*** empty log message ***

[software/libev.git] / ev.c

diff --git a/ev.c b/ev.c
index 5383e2cbbb8a7fb46a11f0e7da875d7ae37a76c6..48ff5753c63fe9b34c65f8caba40e0aa4ad6def9 100644 (file)
--- a/ev.c
+++ b/ev.c
@@ -243,9 +243,9 @@ extern "C" {
 #define expect_true(expr)  expect ((expr) != 0, 1)
 
 #define NUMPRI    (EV_MAXPRI - EV_MINPRI + 1)
 #define expect_true(expr)  expect ((expr) != 0, 1)
 
 #define NUMPRI    (EV_MAXPRI - EV_MINPRI + 1)

-#define ABSPRI(w) ((w)->priority - EV_MINPRI)
+#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)

 
 

-#define EMPTY0      /* required for microsofts broken pseudo-c compiler */
+#define EMPTY       /* required for microsofts broken pseudo-c compiler */

 #define EMPTY2(a,b) /* used to suppress some warnings */
 
 typedef ev_watcher *W;
 #define EMPTY2(a,b) /* used to suppress some warnings */
 
 typedef ev_watcher *W;


@@ -398,23 +398,44 @@ ev_now (EV_P)
 }
 #endif
 
 }
 #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)                 \
 
 #define array_needsize(type,base,cur,cnt,init)                 \

-  if (expect_false ((cnt) > cur))                              \
+  if (expect_false ((cnt) > (cur)))                            \

     {                                                          \
     {                                                          \

-      int newcnt = cur;                                                \
-      do                                                       \
-        {                                                      \
-          newcnt = array_roundsize (type, newcnt << 1);                \
-        }                                                      \
-      while ((cnt) > newcnt);                                  \
-                                                               \
-      base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
-      init (base + cur, newcnt - cur);                         \
-      cur = newcnt;                                            \
+      int ocur_ = (cur);                                       \
+      (base) = (type *)array_realloc                           \
+         (sizeof (type), (base), &(cur), (cnt));               \
+      init ((base) + (ocur_), (cur) - ocur_);                  \

     }
 
     }
 

+#if 0

 #define array_slim(type,stem)                                  \
   if (stem ## max < array_roundsize (stem ## cnt >> 2))                \
     {                                                          \
 #define array_slim(type,stem)                                  \
   if (stem ## max < array_roundsize (stem ## cnt >> 2))                \
     {                                                          \


@@ -422,6 +443,7 @@ ev_now (EV_P)
       base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
       fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
     }
       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;
 
 #define array_free(stem, idx) \
   ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;


@@ -591,7 +613,6 @@ fd_rearm_all (EV_P)
 {
   int fd;
 
 {
   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)
       {
   for (fd = 0; fd < anfdmax; ++fd)
     if (anfds [fd].events)
       {


@@ -767,9 +788,9 @@ child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
   for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
     if (w->pid == pid || !w->pid)
       {
   for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
     if (w->pid == pid || !w->pid)
       {

-        ev_priority (w) = ev_priority (sw); /* need to do it *now* */
-        w->rpid         = pid;
-        w->rstatus      = status;
+        ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
+        w->rpid    = pid;
+        w->rstatus = status;

         ev_feed_event (EV_A_ (W)w, EV_CHILD);
       }
 }
         ev_feed_event (EV_A_ (W)w, EV_CHILD);
       }
 }


@@ -889,6 +910,12 @@ ev_backend (EV_P)
   return backend;
 }
 
   return backend;
 }
 

+unsigned int
+ev_loop_count (EV_P)
+{
+  return loop_count;
+}
+

 static void noinline
 loop_init (EV_P_ unsigned int flags)
 {
 static void noinline
 loop_init (EV_P_ unsigned int flags)
 {


@@ -907,6 +934,12 @@ loop_init (EV_P_ unsigned int flags)
       now_floor = mn_now;
       rtmn_diff = ev_rt_now - mn_now;
 
       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"))
       if (!(flags & EVFLAG_NOENV)
           && !enable_secure ()
           && getenv ("LIBEV_FLAGS"))


