t3hn3rd de6fde05cc feature: preemptive process management - implementation progress
Implement a preemptive multitasking system for the Asuro kernel.

Context Switching & Scheduling:
- Custom IRQ0 ISR (contextswitcher.pas) with PUSHAD/POPAD ESP-swap
- Round-robin scheduler with priority-based quantum
- Process table using DList of PProcessContext pointers
- Idle process (PID 0) replaces kernel HLT loop

Process Lifecycle:
- create/kill/terminate/sendMessage API (processmanager.pas)
- Process states: Created, Running, Ready, Suspended, Awaiting,
  Finished, Error
- Parent-child tracking (ParentID, smChildExited notification on reap)
- proc_yield, proc_sleep_ms, proc_await, proc_suspend, proc_exit

Resource Binding & Cleanup:
- Per-process resource list
  (bindResource/unbindResource/unbindAllResources)
- TCP sockets auto-bound to owning process (OwnerPID on TTCPSocket)
- socket_cleanup + auto-unbind in DestroySocket

VTerminal Refactor:
- Multi-instance design (heap-allocated TVTermState per terminal)
- Foreground process with incremental stdout/stderr drain via LVGL timer
- Ctrl+C kills foreground process (killForeground)
- Per-terminal CWD, dir stack, FS builtins (CD/LS/PUSHD/POPD)
- Background job support (& suffix, JOBS/FG commands)
- Command history (Up/Down arrow)

Command Consolidation:
- 14 commands extracted from 9 units into centralized progmanager.pas
- Command procedures exported in host unit interfaces
- E1000/TRACER/stdio builtins kept in-place (conditional/circular)

New Units:
- src/include/proctypes.pas — process type definitions
- src/processmanager.pas — core process manager
- src/prog/ping.pas — standalone ICMP ping process
- src/prog/testcmd.pas — test command (proc_sleep_ms demo)
- src/testprocs.pas — process subsystem smoke tests

Misc:
- ICMP callbacks gain userData parameter for concurrency-safe ping
- CLI/STI guards on kalloc/kfree (lmemorymanager.pas)
- LV_KEY_CTRLC constant + Ctrl+C interception in LVGL keyboard hook
- Window owner PID tracking (windows.pas)
- ISR_32 gate override support (isrmanager.pas)
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2025-03-09 13:01:10 +00:00
2020-10-29 15:27:40 +00:00
2026-03-02 21:41:14 +00:00
2020-10-29 15:27:40 +00:00
2020-10-29 15:27:40 +00:00
ds
2017-05-20 18:25:38 +00:00
2026-02-26 12:23:42 +00:00
2026-03-02 21:48:10 +00:00
2026-03-02 21:41:14 +00:00
2025-03-15 10:52:08 +00:00
2021-07-06 19:18:23 +00:00
2021-07-06 19:18:23 +00:00
2021-07-06 19:18:23 +00:00
2021-07-06 19:18:23 +00:00
2026-02-27 16:30:31 +00:00
2021-07-06 19:18:23 +00:00
2026-03-04 00:00:56 +00:00
2021-07-06 19:18:23 +00:00
2021-07-06 19:18:23 +00:00
2021-07-06 19:18:23 +00:00
2026-02-27 16:30:31 +00:00
2021-06-22 20:55:23 +00:00
2026-02-27 16:30:31 +00:00
2021-06-22 20:54:58 +00:00
2025-03-09 13:01:10 +00:00
2020-10-29 15:35:00 +00:00

Asuro

We welcome everyone to give building/breaking/fixing/shooting Asuro a go, feel free to follow the steps below and mess with Asuro for fun or profit.

Setting up your build environment

Prerequisites

  • WSL2 WSL2 is used in conjunction with Docker to predefine a build environment for Asuro.
  • Docker for Windows Docker is used to ensure a predefined environment with the correct versions of; Freepascal, Binutils, NASM, Make, xorriso & grub-mk-rescue installed is used for compilation. An ISO will be generated at the end of the build process.
  • Git (Obviously) I don't think this needs an explaination.
  • VSCode (Optional, but highly recommended) Visual Studio code is our IDE of choice, and we have a number of recommended plugins.
    • PowerShell Plugin by Microsoft This plugin gives you the ability to use the 'PowerShell' task type, allowing the automatic launching of virtualbox with the resulting image generated during compilation of Asuro.
  • VirtualBox Virtualbox is our Virtualisation environment of choice, don't ask why, it just is.

Installation (correct as of 2021/06/20)

  1. Install WSL2 as described in the article linked above & ensure Virtualization is enabled in the BIOS.

  2. Ensure WSL2 is used by default with the following command:

    wsl --set-default-version 2
    
  3. Install Docker for Windows.

  4. Install Git for Windows.

  5. Install VSCode & the listed plugins.

  6. Install VirtualBox (v7+).

  7. Clone this repository.

  8. Run the following command in the root of the repo to build the docker image:

    docker compose build builder
    
  9. Run the following command to compile Asuro:

    docker compose run builder
    
  10. Create a new virtual machine in Virtualbox and mount the Asuro.iso generated in step 9 as a boot image.

  11. Add the virtualbox installation directory to your %PATH% environment variable, usually:

    %PROGRAMFILES%\Oracle\VirtualBox
    
  12. Naviage to your virtualbox machines folder, this is usually the following

    %userprofile%\VirtualBox VMs\<VM Name>
    

    Open the Virtual Machine Definition file (.vbox) in your text editor of choice and find the following line:

    <Machine uuid="{7d395c96-891c-4139-b77d-9b6b144b0b93}" name="Asuro" OSType="Linux" snapshotFolder="Snapshots" lastStateChange="2021-06-20T20:33:07Z">
    

    Copy the uuid, in our case 7d395c96-891c-4139-b77d-9b6b144b0b93 & create a localenv.json file in the project root with the following content:

    {
        "VirtualBox":{
            "MachineName":"<YOUR_UUID_OR_MACHINE_NAME>"
        }
    }
    

    This will allow VSCode to automatically launch VirtualBox once Asuro has been compiled.

    You can also enable the serial adapter "COM1" in mode "Raw File", give it a path, and provide this path in the localenv.json as follows:

    {
        "VirtualBox" : {
            "MachineName": "<YOUR_UUID_OR_MACHINE_NAME>",
            "LogLocation": "Fully\\Qualified\\Path\\To\\Your\\Log\\File"
        }
    }
    

    This will allow you to see the console output from Asuro in your host terminal.

  13. Open your project folder in VSCode, use CTRL+SHIFT+B to build & F5 to build + run in VBox.

  14. Congratulations! You can now play with Asuro!

Notes & Gotchas

  • The above process has been updated to be compatible with VirtualBox 7+, in which VBoxSDL was removed and vboxmanage should be used in its place. A small wrapper powershell script is used to achieve this.
  • It was noted that Windows builds above 20H2 seem to have issues installing WSL2. We may have to wait for a patch from Microsoft to fix this. Our devs are currently using build 20H2.
S
Description
An x86 Operating System that started development in 2015 as somewhat of an academic project. Written almost entirely in Freepascal, with NASM used only for bootstrapping & minimal low-level routines, Asuro is a purely hobbyist operating system that differs quite majorly in design from any mainstream OS.
https://asuro.xyz
Readme
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Pascal 98.3%
Python 0.8%
Shell 0.7%
Assembly 0.1%