C++ Singleton Pattern - when you only want one instance of a class to exist. Just typed, not checked. But it should show enough of the pattern to make it understandable.
1 //header file
2 class someclass
3 {
4 public:
5 someclass* Get()
6 {
7 if (TheInstance)
8 return TheInstance;
9 else
10 return new someclass();
11 }
12 ~someclass()
13 {
14 if (TheInstance == this)
15 TheInstance = NULL;
16 }
17 private:
18 someclass() { TheInstance = this;}
19
20 static someclass* TheInstance;
21 };
22 //source file
23 someclass* someclass::TheInstance = NULL;
24 //put in here or linker will hate us
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