Archive for category: C++ Core Guidelines

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C++ Core Guidelines: Rules about Performance

March 23, 2018

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Before I write about the rules of performance, I will do a straightforward job. Accessing the elements…

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C++ Core Guidelines: Rules about Statements and Arithmetic

March 16, 2018

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Today, I will write about the remaining rules to statements and the arithmetic rules. If you don't follow…

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C++ Core Guidelines: More about Control Structures

March 9, 2018

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My last German post C++ Core Guidelines: To Switch or not to Switch, that is the Question got…

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C++ Core Guidelines: To Switch or not to Switch, that is the Question

March 3, 2018

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First, I have to apologize. Today, I wanted to continue my journey through the C++ Core Guidelines with…

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C++ Core Guidelines: Rules for Statements

February 23, 2018

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Before I continue with the roughly 15 rules for statements, let me finish the two rules for expressions.…

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C++ Core Guidelines: Rules about Don’ts

February 16, 2018

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This post is about don'ts. Here are this post's two most important rules: Don't use std::move thoughtless…

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C++ Core Guidelines: Rules for Conversions and Casts

February 9, 2018

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What has narrowing conversion and casts in common? They are often the source of errors; therefore, I…

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C++ Core Guidelines: More Rules for Expressions

February 3, 2018

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I know this post's headline is a bit boring: More Rules for Expressions. Honestly, this post is about…

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C++ Core Guidelines: Rules for Expressions

January 27, 2018

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Today's post is about expressions. You should avoid complicated expressions, know the precedence rules…

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C++ Core Guidelines: More Rules for Declarations

January 20, 2018

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In this post, I will finish the rules for declarations. The remaining rules for declarations are not…

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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 […]