Hi !_1

[Wfranc]

Could anyone tell me something about PREEMPTION and REENTRANCE ? (OS)
I am really a "dummy", so I really need someone who would be kind to give me some details about these. Thank you so much !!! :)




Best Regards,

[Elrond]

I can't, but it would be MUCH more useful if you put a proper title that means something in your thread!!!! Something like "Preemption and Reentrance" at least, and may be even more detailed, instead of "Hi"!

[Wfranc]

I can't

Why ? I am sure that you know much more than I do about this. The two terms I meant are related to OS. I donot undertand much about them !!!:( . So I just hope someone will shed a light on me and give me some instructions !!!:). They arenot homework or questions in exams at all !!! I donot need to be counted up, that is why this thread is here !!!





Best Regards,

[Gabriel Fleseriu]

As Elrond already said, your chanses to have your post read by the people here are much better if you choose a better title for the thread. There are zillions of threads named "Hi", "Help" and "Urgent" around.

Back to your question: did you search the net? A quick search on Google returned me this page on reentrant functions (http://www.fsinc.com/reference/html/com9aid.htm) along with a lot of others. You can do the same regarding preemption. If you have a specific question, come back here and ask it.

You have to understand that both topics are so large that the best one of un can do is to direct you to some web resources. For that, we'd need to search the web -- and that's a thing you can do yourself.

[Wfranc]

Oh It is you again. You are really nice !!!
Thank you so much :D




Regards,

[Krishnaa]

Reentrant function := The function or piece of code which can safly shared by threads/processes(sometimes).
Usually such functions should not have dependancies on any other non-reentrant function , variables which are static and not guarded with sync code etc.

Preemption := Taking away the time slice.