Implement POSIX timers. Current only CLOCK_REALTIME and CLOCK_MONOTONIC
clock are supported. I have plan to merge XSI timer ITIMER_REAL and other two CPU timers into the new code, current three slots are available for the XSI timers. The SIGEV_THREAD notification type is not supported yet because our sigevent struct lacks of two member fields: sigev_notify_function sigev_notify_attributes I have found the sigevent is used in AIO, so I won't add the two members unless the AIO code is adjusted.
This commit is contained in:
David Xu
parent
5da49fcb8a
commit
86857b368d
@ -480,6 +480,9 @@ do_execve(td, args, mac_p)
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*/
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fdunshare(p, td);
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/* Clear POSIX timers */
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itimers_event_hook(p, ITIMER_EV_EXEC);
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/*
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* Malloc things before we need locks.
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*/
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@ -207,8 +207,6 @@ exit1(struct thread *td, int rv)
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PROC_LOCK(p);
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stopprofclock(p);
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p->p_flag &= ~(P_TRACED | P_PPWAIT);
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sigqueue_flush(&p->p_sigqueue);
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sigqueue_flush(&td->td_sigqueue);
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/*
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* Stop the real interval timer. If the handler is currently
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@ -221,8 +219,12 @@ exit1(struct thread *td, int rv)
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KASSERT(!timevalisset(&p->p_realtimer.it_value),
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("realtime timer is still armed"));
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}
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sigqueue_flush(&p->p_sigqueue);
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sigqueue_flush(&td->td_sigqueue);
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PROC_UNLOCK(p);
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itimers_event_hook(p, ITIMER_EV_EXIT);
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/*
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* Reset any sigio structures pointing to us as a result of
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* F_SETOWN with our pid.
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@ -278,6 +278,7 @@ proc_linkup(struct proc *p, struct ksegrp *kg, struct thread *td)
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TAILQ_INIT(&p->p_threads); /* all threads in proc */
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TAILQ_INIT(&p->p_suspended); /* Threads suspended */
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sigqueue_init(&p->p_sigqueue, p);
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itimers_init(&p->p_itimers);
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p->p_numksegrps = 0;
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p->p_numthreads = 0;
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@ -47,15 +47,21 @@ __FBSDID("$FreeBSD$");
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#include <sys/sysent.h>
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#include <sys/proc.h>
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#include <sys/time.h>
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#include <sys/timers.h>
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#include <sys/timetc.h>
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#include <sys/vnode.h>
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#include <vm/vm.h>
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#include <vm/vm_extern.h>
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#define MAX_CLOCKS (CLOCK_MONOTONIC+1)
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int tz_minuteswest;
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int tz_dsttime;
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static struct kclock posix_clocks[MAX_CLOCKS];
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static uma_zone_t itimer_zone = NULL;
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/*
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* Time of day and interval timer support.
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*
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@ -70,6 +76,34 @@ static int settime(struct thread *, struct timeval *);
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static void timevalfix(struct timeval *);
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static void no_lease_updatetime(int);
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static void itimer_start(void);
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static int itimer_init(void *, int, int);
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static void itimer_fini(void *, int);
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static void itimer_enter(struct itimer *);
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static void itimer_leave(struct itimer *);
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static struct itimer *itimer_find(struct proc *, timer_t, int);
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static void itimers_alloc(struct proc *);
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static int realtimer_create(struct itimer *);
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static int realtimer_gettime(struct itimer *, struct itimerspec *);
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static int realtimer_settime(struct itimer *, int,
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struct itimerspec *, struct itimerspec *);
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static int realtimer_delete(struct itimer *);
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static void realtimer_clocktime(clockid_t, struct timeval *);
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static void realtimer_expire(void *);
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static void realtimer_event_hook(struct proc *, clockid_t, int event);
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static int kern_timer_create(struct thread *, clockid_t,
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struct sigevent *, timer_t *, timer_t);
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static int kern_timer_delete(struct thread *, timer_t);
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int register_posix_clock(int, struct kclock *);
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void itimer_fire(struct itimer *it);
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#define CLOCK_CALL(clock, call, arglist) \
