/* PUBLIC HTVMS_cancel_timer()
** Cancel a specific or all timers
** ON ENTRY:
** n timer number (0 to cancel all timers)
**
**
** ON EXIT:
**
*/
PUBLIC void HTVMS_cancel_timer ARGS1(
CONST int, n)
{
long Result;
Result = SYS$CANTIM(n, 0);
}
static void
waitForSomething(void)
{
#if defined(__vms) && ( __VMS_VER < 70000000 )
static struct timeval6 zerotime =
{0};
unsigned int timer_efn;
#define timer_id 'glut' /* random :-) number */
unsigned int wait_mask;
#else
static struct timeval zerotime =
{0, 0};
#if !defined(_WIN32)
fd_set fds;
#endif
#endif
#ifdef OLD_VMS
struct timeval6 now, timeout, waittime;
#else
struct timeval now, timeout, waittime;
#endif
#if !defined(_WIN32)
int rc;
#endif
/* Flush X protocol since XPending does not do this
implicitly. */
XFlush(__glutDisplay);
if (XPending(__glutDisplay)) {
/* It is possible (but quite rare) that XFlush may have
needed to wait for a writable X connection file
descriptor, and in the process, may have had to read off
X protocol from the file descriptor. If XPending is true,
this case occured and we should avoid waiting in select
since X protocol buffered within Xlib is due to be
processed and potentially no more X protocol is on the
file descriptor, so we would risk waiting improperly in
select. */
goto immediatelyHandleXinput;
}
#if defined(__vms) && ( __VMS_VER < 70000000 )
timeout = __glutTimerList->timeout;
GETTIMEOFDAY(&now);
wait_mask = 1 << (__glutConnectionFD & 31);
if (IS_AFTER(now, timeout)) {
/* We need an event flag for the timer. */
/* XXX The `right' way to do this is to use LIB$GET_EF, but
since it needs to be in the same cluster as the EFN for
the display, we will have hack it. */
timer_efn = __glutConnectionFD - 1;
if ((timer_efn / 32) != (__glutConnectionFD / 32)) {
timer_efn = __glutConnectionFD + 1;
}
rc = SYS$CLREF(timer_efn);
rc = SYS$SETIMR(timer_efn, &timeout, NULL, timer_id, 0);
wait_mask |= 1 << (timer_efn & 31);
} else {
timer_efn = 0;
}
rc = SYS$WFLOR(__glutConnectionFD, wait_mask);
if (timer_efn != 0 && SYS$CLREF(timer_efn) == SS$_WASCLR) {
rc = SYS$CANTIM(timer_id, PSL$C_USER);
}
/* XXX There does not seem to be checking of "rc" in the code
above. Can any of the SYS$ routines above fail? */
#else /* not vms6.2 or lower */
#if !defined(_WIN32)
FD_ZERO(&fds);
FD_SET(__glutConnectionFD, &fds);
#endif
timeout = __glutTimerList->timeout;
GETTIMEOFDAY(&now);
if (IS_AFTER(now, timeout)) {
TIMEDELTA(waittime, timeout, now);
} else {
waittime = zerotime;
}
#if !defined(_WIN32)
rc = select(__glutConnectionFD + 1, &fds,
NULL, NULL, &waittime);
if (rc < 0 && errno != EINTR)
__glutFatalError("select error.");
#else
MsgWaitForMultipleObjects(0, NULL, FALSE,
waittime.tv_sec*1000 + waittime.tv_usec/1000, QS_ALLINPUT);
#endif
#endif /* not vms6.2 or lower */
/* Without considering the cause of select unblocking, check
for pending X events and handle any timeouts (by calling
processEventsAndTimeouts). We always look for X events
even if select returned with 0 (indicating a timeout);
otherwise we risk starving X event processing by continous
timeouts. */
if (XPending(__glutDisplay)) {
immediatelyHandleXinput:
processEventsAndTimeouts();
} else {
if (__glutTimerList)
handleTimeouts();
}
}
