Tag Archives: development

tcpproxy 0.4 released

Posted on by Mahmoud Al-Qudsi
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Image courtesy of Hack A Day

This blog post was a bit delayed in the pipeline, but a new release of tcproxy, our educational async (tokio) rust command line proxy project, is now available for download (precompiled binaries or install via cargo).

I was actually surprised to find that we haven’t written about tcpproxy before (you can see our other rust-related posts here), but it’s a command line tcp proxy “server” written with two purposes in mind: a) serving as a real-world example of an async (tokio-based) rust networking project, and b) serving as a minimal but-still-useful tcp proxy you can run and use directly from the command line, without needing complex installation or configuration procedures. (You can think of it as being like Minix, but for rust and async networking.)

The tcpproxy project has been around for quite some time, originally published in 2017 before rust’s async support was even stabilized. At the time, it manually chained futures to achieve scalability without relying on the thread-per-connection model – but today its codebase is a lot easier to follow and understand thanks to rust’s first-class async/await support.

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AsyncLock 3.0 for .NET 5.0 Released

Posted on by Mahmoud Al-Qudsi
2

An updated version of AsyncLock has just been released on GitHub and Nuget with improved support for reentrancy detection.

AsyncLock is a async/await-native anonymous lock for .NET and .NET Core that allows safely using async/await while holding a lock, for example:

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Faster lookups, insertions, and in-order traversal than a red-black or AVL tree

Posted on by NeoSmart Technologies
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NeoSmart Technologies is pleased to announce the immediate availability of its open source NeoSmart.Collections library/package of specialized containers and collections designed to eke out performance beyond that which is available in typical libraries and frameworks, by purposely optimizing for specific (common!) use cases at the cost of pretty much everything else.

In many regards, the data structures/containers/collections that ship with pretty much any given framework or standard library are a study in compromise. Language and framework developers have no idea what sort of data users will throw at their collections, or in what order. They have no clue whether or not a malicious third party would ultimately be at liberty to insert carefully crafted values into a container, or even what the general ratio of reads to writes would look like. The shipped code must be resilient, fairly performant, free of any obvious pathological cases with catastrophic memory or computation complexities, and above all, dependable.

It isn’t just language and framework developers that are forced to make choices that don’t necessarily align with your own use case. Even when attempting to identify what alternative data structure you could write up and use for your needs, you’ll often be presented with theoretical 𝒪 numbers that don’t necessarily apply or even have any relevance at all in the real world. An algorithm thrown out the window for having a horrible 𝒪 in Algorithms and Data Structures 101 may very well be your best friend if you can reasonably confine it to a certain subset of conditions or input values – and that’s without delving into processor instruction pipelines, execution units, spatial and temporal data locality, branch prediction, or SIMD processing.

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PrettySize: a .NET library for printing human-readable file sizes

Posted on by NeoSmart Technologies
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Continuing our promise to open source parts of our libraries and applications where possible, we’ve just released PrettySize, a C# and .NET library for representing file sizes in a human-readable (pretty) format. PrettySize is available for free (MIT-licensed) on GitHub and via NuGet for those that are interested, and forks, contributions, and pull-requests are actively encouraged.1

One of the best benefits of open-sourcing code is that it requires you to take a critical eye to what your code does and how it’s structured. Haphazard code interspersed throughout a dozen different files is cleaned up and re-organized in a way that can only bring benefits all around, from performance to ease-of-use, security, and future maintenance.

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  1. If anyone wants to try their hand at implementing IFormattable, consider this an open invitation. It’s not a functionality we ever needed, but some might find it useful. ↩

Unicode.net: the Unicode (and emoji) library for .NET platforms

Posted on by NeoSmart Technologies
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We are proud to present the latest addition to our open source portfolio, the Unicode.net library! We’ve extracted a number of encoding- and emoji-related namespaces and functions from a few of our projects going back many years and split them off to create Unicode.net: an open source library that can be used to aid in the safe processing and manipulation of (possibly) internationalized strings and non-ASCII characters (and then some).

Unicode.net is designed from the ground-up as a modern approach to text processing and text encoding, with only support for the most popular Unicode encodings: UTF-8, UTF-16, and UTF-32. Additionally, Unicode.net is designed to complement .NET’s existing (albeit extremely limited) Unicode support, instead of supplanting it, which primarily translates to embracing rather than shunning the System.String type wherever possible. Unlike many other text-processing libraries, Unicode.net does not want you to stop using the system types for string representation and to switch over to custom datatypes 😁.

