Blog

ZeitPunktDauerGeberEng

The Time Library

September 14, 2016

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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

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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

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

synchronizeWithLock

Multithreaded: Summation of a Vector

September 5, 2016

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My goal is to sum up all elements of a vector. I used in the last post a single thread. In this post,…

CalculateWithLoop

Single Threaded: Summation of a Vector

September 3, 2016

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What is the fastest way to add the elements of a std::vector? This a question that I will pursue in the…

gcc

Thread-Safe Initialization of a Singleton

August 23, 2016

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There are a lot of issues with the singleton pattern. I'm aware of that. But the singleton pattern is…

sukzessiveOptimierungRelaxedSemantikEng

Ongoing Optimization: Relaxed Semantics with CppMem

August 20, 2016

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With the relaxed semantics, we have no synchronizations and ordering constraints on atomic operations. Relaxed…

undefinedEng

Ongoing Optimization: A Data Race with CppMem

August 18, 2016

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But we can improve and further improve the acquire-release semantics of the last post. Why should x be…

sukzessiveOptimierungSequenzielleKonsistenzEng

Ongoing Optimization: Acquire-Release Semantics with CppMem

August 16, 2016

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With the acquire-release semantics, we break the sequential consistency. In the acquire-release semantics,…

sukzessiveOptimierungSequenzielleKonsistenzEng

Ongoing Optimization: Sequential Consistency with CppMem

August 13, 2016

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With atomic data types, you can tailor your program to your needs and optimize it. But now we are in…

sukzessiveOptimierungLocksEng

Ongoing Optimization: Locks and Volatile with CppMem

August 9, 2016

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The easiest way to solve the undefined behaviour in the post Ongoing Optimization: Unsynchronized access…

KurzUndGutStandardbibliothek

Looking for Proofreaders for my New C++ Book

August 4, 2016

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Something completely different. I'm looking for English proofreaders for my new book. O'Reilly gave…

Latest news

std::execution: More SendersDecember 23, 2024 - 10:40 am
std::execution offers three types of senders: factories, adapters, and consumers. I’ll take a closer look at these today. Most of the following content is from proposal P2300R10. I will try to represent it more concisely. Sender Factory A sender factory is an algorithm that takes no senders as parameters and returns a sender. I already […]
std::execution: SenderDecember 16, 2024 - 11:25 am
std::execution offers three types of senders: factories, adapters, and consumers. I’ll take a closer look at these today. Most of the following content is from proposal P2300R10. I will try to represent it more concisely. Sender Factory A sender factory is an algorithm that takes no senders as parameters and returns a sender. execution::schedule execution::sender […]
std::execution: Composition of SendersDecember 9, 2024 - 10:25 am
Most sender adaptors are composable using the pipe operator. Let me start with a simple example of composition with the pipe operator. Instead of the nested function calls call1(call2(input)) you can write call1 | call2(input) or even: input | call1 | call2 Function composition Okay, this example was straightforward. Let’s do something more complicated. Proposal […]
std::execution: Inclusive ScanDecember 2, 2024 - 10:30 am
Inclusive scan solves problems related to range queries, such as calculating the sum of a range of elements in an array. It is also used in range minimum queries and various other algorithms. Before I present the asynchronous inclusive scan, I introduce the inclusive scan, aka prefix sum. Prefix Sum In computer science, the prefix […]
std::execution: Asynchronous AlgorithmsNovember 25, 2024 - 9:06 am
std::execution supports many asynchronous algorithms for various workflows. Presenting proposal P2300R10 is not easy. First, it is very powerful, and second, it is very long. Therefore, I concentrate on specific aspects of the proposal. What are the priorities of this proposal? Priorities The terms execution resource, execution agent, and scheduler are essential for the understanding […]
std::executionNovember 18, 2024 - 9:03 am
std::execution, previously known as executors or Senders/Receivers, provides “a Standard C++ framework for managing asynchronous execution on generic execution resources“. (P2300R10) Side Note Change of plans. My original plan was to present the C++26 library after the core language. However, the implementation status of the library is not good enough. Therefore, I decided to continue […]