Newsgroups: comp.parallel.pvm
From: Peter Schaefer <schaefer@malaga.math.uni-augsburg.de>
Subject: Re: Message Buffers
Organization: http://malaga.math.uni-augsburg.de/schaefer/
Date: Mon, 02 Jun 1997 18:10:11 +0200
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Message-ID: <3392F063.167E@malaga.math.uni-augsburg.de>

Eric Eslinger wrote:
> 
> I am writing a sort of a "blanket" object set for my users to interface
> with a whole bunch of different communication protocols, PVM being
> one of them.
> 
> so anyway, the problem is that the model I have works very well with
> a lot of other protocols (sockets, tcpip, etc) but there is this
> teensy weensy problem with PVM.  Message Buffers.  In my code, I have
> my own buffer objects that lay nicely on top of PVM message buffers
> for the most part, what i want to do is:
> 
> PVMBuffer * buf = new PVMBuffer;
> pvm_setrbuf(buffer->bufid());
> pvm_recv(-1, -1);
> unpack a bunch of stuff
> delete buf;
> 
> and have the calls to mkbuf and freebuf in the constructor and
> destructor.  what I am concerned about is a resource leak in the form
> of the default recieve/send buffers being created automatically by
> pvm somewhere and never destroyed, as they get overriden by the
> buffers I create inside my Buffer objects.

I don't know, can't you do the following ?:

> PVMBuffer * buf = new PVMBuffer;
  int oldbuf;
> oldbuf=pvm_setrbuf(buffer->bufid());
  pvm_freebuf(oldbuf);
> pvm_recv(-1, -1);
> //unpack a bunch of stuff
> delete buf;

or perhaps:

> PVMBuffer * buf = new PVMBuffer;
  int oldbuf;
> oldbuf=pvm_setrbuf(buffer->bufid());
> pvm_recv(-1, -1);
> //unpack a bunch of stuff
> delete buf;
  pvm_setrbuf(oldbuf);

Finally, can someone tell me what switch you need for xdr on a paragon
8-| ?
--
Peter Schaefer              
mailto:schaefer@malaga.math.uni-augsburg.de     

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