Oberon
OberonSystem
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Oberon | OberonSystem | |
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76 | 7 | |
420 | 39 | |
- | - | |
7.4 | 0.0 | |
about 1 month ago | 7 months ago | |
C++ | C++ | |
GNU General Public License v3.0 only | - |
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Oberon
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Boehm Garbage Collector
> Sure there's a small overhead to smart pointers
Not so small, and it has the potential to significantly speed down an application when not used wisely. Here are e.g. some measurements where the programmer used C++11 and did everything with smart pointers: https://github.com/smarr/are-we-fast-yet/issues/80#issuecomm.... There was a speed down between factor 2 and 10 compared with the C++98 implementation. Also remember that smart pointers create memory leaks when used with circular references, and there is an additional memory allocation involved with each smart pointer.
> Garbage collection has an overhead too of course
The Boehm GC is surprisingly efficient. See e.g. these measurements: https://github.com/rochus-keller/Oberon/blob/master/testcase.... The same benchmark suite as above is compared with different versions of Mono (using the generational GC) and the C code (using Boehm GC) generated with my Oberon compiler. The latter only is 20% slower than the native C++98 version, and still twice as fast as Mono 5.
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Niklaus Wirth, or the Importance of Being Simple
Great, thanks!
There are books online for free, e.g.
https://people.inf.ethz.ch/wirth/ProgInOberonWR.pdf
and https://ssw.jku.at/Research/Books/Oberon2.pdf
Oberon+ is a superset of Oberon 90 and Oberon-2. Here is more information: https://oberon-lang.github.io/, and here is the current language specification: https://github.com/oberon-lang/specification/blob/master/The.... I already had valuable feedback here on HN concerning the channel extensions. Further research brought me to the conclusion, that Oberon+ should support both, channels and also monitors, because even in Go, the sync package primitives are used twice as much as channels. Mutexes and condition variables can be emulated with channels (I tried my luck here: https://www.quora.com/How-can-we-emulate-mutexes-and-conditi...), but for efficiency reasons I think monitors should be directly supported in the language as well, even if it might collide with the goal of simplicity.
Feel free to comment here or e.g. in https://github.com/rochus-keller/Oberon/discussions/45.
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Tex-Oberon: Make Project Oberon Pretty Again
> Does anyone know why Wirth never modernized his style?
Readability. It's easier to read the source code with uppercase keywords. (I think Wirth once said that code is written once but read many times). See this source code - https://raw.githubusercontent.com/rochus-keller/OberonSystem... - to get an idea of this (the uppercase keywords allow you to easily scan the blocks of code). Ofcourse, one can claim that the same can be achieved better today with colour-coded keywords.
If I remember right, the Oberon+ IDE - https://github.com/rochus-keller/Oberon - gives you an option to disable this and use lowercase keywords.
- FreeOberon cross-platform Oberon language IDD
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Project Oberon (New Edition 2013)
> gain a deep understanding of it .. generate smaller subsets of the system
You can use the OberonViewer for this purpose with the original source code, or the Oberon IDE with a version of the Project Oberon System which runs with SDL on all platforms, see https://github.com/rochus-keller/oberon/#binary-versions and https://github.com/rochus-keller/OberonSystem/tree/FFI
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KolibriOS on Single Floppy Disk
> Regardless, which one is more likely to be ported to a different architecture in the future?
Not sure I understand the question. I'm talking about CPU architectures. The current implementation is in x86 assembler. So if you want to run it on AMD64 or ARM, then you have to replace all assembler files, in the present case probable the full source code.
> what are the comparative performance benchmarks of the low-level language versus the high-level language?
I don't have any measurements. But consider that many operating systems are implemented in C (e.g. Linux) with only isolated parts in assembler, so it is easier to port to other architectures. Linux apparently is fast enough and available for nearly every CPU. Oberon in contrast to C is garbage collected, which also affects performance. I have measurements comparing the same benchmark suite implemented in C++ and in Oberon, where the former is about 22% faster (see https://github.com/rochus-keller/Oberon/blob/master/testcase...).
- Why Use Pascal?
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C or LLVM for a fast backend?
I actually had a similar problem some years ago and finally moved away from LLVM because of complexity, continuous research effort and performance. My current Oberon+ implementation works like this: the CIL code generator together with Mono is used during development, integrated with the IDE, using the debugging features integrated in Mono; to deploy the application and to gain another factor 2 of performance C99 instead of CIL can be generated and compiled with any compatible toolchain. Here are some performance measurements: https://github.com/rochus-keller/Oberon/blob/master/testcases/Are-we-fast-yet/Are-we-fast-yet_results_linux.pdf. Compiling to CIL is very fast and the time Mono needs to compile and run is barely noticable.
