RWTSingleton<T>

Base Class

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• Header File
• Description
• Example
• Protected Constructor
• Static Public Member Function
• Static Protected Member Function

Member Functions

get()

instance()

Smart Pointer

#include <rw/pointer/RWTSingleton.h>

Ensures that a class has only one instance, and provides a global point of access to it. This is an Object Creational pattern. For more information, see Design Patterns, by Gamma, Helm, Johnson, and Vlissides.

#include <rw/pointer/RWTSingleton.h>
#include <iostream.h>

class Foo {
  public: 
    function(){cout << "I'm a foo example" << endl;};
};

RWTCountingPointer<Foo> singleFooPtr = RWTSingleton<Foo>::instance();
int main(void)
{
    singleFooPtr->function();
    return 0;
}

RWTSingleton(void);

The constructor is protected to ensure that only one instance can ever get created.

static RWTCountingPointer<T, RWSafeCounter>& 
instance(void);

Creates and returns the instance of T, if it has not already been created.

static RWTCountingPointer<T, RWSafeCounter> & 
get(void);

Protected acessor function that gives access to the class state. Inherited classes use this function.

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