ and I would like use some methods from the C++ serial library.

I have created a C++ wrapper header and a .cpp source as wrapper.h and wrapper.cpp. Which goes as :

// wrapper.h
#ifdef __cplusplus
extern "C" {
#endif

#include <stdint.h>

typedef struct pserial pserial_t;

pserial_t * new_serial(char * port, uint32_t baud);
void delete_serial(pserial_t* d);

#ifdef __cplusplus
}
#endif

and wrapper.cpp as :

#include "wrapper.h"
#include "serial/serial.h"

extern "C" {

    pserial_t * new_serial(char * port, uint32_t baud) {
        std::string _port = std::string(port);
        return new serial::Serial(_port, baud);
    }

    void delete_serial(pserial_t* serl) {
        delete static_cast<serial::Serial*>(serl);
    }    
}

but I am getting errors like :
error: cannot convert ‘serial::Serial*’ to ‘pserial_t*’ {aka ‘pserial*’} in return
and
error: invalid static_cast from type ‘pserial_t*’ {aka ‘pserial*’} to type ‘serial::Serial*’
I am not getting the clue to resolve it, humbly request for some suggestions :)