Archive for month: December, 2016

myNew

Overloading Operator new and delete 1

December 30, 2016

/

It happens quite too often that a C++ application allocates memory but doesn't deallocate it. This is…

Explicit Memory Management

December 29, 2016

/

Explicit memory management has in C++ a high complexity but also provides great functionality. Sadly,…

raii

Garbage Collection – No Thanks

December 26, 2016

/

C++ is old-fashioned. C++ has no garbage collection. No garbage collection? Right! Old fashioned? Wrong! What…

perfectForwarding1

Perfect Forwarding

December 24, 2016

/

Today, we solve " ... a herefore unsolved problem in C++" (Bjarne Stroustrup). To make the long story…

RainerGrimmSmall

Time for Wishes

December 24, 2016

/

I wrote more than 130 posts in my German blog about functional programming, embedded programming and…

moveAlgorithm

Move Semantis: Two Nice Properties

December 22, 2016

/

I will talk about two nice properties of the move semantic in this post that is not so often mentioned.…

copy

Copy versus Move Semantics: A few Numbers

December 20, 2016

/

A lot was written about the advantages of move semantics to copy semantics. Instead of an expensive copy…

sizeof

std::array – Dynamic Memory, no Thanks

December 18, 2016

/

std::array combines the best of two worlds. On the one hand, std::array has the size and efficiency of…

stringAndVector

Automatic Memory Management of the STL Containers

December 16, 2016

/

One of the significant advantages of a C++ string to a C string and of a std::vector to a C array is…

weakPtr

std::weak_ptr

December 14, 2016

/

std::unique_ptr models the concept of exclusive ownership, std::shared_ptr the concept of shared ownership.…

Latest news

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 […]