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SecureStore: a .NET secrets manager

Posted on by Mahmoud Al-Qudsi
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SecureStore is our open-source (MIT-licensed) solution to secrets management for .NET developers. It’s intended to be dead simple and boldly embraces the KISS principle. We’ve been using it in production for a while now (years, actually!), but hadn’t gotten around to officially releasing it despite its public availability on our GitHub page.

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WaitForMultipleObjects and WIN32 events for Linux/OS X/*nix and Read-Write Locks for Windows

Posted on by Mahmoud Al-Qudsi
11

As every programmer worth his salt knows, synchronization primitives form the very building blocks of multithreaded programming. Without them, the world as we know it would cease to exist and chaos would reign free and unchecked.

All joking aside, synchronization objects such as mutexes and semaphores are essential to safe multithreading and are found on just about any platform under the sun. Mutexes and semaphores alike have one purpose: to keep different threads from messing around with bits and bytes at the same time another thread is, keeping your code free of segfaults and memory access violations alike. But that’s about where the similarities between the synchronization primitives on different platforms end.

POSIX-compliant operating systems with pthreads offer additional really neat synchronization primitives not found on Windows, such as condition variables and read-write locks (the latter is now available on Windows Vista+). And Windows programmers have at their disposal automatic and manual reset events, which make designing certain types of multithreaded software incredibly easy, abstracting away much of the hard-core synchronization logic that lies beneath the hood.

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My Thoughts on Sutter’s “C++ and Beyond 2011”

Posted on by Mahmoud Al-Qudsi
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Around a month ago, Herb Sutter gave a talk on why C++ is once more gaining relevance in the world of programming, and how after a decade of neglect and abandonment, it is set to pave the way into the future. I downloaded it a while ago and finally had a chance to watch it last night; the talk itself is most-excellent and is around 40 minutes long, you can stream it online or download it in a higher-resolution format on Channel 9. Or click below to watch:

As someone that’s been using both C/C++ and .NET extensively over the past years, I found there was one very important point that Sutter glanced on, danced around, and did everything short of actually naming in his talk and it’s that if you’re doing anything remotely intricate or complicated, leaky abstractions in managed languages will bite you in the ass, and end up lowering your productivity, some times (and if what you’re working on is truly complicated, often times) to a point where you’d have been more productive using C or C++ in the first place.

The concept of leaky abstractions isn’t anything new and I’m hardly the first to point out how it can turn a knight in shining armor into a harbinger of doom and destruction. It’s the number one problem fundamentally present in almost any framework, but even more so in managed languages where the framework is all you have, and you’re not allowed to side-step it and build your own foundations to work with (p/invoke and interop aside). But lately it’s becoming more and more of a problem as the “push” for innovation that Sutter speaks of has become a fundamental requirement in just about all corners of the industry.

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Contributing to the Open Source Community

Posted on by NeoSmart Technologies
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A week ago, we tweeted a promise to contribute more to the open source community. As a Research & Development organization, there’s a lot of random code samples, small libraries, forks/modifications of popular scripts, and more that’s just lying around, begging to be open sourced.

While a lot of these may prove to have little to no value to anyone, given how easy it is to make things open source thanks to github, there’s no real drawback to throwing them out there for anyone that may benefit at some unknown point in the future.

We have a couple of hundred miniature projects, test code samples, and other such content across a number of drives to sort through, and whenever we find something useful, this is our promise to the community to share it. To that end, we’ve set up a github repository at http://github.com/neosmart where we’ll be uploading the code, and from where you’re all more than welcome to check it out and contribute back.

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Android: A Fragmented Platform or Not?

Posted on by Mahmoud Al-Qudsi
15

Android RobotIf you were to believe the latest headlines at Business Insider, Android is a fragmented mobile platform and has a negative effect on the applications, for developers and end-users alike. Android is currently in a heated battle with the other two big names in mobile technology (the iPhone and the BlackBerry being the other two), and this is a serious matter definitely worthy of discussion.

But Dan Frommer’s allegations in his latest post on BI don’t really add up. Frommer contends that the official twitter app for Android, which only works on Android v2.1 and up, is proof that Google’s mobile OS isn’t as “unified” as the competitors, and that this is a sign of early-onset serious fragmentation that will only get worse down the line. The thing is… it’s not.

It’s true that Android, available for deployment on any device manufacturers are willing to bundle it with, faces certain compatibility issues. With a multitude of devices, each with its own mostly-unique set of hardware and features, creating software that will run the same for everyone isn’t as easy as it is on the iPhone. But it’s nowhere near as much of an issue as Frommer makes it out to be.

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