#include <linux/compiler.h>
#include <linux/idr.h>
#include <linux/posix-timers.h>
+#include <linux/syscalls.h>
#include <linux/wait.h>
#include <linux/workqueue.h>
+#include <linux/vs_cvirt.h>
#ifndef div_long_long_rem
#include <asm/div64.h>
*/
static kmem_cache_t *posix_timers_cache;
static struct idr posix_timers_id;
-static spinlock_t idr_lock = SPIN_LOCK_UNLOCKED;
+static DEFINE_SPINLOCK(idr_lock);
/*
* Just because the timer is not in the timer list does NOT mean it is
* resolution. Here we define the standard CLOCK_REALTIME as a
* 1/HZ resolution clock.
*
- * CPUTIME & THREAD_CPUTIME: We are not, at this time, definding these
- * two clocks (and the other process related clocks (Std
- * 1003.1d-1999). The way these should be supported, we think,
- * is to use large negative numbers for the two clocks that are
- * pinned to the executing process and to use -pid for clocks
- * pinned to particular pids. Calls which supported these clock
- * ids would split early in the function.
- *
* RESOLUTION: Clock resolution is used to round up timer and interval
* times, NOT to report clock times, which are reported with as
* much resolution as the system can muster. In some cases this
- * resolution may depend on the underlaying clock hardware and
+ * resolution may depend on the underlying clock hardware and
* may not be quantifiable until run time, and only then is the
* necessary code is written. The standard says we should say
* something about this issue in the documentation...
*
* At this time all functions EXCEPT clock_nanosleep can be
* redirected by the CLOCKS structure. Clock_nanosleep is in
- * there, but the code ignors it.
+ * there, but the code ignores it.
*
* Permissions: It is assumed that the clock_settime() function defined
* for each clock will take care of permission checks. Some
#define p_timer_del(clock,a) \
if_clock_do((clock)->timer_del, do_timer_delete, (a))
-void register_posix_clock(int clock_id, struct k_clock *new_clock);
static int do_posix_gettime(struct k_clock *clock, struct timespec *tp);
static u64 do_posix_clock_monotonic_gettime_parts(
struct timespec *tp, struct timespec *mo);
int do_posix_clock_monotonic_gettime(struct timespec *tp);
-int do_posix_clock_monotonic_settime(struct timespec *tp);
static struct k_itimer *lock_timer(timer_t timer_id, unsigned long *flags);
static inline void unlock_timer(struct k_itimer *timr, unsigned long flags)
struct k_clock clock_monotonic = {.res = CLOCK_REALTIME_RES,
.abs_struct = NULL,
.clock_get = do_posix_clock_monotonic_gettime,
- .clock_set = do_posix_clock_monotonic_settime
+ .clock_set = do_posix_clock_nosettime
};
register_posix_clock(CLOCK_REALTIME, &clock_realtime);
unlock_timer(timr, flags);
}
-/*
- * Notify the task and set up the timer for the next expiration (if
- * applicable). This function requires that the k_itimer structure
- * it_lock is taken. This code will requeue the timer only if we get
- * either an error return or a flag (ret > 0) from send_seg_info
- * indicating that the signal was either not queued or was queued
- * without an info block. In this case, we will not get a call back to
- * do_schedule_next_timer() so we do it here. This should be rare...
-
- * An interesting problem can occur if, while a signal, and thus a call
- * back is pending, the timer is rearmed, i.e. stopped and restarted.
- * We then need to sort out the call back and do the right thing. What
- * we do is to put a counter in the info block and match it with the
- * timers copy on the call back. If they don't match, we just ignore
- * the call back. The counter is local to the timer and we use odd to
- * indicate a call back is pending. Note that we do allow the timer to
- * be deleted while a signal is pending. The standard says we can
- * allow that signal to be delivered, and we do.
- */
-
-static void timer_notify_task(struct k_itimer *timr)
+int posix_timer_event(struct k_itimer *timr,int si_private)
{
- int ret;
-
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.
timr->sigq->info.si_code = SI_TIMER;
timr->sigq->info.si_tid = timr->it_id;
timr->sigq->info.si_value = timr->it_sigev_value;
- if (timr->it_incr)
- timr->sigq->info.si_sys_private = ++timr->it_requeue_pending;
- else {
- remove_from_abslist(timr);
- }
-
if (timr->it_sigev_notify & SIGEV_THREAD_ID) {
if (unlikely(timr->it_process->flags & PF_EXITING)) {
timr->it_sigev_notify = SIGEV_SIGNAL;
timr->it_process = timr->it_process->group_leader;
goto group;
}
- ret = send_sigqueue(timr->it_sigev_signo, timr->sigq,
+ return send_sigqueue(timr->it_sigev_signo, timr->sigq,
timr->it_process);
}
else {
group:
- ret = send_group_sigqueue(timr->it_sigev_signo, timr->sigq,
+ return send_group_sigqueue(timr->it_sigev_signo, timr->sigq,
timr->it_process);
}
- if (ret) {
- /*
- * signal was not sent because of sig_ignor
- * we will not get a call back to restart it AND
- * it should be restarted.
