Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!taumet!steve
From: steve@taumet.com (Stephen Clamage)
Newsgroups: comp.lang.c++
Subject: Re: Large stream buffers
Message-ID: <772@taumet.com>
Date: 18 Jun 91 17:01:41 GMT
References: <1991Jun17.171623.6730@NCoast.ORG>
Organization: Taumetric Corporation, San Diego
Lines: 17

dale@NCoast.ORG (Dale Smith) writes:

>How can I prevent an ofstream from flushing it's buffer until it's
>full?  In Borland C++, if I allocate a larger buffer (say 32k or so),
>I still seem to be doing a lot more writes to disk than necessary.

Check the buffering flags ios::stdio and ios::unitbuf for the various
output streams.

If the stdio flag for a stream S is set, cout and cerr are flushed each time
anything is written to stream S.

If the unitbuf flag for a stream S is set, S is flushed every time something
is written to it.
-- 

Steve Clamage, TauMetric Corp, steve@taumet.com