[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Classpath build process and VM-specific issues
From: |
Steven Augart |
Subject: |
Re: Classpath build process and VM-specific issues |
Date: |
Thu, 08 Apr 2004 14:48:40 -0400 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.5) Gecko/20031007 |
Andrew Haley wrote:
Strong typing for legibility and reliability is IMO for more
important.
I strongly agree with this, on software engineering grounds.
> And here it is with named opaque types:
>
> public static final synchronized native int
> g_signal_handlers_unblock_matched(gpointer instance,
> int mask,
> int signal_id,
> int detail,
> GClosurePointer closure,
> gpointer func,
> gpointer data);
These are great examples from SWT.
If we were to do this in the GNU Classpath Java code, then the only
solution I see is to use a preprocessor, and expand gpointer to an int
or long as appropriate, based upon the standard pointer representation
in that platform's usual ABI.
I have no idea what we will do when 128-bit machines become available.
Probably by that time Sun will have added a type called "long long"
or "long128", and we'll expand "gpointer" to that on the 128-bit machines.
Like Andrew, I am uncomfortable with using byte[] to represent a raw
pointer. I also see Etienne's point of view that a class to
encapsulate the data is pretty heavy-weight, and that only a few VMs
would implement special handling for the RawPointer type. Worse, a VM
that did handle it specially would not binary-compatible with one that
treated it as just another class. Ick; there are no good solutions.
I hate to introduce the notion of a preprocessor. Oh well, I guess I
just did.
--
Steven Augart
Jikes RVM, a free, open source, Virtual Machine:
http://oss.software.ibm.com/jikesrvm
- Re: Classpath build process and VM-specific issues, (continued)
RE: Classpath build process and VM-specific issues, Jeroen Frijters, 2004/04/07
RE: Classpath build process and VM-specific issues, Jeroen Frijters, 2004/04/07
RE: Classpath build process and VM-specific issues, Jeroen Frijters, 2004/04/08
RE: Classpath build process and VM-specific issues, Jeroen Frijters, 2004/04/08
Re: Classpath build process and VM-specific issues, Steven Augart, 2004/04/08
RE: Classpath build process and VM-specific issues, Jeroen Frijters, 2004/04/09
RE: Classpath build process and VM-specific issues, Jeroen Frijters, 2004/04/09
RE: Classpath build process and VM-specific issues, Jeroen Frijters, 2004/04/09