http://debianws.lexgopc.com/wiki143/index.php?action=history&feed=atom&title=LinuxThreadsLinuxThreads - Revision history2026-05-01T19:47:17ZRevision history for this page on the wikiMediaWiki 1.43.1http://debianws.lexgopc.com/wiki143/index.php?title=LinuxThreads&diff=2988839&oldid=previmported>Widefox: sep lead2024-01-08T12:56:42Z<p>sep lead</p>
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In the [[Linux]] operating system, '''LinuxThreads''' was a partial implementation of [[POSIX Threads]] introduced in 1996. The main developer of LinuxThreads was [[Xavier Leroy]]. It has been superseded by the [[Native POSIX Thread Library]] (NPTL).<ref>{{cite book|last=Jones|first=M. Tim|title=GNU/Linux application programming|year=2008|publisher=Charles River Media|location=Hingham, Mass.|isbn=978-1-58450-568-6|edition=2nd|page=253|quote=''The 2.6 kernel utilizes the new Native POSIX Thread Library, or NPTL (introduced in 2002), which is a higher performance implementation with numerous advantages over the older component.''}}</ref><br />
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==Implementation==<br />
LinuxThreads had a number of problems, mainly owing to the implementation, which used the [[clone (Linux system call)|clone]] system call to create a new [[process (computing)|process]] sharing the parent's [[address space]]. For example, threads had distinct [[process identifier]]s, causing problems for [[signal (computing)|signal]] handling; LinuxThreads used the signals [[SIGUSR1]] and [[SIGUSR2]] for inter-thread coordination, meaning these signals could not be used by programs.<br />
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To improve the situation, two competing projects were started to develop a replacement; [[NGPT]] (Next Generation POSIX Threads) and [[NPTL]]. NPTL won out and is today shipped with the vast majority of Linux systems. {{As of|2006}}, LinuxThreads may still be seen on production systems, particularly those using version 2.4 or lower of the [[Linux kernel]], as NPTL requires facilities which were specifically added into the 2.6 version of the kernel for its use.<br />
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LinuxThreads was also ported to and used on FreeBSD.<ref>LinuxThreads on FreeBSD [http://www.freebsdsoftware.org/devel/linuxthreads.html] {{Webarchive|url=https://web.archive.org/web/20140808042341/http://www.freebsdsoftware.org/devel/linuxthreads.html |date=2014-08-08 }}</ref><br />
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==References==<br />
{{Reflist}}<br />
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==External links==<br />
* [https://web.archive.org/web/19961128030318/http://pauillac.inria.fr/~xleroy/linuxthreads/ The LinuxThreads library], Xavier Leroy Home Page<br />
* [http://cs.uns.edu.ar/~jechaiz/sosd/clases/extras/03-LinuxThreads%20and%20NPTL.pdf Linux threading models compared: LinuxThreads and NPTL], IBM 2006<br />
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[[Category:Threads (computing)]]</div>imported>Widefox