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Mastering the C++17 STL

You're reading from   Mastering the C++17 STL Make full use of the standard library components in C++17

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Product type Paperback
Published in Sep 2017
Publisher Packt
ISBN-13 9781787126824
Length 384 pages
Edition 1st Edition
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Arthur O'Dwyer Arthur O'Dwyer
Author Profile Icon Arthur O'Dwyer
Arthur O'Dwyer
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Table of Contents (13) Chapters Close

Preface 1. Classical Polymorphism and Generic Programming 2. Iterators and Ranges FREE CHAPTER 3. The Iterator-Pair Algorithms 4. The Container Zoo 5. Vocabulary Types 6. Smart Pointers 7. Concurrency 8. Allocators 9. Iostreams 10. Regular Expressions 11. Random Numbers 12. Filesystem

Reference counting with std::shared_ptr<T>

Having completely solved the problem of memory leaks, we now tackle the problem of use-after-free bugs. The essential problem to be solved here is unclear ownership--or rather shared ownership--of a given resource or chunk of memory. This chunk of memory might have several people looking at it at different times, maybe from different data structures or from different threads, and we want to make sure that all these stakeholders are involved in the decision about when to free it. The ownership of the underlying chunk of memory should be shared.

For this, the standard has provided std::shared_ptr<T>. Its interface appears very similar to std::unique_ptr<T>; all of the differences are hidden under the hood, in the implementations of the special member functions.

std::shared_ptr<T> provides an approach to memory management...

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