Getting error : "could not determine kind of name for C.functionName()" with cgo

I am trying to wrap, C++ library using Go. Here I have a header file and a CPP file and I have written a wrapper for it in Go and trying to call the, but I get the error :

could not determine the kind of name for C.getName
could not determine kind of name for C.reset

All three files are in the same directory and the command used from the directory is :

> go build CountersImpl.go
>
> Other Details : Windows 10-64, Using Vscode, go version: 1.16.4

A few lines from the files with filename
CountersImpl.h

#ifndef SRC_HOTROD_API_COUNTERSIMPL_H_
#define SRC_HOTROD_API_COUNTERSIMPL_H_

#ifdef __cplusplus
#include "infinispan\hotrod\CounterConfiguration.h"
#include "hotrod\impl\RemoteCounterManagerImpl.h"
#include <string>
#include <future>
extern "C" {
#endif

#ifdef __cplusplus
namespace infinispan {
namespace hotrod {

class BaseCounterImpl: public virtual Counter {
public:
    BaseCounterImpl(RemoteCounterManagerImpl& rcm, std::string name, CounterConfiguration configuration) :
            rcm(rcm), name(name), configuration(configuration), removed(false) {
    }

    std::string getName() {
        return name;
    }
    CounterConfiguration getConfiguration() {
        return configuration;
    }

    void setRemoved() {
        removed = true;
    }

    void reset();

    void remove();

    virtual long getValue();

    const void* addListener(const event::CounterListener* listener);

    void removeListener(const void* handler);

    virtual ~BaseCounterImpl() {
    }

CountersImpl.cpp

#include <hotrod\api\CountersImpl.h>
#include "hotrod\impl\operations\CounterOperations.h"

namespace infinispan {
namespace hotrod {

using namespace infinispan::hotrod::operations;

void BaseCounterImpl::reset() {
    ResetCounterOperation op(*rcm.codec, rcm.transportFactory, rcm.topology, 0, name);
    op.execute();
}

void BaseCounterImpl::remove() {
    RemoveCounterOperation op(*rcm.codec, rcm.transportFactory, rcm.topology, 0, name);
    op.execute();
    setRemoved();
}

long BaseCounterImpl::getValue() {
    GetCounterValueOperation op(*rcm.codec, rcm.transportFactory, rcm.topology, 0, name);
    return op.execute();
}

CountersImpl.go

package CountersImpl

// #include "CountersImpl.h"
import "C"
import "fmt"
func main() {

	fmt.Println("name : ",C.getName())
	C.reset()
}

cgo only understands C, not C++. The #ifdef __cplusplus directives in your .h file remove its contents when building the file as an ordinary C source file.

Moreover, the C++ methods infinispan::hotrod::BaseCounterImpl::getName and infinispan::hotrod::BaseCounterImpl::reset are not C function names. A BaseCounterImpl method must be called on a BaseCounterImpl object, and C doesn't know anything about objects.

To call a C++ method from C, you generally need to define a corresponding C wrapper function that accepts a pointer to the this object. See https://isocpp.org/wiki/faq/mixing-c-and-cpp for more detail.

Once you have a wrapper that can call the needed C++ functions from C, then you can use cgo to invoke the C wrapper function from Go.