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C++ Core Guidelines: Rules for Strings

June 13, 2019

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The C++ core guidelines use the term string as a sequence of characters. Consequently, the guidelines…

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C++ Core Guidelines: Avoid Bounds Errors

June 5, 2019

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When you access an element outside a container of the STL, the result is not so promising. Your effect…

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More special Friends with std::map and std::unordered_map

May 29, 2019

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Modern C++ has eight associative containers, but your special friends should be std::map and std::unordered_map.…

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C++ Core Guidelines: std::array and std::vector are your Friends

May 24, 2019

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In 99 % of your use cases for a sequential container, you are outstanding with a std::array or a std::vector.…

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C++ Core Guidelines: The Standard Library

May 16, 2019

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The rules to the C++ standard library are mainly about containers, strings, and iostreams. Curiously,…

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More Details to Modules

May 5, 2019

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My last post gave you an introduction to modules in C++20. This post shows how to use existing…

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Modules

April 29, 2019

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Modules are one of the five prominent features of C++20. Modules will overcome the restrictions of header…

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C++ Core Guidelines: The Remaining Rules about Source Files

April 25, 2019

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Today, I complet the rules of the C++ core guidelines to source files. They are about header files and…

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The new pdf bundle is available: C++ Core Guidlines – Templates and Generic Programming

April 18, 2019

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I have prepared the pdf bundle. To get it is quite simple. If you subscribe to the newsletter, you…

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C++ Core Guidelines: Source Files

April 16, 2019

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The organization of source files is a topic quite seldom addressed in C++. With C++20, we will get modules,…

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C++ Insights – Lambdas

April 11, 2019

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Honestly, many programmers in my classes have issues with the syntactic sugar of lambdas. Desugaring…

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C++ Insights – Variadic Templates

April 4, 2019

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Variadic templates are a C++ feature that looks quite magic the first time you see them. Thanks to C++…

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Hazard Pointers in C++26May 5, 2025 - 11:12 am
Hazard pointers provide garbage collection in C++ and solve the ABA problem. First of all. What is a hazard pointer? Proposal P2530R3 gives a nice explanation: A hazard pointer is a single-writer multi-reader pointer that can be owned by at most one thread at any time. Only the owner of the hazard pointer can set […]
A Lock-Free Stack: A Hazard Pointer Implementation Explained IIApril 7, 2025 - 11:11 am
In my last post, I started to explain a hazard pointer implementation: A Lock-Free Stack: A Hazard Pointer Implementation Explained I. Today, I will continue to explain the implementation. The Retire List The retire list has the public member functions isInUse, addNode, and deleteUnusedNodes. Additionally, it has the inner class RetireNode, an atomic member of […]
A Lock-Free Stack: A Hazard Pointer Implementation Explained IMarch 24, 2025 - 11:37 am
In my last post, I presented a hazard pointer implementation: A Lock-Free Stack: A Hazard Pointer Implementation. Today, I will explain the implementation. MyNode is a class template, parametrized by the type it holds: data. MyNode models the concept Node. template <typename T> concept Node = requires(T a) { {T::data}; { *a.next } -> std::same_as<T&>; […]
A Lock-Free Stack: A Hazard Pointer ImplementationMarch 10, 2025 - 11:42 am
Hazard Pointers solve all issues of the previous implementation: A Lock-Free Stack: A Simple Garbage Collector. From one Week to two Weeks You may have already noticed. I will change my blog publishing frequency from one to two weeks in the future. Writing a post using your voice is exceptionally exhausting and time-consuming. Hazard Pointers […]
A Lock-Free Stack: A Simple Garbage CollectorFebruary 24, 2025 - 11:58 am
My next lock-free stack includes a simple garbage collector. I discussed the concurrent execution of more than one topAndPush call is a Race Condition. I can safely delete a node if not more than one topAndPush call is executing concurrently. This observation is crucial for solving this memory leak issue: I store removed nodes on […]
A Lock-Free Stack: Atomic Smart PointerFebruary 17, 2025 - 11:47 am
The easiest way to solve this memory leak issue from the last post is to use a std::shared_ptr. Atomic Smart Pointer There are two ways to apply atomic operations on a std::shared_ptr: In C++11, you can use the free atomic functions on std::shared_ptr. With C++20, you can use atomic smart pointers. C++11 Using atomic operations […]