Archive for category: C++ Core Guidelines

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C++ Core Guidelines: Rules for Templates and Generic Programming

August 31, 2018

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I this post I give an introduction to the rules for generic programming in C++. Generic programming is,…

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C++ Core Guidelines: Rules for Constants and Immutability

August 22, 2018

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Making objects or methods const has two benefits. First, the compiler will complain when you break the…

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C++ Core Gudelines: goto considered Evil

August 17, 2018

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If you can't throw an exception and can't use final_action (finally) from the guideline support library,…

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C++ Core Guidelines: finally in C++

August 10, 2018

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To make my point clear, this post is about the exceptional case that you can not throw an exception.…

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C++ Core Guidelines: Rules about Exception Handling

August 1, 2018

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Today's post is about the right way to throw and catch exceptions. This means when you should throw and…

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C++ Core Guidelines: The noexcept Specifier and Operator

July 24, 2018

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If you skim the remaining rules to error handling, you often read the word noexcept. Before I write…

Design by contract

C++ Core Guidelines: A Short Detour to Contracts in C++20

July 20, 2018

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My original plan was it to write in this post about the next rules to error handling. But I changed my…

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C++ Core Guidelines: Rules for Error Handling

July 12, 2018

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Error handling is an essential part of writing good software; therefore, the C++ core guidelines have…

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C++ Core Guidelines: The Remaining Rules about Lock-Free Programming

July 6, 2018

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Today, I will finish my story on concurrency and lock-free programming. There are four rules to lock-free…

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C++ Core Guidelines: The Resolution of the Riddle

June 27, 2018

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Today, I will solve the riddle from my last post. Thanks to my readers, the analysis of the ABA problem…

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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 […]
A Lock-Free Stack: A Complete ImplementationFebruary 10, 2025 - 3:01 pm
My last lock-free stack implementation was incomplete. It only supported push operations. Let’s change this. The following paragraph about sequential consistency is optional. You can easily ignore it. Sequential Consistency In my examples, I use the default memory ordering: sequential consistency. The reason is simple. Sequential consistency provides the strongest guarantees of all memory ordering […]
My Next Mentoring Program: “Generic Programming (Templates) with C++” startsFebruary 4, 2025 - 4:51 pm
My next mentoring program, “Embedded Programming with Modern C++,” starts on January 31st. Registration is open. Here are more details. Embedded Programming with Modern C++ The mentoring program consists of 16 stations. You have to invest at least 3 hours per week for each one. This means the program takes four months, and you can […]
A Lock-Free Stack: A Simplified ImplementationFebruary 3, 2025 - 10:37 am
Today, I continue my mini story about lock-free data structures. General Considerations From the outside, the caller’s responsibility (application) is to protect the data. From inside, the data structure is responsible for protecting itself. A data structure that protects itself so a data race cannot appear is called thread-safe. First, what general considerations must you […]
Deferred Reclamation in C++26: Read-Copy Update and Hazard PointersJanuary 27, 2025 - 12:23 pm
Before I dive into lock-free programming, there’s a little bit of theory necessary. A common problem in concurrency is the so-called ABA problem. That means you read a variable twice, which returns the same value each time, A. Therefore, you conclude that nothing changed in between. But you forgot the B. Let me first use […]