On Tue, 18 Jun 2002, Roger Ripley wrote:
> I have a problem with Dosemu hanging after 30 minutes
> of keyboard inactivity. If a key is pressed after the
> 30 minutes have expired, CPU usage will go up to 100%
> and after 10 minutes the application may start responding
> again, and receive the keystrokes that were buffered in
> the interim. It occurs in multiple applications,
Hmm this looks suspiciously like an integer overflow:
2^31 microseconds = 35 mins 47 secs.
There is only one time out test in the keyboard code, to see if ESC
times out (after 0.25 sec).
The patch below avoids the problem - really, stretches it from 35mins
to ~600000 years. That should be enough for now.
This is untested. Please test it. I'd like to sleep now instead of
waiting 35 mins.
Bart
--- dosemu-1.1.3.2/src/plugin/term/keyb_slang.c Sun May 26 16:57:56 2002
+++ dosemu-1.1.3.3/src/plugin/term/keyb_slang.c Wed Jun 19 01:35:32 2002
@@ -873,9 +873,8 @@
static int sltermio_input_pending(void)
{
struct timeval scr_tv;
- hitimer_t t_start;
+ hitimer_t t_start, t_dif;
fd_set fds;
- long t_dif;
#if 0
#define THE_TIMEOUT 750000L
@@ -890,13 +889,13 @@
t_start = GETusTIME(0);
errno = 0;
while ((int)select(keyb_state.kbd_fd + 1, &fds, NULL, NULL, &scr_tv) < (int)1)
{
- t_dif = (long)(GETusTIME(0) - t_start);
+ t_dif = GETusTIME(0) - t_start;
if ((t_dif >= THE_TIMEOUT) || (errno != EINTR))
return 0;
errno = 0;
scr_tv.tv_sec = 0L;
- scr_tv.tv_usec = THE_TIMEOUT - t_dif;
+ scr_tv.tv_usec = THE_TIMEOUT - (long)t_dif;
}
return 1;
}
-
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