Paul Edwards wrote in a message to All:

 PE> I used to be able to open 92 files under OS/2 2.1 with the
 PE> below program, but under OS/2 3.0 I can only get 13.  Has
 PE> something changed with regards to file handles?  The
 PE> executable is unchanged, and compiled with Watcom.

This is a Watcom-specific issue.  See the section of the Programmer's Guide
"Commonly Asked Questions and Answers: How more than 20 files at a
time can be opened."  You need to use the operating system-independent
_grow_handles() function to notify the run-time library to allocate more
static FILE objects for fopen() to return.  The Watcom _grow_handles()
function also performs the necessary notifications to the operating system
where this is supported, as in OS/2 with the DosSetMaxFH() API call.

I don't know why this would vary when running the same executable on
different versions of OS/2, however.  This might be an interaction with the
MMOS2 code that reportedly increased the default number of file handles
improperly.
 
-- Mike


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