#include <sys/time.h>
#include <time.h>
-#ifdef CLOCK_MONOTONIC
-# define HAVE_MONOTONIC 1
+#define HAVE_EPOLL 1
+
+#ifndef HAVE_MONOTONIC
+# ifdef CLOCK_MONOTONIC
+# define HAVE_MONOTONIC 1
+# endif
#endif
-#define HAVE_REALTIME 1
-#define HAVE_EPOLL 1
-#define HAVE_SELECT 1
+#ifndef HAVE_SELECT
+# define HAVE_SELECT 1
+#endif
+
+#ifndef HAVE_EPOLL
+# define HAVE_EPOLL 0
+#endif
+
+#ifndef HAVE_REALTIME
+# define HAVE_REALTIME 1 /* posix requirement, but might be slower */
+#endif
#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
#define MAX_BLOCKTIME 60.
#include "ev.h"
-struct ev_watcher {
- EV_WATCHER (ev_watcher);
-};
-
-struct ev_watcher_list {
- EV_WATCHER_LIST (ev_watcher_list);
-};
+typedef struct ev_watcher *W;
+typedef struct ev_watcher_list *WL;
+typedef struct ev_watcher_time *WT;
static ev_tstamp now, diff; /* monotonic clock */
ev_tstamp ev_now;
if ((cnt) > cur) \
{ \
int newcnt = cur ? cur << 1 : 16; \
- fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\
base = realloc (base, sizeof (*base) * (newcnt)); \
init (base + cur, newcnt - cur); \
cur = newcnt; \
typedef struct
{
- struct ev_watcher *w;
+ W w;
int events;
} ANPENDING;
static int pendingmax, pendingcnt;
static void
-event (struct ev_watcher *w, int events)
+event (W w, int events)
{
w->pending = ++pendingcnt;
array_needsize (pendings, pendingmax, pendingcnt, );
int ev = w->events & events;
if (ev)
- event ((struct ev_watcher *)w, ev);
+ event ((W)w, ev);
}
}
static void
-queue_events (struct ev_watcher **events, int eventcnt, int type)
+queue_events (W *events, int eventcnt, int type)
{
int i;
/*****************************************************************************/
-static struct ev_timer **atimers;
-static int atimermax, atimercnt;
+static struct ev_timer **timers;
+static int timermax, timercnt;
-static struct ev_timer **rtimers;
-static int rtimermax, rtimercnt;
+static struct ev_periodic **periodics;
+static int periodicmax, periodiccnt;
static void
-upheap (struct ev_timer **timers, int k)
+upheap (WT *timers, int k)
{
- struct ev_timer *w = timers [k];
+ WT w = timers [k];
while (k && timers [k >> 1]->at > w->at)
{
}
static void
-downheap (struct ev_timer **timers, int N, int k)
+downheap (WT *timers, int N, int k)
{
- struct ev_timer *w = timers [k];
+ WT w = timers [k];
while (k < (N >> 1))
{
signals [sig].gotsig = 0;
for (w = signals [sig].head; w; w = w->next)
- event ((struct ev_watcher *)w, EV_SIGNAL);
+ event ((W)w, EV_SIGNAL);
}
}
if (ev_method)
{
- evw_init (&sigev, sigcb, 0);
+ evw_init (&sigev, sigcb);
siginit ();
}
void ev_prefork (void)
{
+ /* nop */
}
void ev_postfork_parent (void)
{
+ /* nop */
}
void ev_postfork_child (void)
}
static void
-timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)
+timers_reify ()
{
while (timercnt && timers [0]->at <= now)
{
/* first reschedule or stop timer */
if (w->repeat)
{
- if (w->is_abs)
- w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
- else
- w->at = now + w->repeat;
+ w->at = now + w->repeat;
+ assert (("timer timeout in the past, negative repeat?", w->at > now));
+ downheap ((WT *)timers, timercnt, 0);
+ }
+ else
+ evtimer_stop (w); /* nonrepeating: stop timer */
- assert (w->at > now);
+ event ((W)w, EV_TIMEOUT);
+ }
+}
- downheap (timers, timercnt, 0);
+static void
+periodics_reify ()
+{
