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

Comparing libev/ev.c (file contents):
Revision 1.228 by root, Fri May 2 08:07:37 2008 UTC vs.
Revision 1.234 by root, Tue May 6 23:42:16 2008 UTC

 typedef ev_watcher *W;
 typedef ev_watcher_list *WL;
 typedef ev_watcher_time *WT;
+#define ev_active(w) ((W)(w))->active
 #define ev_at(w) ((WT)(w))->at
 #if EV_USE_MONOTONIC
 /* sig_atomic_t is used to avoid per-thread variables or locking but still */
 /* giving it a reasonably high chance of working on typical architetcures */
     }
 }
 /*****************************************************************************/
+#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
 int inline_size
 array_nextsize (int elem, int cur, int cnt)
 {
   int ncur = cur + 1;
   do
     ncur <<= 1;
   while (cnt > ncur);
-  /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
+  /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
-  if (elem * ncur > 4096)
+  if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
     {
       ncur *= elem;
-      ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
+      ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
       ncur = ncur - sizeof (void *) * 4;
       ncur /= elem;
     }
   return ncur;
       /* maybe we could use a dummy element at heap [0]? */
       if (!p || heap [p]->at <= w->at)
         break;
       heap [k] = heap [p];
-      ((W)heap [k])->active = k;
+      ev_active (heap [k]) = k;
       k = p;
     }
   heap [k] = w;
-  ((W)heap [k])->active = k;
+  ev_active (heap [k]) = k;
 }
 /* away from the root */
 void inline_speed
 downheap (WT *heap, int N, int k)
       if (w->at <= heap [c]->at)
         break;
       heap [k] = heap [c];
-      ((W)heap [k])->active = k;
+      ev_active (heap [k]) = k;
       k = c;
     }
   heap [k] = w;
-  ((W)heap [k])->active = k;
+  ev_active (heap [k]) = k;
 }
 void inline_size
 adjustheap (WT *heap, int N, int k)
 {
 pipecb (EV_P_ ev_io *iow, int revents)
 {
 #if EV_USE_EVENTFD
   if (evfd >= 0)
     {
-      uint64_t counter = 1;
+      uint64_t counter;
       read (evfd, &counter, sizeof (uint64_t));
     }
   else
 #endif
     {
 void
 ev_loop_fork (EV_P)
 {
   postfork = 1; /* must be in line with ev_default_fork */
 }
 #endif
 #if EV_MULTIPLICITY
 struct ev_loop *
 ev_default_loop_init (unsigned int flags)
             p->w->pending = 0;
             EV_CB_INVOKE (p->w, p->events);
           }
       }
 }
+#if EV_IDLE_ENABLE
+void inline_size
+idle_reify (EV_P)
+{
+  if (expect_false (idleall))
+    {
+      int pri;
+      for (pri = NUMPRI; pri--; )
+        {
+          if (pendingcnt [pri])
+            break;
+          if (idlecnt [pri])
+            {
+              queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
+              break;
+            }
+        }
+    }
+}
+#endif
 void inline_size
 timers_reify (EV_P)
 {
   while (timercnt && ev_at (timers [1]) <= mn_now)
 periodics_reschedule (EV_P)
 {
   int i;
   /* adjust periodics after time jump */
-  for (i = 0; i < periodiccnt; ++i)
+  for (i = 1; i <= periodiccnt; ++i)
     {
       ev_periodic *w = (ev_periodic *)periodics [i];
       if (w->reschedule_cb)
         ev_at (w) = w->reschedule_cb (w, ev_rt_now);
     }
   /* now rebuild the heap */
   for (i = periodiccnt >> 1; i--; )
     downheap (periodics, periodiccnt, i);
-}
-#endif
-#if EV_IDLE_ENABLE
-void inline_size
-idle_reify (EV_P)
-{
-  if (expect_false (idleall))
-    {
-      int pri;
-      for (pri = NUMPRI; pri--; )
-        {
-          if (pendingcnt [pri])
-            break;
-          if (idlecnt [pri])
-            {
-              queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
-              break;
-            }
-        }
-    }
 }
 #endif
 void inline_speed
 time_update (EV_P_ ev_tstamp max_block)
        */
       for (i = 4; --i; )
         {
           rtmn_diff = ev_rt_now - mn_now;
-          if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
+          if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
             return; /* all is well */
           ev_rt_now = ev_time ();
           mn_now    = get_clock ();
           now_floor = mn_now;
   ev_start (EV_A_ (W)w, ++timercnt);
   array_needsize (WT, timers, timermax, timercnt + 1, EMPTY2);
   timers [timercnt] = (WT)w;
   upheap (timers, timercnt);
