Simple service base class for Windows

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Introduction

The purpose of this code is to show how to make a simple C++ class which wraps WinNT API for service programs. With this class, you can implement a Windows service in a few minutes. This class is not made for advanced service programming, but it should not be too hard modify this source to append any additional functionality. When I implemented this class, I was trying to copy the interface of ServiceBase class from .NET framework. I think it's good design for most requirements of service applications.

Have on mind that using this class you can't implement multiple services in one application. I will implement this in future updates and add more functionality.

Using the code

I didn't provide a sample project this time but here is the code you need for that:

#include <windows.h>
#include <stdio.h>
#include "smart_reference.h"
#include "I_ServiceBase.h"

void WriteLog(const char* message)
{
    FILE* pFile = fopen("C:\\test_service.log","a");
    if(pFile)
    {
        fwrite(message, sizeof(char), strlen(message), pFile); 
        fclose(pFile);
    }
}

class TestService : public CI_ServiceBase
{
public:
    TestService()
    {
        m_bStop = false;
    }

    ~TestService()
    {
        CI_ServiceBase::~CI_ServiceBase();
    }

    virtual void OnStart(int argc, LPTSTR* argv)
    {
        WriteLog("Server started.\n\r");
        while(!m_bStop)
        {
            Sleep(1000);
        }
    }
    virtual void OnStop()
    {
        WriteLog("Server stopped.\n\r");
        m_bStop = true;
    }

    virtual void OnPause()
    {
        WriteLog("Server paused.\n\r");
    }

    virtual void OnContinue()
    {
        WriteLog("Server continued.\n\r");
    }

private:
    bool m_bStop;
};

TestService ts;

int main(int argc, char* argv[])
{
    ts.set_CanPauseAndContinue(false);
    ts.set_ServiceName("isw_test");
    CI_ServiceBase::Run((TestService*)ts);
    return 0;
}