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

Comparing libev/ev.c (file contents):
Revision 1.153 by root, Wed Nov 28 11:41:18 2007 UTC vs.
Revision 1.163 by root, Wed Dec 5 13:54:36 2007 UTC

       perror (msg);
       abort ();
     }
 }
-static void *(*alloc)(void *ptr, size_t size) = realloc;
+static void *(*alloc)(void *ptr, long size);
 void
-ev_set_allocator (void *(*cb)(void *ptr, size_t size))
+ev_set_allocator (void *(*cb)(void *ptr, long size))
 {
   alloc = cb;
 }
 inline_speed void *
-ev_realloc (void *ptr, size_t size)
+ev_realloc (void *ptr, long size)
 {
-  ptr = alloc (ptr, size);
+  ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
   if (!ptr && size)
     {
-      fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", (long)size);
+      fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
       abort ();
     }
   return ptr;
 }
 {
   W w;
   int events;
 } ANPENDING;
+#if EV_USE_INOTIFY
 typedef struct
 {
-#if EV_USE_INOTIFY
   WL head;
-#endif
 } ANFS;
+#endif
 #if EV_MULTIPLICITY
   struct ev_loop
   {
 {
   return ev_rt_now;
 }
 #endif
-#define array_roundsize(type,n) (((n) | 4) & ~3)
+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 (elem * ncur > 4096)
+    {
+      ncur *= elem;
+      ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
+      ncur = ncur - sizeof (void *) * 4;
+      ncur /= elem;
+    }
+  return ncur;
+}
+inline_speed void *
+array_realloc (int elem, void *base, int *cur, int cnt)
+{
+  *cur = array_nextsize (elem, *cur, cnt);
+  return ev_realloc (base, elem * *cur);
+}
 #define array_needsize(type,base,cur,cnt,init)			\
-  if (expect_false ((cnt) > cur))				\
+  if (expect_false ((cnt) > (cur)))				\
     {								\
-      int newcnt = cur;						\
+      int ocur_ = (cur);					\
-      do							\
+      (base) = (type *)array_realloc				\
-        {							\
+         (sizeof (type), (base), &(cur), (cnt));		\
-          newcnt = array_roundsize (type, newcnt << 1);		\
+      init ((base) + (ocur_), (cur) - ocur_);			\
-        }							\
-      while ((cnt) > newcnt);					\
-      								\
-      base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
-      init (base + cur, newcnt - cur);				\
-      cur = newcnt;						\
     }
+#if 0
 #define array_slim(type,stem)					\
   if (stem ## max < array_roundsize (stem ## cnt >> 2))		\
     {								\
       stem ## max = array_roundsize (stem ## cnt >> 1);		\
       base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
       fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
     }
+#endif
 #define array_free(stem, idx) \
   ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
 /*****************************************************************************/
 static void noinline
 fd_rearm_all (EV_P)
 {
   int fd;
-  /* this should be highly optimised to not do anything but set a flag */
   for (fd = 0; fd < anfdmax; ++fd)
     if (anfds [fd].events)
       {
         anfds [fd].events = 0;
         fd_change (EV_A_ fd);
 ev_backend (EV_P)
 {
   return backend;
 }
+unsigned int
+ev_loop_count (EV_P)
+{
+  return loop_count;
+}
 static void noinline
 loop_init (EV_P_ unsigned int flags)
 {
   if (!backend)
     {
       ev_rt_now = ev_time ();
       mn_now    = get_clock ();
       now_floor = mn_now;
       rtmn_diff = ev_rt_now - mn_now;
+      /* pid check not overridable via env */
+#ifndef _WIN32
+      if (flags & EVFLAG_FORKCHECK)
+        curpid = getpid ();
+#endif
       if (!(flags & EVFLAG_NOENV)
           && !enable_secure ()
           && getenv ("LIBEV_FLAGS"))
         flags = atoi (getenv ("LIBEV_FLAGS"));
   array_free (check, EMPTY0);
   backend = 0;
 }
+void inline_size infy_fork (EV_P);
 void inline_size
 loop_fork (EV_P)
 {
 #if EV_USE_PORT
   if (backend == EVBACKEND_PORT  ) port_fork   (EV_A);
 #if EV_USE_KQUEUE
   if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
 #endif
 #if EV_USE_EPOLL
   if (backend == EVBACKEND_EPOLL ) epoll_fork  (EV_A);
+#endif
+#if EV_USE_INOTIFY
+  infy_fork (EV_A);
 #endif
   if (ev_is_active (&sigev))
     {
       /* default loop */
           ev_tstamp odiff = rtmn_diff;
           /* loop a few times, before making important decisions.
            * on the choice of "4": one iteration isn't enough,
            * in case we get preempted during the calls to
-           * ev_time and get_clock. a second call is almost guarenteed
+           * ev_time and get_clock. a second call is almost guaranteed
            * to succeed in that case, though. and looping a few more times
            * doesn't hurt either as we only do this on time-jumps or
-           * in the unlikely event of getting preempted here.
+           * in the unlikely event of having been preempted here.
            */
           for (i = 4; --i; )
             {
               rtmn_diff = ev_rt_now - mn_now;
         {
 #if EV_PERIODIC_ENABLE
           periodics_reschedule (EV_A);
 #endif
-          /* adjust timers. this is easy, as the offset is the same for all */
+          /* adjust timers. this is easy, as the offset is the same for all of them */