@@ -972,17 +1005,21 @@ loop_destroy (EV_P)
 #endif
 
   for (i = NUMPRI; i--; )
 #endif
 
   for (i = NUMPRI; i--; )

-    array_free (pending, [i]);
+    {
+      array_free (pending, [i]);
+#if EV_IDLE_ENABLE
+      array_free (idle, [i]);
+#endif
+    }

 
   /* have to use the microsoft-never-gets-it-right macro */
 
   /* have to use the microsoft-never-gets-it-right macro */

-  array_free (fdchange, EMPTY0);
-  array_free (timer, EMPTY0);
+  array_free (fdchange, EMPTY);
+  array_free (timer, EMPTY);

 #if EV_PERIODIC_ENABLE
 #if EV_PERIODIC_ENABLE

-  array_free (periodic, EMPTY0);
+  array_free (periodic, EMPTY);

 #endif
 #endif

-  array_free (idle, EMPTY0);
-  array_free (prepare, EMPTY0);
-  array_free (check, EMPTY0);
+  array_free (prepare, EMPTY);
+  array_free (check, EMPTY);

 
   backend = 0;
 }
 
   backend = 0;
 }


@@ -1128,18 +1165,6 @@ ev_default_fork (void)
 
 /*****************************************************************************/
 
 
 /*****************************************************************************/
 

-int inline_size
-any_pending (EV_P)
-{
-  int pri;
-
-  for (pri = NUMPRI; pri--; )
-    if (pendingcnt [pri])
-      return 1;
-
-  return 0;
-}
-

 void inline_speed
 call_pending (EV_P)
 {
 void inline_speed
 call_pending (EV_P)
 {


@@ -1239,6 +1264,29 @@ periodics_reschedule (EV_P)
 }
 #endif
 
 }
 #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
+

 int inline_size
 time_update_monotonic (EV_P)
 {
 int inline_size
 time_update_monotonic (EV_P)
 {


@@ -1272,10 +1320,10 @@ time_update (EV_P)
           /* 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
           /* 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
            * 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; )
             {
            */
           for (i = 4; --i; )
             {


@@ -1307,7 +1355,7 @@ time_update (EV_P)
           periodics_reschedule (EV_A);
 #endif
 
           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;
         }
           for (i = 0; i < timercnt; ++i)
             ((WT)timers [i])->at += ev_rt_now - mn_now;
         }


@@ -1337,17 +1385,28 @@ ev_loop (EV_P_ int flags)
             ? EVUNLOOP_ONE
             : EVUNLOOP_CANCEL;
 
             ? 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 */
-      #if EV_FORK_ENABLE
-        if (expect_false (postfork))
-          if (forkcnt)
-            {
-              queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
-              call_pending (EV_A);
-            }
-      #endif
+#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
+      /* we might have forked, so queue fork handlers */
+      if (expect_false (postfork))
+        if (forkcnt)
+          {
+            queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
+            call_pending (EV_A);
+          }
+#endif

 
       /* queue check watchers (and execute them) */
       if (expect_false (preparecnt))
 
       /* queue check watchers (and execute them) */
       if (expect_false (preparecnt))


@@ -1356,6 +1415,9 @@ ev_loop (EV_P_ int flags)
           call_pending (EV_A);
         }
 
           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);
       /* we might have forked, so reify kernel state if necessary */
       if (expect_false (postfork))
         loop_fork (EV_A);


@@ -1365,9 +1427,9 @@ ev_loop (EV_P_ int flags)
 
       /* calculate blocking time */
       {
 
       /* calculate blocking time */
       {

-        double block;
+        ev_tstamp block;

 
 

-        if (flags & EVLOOP_NONBLOCK || idlecnt)
+        if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt))

           block = 0.; /* do not block at all */
         else
           {
           block = 0.; /* do not block at all */
         else
           {


@@ -1401,6 +1463,7 @@ ev_loop (EV_P_ int flags)
             if (expect_false (block < 0.)) block = 0.;
           }
 
             if (expect_false (block < 0.)) block = 0.;
           }
 

+        ++loop_count;

         backend_poll (EV_A_ block);
       }
 
         backend_poll (EV_A_ block);
       }
 


@@ -1413,9 +1476,10 @@ ev_loop (EV_P_ int flags)
       periodics_reify (EV_A); /* absolute timers called first */
 #endif
 
       periodics_reify (EV_A); /* absolute timers called first */
 #endif
 

+#if EV_IDLE_ENABLE

       /* queue idle watchers unless other events are pending */
       /* queue idle watchers unless other events are pending */