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((*posix_clocks[clock].call) arglist)
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SYSINIT(posix_timer, SI_SUB_P1003_1B, SI_ORDER_FIRST+4, itimer_start, NULL);
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static void
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no_lease_updatetime(deltat)
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int deltat;
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@ -659,8 +693,7 @@ int
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itimerfix(struct timeval *tv)
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{
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if (tv->tv_sec < 0 || tv->tv_sec > 100000000 ||
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tv->tv_usec < 0 || tv->tv_usec >= 1000000)
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if (tv->tv_sec < 0 || tv->tv_usec < 0 || tv->tv_usec >= 1000000)
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return (EINVAL);
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if (tv->tv_sec == 0 && tv->tv_usec != 0 && tv->tv_usec < tick)
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tv->tv_usec = tick;
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@ -807,3 +840,632 @@ ppsratecheck(struct timeval *lasttime, int *curpps, int maxpps)
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return (maxpps < 0 || *curpps < maxpps);
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}
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}
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static void
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itimer_start(void)
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{
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struct kclock rt_clock = {
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.timer_create = realtimer_create,
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.timer_delete = realtimer_delete,
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.timer_settime = realtimer_settime,
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.timer_gettime = realtimer_gettime,
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.event_hook = realtimer_event_hook
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};
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itimer_zone = uma_zcreate("itimer", sizeof(struct itimer),
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NULL, NULL, itimer_init, itimer_fini, UMA_ALIGN_PTR, 0);
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register_posix_clock(CLOCK_REALTIME, &rt_clock);
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register_posix_clock(CLOCK_MONOTONIC, &rt_clock);
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}
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int
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register_posix_clock(int clockid, struct kclock *clk)
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{
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if ((unsigned)clockid >= MAX_CLOCKS) {
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printf("%s: invalid clockid\n", __func__);
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return (0);
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}
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posix_clocks[clockid] = *clk;
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return (1);
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}
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static int
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itimer_init(void *mem, int size, int flags)
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{
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struct itimer *it;
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it = (struct itimer *)mem;
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mtx_init(&it->it_mtx, "itimer lock", NULL, MTX_DEF);
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return (0);
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}
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static void
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itimer_fini(void *mem, int size)
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{
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struct itimer *it;
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it = (struct itimer *)mem;
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mtx_destroy(&it->it_mtx);
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}
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static void
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itimer_enter(struct itimer *it)
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{
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mtx_assert(&it->it_mtx, MA_OWNED);
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it->it_usecount++;
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}
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static void
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itimer_leave(struct itimer *it)
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{
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mtx_assert(&it->it_mtx, MA_OWNED);
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KASSERT(it->it_usecount > 0, ("invalid it_usecount"));
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if (--it->it_usecount == 0 && (it->it_flags & ITF_WANTED) != 0)
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wakeup(it);
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}
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#ifndef _SYS_SYSPROTO_H_
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struct timer_create_args {
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clockid_t clock_id;
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struct sigevent * evp;
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timer_t * timerid;
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};
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#endif
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int
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timer_create(struct thread *td, struct timer_create_args *uap)
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{
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struct sigevent *evp1, ev;
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timer_t id;
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int error;
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if (uap->evp != NULL) {
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error = copyin(uap->evp, &ev, sizeof(ev));
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if (error != 0)
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return (error);
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evp1 = &ev;
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} else
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evp1 = NULL;
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error = kern_timer_create(td, uap->clock_id, evp1, &id, -1);