+ while (periodiccnt && periodics [0]->at <= ev_now)
+ {
+ struct ev_periodic *w = periodics [0];
+
+ /* first reschedule or stop timer */
+ if (w->interval)
+ {
+ w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;
+ assert (("periodic timeout in the past, negative interval?", w->at > ev_now));
+ downheap ((WT *)periodics, periodiccnt, 0);
}
else
+ evperiodic_stop (w); /* nonrepeating: stop timer */
+
+ event ((W)w, EV_TIMEOUT);
+ }
+}
+
+static void
+periodics_reschedule (ev_tstamp diff)
+{
+ int i;
+
+ /* adjust periodics after time jump */
+ for (i = 0; i < periodiccnt; ++i)
+ {
+ struct ev_periodic *w = periodics [i];
+
+ if (w->interval)
{
- evtimer_stop (w); /* nonrepeating: stop timer */
- --timercnt; /* maybe pass by reference instead? */
- }
+ ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;
+
+ if (fabs (diff) >= 1e-4)
+ {
+ evperiodic_stop (w);
+ evperiodic_start (w);
- event ((struct ev_watcher *)w, EV_TIMEOUT);
+ i = 0; /* restart loop, inefficient, but time jumps should be rare */
+ }
+ }
}
}
time_update ()
{
int i;
+
ev_now = ev_time ();
if (have_monotonic)
{
ev_tstamp odiff = diff;
- /* detecting time jumps is much more difficult */
- for (i = 2; --i; ) /* loop a few times, before making important decisions */
+ for (i = 4; --i; ) /* loop a few times, before making important decisions */
{
now = get_clock ();
diff = ev_now - now;
ev_now = ev_time ();
}
- /* time jump detected, reschedule atimers */
- for (i = 0; i < atimercnt; ++i)
- {
- struct ev_timer *w = atimers [i];
- w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
- }
+ periodics_reschedule (diff - odiff);
+ /* no timer adjustment, as the monotonic clock doesn't jump */
}
else
{
if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
- /* time jump detected, adjust rtimers */
- for (i = 0; i < rtimercnt; ++i)
- rtimers [i]->at += ev_now - now;
+ {
+ periodics_reschedule (ev_now - now);
+
+ /* adjust timers. this is easy, as the offset is the same for all */
+ for (i = 0; i < timercnt; ++i)
+ timers [i]->at += diff;
+ }
now = ev_now;
}
void ev_loop (int flags)
{
double block;
- ev_loop_done = flags & EVLOOP_ONESHOT;
+ ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
if (checkcnt)
{
- queue_events (checks, checkcnt, EV_CHECK);
+ queue_events ((W *)checks, checkcnt, EV_CHECK);
call_pending ();
}
fd_reify ();
/* calculate blocking time */
+
+ /* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */
+ ev_now = ev_time ();
+
if (flags & EVLOOP_NONBLOCK || idlecnt)
block = 0.;
else
{
block = MAX_BLOCKTIME;
- if (rtimercnt)
+ if (timercnt)
{
- ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;
+ ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;
if (block > to) block = to;
}
- if (atimercnt)
+ if (periodiccnt)
{
- ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;
+ ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
if (block > to) block = to;
}
time_update ();
/* queue pending timers and reschedule them */
- /* absolute timers first */
- timers_reify (atimers, atimercnt, ev_now);
- /* relative timers second */
- timers_reify (rtimers, rtimercnt, now);
+ periodics_reify (); /* absolute timers first */
+ timers_reify (); /* relative timers second */
/* queue idle watchers unless io or timers are pending */
if (!pendingcnt)
- queue_events (idles, idlecnt, EV_IDLE);
