colin@la.excelan.com (Colin Goldstein) (03/16/91)
The News Manager)
Nntp-Posting-Host: la
Organization: Novell Inc., Open Systems Div., San Jose CA.
Date: Sat, 16 Mar 1991 03:02:54 GMT
Hi, I would appreciate some help with the following problem.
I have a multi-thread application. There are 4 threads, although
only 2 are of interest here. The main thread controls network
operations, and thread 2 controls the keyboard. If the user wants
to terminate the connection, they hit Esc. When the keyboard thread
detects the Esc key stroke, it calls DosFlagProcess and ends. This
in turn unblocks the network read (EINTR) and thread 1 cleans up
and does some other processing. This all works great.
A problem arises however when the server application wants to end
the transaction. The network read ends when the connection is closed,
but how do I end the keyboard thread???
Here is the code segment I'm using:
KbdThread() /* This is thread 2 */
{
KBDKEYINFO keyinfo; /* structure for keystroke info. */
USHORT rc;
rc = KbdCharIn(&keyinfo, IO_WAIT, 0);
if (rc) {
// some error;
}
.
.
.
}
I've tried using DosClose(0), which does unblock KbdCharIn() and
returns with an error (rc = 3924). This error is undocumented and
I'm not sure that the behaviour of STDIN and STDOUT will be after
I've done this. I could live with this solution if I knew that this
error will be consistant, and if this solution will work in the
future. If anyone has any ideas please share them with me.
Thanks,
Colin
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