Archive for category: Blog

facts

Facts

October 3, 2016

/

After the myths, the facts will follow. Therefore, we leave the area of half-truth and untruth statements…

lagerfeuer

Myths

October 2, 2016

/

As I started working in the embedded environment I was astonished that there was so much prejudice against…

BjarneStroustrup

Requirements of Embedded Programming

September 28, 2016

/

Bjarne Stroustrup's FAQ makes it crystal clear. One of the design goals for C++11 was to make C++ even…

untilAndForEng

Sleep and Wait

September 26, 2016

/

The new time library is an important component of the threading interface. As well, as threads, locks,…

clockProperties

The Three Clocks

September 22, 2016

/

A clock consists of a starting point and a time tick. C++ offers with std::chrono::system_clock, std::chrono::steady_clock,…

timeSinceEpoch

Time Duration

September 20, 2016

/

Time duration is the difference between two time points. It will be measured in time ticks. Time…

timepoint

Time Point

September 17, 2016

/

The starting point (epoch) and the additional time duration define the time point. It consists of two…

ZeitPunktDauerGeberEng

The Time Library

September 14, 2016

/

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

SingleThreadedAdditionEng

My Conclusion: Summation of a Vector in three Variants

September 11, 2016

/

After I've calculated in three different ways the sum of a std::vector I want to draw my conclusions. The…

localVariable

Multithreaded: Summation with Minimal Synchronization

September 7, 2016

/

Until now, I've used two strategies to summate a std::vector. First, I did the whole math in one thread…

Latest news

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 […]