+ queue_events ((W *)idles, idlecnt, EV_IDLE);
/* queue check and possibly idle watchers */
- queue_events (checks, checkcnt, EV_CHECK);
+ queue_events ((W *)checks, checkcnt, EV_CHECK);
call_pending ();
}
while (!ev_loop_done);
+
+ if (ev_loop_done != 2)
+ ev_loop_done = 0;
}
/*****************************************************************************/
static void
-wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)
+wlist_add (WL *head, WL elem)
{
elem->next = *head;
*head = elem;
}
static void
-wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)
+wlist_del (WL *head, WL elem)
{
while (*head)
{
}
static void
-ev_start (struct ev_watcher *w, int active)
+ev_start (W w, int active)
{
w->pending = 0;
w->active = active;
}
static void
-ev_stop (struct ev_watcher *w)
+ev_stop (W w)
{
if (w->pending)
pendings [w->pending - 1].w = 0;
w->active = 0;
- /* nop */
}
/*****************************************************************************/
int fd = w->fd;
- ev_start ((struct ev_watcher *)w, 1);
+ ev_start ((W)w, 1);
array_needsize (anfds, anfdmax, fd + 1, anfds_init);
- wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);
+ wlist_add ((WL *)&anfds[fd].head, (WL)w);
++fdchangecnt;
array_needsize (fdchanges, fdchangemax, fdchangecnt, );
if (!ev_is_active (w))
return;
- wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);
- ev_stop ((struct ev_watcher *)w);
+ wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
+ ev_stop ((W)w);
++fdchangecnt;
array_needsize (fdchanges, fdchangemax, fdchangecnt, );
fdchanges [fdchangecnt - 1] = w->fd;
}
+
void
evtimer_start (struct ev_timer *w)
{
if (ev_is_active (w))
return;
- if (w->is_abs)
- {
- /* this formula differs from the one in timer_reify becuse we do not round up */
- if (w->repeat)
- w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
-
- ev_start ((struct ev_watcher *)w, ++atimercnt);
- array_needsize (atimers, atimermax, atimercnt, );
- atimers [atimercnt - 1] = w;
- upheap (atimers, atimercnt - 1);
- }
- else
- {
- w->at += now;
+ w->at += now;
- ev_start ((struct ev_watcher *)w, ++rtimercnt);
- array_needsize (rtimers, rtimermax, rtimercnt, );
- rtimers [rtimercnt - 1] = w;
- upheap (rtimers, rtimercnt - 1);
- }
+ assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));
+ ev_start ((W)w, ++timercnt);
+ array_needsize (timers, timermax, timercnt, );
+ timers [timercnt - 1] = w;
+ upheap ((WT *)timers, timercnt - 1);
}
void
if (!ev_is_active (w))
return;
- if (w->is_abs)
+ if (w->active < timercnt--)
{
- if (w->active < atimercnt--)
- {
- atimers [w->active - 1] = atimers [atimercnt];
- downheap (atimers, atimercnt, w->active - 1);
- }
+ timers [w->active - 1] = timers [timercnt];
+ downheap ((WT *)timers, timercnt, w->active - 1);
}
- else
+
+ w->at = w->repeat;
+
+ ev_stop ((W)w);
+}
+
+void
+evtimer_again (struct ev_timer *w)
+{
+ if (ev_is_active (w))
{
- if (w->active < rtimercnt--)
+ if (w->repeat)
{
- rtimers [w->active - 1] = rtimers [rtimercnt];
- downheap (rtimers, rtimercnt, w->active - 1);
+ w->at = now + w->repeat;
+ downheap ((WT *)timers, timercnt, w->active - 1);
}
+ else
+ evtimer_stop (w);
}
+ else if (w->repeat)
+ evtimer_start (w);
+}
- ev_stop ((struct ev_watcher *)w);
+void
+evperiodic_start (struct ev_periodic *w)
+{
+ if (ev_is_active (w))
+ return;
+
