From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <java-return-26148-listarch-java=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 30531 invoked by alias); 13 Jul 2009 16:54:05 -0000
Received: (qmail 30521 invoked by uid 22791); 13 Jul 2009 16:54:04 -0000
X-SWARE-Spam-Status: No, hits=-1.2 required=5.0 	tests=AWL,BAYES_00
X-Spam-Check-By: sourceware.org
Received: from mail.gnu.org (HELO mx10.gnu.org) (199.232.76.166)     by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Mon, 13 Jul 2009 16:53:57 +0000
Received: from mail.nanometrics.ca ([206.191.47.130]:55081) 	by monty-python.gnu.org with esmtp (Exim 4.60) 	(envelope-from <BenGardiner@nanometrics.ca>) 	id 1MQOmm-0007Kz-EL 	for java@gcc.gnu.org; Mon, 13 Jul 2009 12:53:52 -0400
Received: from localhost (localhost.localdomain [127.0.0.1]) 	by mail.nanometrics.ca (Postfix) with ESMTP id EF5F5287583A; 	Mon, 13 Jul 2009 12:53:18 -0400 (EDT)
Received: from mail.nanometrics.ca ([127.0.0.1]) 	by localhost (mail.nanometrics.ca [127.0.0.1]) (amavisd-new, port 10024) 	with ESMTP id N2kiAFDHWPCL; Mon, 13 Jul 2009 12:53:18 -0400 (EDT)
Received: from [10.11.2.17] (beng-pc.nanometrics.ca [10.11.2.17]) 	by mail.nanometrics.ca (Postfix) with ESMTP id 604B7287574F; 	Mon, 13 Jul 2009 12:53:18 -0400 (EDT)
Message-ID: <4A5B667E.1030502@nanometrics.ca>
Date: Mon, 13 Jul 2009 16:54:00 -0000
From: Ben Gardiner <BenGardiner@nanometrics.ca>
User-Agent: Thunderbird 2.0.0.22 (Windows/20090605)
MIME-Version: 1.0
To: abhishek desai <abhi00@gmail.com>
CC: java@gcc.gnu.org
Subject: Re: Native finalizer.
References: <898285d30907130950o220c0cfi5f841d800322d8f8@mail.gmail.com>
In-Reply-To: <898285d30907130950o220c0cfi5f841d800322d8f8@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-detected-operating-system: by monty-python.gnu.org: GNU/Linux 2.6 (newer, 3)
X-IsSubscribed: yes
Mailing-List: contact java-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <java.gcc.gnu.org>
List-Id: <java.gcc.gnu.org>
List-Subscribe: <mailto:java-subscribe@gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/java/>
List-Post: <mailto:java@gcc.gnu.org>
List-Help: <mailto:java-help@gcc.gnu.org>, <http://gcc.gnu.org/ml/#faqs>
Sender: java-owner@gcc.gnu.org
X-SW-Source: 2009-07/txt/msg00010.txt.bz2

abhishek desai wrote:
> Hi,
>
> Is there any way to assign a native finalizer method per object to be
> called when the object gets garbage collected ? I want to assign this
> in the native layer.
>   
I think you'll find an example of this in natReference.cc:

void
::java::lang::ref::Reference::create (jobject ref)
{
  // Nothing says you can't make a Reference with a NULL referent.
  // But there's nothing to do in such a case.
  referent = reinterpret_cast<gnu::gcj::RawData *> (ref);
  copy = referent;
  if (referent != NULL)
    {
      JvSynchronize sync (java::lang::ref::Reference::lock);
      // `this' is a new Reference object.  We register a new
      // finalizer for pointed-to object and we arrange a special
      // finalizer for ourselves as well.
      _Jv_RegisterFinalizer (this, finalize_reference);
      _Jv_RegisterFinalizer (referent, finalize_referred_to_object);
      gnu::gcj::RawData **p = &referent;
     _Jv_GCRegisterDisappearingLink ((jobject *) p);
      add_to_hash (this);
    }
}

,Ben