llfio
libunifex
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llfio | libunifex | |
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25 | 22 | |
768 | 1,355 | |
- | 3.7% | |
6.3 | 7.8 | |
10 days ago | 11 days ago | |
C++ | C++ | |
GNU General Public License v3.0 or later | GNU General Public License v3.0 or later |
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llfio
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File IO question if something is in stdlib or not
The reference library can be found at https://ned14.github.io/llfio/
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Is there a good cross-platform (Windows / Linux) C or C++ library for file I/O?
Thanks for the suggestions, which I have transposed into https://github.com/ned14/llfio/issues/106
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Should I use platform dependent file IO instead of basic_fstream when performance matters
There was an effort to get an afio library accepted into boost in the past. I believe the most current work on that library is happening here nowadays : https://github.com/ned14/llfio I'm not sure if it is considered production-ready or not. But I couldn't see any mention of it in the replies so I figured I would fix that!
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File Handling in C++
It has an implementation: LLFIO
- Proposed Standard Secure Sockets reference implementation complete
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Getting started with Boost in 2022
I'm a fan of Interprocess, used it for over a decade. But for mmapping I've switched to LLFIO and recommend it highly. (Plugging so Niall doesn't have to.)
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Networking TS: first impression and questions;
Since that post, I have the reference implementation library very nearly passing its test suite https://github.com/ned14/llfio/pull/89. Once it's done I'll start very slowly writing its proposal paper for WG21 SG4. Should land before this summer.
- P2300 (Sender/Receiver) is DEAD in the water for C++23 !!!
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IO library for embedded devices - looking for contributor
FYI it doesn't solve quite what you're solving, but I've been careful to ensure https://github.com/ned14/llfio works well on Freestanding and < 64 Kb microcontrollers and I know Victor has been careful to ensure a good subset of std::format could work well on embedded. In other words, the i/o story for embedded C++ may improve greatly in the next few years.
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Weird fstream behavior after MSVC upgrade
If you want stronger guarantees than iostreams can give you, either use the OS-specific calls or a wrapper of said calls (e.g. https://github.com/ned14/llfio, disclaimer I'm the owner of that). Note that even in LLFIO, there is no concept of "seek to the end" because that's racy so we don't implement that. All you get is atomic append, otherwise you're on your own to coordinate what "end of file" means.
libunifex
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Comparing asio to unifex
I'm curious what led you to this conclusion. If you ran into scalability issues with its static_thread_pool, then that's a known issue. If it's something else, the authors (of which I'm one) would love to know.
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How does one actually build a C++ project
Instead of calling add_executable you will call add_library. Here is a (only moderately complicated) production example of a library that can be built standalone (along with tests and example executables), or as a subproject, where it builds only the library
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How to write networking code now that will be easiest to adapt to the upcoming standard?
My original thought was to build my DDS implementation on top of libunifex in anticipation for standardization: https://github.com/facebookexperimental/libunifex
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Executors/libunifex example project
I'm trying to understand how to work with the proposed executors in a project, but after watching Eric Niebler's cppcon talks (https://youtu.be/xLboNIf7BTg) and looking at the libunifex examples (https://github.com/facebookexperimental/libunifex/tree/main/examples) I still have a hard time wrapping my head around how to employ the sender/receiver pattern in a larger project.
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Async/Await pattern in C++
You have coroutines in C++20 but there is also the executives proposal that's making it's way into C++23 that is available as a library under the name unifex that only requires C++14
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Using Asio for asynchronous gRPC clients and servers
Asio-grpc makes exactly that possible by providing an Asio execution_context compatible interface to the CompletionQueue. It supports all types of RPCs (including generic ones), completion tokens, cancellation, as well as libunifex sender/receiver (if you want to try out what might become std::execution). The latest release (v1.7.0) also introduced a GrpcStream class for writing Rust/Golang select-style code.
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My thoughts and dreams about a standard user-space I/O scheduler
P2300: they are trying to standardize facebookexperimental/libunifex
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"C++ makes it harder to shoot yourself, but when you do it blows your whole leg off"
All the network handling for Instagram and all other Meta apps on all platforms is handled by their own C++ library https://github.com/facebookexperimental/libunifex.
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State of the art for CPOs (customization points) in C++?
This. I'd also like to mention libunifex. It's entirely based on tag_invoke and is a testament as to how much power it actually provides. On the other hand, it also proves how cumbersome it is to define CPOs with tag_invoke. But IMO it's a lot better than anything else anyone has ever created, and users usually don't need to define new CPOs, only library writers do, so there's that.
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Why do we need networking, executors, linear algebra, etc in the Standard Library?
A work in progress implementation of the library: https://github.com/facebookexperimental/libunifex
What are some alternatives?
mio - Cross-platform C++11 header-only library for memory mapped file IO
cppcoro - A library of C++ coroutine abstractions for the coroutines TS
mold - Mold: A Modern Linker ðŸ¦
concurrencpp - Modern concurrency for C++. Tasks, executors, timers and C++20 coroutines to rule them all
countwords - Playing with counting word frequencies (and performance) in various languages.
Taskflow - A General-purpose Parallel and Heterogeneous Task Programming System
parallel-hashmap - A family of header-only, very fast and memory-friendly hashmap and btree containers.
Restbed - Corvusoft's Restbed framework brings asynchronous RESTful functionality to C++14 applications.
corrade - C++11 multiplatform utility library
robin-hood-hashing - Fast & memory efficient hashtable based on robin hood hashing for C++11/14/17/20
Boost.Beast - HTTP and WebSocket built on Boost.Asio in C++11