+ assert (("periodic interval value less than zero not allowed", w->interval >= 0.));
+
+ /* this formula differs from the one in periodic_reify because we do not always round up */
+ if (w->interval)
+ w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
+
+ ev_start ((W)w, ++periodiccnt);
+ array_needsize (periodics, periodicmax, periodiccnt, );
+ periodics [periodiccnt - 1] = w;
+ upheap ((WT *)periodics, periodiccnt - 1);
+}
+
+void
+evperiodic_stop (struct ev_periodic *w)
+{
+ if (!ev_is_active (w))
+ return;
+
+ if (w->active < periodiccnt--)
+ {
+ periodics [w->active - 1] = periodics [periodiccnt];
+ downheap ((WT *)periodics, periodiccnt, w->active - 1);
+ }
+
+ ev_stop ((W)w);
}
void
if (ev_is_active (w))
return;
- ev_start ((struct ev_watcher *)w, 1);
+ ev_start ((W)w, 1);
array_needsize (signals, signalmax, w->signum, signals_init);
- wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);
+ wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
if (!w->next)
{
if (!ev_is_active (w))
return;
- wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);
- ev_stop ((struct ev_watcher *)w);
+ wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
+ ev_stop ((W)w);
if (!signals [w->signum - 1].head)
signal (w->signum, SIG_DFL);
if (ev_is_active (w))
return;
- ev_start ((struct ev_watcher *)w, ++idlecnt);
+ ev_start ((W)w, ++idlecnt);
array_needsize (idles, idlemax, idlecnt, );
idles [idlecnt - 1] = w;
}
void evidle_stop (struct ev_idle *w)
{
idles [w->active - 1] = idles [--idlecnt];
- ev_stop ((struct ev_watcher *)w);
+ ev_stop ((W)w);
}
void evcheck_start (struct ev_check *w)
if (ev_is_active (w))
return;
- ev_start ((struct ev_watcher *)w, ++checkcnt);
+ ev_start ((W)w, ++checkcnt);
array_needsize (checks, checkmax, checkcnt, );
checks [checkcnt - 1] = w;
}
void evcheck_stop (struct ev_check *w)
{
checks [w->active - 1] = checks [--checkcnt];
- ev_stop ((struct ev_watcher *)w);
+ ev_stop ((W)w);
}
/*****************************************************************************/
-#if 1
+
+#if 0
+
+struct ev_io wio;
static void
sin_cb (struct ev_io *w, int revents)
scb (struct ev_signal *w, int revents)
{
fprintf (stderr, "signal %x,%d\n", revents, w->signum);
+ evio_stop (&wio);
+ evio_start (&wio);
}
static void
gcb (struct ev_signal *w, int revents)
{
fprintf (stderr, "generic %x\n", revents);
+
}
int main (void)
{
- struct ev_io sin;
-
ev_init (0);
- evw_init (&sin, sin_cb, 55);
- evio_set (&sin, 0, EV_READ);
- evio_start (&sin);
+ evio_init (&wio, sin_cb, 0, EV_READ);
+ evio_start (&wio);
struct ev_timer t[10000];
{
struct ev_timer *w = t + i;
evw_init (w, ocb, i);
- evtimer_set_abs (w, drand48 (), 0.99775533);
+ evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
evtimer_start (w);
if (drand48 () < 0.5)
evtimer_stop (w);
#endif
struct ev_timer t1;
- evw_init (&t1, ocb, 0);
- evtimer_set_abs (&t1, 5, 10);
+ evtimer_init (&t1, ocb, 5, 10);
evtimer_start (&t1);
struct ev_signal sig;
- evw_init (&sig, scb, 65535);
- evsignal_set (&sig, SIGQUIT);
+ evsignal_init (&sig, scb, SIGQUIT);
evsignal_start (&sig);
struct ev_check cw;
- evw_init (&cw, gcb, 0);
+ evcheck_init (&cw, gcb);
evcheck_start (&cw);
struct ev_idle iw;
- evw_init (&iw, gcb, 0);
+ evidle_init (&iw, gcb);
evidle_start (&iw);
ev_loop (0);
projects / software / libev.git / blobdiff