Stefano Mazzocchi wrote:
[EMAIL PROTECTED] wrote:
Author: tellison
Date: Fri Feb 10 05:57:38 2006
New Revision: 376690
URL: http://svn.apache.org/viewcvs?rev=376690&view=rev
Log:
Applying patches received as HARMONY-42 (com.ibm.io.nio.FileChannel is
not fully implemented)
- refactoring of some java platform code
- additional behavior on NIO file channels
- refactoring of some IO code
- work in progress on memory mapping
Tim's commits made me think about something that I thought about a
loooooong time ago (probably 1999) in the "would be awesome" kind of
department but I put off for a future where we would have a project to
work on a JVM.
turns out we do have one now and turns out that APR[1] is a library that
is now very solid and reached API stability over years of work by a lot
of people.
so, here it is, does it make sense to have harmony depend on APR and
therefore abstract away all those OS-specificities? (I'm talking about
both the VM and the native part of the class library).
I've thought about this a while, and while I'm personally committed to
using APR wherever and whenever we can, I don't think it's wise to let
the APR tail wag the VM internal architecture dog, so to speak.
For example, the VM should have resource requirements that APR doesn't
have, and that make no sense for general APR usage. (For example,
coordinating memory use between APR and the VM...)
I think that we need a clear 'interface' between the VM and the "OS
Abstraction Component", which I expect will then be implemented using
APR for every platform APR supports.
However, where there is no APR support for a platform, or someone wants
to do something differently, they can just (re) implement the "OS
Abstraction Compoment" as they see fit.
It also has a major social side effects: it would create the ultimate
social bridge between the HTTPD/APR side of the foundation and the java
side of the foundation, maybe allowing people from one side to
contribute to the other, or, at least to help out in the interface
between them which naturally is the JVM.
What do you think?
I think that doing our implementations using APR is a solid way to go.
A good place to start looking is JCHEVM and BootVM...
geir
- Re: Using APR for Harmony's native link to the OS? Geir Magnusson Jr
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