[ViewVC] Diff of: cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.76 by root, Wed Nov 7 18:47:26 2007 UTC vs.
Revision 1.86 by root, Sat Nov 10 03:19:21 2007 UTC

 #define MIN_TIMEJUMP  1. /* minimum timejump that gets detected (if monotonic clock available) */
 #define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
 #define PID_HASHSIZE  16 /* size of pid hash table, must be power of two */
 /*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
+#ifdef EV_H
+# include EV_H
+#else
-#include "ev.h"
+# include "ev.h"
+#endif
 #if __GNUC__ >= 3
 # define expect(expr,value)         __builtin_expect ((expr),(value))
 # define inline                     inline
 #else
   int events;
 } ANPENDING;
 #if EV_MULTIPLICITY
-struct ev_loop
+  struct ev_loop
-{
+  {
+    ev_tstamp ev_rt_now;
-# define VAR(name,decl) decl;
+    #define VAR(name,decl) decl;
-# include "ev_vars.h"
+      #include "ev_vars.h"
-};
-# undef VAR
+    #undef VAR
+  };
-# include "ev_wrap.h"
+  #include "ev_wrap.h"
+  struct ev_loop default_loop_struct;
+  static struct ev_loop *default_loop;
 #else
+  ev_tstamp ev_rt_now;
-# define VAR(name,decl) static decl;
+  #define VAR(name,decl) static decl;
-# include "ev_vars.h"
+    #include "ev_vars.h"
-# undef VAR
+  #undef VAR
+  static int default_loop;
 #endif
 /*****************************************************************************/
 #endif
   return ev_time ();
 }
+#if EV_MULTIPLICITY
 ev_tstamp
 ev_now (EV_P)
 {
-  return rt_now;
+  return ev_rt_now;
 }
+#endif
 #define array_roundsize(type,n) ((n) | 4 & ~3)
 #define array_needsize(type,base,cur,cnt,init)			\
   if (expect_false ((cnt) > cur))				\
       ++base;
     }
 }
-static void
+void
-event (EV_P_ W w, int events)
+ev_feed_event (EV_P_ void *w, int revents)
 {
+  W w_ = (W)w;
-  if (w->pending)
+  if (w_->pending)
     {
-      pendings [ABSPRI (w)][w->pending - 1].events |= events;
+      pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
       return;
     }
-  w->pending = ++pendingcnt [ABSPRI (w)];
+  w_->pending = ++pendingcnt [ABSPRI (w_)];
-  array_needsize (ANPENDING, pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void));
+  array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
-  pendings [ABSPRI (w)][w->pending - 1].w      = w;
+  pendings [ABSPRI (w_)][w_->pending - 1].w      = w_;
-  pendings [ABSPRI (w)][w->pending - 1].events = events;
+  pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
 }
 static void
 queue_events (EV_P_ W *events, int eventcnt, int type)
 {
   int i;
   for (i = 0; i < eventcnt; ++i)
-    event (EV_A_ events [i], type);
+    ev_feed_event (EV_A_ events [i], type);
 }
-static void
+inline void
-fd_event (EV_P_ int fd, int events)
+fd_event (EV_P_ int fd, int revents)
 {
   ANFD *anfd = anfds + fd;
   struct ev_io *w;
   for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
     {
-      int ev = w->events & events;
+      int ev = w->events & revents;
       if (ev)
-        event (EV_A_ (W)w, ev);
+        ev_feed_event (EV_A_ (W)w, ev);
     }
+}
+void
+ev_feed_fd_event (EV_P_ int fd, int revents)
+{
+  fd_event (EV_A_ fd, revents);
 }
 /*****************************************************************************/
 static void
   struct ev_io *w;
   while ((w = (struct ev_io *)anfds [fd].head))
     {
       ev_io_stop (EV_A_ w);
-      event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
+      ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
     }
 }
 static int
 fd_valid (int fd)
   heap [k] = w;
   ((W)heap [k])->active = k + 1;
 }
+inline void
+adjustheap (WT *heap, int N, int k, ev_tstamp at)
+{
+  ev_tstamp old_at = heap [k]->at;
+  heap [k]->at = at;
+  if (old_at < at)
+    downheap (heap, N, k);
+  else
+    upheap (heap, k);
+}
 /*****************************************************************************/
 typedef struct
 {
   WL head;
 #endif
       errno = old_errno;
     }
 }
+void
+ev_feed_signal_event (EV_P_ int signum)
+{
+  WL w;
+#if EV_MULTIPLICITY
+  assert (("feeding signal events is only supported in the default loop", loop == default_loop));
+#endif
+  --signum;
+  if (signum < 0 || signum >= signalmax)
+    return;
+  signals [signum].gotsig = 0;
+  for (w = signals [signum].head; w; w = w->next)
+    ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
+}
 static void
 sigcb (EV_P_ struct ev_io *iow, int revents)
 {
-  WL w;
   int signum;
 #ifdef WIN32
   recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
