Archive for category: C++20

Feature Testing Macros

August 5, 2024

The feature testing macros is a relatively unknown feature in C + + 20. They give you the definitive…

Cooperative Interruption of a Thread in C++20: Callbacks

July 15, 2024

I introduced in my last post "Cooperative Interruption of a Thread in C++20" callbacks. Today, I dive…

TimelineCpp20Interruption

Cooperative Interruption of a Thread in C++20

July 1, 2024

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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…

Chrono: Input

June 24, 2024

You can also apply the format specifier for formatted input. This post is the eleventh in my…

Chrono I/O: Unformatted and Formatted

June 17, 2024

Chrono I/O consists of reading and writing chrono types. The various chrono types support unformatted…

Chrono I/O

May 20, 2024

Chrono I/O consists of reading and writing chrono types. The various chrono types support unformatted…

Time Zones: Online Classes

May 13, 2024

Today, I will continue to present the functionality of the time zones of the C++20 chrono extension. This…

TimelineCpp20CoreLanguage

Time Zones: Details

May 6, 2024

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Today, I present the time-zones functionality of the C++20 extension. This post is the seventh…

C++20: Query Calendar Dates and Ordinal Dates

April 22, 2024

The extended chrono library makes it relatively easy to ask for the time duration between calendar dates. This…

C++20: Displaying and Checking Calendar Dates

April 15, 2024

I created calendar dates in my last post, "C++20: Creating Calendar Dates," and I will display and check…

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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 […]
std::format ExtensionJanuary 20, 2025 - 11:55 am
Displaying the address of an arbitrary pointer in C++ 20 fails but succeeds with C++26. C++20 Only void, const void, and std::nullptr_t pointer types are valid. If you want to display the address of an arbitrary pointer, you must cast it to (const) void*. // formatPointer20.cpp #include <format> #include <iostream> #include <string> int main() { […]