porters-dev Digest, Vol 38, Issue 3

[Barnes, Richard]

We were able to do it at Stratus for our proprietary operating system
VOS, which has user threads rather than kernel threads.  We did have to
make some changes contingent on a new "has_kernel_threads" method that
we put in hotspot/src/share/vm/runtime/os.hpp, which we implemented in
the various OS's.

Best of luck.

Richard Barnes
Stratus Technologies 

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Today's Topics:

   1. openJDK no threads OS (John Smith)
   2. Re: openJDK no threads OS (Alan Bateman)


----------------------------------------------------------------------

Message: 1
Date: Tue, 18 Dec 2012 23:02:30 +0100
From: John Smith <db4hill at gmail.com>
Subject: openJDK no threads OS
To: porters-dev at openjdk.java.net
Message-ID:
	
<CAHoGMcXgV7o=N0b+r5CR3Thny+=UM40odwULunGETNFKE3=iZA at mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

Hi all,


I was wondering is it possible to port openJDK to operating system which
doesn't have thread support in kernel?


With kind regards,
John
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Message: 2
Date: Wed, 19 Dec 2012 14:12:00 +0000
From: Alan Bateman <Alan.Bateman at oracle.com>
Subject: Re: openJDK no threads OS
To: John Smith <db4hill at gmail.com>
Cc: porters-dev at openjdk.java.net
Message-ID: <50D1CB30.3040707 at oracle.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

On 18/12/2012 22:02, John Smith wrote:
> Hi all,
>
>
> I was wondering is it possible to port openJDK to operating system 
> which doesn't have thread support in kernel?
>
>
> With kind regards,
> John
The original "classic VM" (prior to HotSpot) supported green threads, I 
think some of the embedded VMs may still have something similar. So I 
think the answer to your question is "in theory, yes" although it would 
be a massive undertaking.

-Alan.


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