 #else
 #endif
   gotsig = 0;
   for (signum = signalmax; signum--; )
     if (signals [signum].gotsig)
-      {
+      ev_feed_signal_event (EV_A_ signum + 1);
-        signals [signum].gotsig = 0;
-        for (w = signals [signum].head; w; w = w->next)
-          event (EV_A_ (W)w, EV_SIGNAL);
-      }
 }
 static void
 siginit (EV_P)
 {
     if (w->pid == pid || !w->pid)
       {
         ev_priority (w) = ev_priority (sw); /* need to do it *now* */
         w->rpid         = pid;
         w->rstatus      = status;
-        event (EV_A_ (W)w, EV_CHILD);
+        ev_feed_event (EV_A_ (W)w, EV_CHILD);
       }
 }
 static void
 childcb (EV_P_ struct ev_signal *sw, int revents)
   int pid, status;
   if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
     {
       /* make sure we are called again until all childs have been reaped */
-      event (EV_A_ (W)sw, EV_SIGNAL);
+      ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
       child_reap (EV_A_ sw, pid, pid, status);
       child_reap (EV_A_ sw,   0, pid, status); /* this might trigger a watcher twice, but event catches that */
     }
 }
         if (!clock_gettime (CLOCK_MONOTONIC, &ts))
           have_monotonic = 1;
       }
 #endif
-      rt_now    = ev_time ();
+      ev_rt_now = ev_time ();
       mn_now    = get_clock ();
       now_floor = mn_now;
-      rtmn_diff = rt_now - mn_now;
+      rtmn_diff = ev_rt_now - mn_now;
       if (methods == EVMETHOD_AUTO)
         if (!enable_secure () && getenv ("LIBEV_METHODS"))
           methods = atoi (getenv ("LIBEV_METHODS"));
         else
 #endif
 #if EV_USE_SELECT
       if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
 #endif
-      ev_watcher_init (&sigev, sigcb);
+      ev_init (&sigev, sigcb);
       ev_set_priority (&sigev, EV_MAXPRI);
     }
 }
 void
 }
 #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])
         ANPENDING *p = pendings [pri] + --pendingcnt [pri];
         if (p->w)
           {
             p->w->pending = 0;
-            p->w->cb (EV_A_ p->w, p->events);
+            EV_CB_INVOKE (p->w, p->events);
           }
       }
 }
 static void
           downheap ((WT *)timers, timercnt, 0);
         }
       else
         ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
-      event (EV_A_ (W)w, EV_TIMEOUT);
+      ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
     }
 }
 static void
 periodics_reify (EV_P)
 {
-  while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
+  while (periodiccnt && ((WT)periodics [0])->at <= ev_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)
+      if (w->reschedule_cb)
         {
+          ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
+          assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
+          downheap ((WT *)periodics, periodiccnt, 0);
+        }
+      else if (w->interval)
+        {
-          ((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
+          ((WT)w)->at += floor ((ev_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));
+          assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
           downheap ((WT *)periodics, periodiccnt, 0);
         }
       else
         ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
-      event (EV_A_ (W)w, EV_PERIODIC);
+      ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
     }
 }
 static void
 periodics_reschedule (EV_P)
   /* adjust periodics after time jump */
   for (i = 0; i < periodiccnt; ++i)
     {
       struct ev_periodic *w = periodics [i];
+      if (w->reschedule_cb)
+        ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
-      if (w->interval)
+      else if (w->interval)
-        {
-          ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
+        ((WT)w)->at += ceil ((ev_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 */
-            }
-        }
     }
+  /* now rebuild the heap */
+  for (i = periodiccnt >> 1; i--; )
+    downheap ((WT *)periodics, periodiccnt, i);
 }
 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;
+      ev_rt_now = rtmn_diff + mn_now;
       return 0;
     }
   else
     {
       now_floor = mn_now;
-      rt_now = ev_time ();
+      ev_rt_now = ev_time ();
       return 1;
     }
 }
 static void
         {
           ev_tstamp odiff = rtmn_diff;
           for (i = 4; --i; ) /* loop a few times, before making important decisions */
             {
-              rtmn_diff = rt_now - mn_now;