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if (error == 0) {
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error = copyout(&id, uap->timerid, sizeof(timer_t));
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if (error != 0)
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kern_timer_delete(td, id);
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}
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return (error);
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}
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static int
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kern_timer_create(struct thread *td, clockid_t clock_id,
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struct sigevent *evp, timer_t *timerid, timer_t preset_id)
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{
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struct proc *p = td->td_proc;
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struct itimer *it;
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int id;
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int error;
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if (clock_id < 0 || clock_id >= MAX_CLOCKS)
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return (EINVAL);
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if (posix_clocks[clock_id].timer_create == NULL)
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return (EINVAL);
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if (evp != NULL) {
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if (evp->sigev_notify != SIGEV_NONE &&
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evp->sigev_notify != SIGEV_SIGNAL)
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return (EINVAL);
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if (evp->sigev_notify == SIGEV_SIGNAL &&
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!_SIG_VALID(evp->sigev_signo))
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return (EINVAL);
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}
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if (p->p_itimers.its_timers == NULL)
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itimers_alloc(p);
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it = uma_zalloc(itimer_zone, M_WAITOK);
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it->it_flags = 0;
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it->it_usecount = 0;
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it->it_active = 0;
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timevalclear(&it->it_time.it_value);
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timevalclear(&it->it_time.it_interval);
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it->it_overrun = 0;
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it->it_overrun_last = 0;
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it->it_clockid = clock_id;
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it->it_timerid = -1;
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it->it_proc = p;
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ksiginfo_init(&it->it_ksi);
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it->it_ksi.ksi_flags |= KSI_INS | KSI_EXT;
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error = CLOCK_CALL(clock_id, timer_create, (it));
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if (error != 0)
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goto out;
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PROC_LOCK(p);
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if (preset_id != -1) {
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KASSERT(preset_id >= 0 && preset_id < 3, ("invalid preset_id"));
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id = preset_id;
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if (p->p_itimers.its_timers[id] != NULL) {
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PROC_UNLOCK(p);
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error = 0;
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goto out;
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}
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} else {
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/*
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* Find a free timer slot, skipping those reserved
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* for setitimer().
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*/
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for (id = 3; id < TIMER_MAX; id++)
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if (p->p_itimers.its_timers[id] == NULL)
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break;
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if (id == TIMER_MAX) {
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PROC_UNLOCK(p);
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error = EAGAIN;
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goto out;
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}
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}
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it->it_timerid = id;
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p->p_itimers.its_timers[id] = it;
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if (evp != NULL)
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it->it_sigev = *evp;
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else {
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it->it_sigev.sigev_notify = SIGEV_SIGNAL;
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switch (clock_id) {
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default:
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case CLOCK_REALTIME:
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it->it_sigev.sigev_signo = SIGALRM;
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break;
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case CLOCK_VIRTUAL:
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it->it_sigev.sigev_signo = SIGVTALRM;
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break;
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case CLOCK_PROF:
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it->it_sigev.sigev_signo = SIGPROF;
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break;
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}
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it->it_sigev.sigev_value.sigval_int = id;
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}
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if (it->it_sigev.sigev_notify == SIGEV_SIGNAL) {
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it->it_ksi.ksi_signo = it->it_sigev.sigev_signo;
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it->it_ksi.ksi_code = SI_TIMER;
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it->it_ksi.ksi_value = it->it_sigev.sigev_value;
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it->it_ksi.ksi_timerid = id;
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}
