Editing Pthreads (section)

{{short description|Execution model which allows for parallel computing}}{{lowercase}}
In [[computing]], '''POSIX Threads''', commonly known as '''pthreads''', is an [[execution model]] that exists independently from a [[programming language]], as well as a [[Parallel computing|parallel execution]] model.  It allows a [[Computer program|program]] to control multiple different flows of work that overlap in time.  Each flow of work is referred to as a ''[[thread (computing)|thread]]'', and creation and control over these flows is achieved by making calls to the POSIX Threads [[API]]. POSIX Threads is an API defined by the [[Institute of Electrical and Electronics Engineers]] (IEEE) standard ''[[POSIX]].1c, Threads extensions (IEEE Std 1003.1c-1995)''.

Implementations of the API are available on many [[Unix-like]] POSIX-conformant [[operating system]]s such as [[FreeBSD]], [[NetBSD]], [[OpenBSD]], [[Linux]], [[macOS]], [[Android (operating system)|Android]],<ref>{{cite web|url=https://android.googlesource.com/platform/bionic/+/10ce969/libc/bionic/pthread.c|title=libc/bionic/pthread.c - platform/bionic - Git at Google|website=android.googlesource.com}}</ref> [[Solaris (operating system)|Solaris]], [[Redox (operating system)|Redox]], and [[AUTOSAR]] Adaptive, typically bundled as a library '''libpthread'''. [[DR-DOS]] and [[Microsoft Windows]] implementations also exist: within the [[Windows Services for UNIX|SFU/SUA]] subsystem which provides a native implementation of a number of POSIX APIs, and also within [[third-party software component|third-party]] packages such as ''pthreads-w32'',<ref>{{cite web|url=http://sources.redhat.com/pthreads-win32/conformance.html|title=Pthread Win-32: Level of standards conformance|date=2006-12-22|access-date=2010-08-29|archive-date=2010-06-11|archive-url=https://web.archive.org/web/20100611172430/http://sources.redhat.com/pthreads-win32/conformance.html|url-status=dead}}</ref> which implements pthreads on top of existing [[Windows API]].