+              rtmn_diff = ev_rt_now - mn_now;
               if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
                 return; /* all is well */
-              rt_now    = ev_time ();
+              ev_rt_now = ev_time ();
               mn_now    = get_clock ();
               now_floor = mn_now;
             }
           periodics_reschedule (EV_A);
         }
     }
   else
 #endif
     {
-      rt_now = ev_time ();
+      ev_rt_now = ev_time ();
-      if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
+      if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
         {
           periodics_reschedule (EV_A);
           /* adjust timers. this is easy, as the offset is the same for all */
           for (i = 0; i < timercnt; ++i)
-            ((WT)timers [i])->at += rt_now - mn_now;
+            ((WT)timers [i])->at += ev_rt_now - mn_now;
         }
-      mn_now = rt_now;
+      mn_now = ev_rt_now;
     }
 }
 void
 ev_ref (EV_P)
       if (expect_true (have_monotonic))
         time_update_monotonic (EV_A);
       else
 #endif
         {
-          rt_now = ev_time ();
+          ev_rt_now = ev_time ();
-          mn_now = rt_now;
+          mn_now    = ev_rt_now;
         }
       if (flags & EVLOOP_NONBLOCK || idlecnt)
         block = 0.;
       else
               if (block > to) block = to;
             }
           if (periodiccnt)
             {
-              ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
+              ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
               if (block > to) block = to;
             }
           if (block < 0.) block = 0.;
         }
       method_poll (EV_A_ block);
-      /* update rt_now, do magic */
+      /* update ev_rt_now, do magic */
       time_update (EV_A);
       /* queue pending timers and reschedule them */
       timers_reify (EV_A); /* relative timers called last */
       periodics_reify (EV_A); /* absolute timers called first */
 ev_timer_again (EV_P_ struct ev_timer *w)
 {
   if (ev_is_active (w))
     {
       if (w->repeat)
-        {
-          ((WT)w)->at = mn_now + w->repeat;
-          downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
+        adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1, mn_now + w->repeat);
-        }
       else
         ev_timer_stop (EV_A_ w);
     }
   else if (w->repeat)
     ev_timer_start (EV_A_ w);
 ev_periodic_start (EV_P_ struct ev_periodic *w)
 {
   if (ev_is_active (w))
     return;
+  if (w->reschedule_cb)
+    ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
+  else if (w->interval)
+    {
-  assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
+      assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
-  /* this formula differs from the one in periodic_reify because we do not always round up */
+      /* this formula differs from the one in periodic_reify because we do not always round up */
-  if (w->interval)
-    ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
+      ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
+    }
   ev_start (EV_A_ (W)w, ++periodiccnt);
   array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
   periodics [periodiccnt - 1] = w;
   upheap ((WT *)periodics, periodiccnt - 1);
       periodics [((W)w)->active - 1] = periodics [periodiccnt];
       downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
     }
   ev_stop (EV_A_ (W)w);
+}
+void
+ev_periodic_again (EV_P_ struct ev_periodic *w)
+{
+  /* TODO: use adjustheap and recalculation */
+  ev_periodic_stop (EV_A_ w);
+  ev_periodic_start (EV_A_ w);
 }
 void
 ev_idle_start (EV_P_ struct ev_idle *w)
 {
   else
     {
       once->cb  = cb;
       once->arg = arg;
-      ev_watcher_init (&once->io, once_cb_io);
+      ev_init (&once->io, once_cb_io);
       if (fd >= 0)
         {
           ev_io_set (&once->io, fd, events);
           ev_io_start (EV_A_ &once->io);
         }
-      ev_watcher_init (&once->to, once_cb_to);
+      ev_init (&once->to, once_cb_to);
       if (timeout >= 0.)
         {
           ev_timer_set (&once->to, timeout, 0.);
           ev_timer_start (EV_A_ &once->to);
         }

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Comparing libev/ev.c (file contents): Revision 1.76 by root, Wed Nov 7 18:47:26 2007 UTC vs. Revision 1.86 by root, Sat Nov 10 03:19:21 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.76 by root, Wed Nov 7 18:47:26 2007 UTC vs.
Revision 1.86 by root, Sat Nov 10 03:19:21 2007 UTC