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PROC_UNLOCK(p);
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*timerid = id;
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return (0);
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out:
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ITIMER_LOCK(it);
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CLOCK_CALL(it->it_clockid, timer_delete, (it));
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ITIMER_UNLOCK(it);
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uma_zfree(itimer_zone, it);
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return (error);
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}
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#ifndef _SYS_SYSPROTO_H_
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struct timer_delete_args {
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timer_t timerid;
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};
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#endif
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int
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timer_delete(struct thread *td, struct timer_delete_args *uap)
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{
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return (kern_timer_delete(td, uap->timerid));
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}
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static struct itimer *
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itimer_find(struct proc *p, timer_t timerid, int include_deleting)
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{
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struct itimer *it;
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PROC_LOCK_ASSERT(p, MA_OWNED);
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if ((p->p_itimers.its_timers == NULL) || (timerid >= TIMER_MAX) ||
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(it = p->p_itimers.its_timers[timerid]) == NULL) {
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return (NULL);
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}
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ITIMER_LOCK(it);
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if (!include_deleting && (it->it_flags & ITF_DELETING) != 0) {
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ITIMER_UNLOCK(it);
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it = NULL;
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}
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return (it);
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}
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static int
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kern_timer_delete(struct thread *td, timer_t timerid)
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{
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struct proc *p = td->td_proc;
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struct itimer *it;
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PROC_LOCK(p);
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it = itimer_find(p, timerid, 0);
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if (it == NULL) {
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PROC_UNLOCK(p);
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return (EINVAL);
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}
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PROC_UNLOCK(p);
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it->it_flags |= ITF_DELETING;
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while (it->it_usecount > 0) {
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it->it_flags |= ITF_WANTED;
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msleep(it, &it->it_mtx, PPAUSE, "itimer", 0);
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}
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it->it_flags &= ~ITF_WANTED;
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CLOCK_CALL(it->it_clockid, timer_delete, (it));
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ITIMER_UNLOCK(it);
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PROC_LOCK(p);
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if (KSI_ONQ(&it->it_ksi))
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sigqueue_take(&it->it_ksi);
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p->p_itimers.its_timers[timerid] = NULL;
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PROC_UNLOCK(p);
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uma_zfree(itimer_zone, it);
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return (0);
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}
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#ifndef _SYS_SYSPROTO_H_
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struct timer_settime_args {
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timer_t timerid;
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int flags;
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const struct itimerspec * value;
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struct itimerspec * ovalue;
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};
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#endif
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int
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timer_settime(struct thread *td, struct timer_settime_args *uap)
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{
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struct proc *p = td->td_proc;
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struct itimer *it;
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struct itimerspec val, oval, *ovalp;
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int error;
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error = copyin(uap->value, &val, sizeof(val));
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if (error != 0)
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return (error);
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if (uap->ovalue != NULL)
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ovalp = &oval;
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else
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ovalp = NULL;
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PROC_LOCK(p);
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if (uap->timerid < 3 ||
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(it = itimer_find(p, uap->timerid, 0)) == NULL) {
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PROC_UNLOCK(p);
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error = EINVAL;
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} else {
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PROC_UNLOCK(p);
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itimer_enter(it);
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error = CLOCK_CALL(it->it_clockid, timer_settime,
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(it, uap->flags, &val, ovalp));
