Module: xenomai-rpm Branch: for-upstream Commit: 86e9126274b238e326c3c5e8929c86334d6f74a4 URL: http://git.xenomai.org/?p=xenomai-rpm.git;a=commit;h=86e9126274b238e326c3c5e8929c86334d6f74a4
Author: Philippe Gerum <[email protected]> Date: Fri Aug 20 07:51:59 2010 +0200 nucleus: requeue blocked non-periodic timers properly Single-stepping into a Xenomai application should freeze timers to avoid overruns, until the program is continued. Unfortunately, non-periodic timers are not requeued when the time base is unblocked, preventing their timeout handler to be fired, thus causing the tasks pending on them to hang indefinitely. This patch requeues those timers properly, by interval of 250 ms, until the timebase is unlocked. --- ksrc/nucleus/timer.c | 23 +++++++++++++++-------- 1 files changed, 15 insertions(+), 8 deletions(-) diff --git a/ksrc/nucleus/timer.c b/ksrc/nucleus/timer.c index d813c4f..bb38fea 100644 --- a/ksrc/nucleus/timer.c +++ b/ksrc/nucleus/timer.c @@ -342,10 +342,10 @@ void xntimer_tick_aperiodic(void) { xnsched_t *sched = xnpod_current_sched(); xntimerq_t *timerq = &sched->timerqueue; + xnticks_t now, interval; xntimerh_t *holder; xntimer_t *timer; xnsticks_t delta; - xnticks_t now; /* * Optimisation: any local timer reprogramming triggered by @@ -389,13 +389,18 @@ void xntimer_tick_aperiodic(void) __setbits(timer->status, XNTIMER_FIRED); } else if (likely(!testbits(timer->status, XNTIMER_PERIODIC))) { /* - * Postpone the next tick to a - * reasonable date in the future, - * waiting for the timebase to be - * unlocked at some point. + * Make the blocked timer elapse again + * at a reasonably close date in the + * future, waiting for the timebase to + * be unlocked at some point. Timers + * are blocked when single-stepping + * into an application using a + * debugger, so it is fine to wait for + * 250 ms for the user to continue + * program execution. */ - xntimerh_date(&timer->aplink) = xntimerh_date(&sched->htimer.aplink); - continue; + interval = xnarch_ns_to_tsc(250000000ULL); + goto requeue; } } else { /* @@ -411,8 +416,10 @@ void xntimer_tick_aperiodic(void) continue; } + interval = timer->interval; + requeue: do { - xntimerh_date(&timer->aplink) += timer->interval; + xntimerh_date(&timer->aplink) += interval; } while (xntimerh_date(&timer->aplink) < now + nklatency); xntimer_enqueue_aperiodic(timer); } _______________________________________________ Xenomai-git mailing list [email protected] https://mail.gna.org/listinfo/xenomai-git