-  /*assert (("internal timer heap corruption", timers [((W)w)->active] == w));*/
+  /*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
 }
 void noinline
 ev_timer_stop (EV_P_ ev_timer *w)
 {
   clear_pending (EV_A_ (W)w);
   if (expect_false (!ev_is_active (w)))
     return;
-  assert (("internal timer heap corruption", timers [((W)w)->active] == (WT)w));
   {
-    int active = ((W)w)->active;
+    int active = ev_active (w);
+    assert (("internal timer heap corruption", timers [active] == (WT)w));
     if (expect_true (active < timercnt))
       {
         timers [active] = timers [timercnt];
         adjustheap (timers, timercnt, active);
   if (ev_is_active (w))
     {
       if (w->repeat)
         {
           ev_at (w) = mn_now + w->repeat;
-          adjustheap (timers, timercnt, ((W)w)->active);
+          adjustheap (timers, timercnt, ev_active (w));
         }
       else
         ev_timer_stop (EV_A_ w);
     }
   else if (w->repeat)
     {
-      w->at = w->repeat;
+      ev_at (w) = w->repeat;
       ev_timer_start (EV_A_ w);
     }
 }
 #if EV_PERIODIC_ENABLE
   ev_start (EV_A_ (W)w, ++periodiccnt);
   array_needsize (WT, periodics, periodicmax, periodiccnt + 1, EMPTY2);
   periodics [periodiccnt] = (WT)w;
   upheap (periodics, periodiccnt);
-  /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
+  /*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
 }
 void noinline
 ev_periodic_stop (EV_P_ ev_periodic *w)
 {
   clear_pending (EV_A_ (W)w);
   if (expect_false (!ev_is_active (w)))
     return;
-  assert (("internal periodic heap corruption", periodics [((W)w)->active] == (WT)w));
   {
-    int active = ((W)w)->active;
+    int active = ev_active (w);
+    assert (("internal periodic heap corruption", periodics [active] == (WT)w));
     if (expect_true (active < periodiccnt))
       {
         periodics [active] = periodics [periodiccnt];
         adjustheap (periodics, periodiccnt, active);
   if (w->wd < 0)
     {
       ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
       /* monitor some parent directory for speedup hints */
+      /* note that exceeding the hardcoded limit is not a correctness issue, */
+      /* but an efficiency issue only */
       if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
         {
           char path [4096];
           strcpy (path, w->path);
   clear_pending (EV_A_ (W)w);
   if (expect_false (!ev_is_active (w)))
     return;
   {
-    int active = ((W)w)->active;
+    int active = ev_active (w);
     idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
-    ((W)idles [ABSPRI (w)][active - 1])->active = active;
+    ev_active (idles [ABSPRI (w)][active - 1]) = active;
     ev_stop (EV_A_ (W)w);
     --idleall;
   }
 }
   clear_pending (EV_A_ (W)w);
   if (expect_false (!ev_is_active (w)))
     return;
   {
-    int active = ((W)w)->active;
+    int active = ev_active (w);
     prepares [active - 1] = prepares [--preparecnt];
-    ((W)prepares [active - 1])->active = active;
+    ev_active (prepares [active - 1]) = active;
   }
   ev_stop (EV_A_ (W)w);
 }
   clear_pending (EV_A_ (W)w);
   if (expect_false (!ev_is_active (w)))
     return;
   {
-    int active = ((W)w)->active;
+    int active = ev_active (w);
     checks [active - 1] = checks [--checkcnt];
-    ((W)checks [active - 1])->active = active;
+    ev_active (checks [active - 1]) = active;
   }
   ev_stop (EV_A_ (W)w);
 }
   clear_pending (EV_A_ (W)w);
   if (expect_false (!ev_is_active (w)))
     return;
   {
-    int active = ((W)w)->active;
+    int active = ev_active (w);
     forks [active - 1] = forks [--forkcnt];
-    ((W)forks [active - 1])->active = active;
+    ev_active (forks [active - 1]) = active;
   }
   ev_stop (EV_A_ (W)w);
 }
 #endif
   clear_pending (EV_A_ (W)w);
   if (expect_false (!ev_is_active (w)))
     return;
   {
-    int active = ((W)w)->active;
+    int active = ev_active (w);
     asyncs [active - 1] = asyncs [--asynccnt];
-    ((W)asyncs [active - 1])->active = active;
+    ev_active (asyncs [active - 1]) = active;
   }
   ev_stop (EV_A_ (W)w);
 }

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Comparing libev/ev.c (file contents): Revision 1.228 by root, Fri May 2 08:07:37 2008 UTC vs. Revision 1.234 by root, Tue May 6 23:42:16 2008 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.228 by root, Fri May 2 08:07:37 2008 UTC vs.
Revision 1.234 by root, Tue May 6 23:42:16 2008 UTC