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itimer_leave(it);
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ITIMER_UNLOCK(it);
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}
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if (error == 0 && uap->ovalue != NULL)
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error = copyout(ovalp, uap->ovalue, sizeof(*ovalp));
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return (error);
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}
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#ifndef _SYS_SYSPROTO_H_
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struct timer_gettime_args {
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timer_t timerid;
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struct itimerspec * value;
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};
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#endif
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int
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timer_gettime(struct thread *td, struct timer_gettime_args *uap)
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{
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struct proc *p = td->td_proc;
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struct itimer *it;
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struct itimerspec val;
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int error;
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PROC_LOCK(p);
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if (uap->timerid < 3 ||
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(it = itimer_find(p, uap->timerid, 0)) == NULL) {
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PROC_UNLOCK(p);
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error = EINVAL;
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} else {
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PROC_UNLOCK(p);
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itimer_enter(it);
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error = CLOCK_CALL(it->it_clockid, timer_gettime,
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(it, &val));
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itimer_leave(it);
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ITIMER_UNLOCK(it);
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}
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if (error == 0)
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error = copyout(&val, uap->value, sizeof(val));
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return (error);
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}
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#ifndef _SYS_SYSPROTO_H_
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struct timer_getoverrun_args {
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timer_t timerid;
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};
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#endif
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int
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timer_getoverrun(struct thread *td, struct timer_getoverrun_args *uap)
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{
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struct proc *p = td->td_proc;
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struct itimer *it;
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int error ;
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PROC_LOCK(p);
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if (uap->timerid < 3 ||
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(it = itimer_find(p, uap->timerid, 0)) == NULL) {
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PROC_UNLOCK(p);
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error = EINVAL;
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} else {
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PROC_UNLOCK(p);
|
||||
td->td_retval[0] = it->it_overrun_last;
|
||||
ITIMER_UNLOCK(it);
|
||||
error = 0;
|
||||
}
|
||||
return (error);
|
||||
}
|
||||
|
||||
static int
|
||||
realtimer_create(struct itimer *it)
|
||||
{
|
||||
callout_init_mtx(&it->it_callout, &it->it_mtx, 0);
|
||||
return (0);
|
||||
}
|
||||
|
||||
static int
|
||||
realtimer_delete(struct itimer *it)
|
||||
{
|
||||
mtx_assert(&it->it_mtx, MA_OWNED);
|
||||
callout_stop(&it->it_callout);
|
||||
return (0);
|
||||
}
|
||||
|
||||
static int
|
||||
realtimer_gettime(struct itimer *it, struct itimerspec *ovalue)
|
||||
{
|
||||
struct timespec ts;
|
||||
|
||||
mtx_assert(&it->it_mtx, MA_OWNED);
|
||||
|
||||
TIMEVAL_TO_TIMESPEC(&it->it_time.it_value, &ovalue->it_value);
|
||||
TIMEVAL_TO_TIMESPEC(&it->it_time.it_interval, &ovalue->it_interval);
|
||||
if (it->it_clockid == CLOCK_REALTIME)
|
||||
getnanotime(&ts);
|
||||
else /* CLOCK_MONOTONIC */
|
||||
getnanouptime(&ts);
|
||||
if (ovalue->it_value.tv_sec != 0 || ovalue->it_value.tv_nsec != 0) {
|
||||
timespecsub(&ovalue->it_value, &ts);
|
||||
if (ovalue->it_value.tv_sec < 0 ||
|
||||
(ovalue->it_value.tv_sec == 0 &&
|
||||
ovalue->it_value.tv_nsec == 0)) {
|
||||
ovalue->it_value.tv_sec = 0;
|
||||
ovalue->it_value.tv_nsec = 1;
|
||||
}
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
static int
|
||||
realtimer_settime(struct itimer *it, int flags,
|
||||
struct itimerspec *value, struct itimerspec *ovalue)
|
||||
{
|
||||
struct timeval tv, tv2;
|
||||
struct itimerval val;
|
||||
|
||||
mtx_assert(&it->it_mtx, MA_OWNED);
|
||||
|
||||
TIMESPEC_TO_TIMEVAL(&val.it_value, &value->it_value);
|
||||
TIMESPEC_TO_TIMEVAL(&val.it_interval, &value->it_interval);
|
||||
|
||||
if (itimerfix(&val.it_value))
|
||||
return (EINVAL);
|
||||
|
||||
if (timevalisset(&val.it_value)) {
|
||||
if (itimerfix(&val.it_interval))
|
||||
return (EINVAL);
|
||||
} else {
|
||||
timevalclear(&val.it_interval);
|
||||
}
|
||||
|
||||
if (ovalue != NULL)
|
||||
realtimer_gettime(it, ovalue);
|
||||
|
||||
it->it_time = val;
|
||||
if (timevalisset(&val.it_value)) {
|
||||
realtimer_clocktime(it->it_clockid, &tv);
|
||||
tv2 = val.it_value;
|
||||
if ((flags & TIMER_ABSTIME) == 0) {
|
||||
/* Convert to absolute time. */
|
||||
timevaladd(&it->it_time.it_value, &tv);
|
||||
} else {
|
||||
timevalsub(&tv2, &tv);
|
||||
/*
|
||||
* We don't care if tv2 is negative, tztohz will
|
||||
* fix it.
|
||||
*/
|
||||
}
|
||||
callout_reset(&it->it_callout, tvtohz(&tv2),
|
||||
realtimer_expire, it);
|
||||
} else {
|
||||
callout_stop(&it->it_callout);
|
||||
}
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
static void
|
||||
realtimer_clocktime(clockid_t id, struct timeval *tv)
|
||||
{
|
||||
if (id == CLOCK_REALTIME)
|
||||
getmicrotime(tv);
|
||||
else /* CLOCK_MONOTONIC */
|
||||
getmicrouptime(tv);
|
||||
}
|
||||
|
||||
static void
|
||||
realtimer_event_hook(struct proc *p, clockid_t clock_id, int event)
|
||||
{
|
||||
struct itimers *its;
|
||||
struct itimer *it;
|
||||
int i;
|
||||
|
||||
/*
|
||||
* Timer 0 (ITIMER_REAL) is XSI interval timer, according to POSIX
|
||||
* specification, it should be inherited by new process image.