           for (i = 0; i < timercnt; ++i)
             ((WT)timers [i])->at += ev_rt_now - mn_now;
         }
       mn_now = ev_rt_now;
 {
   loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
             ? EVUNLOOP_ONE
             : EVUNLOOP_CANCEL;
-  while (activecnt)
+  call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
+  do
     {
-      /* we might have forked, so reify kernel state if necessary */
+#ifndef _WIN32
+      if (expect_false (curpid)) /* penalise the forking check even more */
+        if (expect_false (getpid () != curpid))
+          {
+            curpid = getpid ();
+            postfork = 1;
+          }
+#endif
-      #if EV_FORK_ENABLE
+#if EV_FORK_ENABLE
+      /* we might have forked, so queue fork handlers */
-        if (expect_false (postfork))
+      if (expect_false (postfork))
-          if (forkcnt)
+        if (forkcnt)
-            {
+          {
-              queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
+            queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
-              call_pending (EV_A);
+            call_pending (EV_A);
-            }
+          }
-      #endif
+#endif
       /* queue check watchers (and execute them) */
       if (expect_false (preparecnt))
         {
           queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
           call_pending (EV_A);
         }
+      if (expect_false (!activecnt))
+        break;
       /* we might have forked, so reify kernel state if necessary */
       if (expect_false (postfork))
         loop_fork (EV_A);
       /* update fd-related kernel structures */
       fd_reify (EV_A);
       /* calculate blocking time */
       {
-        double block;
+        ev_tstamp block;
-        if (flags & EVLOOP_NONBLOCK || idlecnt)
+        if (expect_false (flags & EVLOOP_NONBLOCK || idlecnt || !activecnt))
           block = 0.; /* do not block at all */
         else
           {
             /* update time to cancel out callback processing overhead */
 #if EV_USE_MONOTONIC
 #endif
             if (expect_false (block < 0.)) block = 0.;
           }
+        ++loop_count;
         backend_poll (EV_A_ block);
       }
       /* update ev_rt_now, do magic */
       time_update (EV_A);
       if (expect_false (checkcnt))
         queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
       call_pending (EV_A);
-      if (expect_false (loop_done))
-        break;
     }
+  while (expect_true (activecnt && !loop_done));
   if (loop_done == EVUNLOOP_ONE)
     loop_done = EVUNLOOP_CANCEL;
 }
 # endif
 #define DEF_STAT_INTERVAL 5.0074891
 #define MIN_STAT_INTERVAL 0.1074891
-void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
+static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
 #if EV_USE_INOTIFY
 # define EV_INOTIFY_BUFSIZE 8192
 static void noinline
       ev_set_priority (&fs_w, EV_MAXPRI);
       ev_io_start (EV_A_ &fs_w);
     }
 }
+void inline_size
+infy_fork (EV_P)
+{
+  int slot;
+  if (fs_fd < 0)
+    return;
+  close (fs_fd);
+  fs_fd = inotify_init ();
+  for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
+    {
+      WL w_ = fs_hash [slot].head;
+      fs_hash [slot].head = 0;
+      while (w_)
+        {
+          ev_stat *w = (ev_stat *)w_;
+          w_ = w_->next; /* lets us add this watcher */
+          w->wd = -1;
+          if (fs_fd >= 0)
+            infy_add (EV_A_ w); /* re-add, no matter what */
+          else
+            ev_timer_start (EV_A_ &w->timer);
+        }
+    }
+}
 #endif
 void
 ev_stat_stat (EV_P_ ev_stat *w)
 {
     w->attr.st_nlink = 0;
   else if (!w->attr.st_nlink)
     w->attr.st_nlink = 1;
 }
-void noinline
+static void noinline
 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
 {
   ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
   /* we copy this here each the time so that */
   /* prev has the old value when the callback gets invoked */
   w->prev = w->attr;
   ev_stat_stat (EV_A_ w);
-  if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
+  /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
+  if (
+    w->prev.st_dev      != w->attr.st_dev
+    || w->prev.st_ino   != w->attr.st_ino
+    || w->prev.st_mode  != w->attr.st_mode
+    || w->prev.st_nlink != w->attr.st_nlink
+    || w->prev.st_uid   != w->attr.st_uid
+    || w->prev.st_gid   != w->attr.st_gid
+    || w->prev.st_rdev  != w->attr.st_rdev
+    || w->prev.st_size  != w->attr.st_size
+    || w->prev.st_atime != w->attr.st_atime
+    || w->prev.st_mtime != w->attr.st_mtime
+    || w->prev.st_ctime != w->attr.st_ctime
-    {
+  ) {
       #if EV_USE_INOTIFY
         infy_del (EV_A_ w);
         infy_add (EV_A_ w);
         ev_stat_stat (EV_A_ w); /* avoid race... */
       #endif

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Comparing libev/ev.c (file contents): Revision 1.153 by root, Wed Nov 28 11:41:18 2007 UTC vs. Revision 1.163 by root, Wed Dec 5 13:54:36 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.153 by root, Wed Nov 28 11:41:18 2007 UTC vs.
Revision 1.163 by root, Wed Dec 5 13:54:36 2007 UTC