Re: threads demystified

From: Bill Tschumy (bill_at_otherwiseDELETE.com)
Date: 02/13/05 

Date: Sun, 13 Feb 2005 02:29:37 GMT

On Sat, 12 Feb 2005 20:00:57 -0600, Andersen wrote
(in article <420EB4D9.6000208@hotmail.com>):

> One question, are java threads mapped to OS threads, or are they all
> running within one single OS thread?
>
> regards,
> Andersen
>
> Sachin wrote:
>
>> Hi Andersen,
>>
>> Not sure if the following thread helps ...
>>
>> http://groups-beta.google.com/group/comp.lang.java.programmer/browse_thread/
>> thread/ba0b73e49874fd3a/318178780f039744?q=Max+Java+Threads&_done=%2Fgroups%
>> 3Fhl%3Den%26q%3DMax+Java+Threads%26qt_s%3DSearch+Groups%26&_doneTitle=Back+t
>> o+Search&&d#318178780f039744
>>
>> -Sachin
>>

It is up to the implementation to decide since it is not spelled out in the
specification. On most platforms (Mac OS X, Windows, Linux) they are mapped
to OS-level threads. Early in Java's history, on Solaris they were not. The
Solaris JVM used green threads to implement the Java threading model. Not
sure if they still do that or not. 

-- 
Bill Tschumy
Otherwise -- Austin, TX
http://www.otherwise.com

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