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Top 23 C++ operating-system Projects
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haiku
The Haiku operating system. (Pull requests will be ignored; patches may be sent to https://review.haiku-os.org).
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WorkOS
The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.
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Project mention: Why does part of the Windows 98 Setup program look older than the rest? | news.ycombinator.com | 2024-04-09SerenityOS replicates that look and feel. It is also implemented in a dialect of C++ that adheres to some of the good parts of C++98: https://serenityos.org
So sad IncludeOS https://github.com/includeos/IncludeOS is no longer developed.
Project mention: Haiku's (Kernel) Condition Variables API: Design and Implementation | news.ycombinator.com | 2023-04-24Haiku uses the System V ABI (mostly.) So, we're doing the same things Linux and the BSDs are here, simply by using GCC or Clang without any special tuning here.
> I reckon that before trying to claim you've innovated here it might be a good sense check to compare baseline.
The baseline is "what are other operating systems' kernel- and userland-level condition variables APIs?" And none of the ones I looked at had anything like what Haiku has here, they all have something which is the more classical "lock-switched condvars" just like POSIX has.
The API itself does not depend on what memory ordering semantics are any more than a "mutex_lock()" API does. The implementation will be somewhat contingent on it, of course, but those are two separate matters.
> What exactly are the Haiku atomic operations, in terms of the C++ 11 Memory Model?
The atomic_() functions are (on most architectures, x86 included) implemented using GCC/Clang's __atomic_* functions, with various __ATOMIC_* orderings chosen as appropriate. You can see them defined in the system header here: https://github.com/haiku/haiku/blob/master/headers/os/suppor...
> because you're innovating before 2011, you're inventing the model
No, not really? GCC has had atomic builtins since at least 4.1.0 in 2006. The documentation (https://gcc.gnu.org/onlinedocs/gcc-4.1.0/gcc/Atomic-Builtins...) says: "In most cases, these builtins are considered a full barrier. That is, no memory operand will be moved across the operation, either forward or backward." -- which is basically equivalent to today's __ATOMIC_SEQ_CST.
> so Haiku is off in the jungle on its own and everybody else has a map now, figure out where you are on that map first.
We already did that years ago. The atomic_() functions linked above in SupportDefs.h have been implemented using the C++11-standard GCC builtins since 2014, and the older __sync_ builtins for years before that.
Anyway, the algorithm described in this article, even if Haiku's atomic functions were not 1:1 with C++11-standard definitions (which they are, as noted above), is clearly portable to other OS kernels. So I am not sure what basis your comment has, regardless.
Project mention: RISC-V support (super-duper ultra WIP) by ElectrodeYT · Pull Request #534 · managarm/managarm | /r/RISCV | 2023-07-09
Project mention: What are some concepts/tools/tricks that are frequently used in C/C++ code for embedded software? | /r/embedded | 2023-07-10The only all-C++ RTOS implementation (that I've come across) is Distortos..
Project mention: Ask HN: Best computer that can't run a modern browser | news.ycombinator.com | 2023-05-12any "Raspberry Pi" with 256 MB - is a perfect test machine.
https://en.wikipedia.org/wiki/Raspberry_Pi
And there is an extra minimal alternative:
Raspberry Pi Pico ( 264 KB; available from $4 + https://github.com/asynts/pico-os )
"Raspberry Pi Pico comes with Dual-Core ARM Cortex M0+ processor, which can run up to 133MHz. It has 264KB of SRAM and 2MB of on-board flash storage, but we can extend up to 16MB of off-chip Flash memory via a dedicated Quad-SPI bus."
Project mention: Progress on GevOS | from scratch 32-bit graphical operating system written in C++ | /r/osdev | 2023-06-07Find it on GitHub.
Source code: MaxOS
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
C++ operating-system related posts
- Why does part of the Windows 98 Setup program look older than the rest?
- SerenityOS
- Fuzzing Ladybird with tools from Google Project Zero
- Sane C++ Libraries
- Serenum: OS from scratch to save computers [video]
- Using Zig to Unit Test a C Application
- SerenityOS – a love letter to '90s user interfaces with a custom Unix-like core
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A note from our sponsor - InfluxDB
www.influxdata.com | 24 Apr 2024
Index
What are some of the best open-source operating-system projects in C++? This list will help you:
| Project | Stars | |
|---|---|---|
| 1 | serenity | 28,519 |
| 2 | IncludeOS | 4,824 |
| 3 | skift | 2,182 |
| 4 | haiku | 1,762 |
| 5 | managarm | 1,302 |
| 6 | Lemon-OS | 1,175 |
| 7 | WingOS | 750 |
| 8 | distortos | 430 |
| 9 | xyris | 153 |
| 10 | JsOS | 140 |
| 11 | sweb | 114 |
| 12 | MaslOS | 86 |
| 13 | LensorOS | 78 |
| 14 | l4re-core | 65 |
| 15 | BadAppleOS | 55 |
| 16 | pico-os | 49 |
| 17 | TempleOS-EE | 48 |
| 18 | GodsEyeView | 47 |
| 19 | Macaron | 43 |
| 20 | cyberWatch | 30 |
| 21 | MaxOS | 30 |
| 22 | apex | 24 |
| 23 | FluxedOS | 21 |
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