|
||||
*/
|
||||
if (event == ITIMER_EV_EXEC)
|
||||
i = 1;
|
||||
else
|
||||
i = 0;
|
||||
its = &p->p_itimers;
|
||||
for (; i < TIMER_MAX; i++) {
|
||||
if ((it = its->its_timers[i]) != NULL &&
|
||||
it->it_clockid == clock_id) {
|
||||
ITIMER_LOCK(it);
|
||||
callout_stop(&it->it_callout);
|
||||
ITIMER_UNLOCK(it);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* Timeout callback for realtime timer */
|
||||
static void
|
||||
realtimer_expire(void *arg)
|
||||
{
|
||||
struct timeval tv, tv2;
|
||||
struct itimer *it;
|
||||
struct proc *p;
|
||||
|
||||
it = (struct itimer *)arg;
|
||||
p = it->it_proc;
|
||||
|
||||
realtimer_clocktime(it->it_clockid, &tv);
|
||||
/* Only fire if time is reached. */
|
||||
if (timevalcmp(&it->it_time.it_value, &tv, <=)) {
|
||||
if (timevalisset(&it->it_time.it_interval)) {
|
||||
timevaladd(&it->it_time.it_value,
|
||||
&it->it_time.it_interval);
|
||||
while (timevalcmp(&it->it_time.it_value, &tv, <=)) {
|
||||
it->it_overrun++;
|
||||
timevaladd(&it->it_time.it_value,
|
||||
&it->it_time.it_interval);
|
||||
}
|
||||
} else {
|
||||
/* single shot timer ? */
|
||||
timevalclear(&it->it_time.it_value);
|
||||
}
|
||||
if (timevalisset(&it->it_time.it_value)) {
|
||||
tv2 = it->it_time.it_value;
|
||||
timevalsub(&tv2, &tv);
|
||||
callout_reset(&it->it_callout, tvtohz(&tv2),
|
||||
realtimer_expire, it);
|
||||
}
|
||||
ITIMER_UNLOCK(it);
|
||||
itimer_fire(it);
|
||||
ITIMER_LOCK(it);
|
||||
} else if (timevalisset(&it->it_time.it_value)) {
|
||||
tv2 = it->it_time.it_value;
|
||||
timevalsub(&tv2, &tv);
|
||||
callout_reset(&it->it_callout, tvtohz(&tv2), realtimer_expire,
|
||||
it);
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
itimer_fire(struct itimer *it)
|
||||
{
|
||||
struct proc *p = it->it_proc;
|
||||
|
||||
if (it->it_sigev.sigev_notify == SIGEV_SIGNAL) {
|
||||
PROC_LOCK(p);
|
||||
ITIMER_LOCK(it);
|
||||
if (KSI_ONQ(&it->it_ksi)) {
|
||||
it->it_overrun++;
|
||||
it->it_ksi.ksi_overrun = it->it_overrun;
|
||||
it->it_overrun_last = it->it_overrun;
|
||||
} else {
|
||||
it->it_ksi.ksi_overrun = it->it_overrun;
|
||||
it->it_overrun_last = it->it_overrun;
|
||||
it->it_overrun = 0;
|
||||
psignal_info(p, &it->it_ksi);
|
||||
}
|
||||
PROC_UNLOCK(p);
|
||||
ITIMER_UNLOCK(it);
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
itimers_alloc(struct proc *p)
|
||||
{
|
||||
struct itimer **itp;
|
||||
|
||||
itp = malloc(sizeof(struct itimer *) * TIMER_MAX, M_SUBPROC,
|
||||
M_WAITOK | M_ZERO);
|
||||
PROC_LOCK(p);
|
||||
if (p->p_itimers.its_timers == NULL) {
|
||||
p->p_itimers.its_timers = itp;
|
||||
PROC_UNLOCK(p);
|
||||
} else {
|
||||
PROC_UNLOCK(p);
|
||||
free(itp, M_SUBPROC);
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
itimers_init(struct itimers *its)
|
||||
{
|
||||
LIST_INIT(&its->its_virtual);
|
||||
LIST_INIT(&its->its_prof);
|
||||
TAILQ_INIT(&its->its_worklist);
|
||||
its->its_timers = NULL;
|
||||
}
|
||||
|
||||
/* Clean up timers when some process events are being triggered. */
|
||||
void
|
||||
itimers_event_hook(struct proc *p, int event)
|
||||
{
|
||||
struct itimers *its;
|
||||
struct itimer *it;
|
||||
int i;
|
||||
|
||||
if (p->p_itimers.its_timers != NULL) {
|
||||
its = &p->p_itimers;
|
||||
for (i = 0; i < MAX_CLOCKS; ++i) {
|
||||
if (posix_clocks[i].event_hook != NULL)
|
||||
CLOCK_CALL(i, event_hook, (p, i, event));
|
||||
}
|
||||
/*
|
||||
* According to susv3, XSI interval timers should be inherited
|
||||
* by new image.
