There are several thread libraries are available with UNIX. These libraries have different
characteristics in the way the interact with the kernel and in the way they schedule
threads for running. What are the differences between POSIX threads and GNU portable thread library (pth). And how to write program which would demonstrate them.

Thanks for any help
best regards

Adam Gasior
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Anthony2000Connect With a Mentor Commented:
of course the link would help as well:
Is this a homework?

Some thread libraries are implemented at kernel level and some are at user level. Posix Threads (pthreads) were designed to be portable. I am sure other were as well. But, I not 100% sure.

Here is a link that is titled "Implementing a Thread Library on Linux".  It also provides some examples and other links with additional information.

I hope this helps,

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