Re: Threads in linux.

Ferdinand Prantl (prantl@ff.cuni.cz)
Tue, 17 Aug 1999 17:53:31 +0200

On Tue, Aug 17, 1999 at 02:59:35PM +0100, Peter Liniker wrote:
>
> Linux does not have kernel-level threads, this is true. There is a
> 'clone()' kernel call which can be used to implement threads in user
> space in a library (e.g. libpthreads with glibc2). This threading is as
> good as the windows threading in my experience.

process handling functions must have support in kernel of OS
(I don't speak about software dispatchers runing as stand-alone program.)

someone use clone() and functions to get and handle process id,
someone CreateThread()and simillar bunch of functions ...

> Reason for this implementation is that Linux context-switches are very
> fast, so it made more sense to keep the context-switching code than
> re-write it as a 2 level process model for processes and threads.

Cygwin has his own fork() and clone() implementation but it's a lot
slower than win32 API for threads. I don't know why ...

Ferda Prantl

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Ferdinand Prantl
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