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Operating Systems Linux Ubuntu Does Posix support kernel level threading? Post 302260041 by jim mcnamara on Wednesday 19th of November 2008 01:05:02 PM
Old 11-19-2008
What is a POSIX lib? libpthread.so is the POSIX threads library for a system that supports POSIX threads. How they are implemented is up to the kernel developer, not POSIX.

For Linux there is one API call: clone() that is unique to linux. It is used to exec new processes to be used mostly for threads.

Is POSIX scalable; multiprocessor support?

This does not make much sense to me:
POSIX is a standard, a set of rules - like a green traffic signal means "go". It doesn't say how big or bright the green light has to be. Just says 'must be green'
 

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PTHREAD_KILL_OTHER_THREADS_NP(3)			     Linux Programmer's Manual				  PTHREAD_KILL_OTHER_THREADS_NP(3)

NAME
pthread_kill_other_threads_np - terminate all other threads in process SYNOPSIS
#include <pthread.h> void pthread_kill_other_threads_np(void); DESCRIPTION
pthread_kill_other_threads_np() only has an effect in the LinuxThreads threading implementation. On that implementation, calling this function causes the immediate termination of all threads in the application, except the calling thread. The cancellation state and cancel- lation type of the to-be-terminated threads are ignored, and the cleanup handlers are not called in those threads. CONFORMING TO
This function is a nonstandard GNU extension; hence the suffix "_np" (nonportable) in the name. NOTES
pthread_kill_other_threads_np() is intended to be called just before a thread calls execve(2) or a similar function. This function is designed to address a limitation in the obsolete LinuxThreads implementation whereby the other threads of an application are not automati- cally terminated (as POSIX.1-2001 requires) during execve(2). In the NPTL threading implementation, pthread_kill_other_threads_np() exists, but does nothing. (Nothing needs to be done, because the implementation does the right thing during an execve(2).) SEE ALSO
execve(2), pthread_setcancelstate(3), pthread_setcanceltype(3), pthread_cancel(3), pthreads(7) COLOPHON
This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. Linux 2010-09-09 PTHREAD_KILL_OTHER_THREADS_NP(3)
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