singleton

[Ron Eggler]

Hi,

I'm trying to define a sinlgeton class but I'm having troubles to get it
compiled, my declaration looks like:

#include "tspthread.h"

#ifndef GPIOCONTROL_H_
#define GPIOCONTROL_H_


class GPIOcontrol: public TSPThread
{
public:
static GPIOcontrol* Instance();

protected:
GPIOcontrol();
virtual ~GPIOcontrol();

private:
/**
* The main thread method
*/
virtual void run();
static GPIOcontrol* pinstance;
};

#endif /*GPIOCONTROL_H_*/

But it doesn't compile on the line "static GPIOcontrol* Instance();" it
tells me "error: candidate is: static GPIOcontrol* GPIOcontrol::Instance()"
and i don't understand what coudl be wrong, any help would be appreciated!

Thanks!
Ron

 

[Ian Collins]

Hi,

I'm trying to define a sinlgeton class but I'm having troubles to get it
compiled, my declaration looks like:

#include "tspthread.h"

#ifndef GPIOCONTROL_H_
#define GPIOCONTROL_H_


class GPIOcontrol: public TSPThread
{
public:
static GPIOcontrol* Instance();

protected:
GPIOcontrol();
virtual ~GPIOcontrol();

private:
/**
* The main thread method
*/
virtual void run();
static GPIOcontrol* pinstance;
};

#endif /*GPIOCONTROL_H_*/

But it doesn't compile on the line "static GPIOcontrol* Instance();" it
tells me "error: candidate is: static GPIOcontrol* GPIOcontrol::Instance()"
and i don't understand what coudl be wrong, any help would be appreciated!

Assuming a sane declaration for TSPThread, there doesn't appear to be
anything wrong with your code.

Post the exact error.

 

[mrkdb]

I think, you need to initialise the static instance.

 

[Ron Eggler]

Assuming a sane declaration for TSPThread, there doesn't appear to be
anything wrong with your code.

Post the exact error.

Ian, nevermind, I got it, i had a typo in my implementation and the error
message just confused me since it pointed to the declaration...

Thanks to look at it anyways.