|
||||
*/
|
||||
if (event == ITIMER_EV_EXEC)
|
||||
i = 3;
|
||||
else if (event == ITIMER_EV_EXIT)
|
||||
i = 0;
|
||||
else
|
||||
panic("unhandled event");
|
||||
for (; i < TIMER_MAX; ++i) {
|
||||
if ((it = its->its_timers[i]) != NULL) {
|
||||
PROC_LOCK(p);
|
||||
if (KSI_ONQ(&it->it_ksi))
|
||||
sigqueue_take(&it->it_ksi);
|
||||
PROC_UNLOCK(p);
|
||||
uma_zfree(itimer_zone, its->its_timers[i]);
|
||||
its->its_timers[i] = NULL;
|
||||
}
|
||||
}
|
||||
if (its->its_timers[0] == NULL &&
|
||||
its->its_timers[1] == NULL &&
|
||||
its->its_timers[2] == NULL) {
|
||||
free(its->its_timers, M_SUBPROC);
|
||||
p->p_itimers.its_timers = NULL;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@ -439,11 +439,15 @@
|
||||
const struct timespec *tp); }
|
||||
234 AUE_NULL MSTD { int clock_getres(clockid_t clock_id, \
|
||||
struct timespec *tp); }
|
||||
235 AUE_NULL UNIMPL timer_create
|
||||
236 AUE_NULL UNIMPL timer_delete
|
||||
237 AUE_NULL UNIMPL timer_settime
|
||||
238 AUE_NULL UNIMPL timer_gettime
|
||||
239 AUE_NULL UNIMPL timer_getoverrun
|
||||
235 AUE_NULL MSTD { int timer_create(clockid_t clock_id, \
|
||||
struct sigevent *evp, timer_t *timerid); }
|
||||
236 AUE_NULL MSTD { int timer_delete(timer_t timerid); }
|
||||
237 AUE_NULL MSTD { int timer_settime(timer_t timerid, int flags, \
|
||||
const struct itimerspec *value, \
|
||||
struct itimerspec *ovalue); }
|
||||
238 AUE_NULL MSTD { int timer_gettime(timer_t timerid, struct \
|
||||
itimerspec *value); }
|
||||
239 AUE_NULL MSTD { int timer_getoverrun(timer_t timerid); }
|
||||
240 AUE_NULL MSTD { int nanosleep(const struct timespec *rqtp, \
|
||||
struct timespec *rmtp); }
|
||||
241 AUE_NULL UNIMPL nosys
|
||||
|
||||
@ -57,6 +57,7 @@
|
||||
#else
|
||||
#include <sys/pcpu.h>
|
||||
#endif
|
||||
#include <sys/timers.h>
|
||||
#include <sys/ucontext.h>
|
||||
#include <sys/ucred.h>
|
||||
#include <machine/proc.h> /* Machine-dependent proc substruct. */
|
||||
@ -546,6 +547,7 @@ struct proc {
|
||||
LIST_ENTRY(proc) p_sibling; /* (e) List of sibling processes. */
|
||||
LIST_HEAD(, proc) p_children; /* (e) Pointer to list of children. */
|
||||
struct mtx p_mtx; /* (n) Lock for this struct. */
|
||||
struct itimers p_itimers; /* (c) POSIX interval timers. */
|
||||
sigqueue_t p_sigqueue; /* (c) Sigs not delivered to a td. */
|
||||
#define p_siglist p_sigqueue.sq_signals
|
||||
|
||||
|
||||
@ -1,4 +1,5 @@
|
||||
/*-
|
||||
* Copyright (c) 2005 David Xu <davidxu@freebsd.org>
|
||||
* Copyright (c) 1994 by Chris Provenzano, proven@mit.edu
|
||||
* All rights reserved.