-      if (idlecnt && !any_pending (EV_A))
-        queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
+      idle_reify (EV_A);
+#endif

 
       /* queue check watchers, to be executed first */
       if (expect_false (checkcnt))
 
       /* queue check watchers, to be executed first */
       if (expect_false (checkcnt))


@@ -1423,9 +1487,8 @@ ev_loop (EV_P_ int flags)
 
       call_pending (EV_A);
 
 
       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;
 
   if (loop_done == EVUNLOOP_ONE)
     loop_done = EVUNLOOP_CANCEL;


@@ -1471,12 +1534,19 @@ ev_clear_pending (EV_P_ W w)
     }
 }
 
     }
 }
 

+void inline_size
+pri_adjust (EV_P_ W w)
+{
+  int pri = w->priority;
+  pri = pri < EV_MINPRI ? EV_MINPRI : pri;
+  pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
+  w->priority = pri;
+}
+

 void inline_speed
 ev_start (EV_P_ W w, int active)
 {
 void inline_speed
 ev_start (EV_P_ W w, int active)
 {

-  if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
-  if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
-
+  pri_adjust (EV_A_ w);

   w->active = active;
   ev_ref (EV_A);
 }
   w->active = active;
   ev_ref (EV_A);
 }


@@ -1720,7 +1790,7 @@ ev_child_stop (EV_P_ ev_child *w)
 #define DEF_STAT_INTERVAL 5.0074891
 #define MIN_STAT_INTERVAL 0.1074891
 
 #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
 
 #if EV_USE_INOTIFY
 # define EV_INOTIFY_BUFSIZE 8192


@@ -1881,7 +1951,7 @@ ev_stat_stat (EV_P_ ev_stat *w)
     w->attr.st_nlink = 1;
 }
 
     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));
 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
 {
   ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));


@@ -1891,8 +1961,20 @@ stat_timer_cb (EV_P_ ev_timer *w_, int revents)
   w->prev = w->attr;
   ev_stat_stat (EV_A_ w);
 
   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);
       #if EV_USE_INOTIFY
         infy_del (EV_A_ w);
         infy_add (EV_A_ w);


@@ -1949,15 +2031,24 @@ ev_stat_stop (EV_P_ ev_stat *w)
 }
 #endif
 
 }
 #endif
 

+#if EV_IDLE_ENABLE

 void
 ev_idle_start (EV_P_ ev_idle *w)
 {
   if (expect_false (ev_is_active (w)))
     return;
 
 void
 ev_idle_start (EV_P_ ev_idle *w)
 {
   if (expect_false (ev_is_active (w)))
     return;
 

-  ev_start (EV_A_ (W)w, ++idlecnt);
-  array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
-  idles [idlecnt - 1] = w;
+  pri_adjust (EV_A_ (W)w);
+
+  {
+    int active = ++idlecnt [ABSPRI (w)];
+
+    ++idleall;
+    ev_start (EV_A_ (W)w, active);
+
+    array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
+    idles [ABSPRI (w)][active - 1] = w;
+  }

 }
 
 void
 }
 
 void


@@ -1969,12 +2060,15 @@ ev_idle_stop (EV_P_ ev_idle *w)
 
   {
     int active = ((W)w)->active;
 
   {
     int active = ((W)w)->active;

-    idles [active - 1] = idles [--idlecnt];
-    ((W)idles [active - 1])->active = active;
-  }

 
 

-  ev_stop (EV_A_ (W)w);
+    idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
+    ((W)idles [ABSPRI (w)][active - 1])->active = active;
+
+    ev_stop (EV_A_ (W)w);
+    --idleall;
+  }

 }
 }

+#endif

 
 void
 ev_prepare_start (EV_P_ ev_prepare *w)
 
 void
 ev_prepare_start (EV_P_ ev_prepare *w)