- */
- schedule_next_timer(timr);
- }
}
/*
* This function gets called when a POSIX.1b interval timer expires. It
* is used as a callback from the kernel internal timer. The
- * run_timer_list code ALWAYS calls with interrutps on.
+ * run_timer_list code ALWAYS calls with interrupts on.
* This code is for CLOCK_REALTIME* and CLOCK_MONOTONIC* timers.
*/
spin_unlock(&abs_list.lock);
}
- if (do_notify)
- timer_notify_task(timr);
+ if (do_notify) {
+ int si_private=0;
+
+ if (timr->it_incr)
+ si_private = ++timr->it_requeue_pending;
+ else {
+ remove_from_abslist(timr);
+ }
+
+ if (posix_timer_event(timr, si_private))
+ /*
+ * signal was not sent because of sig_ignor
+ * we will not get a call back to restart it AND
+ * it should be restarted.
+ */
+ schedule_next_timer(timr);
+ }
unlock_timer(timr, flags); /* hold thru abs lock to keep irq off */
}
new_timer->it_clock = which_clock;
new_timer->it_incr = 0;
new_timer->it_overrun = -1;
- init_timer(&new_timer->it_timer);
- new_timer->it_timer.expires = 0;
- new_timer->it_timer.data = (unsigned long) new_timer;
- new_timer->it_timer.function = posix_timer_fn;
- set_timer_inactive(new_timer);
+ if (posix_clocks[which_clock].timer_create) {
+ error = posix_clocks[which_clock].timer_create(new_timer);
+ if (error)
+ goto out;
+ } else {
+ init_timer(&new_timer->it_timer);
+ new_timer->it_timer.expires = 0;
+ new_timer->it_timer.data = (unsigned long) new_timer;
+ new_timer->it_timer.function = posix_timer_fn;
+ set_timer_inactive(new_timer);
+ }
/*
* return the timer_id now. The next step is hard to
return 0;
}
-int do_posix_clock_monotonic_settime(struct timespec *tp)
+int do_posix_clock_nosettime(struct timespec *tp)
+{
+ return -EINVAL;
+}
+
+int do_posix_clock_notimer_create(struct k_itimer *timer)
{
return -EINVAL;
}
+int do_posix_clock_nonanosleep(int which_clock, int flags, struct timespec *t)
+{
+#ifndef ENOTSUP
+ return -EOPNOTSUPP; /* aka ENOTSUP in userland for POSIX */
+#else /* parisc does define it separately. */
+ return -ENOTSUP;
+#endif
+}
+
asmlinkage long
sys_clock_settime(clockid_t which_clock, const struct timespec __user *tp)
{
return do_sys_settimeofday(&new_tp, NULL);
}
-asmlinkage long
-sys_clock_gettime(clockid_t which_clock, struct timespec __user *tp)
+static int do_clock_gettime(clockid_t which_clock, struct timespec *tp)
{
- struct timespec rtn_tp;
- int error = 0;
-
if ((unsigned) which_clock >= MAX_CLOCKS ||
!posix_clocks[which_clock].res)
return -EINVAL;
- error = do_posix_gettime(&posix_clocks[which_clock], &rtn_tp);
+ return do_posix_gettime(&posix_clocks[which_clock], tp);
+}
+
+asmlinkage long
+sys_clock_gettime(clockid_t which_clock, struct timespec __user *tp)
+{
+ struct timespec kernel_tp;
+ int error;
- if (!error && copy_to_user(tp, &rtn_tp, sizeof (rtn_tp)))
+ error = do_clock_gettime(which_clock, &kernel_tp);
+ if (!error && copy_to_user(tp, &kernel_tp, sizeof (kernel_tp)))
error = -EFAULT;
return error;
if ((unsigned) t.tv_nsec >= NSEC_PER_SEC || t.tv_sec < 0)
return -EINVAL;
- ret = do_clock_nanosleep(which_clock, flags, &t);
+ if (posix_clocks[which_clock].nsleep)
+ ret = posix_clocks[which_clock].nsleep(which_clock, flags, &t);
+ else
+ ret = do_clock_nanosleep(which_clock, flags, &t);
/*
* Do this here as do_clock_nanosleep does not have the real address
*/
git://git.onelab.eu / linux-2.6.git / blobdiff