Blog

Table of Content

March 22, 2023

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This page is the starting point for my blog Modernes C++. A simple overview of my existing posts. This…

The Time Library

March 22, 2023

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A blog dealing with multithreading in modern C++ but not writing about the new time library is incomplete.…

Multithreading with C++17 and C++20

March 22, 2023

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Forecasts about the future are difficult. In particular, when they are about C++20. Nevertheless, I…

Multithreading in Modern C++

March 22, 2023

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With the new C++11 Standard, C++ faces the first time challenges of multicore architectures. The…

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Printed Version of “The C++ Standard Library” on Amazon

March 21, 2023

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I have two great news. First, you have my "The C++ Standard Library" on Amazon; second, the book…

Layers

Architectural Patterns

March 19, 2023

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Architectural patterns describe the fundamental structure of a software system and are often based on…

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Presentation next Monday: Concurrency Patterns with Rainer Grimm

March 15, 2023

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Next Monday, I will give two presentations for Meeting C++. First, I will introduce my mentoring…

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The Lack of Training Culture: You unlearned Learning

March 12, 2023

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Our software industry has a significant Lack of Training Culture. In my last articles, I wrote "Learning…

QualitätsmerkmaleFokusWartbarkeit EN

How can you recognise a good software architecture?

March 6, 2023

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I'm happy to present today a guest post from Alexander Eisenhuth. Alexander will write about his passion:…

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Idioms for Polymorphism and Templates

March 5, 2023

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This post is unique because I have written about all the topics mentioned in this post already. Therefore,…

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The C++ Standard Library: The Fourth Edition includes C++23

March 5, 2023

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I'm happy to announce. I updated my "The C++ Standard Library" book to C++23. Many…

ClassIdioms

Covariant Return Type

February 26, 2023

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The Covariant Return Type of a member function allows an overriding member function to return a narrower…

Latest news

Data-Parallel Types: simd_maskJuly 14, 2025 - 9:16 am
Thanks to simd_mask, conditional execution of operations on data-parallel types is possible. Unfortunately, in my last article, Data-Parallel Types – A First Example, I forgot to introduce one of the new library functions. I will make up for that in this article. Where Expression The new keyword where creates a so-called where expression. This allows […]
Data-Parallel Types – A First ExampleJune 25, 2025 - 4:01 pm
After providing a theoretical introduction to the new C++ 26 feature in my last article, “Data-Parallel Types (SIMD),” I would like to follow up today with a practical example. The following introductory example is from the experimental implementation of the SIMD library. This functionality has been fully adopted in the C++ 26 draft under the […]
Data-Parallel Types (SIMD)June 16, 2025 - 10:24 am
The data-parallel types (SIMD) library provides data-parallel types and operations on them. Today, I want to take a closer look at this. Before diving into the new library, I would like to take a moment to discuss SIMD. SIMD Vectorization refers to the SIMD (Single Instruction, Multiple Data) extensions of a modern processor’s instruction set. […]
Read-copy-update (RCU)June 2, 2025 - 9:54 am
Read-copy-update is strong in multithreading environments where a data structure is read almost exclusively but rarely written. First of all, what is RCU? The excellent Wikipedia page on Read-copy-update provides a good introduction: In computer science, read-copy-update (RCU) is a synchronization mechanism that avoids the use of lock primitives while multiple threads concurrently read and […]
atomic<shared_ptr<>> by Oliver SchädlichMay 19, 2025 - 9:11 am
This blog article is an experiment. A few days ago, I received the following email (translated from German) from Oliver Schädlich (oliver.schaedlich@gmail.com). If, as I hope, this article sparks a discussion, I will be happy to summarize it in my last article. Please send an email to: Rainer.Grimm@ModernesCpp.de. I just read your latest article on […]
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 […]