Mar 13-15, Bochum, Germany
Mar 25-28, Bristol, UK
Apr, 16th, Madrid, Spain
Jun, 7-10, Folkstone, UK
Jun 22-23, Paris, France
By DaPi | Jan 18, 2020 01:48 PM | Tags: basics
Understanding the basics of the language in every detail.
Objects, their lifetimes and pointers
by Dawid Pilarski
From the article:
A detailed tour on C++ objects, what they are and how to avoid common undefined behaviors.
By Adrien Hamelin | Jan 9, 2020 01:09 PM | Tags: community c++17
Making the code more expressive!
Dry-comparisons: A C++ Library to Shorten Redundant If Statements
by Jonathan Boccara
From the article:
Have you ever felt that the code you write in if statements doesn’t look as natural as the specification expresses them?
By Adrien Hamelin | Jan 9, 2020 01:07 PM | Tags: experimental
The series continue.
C++ coroutines: The problem of the DispatcherQueue task that runs too soon, part 4
by Raymond Chen
From the article:
Last time, we made another attempt to fix a race condition in C++/WinRT’s resume_foreground(DispatcherQueue) function when it tries to resume execution on a dispatcher queue. We did this by having the queued task wait until await_suspend was finished before allowing the coroutine to resume, and we found a nice place to put the synchronization object, namely in the awaiter, but even with that fix, we introduced additional memory barriers into the hot code path.
But it turns out all this work was unnecessary. We just had to look at the problem a different way.
The purpose of storing the result of TryEnqueue into m_queued is so that await_resume can report whether the lambda was queued or not. But we can infer that information another way: The fact that our lambda is running means that got got queued. Because if the lambda were not queued, then it would never have run in the first place...
By Adrien Hamelin | Jan 9, 2020 01:04 PM | Tags: experimental
The series contine.
C++ coroutines: The problem of the DispatcherQueue task that runs too soon, part 3
by Raymond Chen
From the article:
Last time, we fixed a race condition in C++/WinRT’s resume_foreground(DispatcherQueue) function when it tries to resume execution on a dispatcher queue. We did this by having the queued task wait until await_suspend was finished before allowing the coroutine to resume. The hard part was finding a place to put the synchronization object, and we ended up putting it in the queued task’s lambda...
By Meeting C++ | Jan 8, 2020 08:31 AM | Tags: meetingcpp community
Take the Meeting C++ Community Survey!
Launching the Meeting C++ Community Survey
by Jens Weller
From the article:
One thing then often has bugged me when looking at the C++ community is that we don't really had good numbers on most things. Jetbrains, ISOCPP and Bartek's coding blog have launched surveys in the last years, which changed this a little. Also I've been doing some surveys on Twitter, giving some limited insight into C++ related topics. But Twitter surveys are very limited, and for a long time I had an idea on how to make this a continuous survey.
By Meeting C++ | Jan 8, 2020 02:40 AM | Tags: meetingcpp community basics
The monthly overview on upcoming C++ User Group meetings all over the world!
C++ User Group meetings in January 2020
by Jens Weller
From the article:
Happy new years! The year has begun, and lots of C++ User Groups have their first meeting of 2020.
Would like to start your own group or looking for ideas in running your current group? Watch my talk from CppCon:
CppCon YT - CppCon 2019: Jens Weller “Starting and Running C++ User Groups”
By Adrien Hamelin | Jan 7, 2020 12:42 PM | Tags: experimental
The series continue.
C++ coroutines: The problem of the DispatcherQueue task that runs too soon, part 2
by Raymond Chen
From the article:
Last time, we discovered a race condition in C++/WinRT’s resume_foreground(DispatcherQueue) function when it tries to resume execution on a dispatcher queue. Let’s try to fix it...
By Adrien Hamelin | Jan 7, 2020 12:40 PM | Tags: experimental
The series continue.
C++ coroutines: The problem of the synchronous apartment-changing callback
by Raymond Chen
From the article:
Today is a puzzle you can you can try to solve with the information you’ve learned about C++ coroutines and C++/WinRT...
By Adrien Hamelin | Jan 7, 2020 12:38 PM | Tags: experimental
Can't get everything.
C++20: Concepts - What we don't get
by Rainer Grimm
From the article:
The Template Introduction from the Concepts TS is a new way to use concepts. This syntactic variant is not included in the Concepts Draft and, therefore, in the C++20 standard. But, I don't know what the farther away future brings.
By Christoph Cullmann | Jan 5, 2020 12:32 AM | Tags: None
Libraries compiled with different C++ standard versions might not be as compatible as wanted.
C++ Standard Version Mix-up
by Christoph Cullmann
From the article:
We work with MSVC 2019 on Windows and all worked fine with LLVM 9.x, but with master, close to all my tests did now segfault in aligned_free.
Some months ago, the implementation of DenseMap got improved to use the allocate_buffer/deallocate_buffer functions to use (if possible) aligned allocation.
Unfortunately, this means, during the compilation of the library, the checks there ensure it doesn’t use these code paths, on the other side, during compilation of our tools, it does, as the allocation functions are fully inline in the header including the feature checks.