Archive for category: C++20

TimelineCpp20Interruption

Cooperative Interruption of a Thread in C++20

February 4, 2021

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A typical question in my C++ seminars is: Can a thread be killed? Before C++20, my answer is no. With…

TimelineCpp20

Barriers and Atomic Smart Pointers in C++20

January 29, 2021

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In my last post, I introduced latches in C++20. A latch enables its threads to wait until a counter becomes…

TimelineCpp20

Latches in C++20

January 18, 2021

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Latches and barriers are coordination types that enable some threads to wait until a counter becomes…

TimelineCpp20

Semaphores in C++20

January 14, 2021

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Semaphores are a synchronization mechanism used to control concurrent access to a shared resource. They…

TimelineCpp20CoreLanguage

Performance Comparison of Condition Variables and Atomics in C++20

December 19, 2020

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After the introduction to std::atomic_flag in my last post, Synchronization with Atomics in C++20, I…

TimelineCpp20CoreLanguage

Synchronization with Atomics in C++20

December 12, 2020

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Sender/receiver workflows are pretty common for threads. In such a workflow, the receiver is waiting…

TimelineCpp20CoreLanguage

Atomic References with C++20

December 8, 2020

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Atomics receives a few essential extensions in C++20. Today, I start with the new data type std::atomic_ref. The…

TimelineCpp20CoreLanguage2

Bit Manipulation with C++20

December 3, 2020

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This post concludes my presentation of library features in C++20. Today I am writing about the class…

TimelineCpp20CoreLanguage

Feature Testing with C++20

November 27, 2020

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When your program's compilation broke with a brand-new C++20 feature, you often end with a few questions:…

TimelineCpp20CoreLanguage

Safe Comparisons of Integrals with C++20

November 17, 2020

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When you compare signed and unsigned integers, you may not get the result you expect. Thanks to…

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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 […]
C++26 Core Language: Small ImprovementsNovember 4, 2024 - 8:34 am
There are more small improvements in the C++26 language, which you should know. static_assert extension First, here’s the syntax of static_assert in C++11: static_assert(compile time predicate, unevaluated string) With C++26, the string can be a user-defined type having the following properties: static_assert can now be used with a format string. Here’s a nice example from […]