|
||||
*
|
||||
@ -37,6 +38,78 @@
|
||||
#ifndef _SYS_TIMERS_H_
|
||||
#define _SYS_TIMERS_H_
|
||||
|
||||
#include <sys/time.h>
|
||||
/*
|
||||
* Structures used to manage POSIX timers in a process.
|
||||
*/
|
||||
struct itimer {
|
||||
struct mtx it_mtx;
|
||||
struct sigevent it_sigev;
|
||||
struct itimerval it_time;
|
||||
struct proc *it_proc;
|
||||
int it_flags;
|
||||
int it_usecount;
|
||||
int it_overrun; /* Overruns currently accumulating */
|
||||
int it_overrun_last; /* Overruns associated w/ a delivery */
|
||||
int it_clockid;
|
||||
int it_timerid;
|
||||
ksiginfo_t it_ksi;
|
||||
union {
|
||||
/* realtime */
|
||||
struct {
|
||||
struct callout it_callout;
|
||||
} _rt;
|
||||
|
||||
#endif
|
||||
/* cpu timer */
|
||||
struct {
|
||||
LIST_ENTRY(itimer) it_link;
|
||||
TAILQ_ENTRY(itimer) it_worklink;
|
||||
int it_active;
|
||||
int it_cflags;
|
||||
} _cpu;
|
||||
} _data;
|
||||
};
|
||||
|
||||
#define it_callout _data._rt.it_callout
|
||||
#define it_link _data._cpu.it_link
|
||||
#define it_active _data._cpu.it_active
|
||||
#define it_worklink _data._cpu.it_worklink
|
||||
#define it_cflags _data._cpu.it_cflags
|
||||
|
||||
#define ITF_DELETING 0x01
|
||||
#define ITF_WANTED 0x02
|
||||
|
||||
#define ITCF_ONWORKLIST 0x01
|
||||
|
||||
#define TIMER_MAX 32
|
||||
|
||||
#define ITIMER_LOCK(it) mtx_lock(&(it)->it_mtx)
|
||||
#define ITIMER_UNLOCK(it) mtx_unlock(&(it)->it_mtx)
|
||||
|
||||
LIST_HEAD(itimerlist, itimer);
|
||||
|
||||
struct itimers {
|
||||
struct itimerlist its_virtual;
|
||||
struct itimerlist its_prof;
|
||||
TAILQ_HEAD(, itimer) its_worklist;
|
||||
struct itimer **its_timers;
|
||||
};
|
||||
|
||||
struct kclock {
|
||||
int (*timer_create)(struct itimer *timer);
|
||||
int (*timer_settime)(struct itimer * timer, int flags,
|
||||
struct itimerspec * new_value,
|
||||
struct itimerspec * old_value);
|
||||
int (*timer_delete)(struct itimer * timer);
|
||||
int (*timer_gettime)(struct itimer * timer,
|
||||
struct itimerspec * cur_value);
|
||||
void (*event_hook)(struct proc *p, clockid_t clock_id, int event);
|
||||
};
|
||||
|
||||
/* Event values for event_hook() */
|
||||
#define ITIMER_EV_EXEC 0
|
||||
#define ITIMER_EV_EXIT 1
|
||||
|
||||
void itimers_init(struct itimers *its);
|
||||
void itimers_event_hook(struct proc *p, int event);
|
||||
|
||||
#endif /* !_SYS_TIMERS_H_ */
|
||||
|
||||
@ -62,4 +62,13 @@ struct timespec {
|
||||
|
||||
#endif /* __BSD_VISIBLE */
|
||||
|
||||
/*
|
||||
* Structure defined by POSIX.1b to be like a itimerval, but with
|
||||
* timespecs. Used in the timer_*() system calls.
|
||||
*/
|
||||
struct itimerspec {
|
||||
struct timespec it_interval;
|
||||
struct timespec it_value;
|
||||
};
|
||||
|
||||
#endif /* _SYS_TIMESPEC_H_ */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user