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When scheduling a new timer, check to see if we missed our last wakeup

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by more than 15 seconds.  If we have, SIGNAL().
This commit is contained in:
Michael Graff
2002-09-09 20:04:10 +00:00
parent 72ea295e09
commit e5242f042b
1 changed files with 32 additions and 7 deletions
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39
lib/isc/timer.c
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@@ -15,12 +15,13 @@
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: timer.c,v 1.69 2002/09/09 06:01:06 marka Exp $ */
/* $Id: timer.c,v 1.70 2002/09/09 20:04:10 explorer Exp $ */
#include <config.h>
#include <isc/condition.h>
#include <isc/heap.h>
#include <isc/log.h>
#include <isc/magic.h>
#include <isc/mem.h>
#include <isc/msgs.h>
@@ -183,6 +184,31 @@ schedule(isc_timer_t *timer, isc_time_t *now, isc_boolean_t signal_ok) {
* run thread, or explicitly setting the value in the manager.
*/
#ifdef ISC_PLATFORM_USETHREADS
/*
* This is a temporary (probably) hack to fix a bug on tru64 5.1
* and 5.1a. Sometimes, pthread_cond_timedwait() doesn't actually
* return when the time expires, so here, we check to see if
* we're 15 seconds or more behind, and if we are, we signal
* the dispatcher. This isn't such a bad idea as a general purpose
* watchdog, so perhaps we should just leave it in here.
*/
if (signal_ok) {
isc_interval_t fifteen;
isc_time_t then;
isc_interval_set(&fifteen, 15, 0);
isc_time_add(&manager->due, &fifteen, &then);
if (isc_time_compare(&then, now) < 0) {
SIGNAL(&manager->wakeup);
signal_ok = ISC_FALSE;
isc_log_write(isc_lctx, ISC_LOGCATEGORY_GENERAL,
ISC_LOGMODULE_TIMER, ISC_LOG_WARNING,
"*** POKED TIMER ***");
}
}
if (timer->index == 1 && signal_ok) {
XTRACE(isc_msgcat_get(isc_msgcat, ISC_MSGSET_TIMER,
ISC_MSG_SIGNALSCHED,
@@ -659,12 +685,11 @@ run(void *uap) {
if (manager->nscheduled > 0) {
XTRACETIME2(isc_msgcat_get(isc_msgcat,
ISC_MSGSET_GENERAL,
ISC_MSG_WAITUNTIL,
"waituntil"),
manager->due, now);
result = WAITUNTIL(&manager->wakeup, &manager->lock,
&manager->due);
ISC_MSGSET_GENERAL,
ISC_MSG_WAITUNTIL,
"waituntil"),
manager->due, now);
result = WAITUNTIL(&manager->wakeup, &manager->lock, &manager->due);
INSIST(result == ISC_R_SUCCESS ||
result == ISC_R_TIMEDOUT);
} else {