Singleton Object Management

November 7, 2005 Singleton Object Management Dr. Partha Pratim Das Interra Systems (India) Pvt. Ltd. Resource Management Series

Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

atexit() Callback Behavior – Execute code after main() ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

atexit() Callback Behavior ,[object Object],[object Object],[object Object],[object Object]

Object Lifetime ,[object Object],[object Object],[object Object],[object Object],[object Object]

Object Lifetime ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Object Lifetime ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Object Lifetime ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Static Object Lifetime An Example

Singleton Objects What and Why

What is a Singleton Class? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Lifetime Semantics for a Singleton ,[object Object],[object Object],[object Object],[object Object],[object Object]

Singleton Examples ,[object Object],[object Object],[object Object],[object Object],[object Object]

Singleton Examples ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Static Data + Static Function != Singleton ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Essence of Singleton Implementation ,[object Object],[object Object],[object Object],[object Object]

A Simple Singleton ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Meyer’s Singleton – A Solution ,[object Object],[object Object],[object Object],Singleton& Singleton::Instance() { static Singleton theInstance; return theInstance; }

The Dead Reference Problem ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The Dead Reference Scenario ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The Dead Reference Detection ,[object Object],[object Object],[object Object]

Meyer’s Singleton with Dead Reference Detection

Phoenix Singleton ,[object Object],[object Object],[object Object],[object Object],[object Object]

More Singletons … ,[object Object],[object Object],[object Object],[object Object]

Singletons in C++ References & Credits

References: Books ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

References: Papers ,[object Object]

Credits / Acknowledgements ,[object Object],[object Object],[object Object]

Singleton Object Management

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Singleton Object Management