Latches And Barriers

Latches and barriers are simple thread synchronisation mechanism which enables it that some threads wait until a counter becomes zero. We will presumably get in C++20 latches and barriers in three variations: std::latch, std::barrier, and std::flex_barrier.

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Tags: C++20
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std::future Extensions

Tasks in the form of promises and futures have in C++11 an ambivalent reputation. At on hand, they are a lot easier to use than threads or condition variables; at the other hand, they have a great deficiency. They can not composed. C++20 will overcome this deficiency.

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Tags: C++20, tasks
Comments 1Views: 4232

And the Winners are

Mads Ravn, Antonis Polykratis, Martin Mancuska, David Farago, Edgar Rojas, and Adrian Javaloy.

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Atomic Smart Pointers

C++20 will have atomic smart pointers. To be exactly, we will get a std::atomic_shared_ptr and a std::atomic_weak_ptr. But why? std::shared_ptr and std::weak_ptr are already thread-safe. Sort of. Let me dive into the details.

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Tags: C++20
Comments 5Views: 10184

Parallel Algorithm of the Standard Template Library

The idea is quite simple. The Standard Template has more than 100 algorithms for searching, counting, and manipulation of ranges and their elements. With C++17, 69 of them are overloaded and a few new are added. The overloaded and new algorithm can be invoked with a so-called execution policy. By using the execution policy, you can specify whether the algorithm should run sequential, parallel, or parallel and vectorized.

 

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Tags: C++17
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Multithreading with C++17 and C++20

Forecasts about the future are difficult. In particular, when they are about C++20. Nevertheless, I will take a look into the crystal ball and will write in the next posts about, what we will get with C++17  and we can hope for with C++20.

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Tags: C++20, C++17
Comments 3Views: 19741

Expression Templates

Expression templates are "structures representing a computation at compile time, which structures are evaluated only as needed to produce efficient code for the entire computation" (https://en.wikipedia.org/wiki/Expression_templates). As needed, now we are in the centre of lazy evaluation and in the centre of this post.

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