flipcode - Singleton Class

Singleton Class
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Here is a singleton class that allows you to have only one instance of an object. Good for multi-threaded environments that require access to shared data and functionality ie Game Window, Network Transport Managers, AI Managers, etc.. The list goes on. Have fun,
Dave

Currently browsing [singleton.zip] (2,177 bytes) - [Singleton.h] - (276 bytes)

/* Dave Pallot */
/* 2000 */

class Singleton
{
private:
	Singleton();
	virtual ~Singleton();

public:
	static Singleton* m_instance;
	static Singleton* instance();
	static void destroy();

public:
	void func1();
	int func2();

private:
	char* m_buffer;
};

Currently browsing [singleton.zip] (2,177 bytes) - [Singleton.cpp] - (631 bytes)

/* Dave Pallot */
/* 2000 */

#include "Singleton.h"
#include <iostream>

Singleton* Singleton::m_instance = 0;

Singleton::Singleton()
{
	m_buffer = new char[40];
	::memset(m_buffer, 0, 40);
}


Singleton::~Singleton()
{
	delete[] m_buffer;
}

Singleton* Singleton::instance()
{
	if (m_instance == 0)
	{
		m_instance = new Singleton();
	}

	return m_instance;
}


void Singleton::destroy()
{
	delete m_instance;
	m_instance = 0;
}


void Singleton::func1()
{
	::strcpy(m_buffer, "Func 1 called");;
}


int Singleton::func2()
{
	std::cout << m_buffer << std::endl;
	return 0;
}

Currently browsing [singleton.zip] (2,177 bytes) - [SingletonClass.cpp] - (272 bytes)

/* Dave Pallot */

#include "singleton.h"

int main(int argc, char* argv[])
{
	// Create a singleton
	Singleton::instance();

	Singleton::instance()->func1();
	Singleton::instance()->func2();

	// Kill the singleton
	Singleton::destroy();

	return 0;
}

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