+void
+ev_loop_destroy (EV_P)
+{
+ loop_destroy (EV_A);
+ ev_free (loop);
+}
+
+void
+ev_loop_fork (EV_P)
+{
+ postfork = 1;
+}
+
+#endif
+
+#if EV_MULTIPLICITY
+struct ev_loop default_loop_struct;
+static struct ev_loop *default_loop;
+
+struct ev_loop *
+#else
+static int default_loop;
+
+int
+#endif
+ev_default_loop (int methods)
+{
+ if (sigpipe [0] == sigpipe [1])
+ if (pipe (sigpipe))
+ return 0;
+
+ if (!default_loop)
+ {
+#if EV_MULTIPLICITY
+ struct ev_loop *loop = default_loop = &default_loop_struct;
+#else
+ default_loop = 1;
+#endif
+
+ loop_init (EV_A_ methods);
+
+ if (ev_method (EV_A))
+ {
+ siginit (EV_A);
+
+#ifndef WIN32
+ ev_signal_init (&childev, childcb, SIGCHLD);
+ ev_set_priority (&childev, EV_MAXPRI);
+ ev_signal_start (EV_A_ &childev);
+ ev_unref (EV_A); /* child watcher should not keep loop alive */
+#endif
+ }
+ else
+ default_loop = 0;
+ }
+
+ return default_loop;
+}
+
+void
+ev_default_destroy (void)
+{
+#if EV_MULTIPLICITY
+ struct ev_loop *loop = default_loop;
+#endif
+
+#ifndef WIN32
+ ev_ref (EV_A); /* child watcher */
+ ev_signal_stop (EV_A_ &childev);
+#endif
+
+ ev_ref (EV_A); /* signal watcher */
+ ev_io_stop (EV_A_ &sigev);
+
+ close (sigpipe [0]); sigpipe [0] = 0;
+ close (sigpipe [1]); sigpipe [1] = 0;
+
+ loop_destroy (EV_A);
+}
+
+void
+ev_default_fork (void)
+{
+#if EV_MULTIPLICITY
+ struct ev_loop *loop = default_loop;
+#endif
+
+ if (method)
+ postfork = 1;
+}
+
+/*****************************************************************************/
+
+static void
+call_pending (EV_P)
+{
+ int pri;
+
+ for (pri = NUMPRI; pri--; )
+ while (pendingcnt [pri])
+ {
+ ANPENDING *p = pendings [pri] + --pendingcnt [pri];
+
+ if (p->w)
+ {
+ p->w->pending = 0;
+ p->w->cb (EV_A_ p->w, p->events);
+ }
+ }
+}
+
+static void
+timers_reify (EV_P)
+{
+ while (timercnt && ((WT)timers [0])->at <= mn_now)
+ {
+ struct ev_timer *w = timers [0];
+
+ assert (("inactive timer on timer heap detected", ev_is_active (w)));
+
+ /* first reschedule or stop timer */
+ if (w->repeat)
+ {
+ assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
+ ((WT)w)->at = mn_now + w->repeat;
+ downheap ((WT *)timers, timercnt, 0);
+ }
+ else
+ ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
+
+ event (EV_A_ (W)w, EV_TIMEOUT);
+ }
+}
+
+static void
+periodics_reify (EV_P)
+{
+ while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
+ {
+ struct ev_periodic *w = periodics [0];
+
+ assert (("inactive timer on periodic heap detected", ev_is_active (w)));
+
+ /* first reschedule or stop timer */
+ if (w->interval)
+ {
+ ((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
+ assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
+ downheap ((WT *)periodics, periodiccnt, 0);
+ }
+ else
+ ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
+
+ event (EV_A_ (W)w, EV_PERIODIC);
+ }
+}
+
+static void
+periodics_reschedule (EV_P)
+{
+ int i;
+
+ /* adjust periodics after time jump */
+ for (i = 0; i < periodiccnt; ++i)
+ {
+ struct ev_periodic *w = periodics [i];
+
+ if (w->interval)
+ {
+ ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
+
+ if (fabs (diff) >= 1e-4)
+ {
+ ev_periodic_stop (EV_A_ w);
+ ev_periodic_start (EV_A_ w);
+
+ i = 0; /* restart loop, inefficient, but time jumps should be rare */
+ }
+ }
+ }
+}
+
+inline int
+time_update_monotonic (EV_P)
+{
+ mn_now = get_clock ();
+
+ if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
+ {
+ rt_now = rtmn_diff + mn_now;
+ return 0;
+ }
+ else
+ {
+ now_floor = mn_now;
+ rt_now = ev_time ();
+ return 1;
+ }
+}
+
+static void
+time_update (EV_P)
+{
+ int i;
+
+#if EV_USE_MONOTONIC
+ if (expect_true (have_monotonic))
+ {
+ if (time_update_monotonic (EV_A))
+ {
+ ev_tstamp odiff = rtmn_diff;
+
+ for (i = 4; --i; ) /* loop a few times, before making important decisions */
+ {
+ rtmn_diff = rt_now - mn_now;
+
+ if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
+ return; /* all is well */
+
+ rt_now = ev_time ();
+ mn_now = get_clock ();
+ now_floor = mn_now;
+ }
+
+ periodics_reschedule (EV_A);
+ /* no timer adjustment, as the monotonic clock doesn't jump */
+ /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
+ }
projects / software / libev.git / blobdiff