Date: Wed, 4 Mar 92 10:46 +1000
From: Bill Metzenthen <APM233M AT vaxc DOT cc DOT monash DOT edu DOT au>
Subject: Increasing the file handle limit
To: djgpp AT sun DOT soe DOT clarkson DOT edu, listserv AT ucf1vm DOT cc DOT ucf DOT edu
Status: O


Turbo C has an in-built limit of 20 on the number of file handles.
This limit may be reasonably easily removed. I have put together
a small package of code and documentation to deal with increasing the
file handle limit.

The code has been tested with Turbo C v1.5, Turbo C++ v1.0, and Borland
C++ v2.0. It has also been tested with MS-DOS v3.10 and v5.00.

On an MS-DOS system (>= v3.0) the code can provide enough handles to
support 252 simultaneously open files. This number may be smaller if
the system has enhancements such as QEMM or network drivers, etc.

The code does not increase the number of streams which are available
under Turbo C (that is a separate problem). However, code is included
in the package which will increase the number of streams available
under DJGPP and this will allow the 252 files mentioned above to be
all opened as streams. The code for DJGPP applies to DJGPP v1.05.

The package is a little large to post here unless there is enough interest
in it. However, I can email a copy (uuencoded .zoo or .zip file) to anyone
who sends me an email request.



Bill Metzenthen
apm233m AT vaxc DOT cc DOT monash DOT edu DOT au