/*
- * linux/kernel/posix_timers.c
+ * linux/kernel/posix-timers.c
*
*
* 2002-10-15 Posix Clocks & timers
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/time.h>
+#include <linux/mutex.h>
#include <asm/uaccess.h>
#include <asm/semaphore.h>
#include <linux/wait.h>
#include <linux/workqueue.h>
#include <linux/module.h>
+#include <linux/vs_context.h>
/*
* Management arrays for POSIX timers. Timers are kept in slab memory
/*
* Lets keep our timers in a slab cache :-)
*/
-static kmem_cache_t *posix_timers_cache;
+static struct kmem_cache *posix_timers_cache;
static struct idr posix_timers_id;
static DEFINE_SPINLOCK(idr_lock);
struct itimerspec *, struct itimerspec *);
static int common_timer_del(struct k_itimer *timer);
-static int posix_timer_fn(void *data);
+static int posix_timer_fn(struct hrtimer *data);
static struct k_itimer *lock_timer(timer_t timer_id, unsigned long *flags);
static void schedule_next_timer(struct k_itimer *timr)
{
+ struct hrtimer *timer = &timr->it.real.timer;
+
if (timr->it.real.interval.tv64 == 0)
return;
- timr->it_overrun += hrtimer_forward(&timr->it.real.timer,
+ timr->it_overrun += hrtimer_forward(timer, timer->base->get_time(),
timr->it.real.interval);
+
timr->it_overrun_last = timr->it_overrun;
timr->it_overrun = -1;
++timr->it_requeue_pending;
- hrtimer_restart(&timr->it.real.timer);
+ hrtimer_restart(timer);
}
/*
int posix_timer_event(struct k_itimer *timr,int si_private)
{
+ struct vx_info_save vxis;
+ int ret;
+
+ enter_vx_info(task_get_vx_info(timr->it_process), &vxis);
memset(&timr->sigq->info, 0, sizeof(siginfo_t));
timr->sigq->info.si_sys_private = si_private;
/* Send signal to the process that owns this timer.*/
if (timr->it_sigev_notify & SIGEV_THREAD_ID) {
struct task_struct *leader;
- int ret = send_sigqueue(timr->it_sigev_signo, timr->sigq,
- timr->it_process);
+ ret = send_sigqueue(timr->it_sigev_signo, timr->sigq,
+ timr->it_process);
if (likely(ret >= 0))
- return ret;
+ goto out;
timr->it_sigev_notify = SIGEV_SIGNAL;
leader = timr->it_process->group_leader;
timr->it_process = leader;
}
- return send_group_sigqueue(timr->it_sigev_signo, timr->sigq,
+ ret = send_group_sigqueue(timr->it_sigev_signo, timr->sigq,
timr->it_process);
+out:
+ leave_vx_info(&vxis);
+ put_vx_info(vxis.vxi);
+ return ret;
}
EXPORT_SYMBOL_GPL(posix_timer_event);
* This code is for CLOCK_REALTIME* and CLOCK_MONOTONIC* timers.
*/
-static int posix_timer_fn(void *data)
+static int posix_timer_fn(struct hrtimer *timer)
{
- struct k_itimer *timr = data;
+ struct k_itimer *timr;
unsigned long flags;
int si_private = 0;
int ret = HRTIMER_NORESTART;
+ timr = container_of(timer, struct k_itimer, it.real.timer);
spin_lock_irqsave(&timr->it_lock, flags);
if (timr->it.real.interval.tv64 != 0)
*/
if (timr->it.real.interval.tv64 != 0) {
timr->it_overrun +=
- hrtimer_forward(&timr->it.real.timer,
+ hrtimer_forward(timer,
+ timer->base->softirq_time,
timr->it.real.interval);
ret = HRTIMER_RESTART;
++timr->it_requeue_pending;
static void
common_timer_get(struct k_itimer *timr, struct itimerspec *cur_setting)
{
- ktime_t remaining;
+ ktime_t now, remaining, iv;
struct hrtimer *timer = &timr->it.real.timer;
memset(cur_setting, 0, sizeof(struct itimerspec));
- remaining = hrtimer_get_remaining(timer);
- /* Time left ? or timer pending */
- if (remaining.tv64 > 0 || hrtimer_active(timer))
- goto calci;
+ iv = timr->it.real.interval;
+
/* interval timer ? */
- if (timr->it.real.interval.tv64 == 0)
+ if (iv.tv64)
+ cur_setting->it_interval = ktime_to_timespec(iv);
+ else if (!hrtimer_active(timer) &&
+ (timr->it_sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_NONE)
return;
+
+ now = timer->base->get_time();
+
/*
- * When a requeue is pending or this is a SIGEV_NONE timer
- * move the expiry time forward by intervals, so expiry is >
- * now.
+ * When a requeue is pending or this is a SIGEV_NONE
+ * timer move the expiry time forward by intervals, so
+ * expiry is > now.
*/
- if (timr->it_requeue_pending & REQUEUE_PENDING ||
- (timr->it_sigev_notify & ~SIGEV_THREAD_ID) == SIGEV_NONE) {
- timr->it_overrun +=
- hrtimer_forward(timer, timr->it.real.interval);
- remaining = hrtimer_get_remaining(timer);
- }
- calci:
- /* interval timer ? */
- if (timr->it.real.interval.tv64 != 0)
- cur_setting->it_interval =
- ktime_to_timespec(timr->it.real.interval);
+ if (iv.tv64 && (timr->it_requeue_pending & REQUEUE_PENDING ||
+ (timr->it_sigev_notify & ~SIGEV_THREAD_ID) == SIGEV_NONE))
+ timr->it_overrun += hrtimer_forward(timer, now, iv);
+
+ remaining = ktime_sub(timer->expires, now);
/* Return 0 only, when the timer is expired and not pending */
- if (remaining.tv64 <= 0)
- cur_setting->it_value.tv_nsec = 1;
- else
+ if (remaining.tv64 <= 0) {
+ /*
+ * A single shot SIGEV_NONE timer must return 0, when
+ * it is expired !
+ */
+ if ((timr->it_sigev_notify & ~SIGEV_THREAD_ID) != SIGEV_NONE)
+ cur_setting->it_value.tv_nsec = 1;
+ } else
cur_setting->it_value = ktime_to_timespec(remaining);
}
mode = flags & TIMER_ABSTIME ? HRTIMER_ABS : HRTIMER_REL;
hrtimer_init(&timr->it.real.timer, timr->it_clock, mode);
- timr->it.real.timer.data = timr;
timr->it.real.timer.function = posix_timer_fn;
timer->expires = timespec_to_ktime(new_setting->it_value);
return CLOCK_DISPATCH(which_clock, nsleep,
(which_clock, flags, &t, rmtp));
}
+
+/*
+ * nanosleep_restart for monotonic and realtime clocks
+ */
+static int common_nsleep_restart(struct restart_block *restart_block)
+{
+ return hrtimer_nanosleep_restart(restart_block);
+}
+
+/*
+ * This will restart clock_nanosleep. This is required only by
+ * compat_clock_nanosleep_restart for now.
+ */
+long
+clock_nanosleep_restart(struct restart_block *restart_block)
+{
+ clockid_t which_clock = restart_block->arg0;
+
+ return CLOCK_DISPATCH(which_clock, nsleep_restart,
+ (restart_block));
+}
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