- Do transpilers just use a lot of string manipulation and concatenation to output the target language?
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Native AOT Overview
> annoying aspects was requiring the .NET runtime ... OpenJDK is a blessed implementation in a way that Mono never was
Which is unjustified, because Mono CLR is just a single executable less than 5 MB which you can download and run without a complicated installation process (see e.g. https://github.com/rochus-keller/Oberon/#binary-versions ). AOT compilation on the other hand is a huge and complex installation depending on a lot of stuff including LLVM, and the resulting executables are not really smaller than the CLR + mscorlib + app.
OberonSystem
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Project Oberon (New Edition 2013)
> gain a deep understanding of it .. generate smaller subsets of the system
You can use the OberonViewer for this purpose with the original source code, or the Oberon IDE with a version of the Project Oberon System which runs with SDL on all platforms, see https://github.com/rochus-keller/oberon/#binary-versions and https://github.com/rochus-keller/OberonSystem/tree/FFI
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The Oberon+ Programming Language
There is a version of the Oberon System compatible with the Oberon+ toolchain and IDE, see https://github.com/rochus-keller/OberonSystem
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GCC 13 to support Modula-2: Follow-up to Pascal lives on in FOSS form
> that's just a compiler on other OSes, right?
It's possible to run an Oberon System with it (see https://github.com/rochus-keller/OberonSystem); it runs on all platforms and the generated C code could even made run as OS on an embedded system if need be; I currently also experiment with System 3 and alternative backends; but this is more for curiosity; from my humble point of view the OS topic is solved with Linux (which can also be configured for very low resource systems).
- Oberon: The tiniest but richest FOSS HLL and OS you've never heard of
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Show HN: New Oberon+ to C99 transpiler for near native performance
Thanks. It's not only Oberon, but Oberon+ as specified here: http://oberon-lang.ch. You can even mix the traditional and new syntax, as e.g. demonstrated here https://github.com/rochus-keller/OberonSystem/tree/FFI.
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New Oberon+ IDE based on the Mono CLR - lean and fast
Yes, Oberon+ is on the direct hereditary line to Oberon 90, Oberon-2 and Oberon-07. Here is more information about the language: http://oberon-lang.ch. There are also implementations of the Oberon System compatible with my compiler and IDE (the LuaJIT version so far): https://github.com/rochus-keller/OberonSystem/.
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Oberon OS Walkthrough
Interesting article, but I would rather go for http://www.projectoberon.com/.
Oberon is a really nice and very well documented programming language and operating system to experiment with. Unfortunately not that much distributions are still available (most links seem to be dead).
If you're interested in the OS or the language, here is a platform independent, stand-alone version running on LuaJIT: https://github.com/rochus-keller/OberonSystem
There is also an integrated IDE with syntax coloring, semantic navigation, and a source level debugger.
The compiler supports small-case keywords and underscores in identifiers. I'm currently working on an extended version of the language.
What are some alternatives?
oberon-riscv - Oberon RISC-V port, based on Samuel Falvo's RISC-V compiler and Peter de Wachter's Project Norebo. Part of an academic project to evaluate Project Oberon on RISC-V.
a2 - Active Oberon System (AOS), aka A2, and Bluebottle OS
MoarVM - A VM with adaptive optimization and JIT compilation, built for Rakudo
TheOberonCompanionCD - This is the original contents of the CD to the book "The Oberon Companion" (vdf, 1998)
Smalltalk - Parser, code model, interpreter and navigable browser for the original Xerox Smalltalk-80 v2 sources and virtual image file
inai - An experiment in structuring a NodeJS application *internally* using REST principles.
tectonic - A modernized, complete, self-contained TeX/LaTeX engine, powered by XeTeX and TeXLive.
oberon-compiler - N. Wirth's Project Oberon RISC compiler ported to Go.
aws-lambda-rust-runtime - A Rust runtime for AWS Lambda
A2OS - Unofficial mirror of the ETH A2 repository
atldotnet - Fully managed, portable and easy-to-use C# library to read and edit audio data and metadata (tags) from various audio formats, playlists and CUE sheets
oberon - Project Oberon RISC emulator in Go