Editing Haiku (operating system) (section)

==Architecture==
[[File:Haiku Boot Loader screenshot.png|thumb|Haiku Boot Loader (formerly BootMan)]]
{{Expand section|date=November 2023}}
As with BeOS, Haiku is written in [[C++]] and provides an [[Object-oriented programming|object-oriented]] [[API]].<ref name=":2">{{Cite web |title=Haiku is an open-source operating system for those who miss NeXTStep |url=https://www.zdnet.com/article/haiku-is-an-open-source-operating-system-for-those-who-miss-nextstep/ |access-date=2023-11-26 |website=ZDNET |language=en}}</ref> The Haiku kernel is a modular [[hybrid kernel]] which began as a [[fork (software development)|fork]] of NewOS, a modular monokernel written by former [[Be Inc.]] engineer Travis Geiselbrecht.<ref>{{Cite web |title=Google Fuchsia {{!}} Operating system projects |url=https://os-projects.eu/google-fuchsia |access-date=2023-11-26 |website=os-projects.eu}}</ref> Many features have been implemented, including a [[virtual file system]] (VFS) layer and [[symmetric multiprocessing]] (SMP) support.{{Citation needed|date=November 2023}} It runs on 32-bit and 64-bit [[x86]] processors, and recently has been ported to [[RISC-V]];<ref>{{Cite web |last=Lunduke |first=Bryan |date=2023-05-08 |title=Haiku makes huge progress on RISC-V support |url=https://lunduke.substack.com/p/haiku-makes-huge-progress-on-risc |access-date=2023-11-26 |website=The Lunduke Journal of Technology}}</ref> there is also a port for [[ARM (architecture)|ARM]] under development, but is currently far behind the x86 port.<ref>{{Cite web |title=Compiling Haiku for Arm |url=https://www.haiku-os.org/guides/building/compiling-arm/ |access-date=2023-11-26 |website=Haiku Project |language=en}}</ref>

The [[Application program interface|application program interface (API)]] is based on that of BeOS, which is divided into a number of "kits" which collect related classes together and bear some relation to the [[Library (computing)|library]] which contains the supporting code. In 2007, [[Access (company)|Access]] Co Ltd, the owners of Be, Inc's intellectual property, released the text of this (''BeBook'') under a [[Creative Commons]] licence.<ref>{{Cite web |date=2007-04-03 |title=ACCESS Co. Releases BeBook and Be Newsletters |url=https://www.haiku-os.org/news/2007-04-03_access_co_releases_bebook_and_be_newsletters/ |access-date=2023-11-27 |website=Haiku Project |language=en}}</ref><ref>{{Cite web |title=The Be Book |url=https://www.haiku-os.org/legacy-docs/bebook/TheBeBook_Introduction.html |access-date=2023-11-27 |website=www.haiku-os.org}}</ref> The [[boot loader]] is [[File system|filesystem]] agnostic and can also [[Chain loading|chainload]] [[GRand Unified Bootloader|GRUB]], [[LILO (boot loader)|LILO]] and [[NTLDR]].{{Citation needed|date=November 2023}}

Since the Beta1 release, Haiku's memory management includes [[Address space layout randomization|ASLR]], [[Data Execution Prevention|DEP]], and [[Supervisor Mode Access Prevention|SMAP]].<ref>{{Cite web |title=Haiku R1/beta1 |url=https://tweakers.net/downloads/45799/haiku-r1-beta1.html |access-date=2023-11-27 |website=Tweakers |language=NL}}</ref>[[File:KDL 20200727 Kernel Debugging Land ScreenShot R1B2.png|thumb|A KDL (Kernel Debugging Land) screen, displaying a requested halt which causes Haiku to drop into the [[kernel debugger]]]]
Graphics operations and window management is handled by the app_server [[Interface (object-oriented programming)|protocol]].<ref>{{Cite web |title=Division of Labor: Kits, Libraries, Servers, and Teams |url=https://www.haiku-os.org/documents/dev/division_of_labor_kits_libraries_servers_and_teams/ |access-date=2023-11-27 |website=Haiku Project |language=en}}</ref> [[VESA]] is used as a fallback video output mode.<ref>{{Cite web |title=Screen |url=https://www.haiku-os.org/docs/userguide/en/preferences/screen.html |access-date=2023-11-27 |website=www.haiku-os.org}}</ref> Haiku is [[POSIX]] compatible and has translation layers for [[X11]] and [[Wayland (protocol)|Wayland]].<ref name="haiku_beta_4"/>